Marc Klapholz, MD

• Department of Medicine
• Division of Cardiology
• UMDNJ-New Jersey Medical School
• Newark, NJ

Some advocate a horizontal (0 degrees) head position hiv infection rates australia 800 mg zovirax order with visa, others an elevated position stages for hiv infection 200 mg zovirax buy with mastercard, and still others suggest alternating the positions throughout the day antiviral drugs name zovirax 200 mg lowest price. Advocates of the horizontal position base their rationale on "physical reasons" antivirus for mac discount zovirax 400 mg otc, because anti viral sore throat order zovirax 400 mg free shipping, in theory, this position diminishes the potential space (which can be increased by the cerebral atrophy that accompanying ageing) where hematoma could develop. In addition, horizontal position annuls the effect of the gravity, improves cerebral perfusion and favours cerebral expansion due to vigorous transmission of arterial compression waves within cerebral parenchyma. Finally, the horizontal position theoretically improves the drainage of subdural collections. Additionally, remember that two theories try to explain the growth of subdural hematoma: the osmotic theory and the theory of recurrent bleeding. Both these components disappear, at least hypothetically, when the head is elevated because the necessary pressure gradient for the development of the osmotic theory diminishes and the action of gravity decreases the intraluminal pressure from the neoformation vessels of the external membrane of the hematoma that originate recurrent bleeding. Gastrointestinal system of the neurocritically ill patients does not work correctly, becoming paralyzed or slowed down due to cerebral damage or side effects of the drugs commonly administered. In addition, the use of acid blockers such as omeprazole and lanzoprazole, or blockers of the acid secretion of the stomach like ranitidine, elevate the pH, thus favouring the growth of microorganisms, mainly Gram-negative species. All these aspects can augment the risk of continuous microaspirations, which is one of the main risk factors in the pathogenesis of ventilation-associated pneumonia. This risk remarkably decreases when the head of the bed is raised to 30 degrees or more. In conclusion, there is no consensus on head position during the postoperative period. Nakajima reported that the rate of recurrence is the same for both positions, whereas Miele et al. Anecdotal series, with a small number of patients, or single case reports suggest a favourable effect of corticosteroid therapy in conservative treatment. In a small series of 50 subjects, the estimated incidence was 32%, whereas the average rate was 3 and 0. Since all the reported studies were retrospective, the systematic use of anticonvulsants cannot be recommended. We use anticonvulsants agents in the following circumstances: · History of epilepsy. If the patient is already efficaciously treated with anticonvulsants, the same therapeutic scheme should be continued. Antibiotics Although most neurosurgeons or neurointensivists prescribe antibiotics, the best timing, dosage, administration route and therapeutic options are still unclear. The main reasons for deterioration during the postoperative period are complications associated with hematoma evacuation. This is the reason for which the intensivist must learn to recognize them early for take all necessary measures for their quick and favourable resolution. The complications rate is >20%, with recurrence of hematoma the most frequent one. The incidence of recurrences is 8-45% depending on the series analyzed, and the main risk factors are patient age and the anatomical characteristics of the collection and the membrane. It is often difficult to differentiate between the residual liquid of the surgery and the liquid caused by re-accumulation of the hematoma from recurrent bleeding. This last possibility must always be taken in to consideration especially in patients who do not improve or deteriorate during the postsurgical period. In such cases, the drainage debit should be monitored, paying attention to the occurrence of abrupt increases or decreases. This is favoured by the slow re-expansion of an atrophic brain, chronically compressed by hematoma. Air accumulation can be prevented by maintaining the head horizontal, irrigating the cavity with saline solution to promote slow drainage together with residual hematoma. Nevertheless, and even with preventive measures, the entrapped air can sometimes increase the pressure, causing mass effect and neurologic deterioration. Hypertensive pneumoencephalus in of the entrapped air increases as the the anterolateral region of the frontal lobes with body temperature rises. McKissock in 1960 was the first to describe a patient who deteriorated suddenly and died after hematoma evacuation. Several theories have attempted to explain this phenomenon but the most consistent one is that the sudden decompression following evacuation of the hematoma is related to a significant increase in cortical cerebral blood flow in blood vessels that have lost their autoregulation. This hypothesis is not sufficient to explain the bleeding that occurs distant from the surgical site, so other factors must be considered, such as coagulopathy, hypertension, amyloid angiopathy, direct damage to the vasculature as a result of displacement, etc. Other postsurgical complications (approximately 10% of cases) are reversible delirium, or confusional state caused by intracranial hypotension or the onset of seizures. Other complications are infections, which, although rare, cover a wide spectrum from wound infection to subdural empyema. The preoperative state of consciousness has been found to be of great0 Neurologically normal er significance in different case series. Interestingly, 4 Comatose with absent motor responses there is no relationship between hemato to painful stimuli, decerebrate or ma volume, degree of impaired consciousdecorticate posturing ness and/or outcome. The reported mortality is 0-38% depending on the population studied, with an average of 16%. Approximately 75% of patients return to their previous activities and 15% remain with severe disabilities. Trauma is the most frequent etiology, but there is a trigger event in half of cases. Clinically, it can take various forms and can mimic many other situations or neurological disorders. Computed tomography is the complementary method of choice for diagnosis and monitoring of this patient group. Clin Neurol Neurosurg 2007; 109: 152-7 Asadollahi M, Aleali H, Amirjamshidi A, et al. Nonsurgical treatment of chronic subdural hematoma with steroids: two case reports (in French). Inflammation markers and risk factors for recurrence in 35 patients with a posttraumatic chronic subdural hematoma: a prospective study. Role of angiogenic growth factors and inflammatory cytokine on recurrence of chronic subdural hematoma. Relation of regional subdural blood flow to hemiparesis in chronic subdural hematomas. Cerebral blood flow and oxygen metabolism in hemiparetic patients with chronic subdural hematoma. Influence of head position on the effectiveness of twist drill craniostomy for chronic subdural hematoma. Surg Neurol 2005; 63: 420-3 · · · · · · · · · · · · · · · · · · · 1612 Chronic Subdural Hematoma: A Forgotten Entity in Neurocritical Care · · · · · · · · · · · · · · · · · · · Nakajima H, Yasui T, Nishikawa M, et al. The role of postoperative patient posture in the recurrente of chronic subdural hematoma: a prospective randomized trial. Dexamethasone treatment of a patient with large bilateral chronic subdural hematomas. Chronic subdural hematomas and seizures: the role of prophylactic anticonvulsive medication. The management of primary chronic subdural hematoma: a questionnaire survey of practice in the United Kingdom and the Republic of Ireland. What are the causative factors for a slow, progressive enlargement of a chronic subdural hematoma Spontaneous intracerebral haemorrhage following evacuation of chronic subdural hematomas. Can midline brain shift be used as a prognostic factor to predict postoperative restoration of consciousness in patients with chronic subdural hematoma Independent predictors for recurrence of chronic subdural hematoma: a review of 343 consecutive surgical cases. Vascular endothelial growth-permeability factor in granulation tissue of chronic subdural hematomas. Concepts of neurosurgical management of chronic subdural hematoma: historical perspectives. Outcome of contemporary surgery for chronic subdural hematoma: evidence based review. J Neurol Neurosurg Psychiatry 2003; 74: 937-43 Yamada M, Suzuki A, Yasui N, et al. No Shinkei Geka 2002; 30: 1053-7 1613 89 Intoxication With Central Nervous System Depressant Agents Claudia Analía González 1, Roxana Andrea Bertrand 1 1 Unit of Toxicology and Pharmacovigilance. The most common cause of intoxication in adults is attempted suicide, followed by accidental causes, mainly in children. Given the severity of the emergency that this type of drug can cause, it is critical to correctly evaluate the problem, with adequate patient interview, physical examination and complementary methods. The aim is to reach a presumptive diagnosis, understanding the most likely etiology and start specific treatments immediately. Few signs and symptoms are special features and, on the contrary, are often similar to those presented by other diseases such as infectious disease, stroke, coma, etc. A thorough physical examination is essential to search for meaningful data (Table 89. Toxicological screenings are limited and not always available in all emergency departments; therefore, available laboratory tests should be performed, such as acid-base status, electrolytes, glucose, urea, white blood cell count, hematocrit, creatine, lactic acid, anion gap, and urine sediment. The physical examination will disclose signs that can help in the diagnosis: vital functions (blood pressure, heart rate, pulse), skin and mucosa colour, smell of the expired air and the vomit or clothes, body temperature, and breathing pattern. This is of great clinical importance, because it represents the key point to understand whether the clinical features are related to a structural cause (stroke or subdural hematoma) or to a toxic/metabolic cause (intake of psychiatric drugs, opioids, Clinical features Miosis, bradycardia, nystagmus, ataxia, coma, hypoglycemia, hypothermia, ethyl breath Muscle hypotonia, drowsiness, stupor, coma, seizures, cardiorespiratory depression, hyporeflexia, ataxia, hypothermia Nystagmus, somnolence, cardiorespiratory depression, hypotension, slurred speech, hypotonia, ataxia, dysarthria, hypothermia, miosis, flaccid coma Sensory depression, bradypnoea, coma, seizures, spasticity, hyperreflexia, bradycardia, constipation, hypotension, hypothermia, miosis Arrhythmias, hypotension, hypothermia, sensory impairment, oculocephalic crisis spasmodic torticollis, hypertonia, myoclonus, ataxia, orolingual dyskinesia Convulsions, sensory depression, extrapyramidal symptoms, anticholinergic symptoms, arrhythmias, hypotension, hypothermia Hypotension, hypothermia, tremor, hyperreflexia, dysarthria, coma, convulsions, sensory depression, anticholinergic symptoms, arrhythmias Nausea, vomiting, myoclonus, mydriasis dysarthria, nystagmus, ataxia, diplopia, blurred vision, respiratory depression Arrhythmias, hypotension, nausea, vomiting, seizures, tremors, nystagmus, vertigo, mydriasis, dysarthria mental confusion, ataxia diplopia, blurred vision Suspected substance Alcohol Benzodiazepins Barbiturates Opioids Phenothiazines Butyrophenones Tricyclic antidepressants Carbamazepine Phenytoin Anticonvulsants Table 89. Therefore, a quick and easy way to orient toward the etiology is to analyze three parameters: pupils, equal and reactive to light; eye position at rest and response to challenging manoeuvres; motor response to painful stimuli. In contrast, pupillary reflexes are altered earlier when the disorder is due to a structural cause (Table 89. Vomiting Vomiting is caused by pharyngeal stimulation or administration of syrup of ipecac (1530 ml in adults and 15 ml in children), followed by approximately 250 ml of water. If this treatment is not effective within 20 minutes, it should be repeated by stimulating the jaws. If vomiting fails, gastric lavage should be performed in order to decontaminate and prevent the absorption of ipecac. This treatment should not be performed in children <6 months of age or in patients in coma or with convulsions. Gastric Lavage A nasogastric tube of the largest possible diameter should be used. The patient is placed in the Trendelenburg position with the head turned to the left, while inserting the na1617 Intensive Care in Neurology and Neurosurgery sogastric tube. Then normal saline solution or water should be administered (volume 10-15 ml/ kg in children and 200 to 400 ml in adults), repeating lavage cycles until the instilled liquid is equal to the removed one. The liquid should never be introduced under pressure never exceeding the capacity of the stomach, which would otherwise cause opening of the pylorus and rapid passage of toxic substances in to the duodenum. The lavage liquid extracted will be collected in wide mouth jars for analysis and forensic toxicology. Gastric lavage may be performed at any age and even in unconscious patients after tracheal intubation and airway protection. Administration of Absorbent Substances Activated carbon, also called activated charcoal, acts by adsorption to form non-absorbable macromolecules. The dosage is 15-30 g in children and 50-100 g in adults, dissolved in 100-150 ml of water or a carbonated drink. For toxic enterohepatic circulation, activated charcoal, which may start up to 12 hours after ingestion, is indicated in multiple doses, every 4 hours at a dose of 0. This is contraindicated in case of paralysis, obstruction or perforation of the ileus or in comatose patients without airway protection. Once the toxic agent is adsorbed, its passage through the digestive tract should be accelerated by the administration of purgatives. The dosage is 13-30 ml in children and 60 ml in adults every 4 hours, until the colour of coal deposition. Other cathartics used are sodium sulphate or magnesium: 30 g in 250 ml of water for adults, with a maximum of three doses, and 70%sorbitol solution, 50-70 ml every 4 hours. Oleose purgatives, solbitol and salite solutions are not recommended for pediatric use because of the risk of causing severe electrolyte alterations. The administration of cathartics is contraindicated in patients <1 year of age or in patients with diarrhoea, evidence of intestinal obstruction, bleeding, perforated viscus or peritonitis, electrolyte alterations, dietary sodium restriction, and renal failure for magnesium sulphate. Forced diuresis promotes the elimination a copious flow of urine (5-10 ml/min or 500 ml/h) through the provision of sufficient fluids intravenously, and, depending on the pKa of the toxic agent, at changing urinary pH by the administration of alkalizing substances such as sodium bicarbonate (1-2 mEq kg in dextrose solution 5%) in order to raise the urinary pH to 7. Other methods that can be used in specific cases include: peritoneal dialysis, hemodialysis, hemoperfusion, exchange transfusion, and plasmapheresis. Its use is recommended in cases of coma and respiratory depression secondary to the use of benzodiazepines. Flumazenil administration may involve risks for patients with hypotension, arrhythmias or hemodynamic instability; furthermore, it can cause seizures in patients with a history of epilepsy, increased intracranial pressure, concomitant ingestion of tricyclic antidepressants, anticonvulsants or cocaine, and benzodiazepine withdrawal syndrome in addicted patients. The use of flumazenil is unnecessary in most cases and can be associated with high risks, so it should be restricted to selected cases. Its effect begins within 1-2 minutes after the first dose and persists for 1-5 hours, depending on dose and type of benzodiazepine involved. Closely monitor the state of ileus, because of the anticholinergic effects of the drug. The cathartic should be administered after the first dose of charcoal and repeated at the same dose if no bowel movement is observed within 4 h, taking care not to repeat the activated carbon until an effective catharsis is obtained. Do not administer drugs such as phenytoin or antipsychotics such as haloperidol and group I antiarrhythmics, which increase the risk of cardiac toxicity and decrease the threshold of seizure. If sensory depression exists, endotracheal intubation prior to gastric lavage should be done, considering that aspiration is a cause of high mortality. If mannitol is not available, magnesium sulphate should be administered (30 g in adults and 250 mg/kg in children). If in the following 4 h the effect is not obtained, an additional dose of cathartic should be administered. Keep in mind that these drugs have enterohepatic circulation, so carbon administration must be repeated serially for 24 and 48 h.

This may be diminished by not completely dissecting a large sac out of the scrotum but instead by dividing it and not interfering with the arterial and venous plexi that adhere directly to the sac distally hiv transmission statistics condom zovirax 800 mg purchase fast delivery. This supports the contention that excessive handling of the cord and partial injuries to the nerve during manipulation are most likely to blame in the few severe cases rather than adherence to the mesh itself antiviral kit buy zovirax with amex. Avoidance of the nerves or even division of the nerves rather than excessive handling may well result in a lower incidence of this problem hiv infection early symptoms order zovirax 400 mg free shipping. Occasionally antiviral nhs buy 200 mg zovirax overnight delivery, these patients may require nerve blocks hiv infection rates in thailand purchase zovirax online from canada, ablation, or rarely exploration and resection. Radical retropubic prostatectomy frustrated by prior laparoscopic mesh herniorrhaphy. Prolene Hernia System compared with mesh plug technique: A prospective study of short- to midterm outcomes in primarygroinherniarepair. Robart Condon said, "The anatomy of the inguinal region is misunderstood by some surgeons of all levels of seniority. The understanding of the pathology of hernia formation in this region is still evolving, and humbles us with each new discovery. The pursuit of the ideal solution for groin hernia repair therefore necessarily incorporates as a foundational cornerstone knowledge of the anatomy and pathology affecting the pelvic O. Prosthetic devices whose design processes begin with these foundations will lead the way toward the ultimate goal. The integrity or vulnerability of the tissue within each triangle is dependent upon multiple variables, and can be enhanced or diminished by the introduction of mesh prosthetics in the repair of groin hernias. In the pre-mesh era of groin berniorrapby, prior to the introduction of the Lichtenstein onlay mesh technique, failures occurred predominantly in the medial triangle of the inguinal region, often adjacent to the pubic tubercle. Eventually, the reason generally accepted for these failures was the degree of tension created with the mobilization and suturing of tissues adjacent to the original defect. Following the adoption of tension-free methods employing various mesh materials and techniques, medial triangle recurrences became rare while recurrent hernias presenting through the lateral triangle became more common. Arthur Gilbert and colleagues at the Hernia Institute of Florida, and was introduced in 1999. Z Prolene Hernia System411· Chapter 4 Prolene Hernia System 35 however, reports have been published which refute this concern, and it is our belief that choice of technique and materials should not be limited by potential future pathology. Questions have also been raised about the potential adverse effect of mesh devices, particularly polypropylene, upon the integrity of the iliac vessels and the patency of the vas deferens. In our experience, and based upon other published reports, these concerns are unwarranted. As in any surgical procedure, careful history and physical examination is essential. Accurate documentation of any previous abdominal, pelvic, vascular, or groin surgery can lead to the selection of an altemant approach to preperitoneal mesh placement for groin hemiorraphy. Skin infection or other conditions which could lead to poor healing or potential complications should be resolved when possible prior to implantation of any foreign body, particularly synthetic mesh. The use of enteral or parenteral perioperative antibiotics, and the practice of antibiotic irrigation during mesh hemiorraphy have been debated for years. Most authors conclude that there is no statistically significant advantage to the use of antibiotic prophylaxis in the performance of routine inguinal hernia repair with or without synthetic mesh prosthesis. Nevertheless, many surgeons argue that antibiotic prophylaxis is both inexpensive and safe, and that such practice should not be considered inappropriate. Gel prep cleansers reduce the incidence of caustic chemical skin irritation in the dependent skin folds near the thigh and perineum. Surgical exposure of the inguinal region is accomplished through a 3 inch oblique incision minimizing dissection where possible. Appropriate retractors are placed, and stretching and pressure on the skin is avoided. The external oblique aponeurosis is opened in the direction ofits fibers, and medial and lateral flaps of this layer are minimally mobilized and retracted. In cases where a bifurcated nerve hinders necessary dissection, the minor branch is sacrificed sharply and ligated with fine, absorbable suture. It is widely agreed that an injured nerve is more problematic than a divided nerve; therefore, suspected injury warrants division and ligation. A direct hernia, if present, is separated from its attachments to the under surface of the cord structures. This is particularly important to ensure that the hernia sac will be freed from the lateral triangle in order to permit separation of the peritoneum lateral to the internal ring. There are several lymph nodes between the peritoneum and the iliac vein, which may or may not require dissection; however, surgeons who are new to this procedure are advised to exercise great care in separating these lymph nodes, and optimal mesh deployment overlying the iliac veins does not necessarily require this lymph node dissection. This maneuver is safely facilitated using the back end of the Debakey forcep to unroll this leaflet in to position, draping over the retroperitoneal structures. This is acceptable provided the dissection of the lateral triangle is not impeded by the adherence of the peritoneum to the undersurface of the internal ring. Alternant approach for Direct Hernia Repair refer to video) · It has become our preference and practice to approach direct hemia repair with the same intemal ring access as in an indirect hernia repair. A B · the major advantage of this approach is to directly visualize the retroperitoneal structunls including the vas deferens and iliac vessels through the internal ring, confirming the separation of the peritoneal sac from the internal ring and lateral triangle, and to position the central connector of the device in the internal ring. Following absorption of the Monocrylalaments, the remaining mash affords sufficient strength of repair with the reported advantages of lightweight mesh. Our solution to the challenges of these handling characteristics includes an alternant method of mash preparation and insertion, which takes advantage of the plastic quality of the Monocryl components. A suture is employed totemporarily maintain the scroll in this configuration during initial implantation and positioning. The lateral margin of the internal ring is elevated upward with a retractor to allow the lateral end of the scrolled mash to be inserted and advanced in to the lateral triangle. The index finger or back end of a Debakey forcep is used to unroll the cephalad scroll in to position under the aponeurotic arch and beneath the deep epigastric vassals. The underlay mesh deployment is completed, establishing a mesh roof superficial to the preparitonaal fat medially, and the peritoneum laterally. Specific data and discussion on recurrence rates will be addressed in the next section on results. Rare infections involving polypropylene mesh, regardless of density and weight, are usually effectively treated without the requirement of mesh removal. Retroperitoneal hematoma can occur if operative injury to the deep epigastric vessels or their branches are unrecognized, or from injury to the iliac, obturator, or testicular vessels. Patients with chronic postoperative groin pain are managed conservatively, referring to pain management in parsistent cases, and rarely require surgical neurectomy. The rate of recurrence following inguinal hernia repair has long been considered the defining quality of any repair method or technique. In a follow-up report by Gilbert in 2004, three recurrences were known among 4,801 repairs, for a rate of 0. The role of antibiotic prophylaxis in prevention of wound infection after Uch· tenstein open mesh repair of primary inguinal hernia. A pragmatic approach to cutaneou9 nerve division during open inguinal hernia repair. The role of single-shot antibiotic prophylaxis in inguinal hernia repair: a metaanalysill approach of 4336 patients. Influence of mesh materials on the integrity of the vas deferens following Lichtenstein hernioplasty: an experimental model. Incislonal, epigastric and umbllical hernia repair using the Prolene Hernia System: describing a novel tech· nique. Systemic allargic reaction tn polypropylene mesh used in surgical treatment of cystocoele. Herniorrhaphy with polypropylene mesh causing inguinal vasal obstruction: a prevent· able cause of obstructive azoospermia. Following extensive study of the anatomy of the inguinal region, he devised a revolutionary method for the surgical treatment of inguinal hernia: the Bassini operation. Resting on firm anatomic and pathophysiologic foundations, his technique improved on previous empirical methods. Nonetheless, there is a need to keep abreast of new developments as surgical techniques continue to evolve. At this meeting, the state of the art was defined and the figure of this illustrious physician commemorated. Biography of Eduardo Bassini Edoardo Bassini was born in to a family of wealthy landowners and patriots in Pavia in 1844. He studied medicine at the University of Pavia, graduating in 1866 at the age of only 22 years. What is certain is that from an early age he was fascinated by the movement for Italian unification. A friend of the Cairoli brothers, prominent figures in the Italian Risorgimen to , he joined the unification movement as an infantry soldier during the third war of independence. In June 1867, together with the Cairoli brothers, he fought in the battle of Villa Glori near Terni. Numerous historical accounts describe the bayonet assault of 78 men against a troop of 1,000 soldiers. During the battle, Bassini was wounded by a Zouave who took him by surprise and planted a bayonet in his abdomen. After the battle, Bassini was brought by the few remaining survivors in a cart to the Holy Spirit Hospital, where he was nursed for several months because of a fecal fistula and stercoraceous peritonitis resulting from the bayonet wound to the iliac right fossa 47 48 Part I Open Inguinal Hernia figur· 5. The wounded did not receive particular care because the hospital surgeons believed them inoperable. Thanks to his extraordinary physical resistance, he recovered from the peritonitis but remained stercoraceous probably because of the fecal fistula. He was transferred to Pavia where was placed in the care of Luigi Porta, a great clinical surgeon of that time. During his long stay in the clinic, he gained the friendship and esteem of Porta, who urged Bassini to become a surgeon. These experiences, his background, and character would prepare him for a brilliant surgical career. Descending from a long lineage of farmers, he grew up in an agrarian community, living among man who worked the fields. Since his youth he admired the hard work of common laborers, who were poorly paid for the hardships they endured. His love of the land and farming people remained in his heart, though he would later have little contact with rural life. Accustomed to hard work and sacrifice, he acquired a rigid character, yet earned the respect and admiration of his collaborators. An operating room nurse once said of him, without a grudge but with much pride, that he was a very good person, while he was showing him the shin scars the teacher had given him. He was surely a generous man; while still alive, gave his farms to his laborers and willed everything he had to the Milan Institute for the Poor which bears his name today. He showed determination when he declined a professorship at the University Parma because the competition was irregular, preferring to remain in La Spezia, where his mentor Porta had found him a temporary post so that he could gain experience. After attaining a professorship in Padua, he devoted himself to the study of inguinal and crural hernia, reviewing descriptive anatomy and applied anatomy and conducting cadaver studies in which he tasted his operating techniques. Chapter 5 the Bassini Operation 49 On Christmas Eve of 1884, he carried out an operation for inguinal hernia for the first time using the mathod he had devised and which he would repeat in 1885 and 1886. On the 50th of the operation, his students Fasiani and Catterina wrote: "Half a century has passed and the Bassini method remains a conquest that has survived an criticisms, all attempts at change and daily verification countless times the world over. On seeing that his career as teacher and surgeon had ended it course, he said good-bye to his first assistant Mario Donati, who was waiting at the clinic door, and retired to his house in Vigasio. Bassini left to posterity the rational dexterity of his hands and the principle of restoring a diseased organ to its original anatomy and function. Widely regarded as a meticulous and careful operator, he was considered a great man, teacher, and surgeon in the noblest sense. Incision of the Skin and the Subcutaneous Planes the cutaneous incision starts at the pubic tubercle, placed laterally to the pubic symphysis, and runs for 8 to 12 em to the anterior superior iliac spine. Identified in the subcutaneous adipose tissue, the superficial epigastric vessels are tied and dissected. Release of the external oblique aponeurosis muscle from the innominate fascia (which connects in to the spermatic fascia composed of loose cellular tissue), exposes the superficial inguinal ring. Incision of the External Oblique Aponeurosis the external oblique aponeurosis muscle runs along the course of its fibers; an incision of the aponeurosis is placed on the upper rim of the superficial inguinal ring to expose the inguinal canal. This exposes the genital branches of the iliohypogastric and the ilioinguinal nerve. The iliohypogastric nerve lies on the internal oblique muscle, parallel and superior to the spermatic cord: a superior terminal branch leaves the inguinal canal through a small orifice medially and superior to the superficial inguinal ring. Both nerves must be identified for selective block with local anesthetic and to prevent inadvertent injury or entrapment while placing the suture. Isolation of the Spermatic Cord the spermatic cord is isolated from the posterior wall of the inguinal canal. The aponeurosis is then incised in the direction of its fibers to the superficial inguinal ring, thus providing wide exposure of the inguinal canal. Completely freed, the spermatic cord is encircled with a Penrose drain end pulled forward so that it can be detached from the posterior wall of the inguinal canal, consisting of the transversalis fascia. The spermatic cord is thus completely freed from the deep inguinal ring until the pubic tubercle. The internal oblique muscle is visible superiorly, the transversalis fascia deeply, and the inguinal ligament inferiorly. Resection of the Cremaster Muscle the cremaster muscle is elevated with two forceps and resected longitudinally to divide it in to two flaps: An upper and a lower flap. The lower flap, which contains the cremasteric vessels, is grasped with two small Klemmer forceps, ligated and sectioned. The genital branch of the genitofemoral nerve entering the inguinal canal at the deep inguinal ring is identified and then placed on the posterior aspect of the spermatic cord.

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Management of intracranial fungal infections in patients with haematological malignancies. Toxicity of amphotericin B plus flucytosine in 194 patients with cryptococcal meningitis. Flucytosine: a review of its pharmacology, clinical indications, pharmacokinetics, toxicity and drug interactions. Activity of posaconazole in the treatment of central nervous system fungal infections. Refractory candidal meningitis in an immunocompromised patient cured by caspofungin. Dexamethasone treatment for acute bacterial meningitis: how strong is the evidence for routine use Risk of gastrointestinal bleeding from dexamethasone in children with bacterial meningitis. Prevention of auditory sequelae in pediatric bacterial meningitis: a meta-analysis. Am J Dis Child 1989; 143: 1051-5 1030 the Diagnosis and Management of Central Nervous System Infections in the Neurocritical Care Unit 201. Factors influencing the anti-inflammatory effect of dexamethasone therapy in experimental pneumococcal meningitis. Evaluation of combined ceftriaxone and dexamethasone therapy in experimental cephalosporin-resistant pneumococcal meningitis. Dexamethasone for the treatment of tuberculous meningitis in adolescents and adults. Effect of hydration status on cerebral blood flow and cerebrospinal fluid lactic acidosis in rabbits with experimental meningitis. Direct comparison of cerebrovascular effects of norepinephrine and dopamine in head-injured patients. Tissue oxygenation during management of cerebral perfusion pressure with phenylephrine or vasopressin. Drotrecogin alfa (activated) in patients with severe sepsis presenting with purpura fulminans, meningitis, or meningococcal disease: a retrospective analysis of patients enrolled in recent clinical studies. Crit Care 2005; 9: R331-R343 1031 Intensive Care in Neurology and Neurosurgery 220. Monitoring of intrathecal polymyxin B dosage during treatment of pseudomonas meningitis. Intraventricular or intrathecal use of polymyxins in patients with Gram-negative meningitis: a systematic review of the available evidence. Treatment of the secondary hydrocephalus of tuberculous meningitis by lateral ventricular drainage and drug injection. Evolution of central nervous system multidrug-resistant Mycobacterium tuberculosis and late relapse of cryptic prosthetic hip joint tuberculosis: complications during treatment of disseminated isoniazid-resistant tuberculosis in an immunocompromised host. Novel treatment of meningitis caused by multidrug-resistant Mycobacterium tuberculosis with intrathecal levofloxacin and amikacin: case report. The pharmacokinetics and efficacy of an aminoglycoside administered in to the cerebral ventricles in neonates: implications for further evaluation of this route of therapy in meningitis. Intrathecal administration of amikacin for treatment of meningitis secondary to cephalosporin-resistant Escherichia coli. Lack of value of routine analysis of cerebrospinal fluid for prediction and diagnosis of external drainage-related bacterial meningitis. The efficacy and cost of prophylactic and perioprocedural antibiotics in patients with external ventricular drains. Acta Neurochir Suppl 1998; 71: 47-9 1032 the Diagnosis and Management of Central Nervous System Infections in the Neurocritical Care Unit 237. Efficacy of antimicrobial-impregnated external ventricular drain catheters: a prospective, randomized, controlled trial. Surface heparinization of central venous catheters reduces microbial colonization in vitro and in vivo: results from a prospective, randomized trial. Can J Neurol Sci 2004; 31: 506-10 1033 58 Tuberculous Meningitis: the Critical Issues J. Some 22 high-burden countries, most of them in the developing world, collectively account for 80% of the global tuberculosis burden. Human immunodeficiency virus infection increases the lifetime risk of developing clinical tuberculosis post-infection to 1 in 3 [3]. This results in a local T-lymphocyte-dependent response, caseating granulomatous inflammation [10,11]. The pathological process of tuberculous meningitis includes basal exudate formation, an obliterative vasculitis, encephalitis and tuberculoma formation. Blockage through adhesion formation of the basal subarachnoid cisterns can result in hydrocephalus. An obliterative vasculitis of both large and small vessels, perforating vessels, commonly results in infarction in the territory of the affected vessel [10,11]. In an autopsy study of 190 cases of neurotuberculosis, hydrocephalus was noted in 71% and it was severe in 36%. Vasculitis and infarcts were noted in 70% of cases, whereas large infarcts involving the middle cerebral artery territory were noted in only 3. Tuberculomas often occur in the absence of tuberculous meningitis but may occur along with tuberculous meningitis. Tuberculomas are thought to arise when tubercles in the brain parenchyma enlarge without rupturing in to the subarachnoid space [13]. Tuberculous meningitis often presents with meningitis symptoms of fever (60-95%), headache (50-80%), and signs of meningismus (40-80%), focal neurologic deficits (hemiplegia 10-20%, paraparesis 5-10%, any cranial palsy 30-50%), behavioural changes (1030%) and altered mental status (30-60%). In a large cohort of children, the common clinical characteristics on admission were fever (67%), headache (25%). A rare clinical syndrome, tuberculous encephalopathy has been described in children. Post-mortem pathology showed diffuse cerebral edema and demyelination and was presumed to be due to allergic encephalomyelitis [24]. Other unusual clinical features include movement disorders, tremor, chorea, ballismus, and myoclonus [25]. The diagnostic sensitivity is 98%, the specificity is 44% when at least one feature is present, the sensitivity is 55% and the specificity is 98% if three or more features are present [27]. A maximum score of four or more on admission was diagnostic of tuberculous meningitis. Unfortunately, there is still no single diagnostic method that is both sufficiently rapid and sensitive. The opening pressure, in the absence of spinal block, is usually moderately elevated (180-300 mmH2O). Although the method has good sensitivity (95-100%) and specificity (91-99%), its limitations are that it requires expensive equipment and considerable expertise [13]. A study from Vietnam reported a bacteriological diagnosis of tuberculous meningitis in 81% of adults with the disease; acid-fast bacilli were seen in 58% patients and cultured from 71% patients. Semi-automated radiometric culture systems such as Bactec have reduced culture times. But the techniques are limited by the inability to differentiate acute infections from previous infection and problems with cross-reactivity, in addition to variable and often poor sensitivity and specificity. For the antibody assays the reported sensitivity (52-93%) and specificity (58-199%) were quite variable Similarly for the antigen assays, the sensitivity and specificity were 38-94% and 95-100%, respectively [13]. The value of these assays lies largely in the rapidity with which results can be obtained and the very good specificity of these tests [29]. The sensitivity of these assays is too low, and about half those testing negative will have the disease [32]. Though the image characteristics are nonspecific, the findings when correlated with the given clinical features may give a clue for the diagnosis [33]. Hydrocephalus and basal meningeal enhancement are the most common findings [33-39]. Most of the guidelines follow the model of short-course chemotherapy of pulmonary tuberculosis: an "intensive phase" of treatment with four drugs, followed by treatment with two drugs during a prolonged "continuation phase" [12]. The Infectious Disease Society of America, the Center for Disease Control and Prevention, and the American Thoracic 1039 Intensive Care in Neurology and Neurosurgery Drug Isoniazi Rifampin Pyrazinami Ethambutol Blood-brain Barrier Permeability Yes Yes inflamed Yes Yes inflamed Mechanism Bactericidal (Intra-extracellular) Bactericidal (intra-extracellular) Bactericidal (intracellular) Bacteriostatic Dose Children 10-15 mg/kg 10-20 mg/kg 15-30 mg/kg 15-20 mg/kg Adult 300 mg 600 mg 2000 mg 1000 mg Table 58. Society guidelines recommend an initial 2-month induction therapy with isoniazid, rifampin, pyrazinamide, and ethambutol, followed by 7 to 10 months of additional isoniazid and rifampin for an isolate that is sensitive to these drugs (Table 58. Recent a systemic review suggests that a 6-month regimen might be sufficient if the likelihood of drug resistance is low [40]. A recent Vietnam adult study of adjunctive dexamethasone therapy in tuberculous meningitis demonstrated a significant reduction in mortality but not in morbidity [55]. The study also found that treatment with dexamethasone was associated with less severe adverse events, particularly hepatitis. Dexamethasone does not seem to improve outcome by attenuating immunological mediators of inflammation in the subarachnoid space or by suppressing peripheral T-cell response to mycobacterial antigens [15]. There is some evidence to suggest that adjunctive dexamethasone may affect outcome from tuberculous meningitis by reducing hydrocephalus and preventing infarction [38]. The initial dose of dexamethasone is 8 mg/day for children weighing <25 kg and 12 mg/ day for children weighing 25 kg and for adults for 3 weeks and then decreased gradually during the following 3 weeks [56].

Negotiating the therapeutic alliance through cognitive rehabilitation was necessary to strengthen the bond needed for other therapeutic targets hiv infection and seizures purchase discount zovirax on-line. In every session antiviral for eyes cheap zovirax online amex, the self-rating scales (for example hiv infection rates michigan 400 mg zovirax mastercard, about his strengths and disabilities hiv infection impairs cell mediated immunity cheap 800 mg zovirax overnight delivery, personality traits hiv infection rate in nigeria cheap 200 mg zovirax with amex, and feelings) were included and discussed. His task-performance motivation with computer-based tasks remained high, and he started to tolerate uncertainty. Face and gesture expression increased a bit, eye contact was reached once or twice in a session, and he reacted sometimes spontaneously with one or two words and, rarely, with short sentences. For real-life activity, his father proposed some kind of computer course at first, because computer work was very motivating. The suitable course was not found because a full-time course was not acceptable to the family, and studying in large groups had earlier proved to be disastrous. Applied daytime activities for young persons with mutism proved to be very difficult to find. The daytime rehabilitation programs with mental health patients were not the best or accepted choices for the family. The day center activities for young people with autistic spectrum disorders were chosen as the first choice, at first 1 day per week. After an interview, Matti was accepted in to the day center and, after a few months, Matti started at the day center for one day per week as planned. His motivation has been high, and more days per week will be included in the future. Neuropscyhotherapy continues once every two weeks, with earlier goals in mind, in collaboration with the family, health care providers, and day center staff. Conclusion For successful working in neuropsychotherapy, it was necessary to have a detailed and appropriate description of the cluster of problems, as well as the strengths of the trainee. Collaboration and constructive interactions with the family and professionals involved 180 Introduction to Neuropsychotherapy in the process are the prerequisite for gainful work. Anna still lived with her parents and spent a few hours during the day at a sheltered work program doing small tasks, such as washing dishes and ironing. She had no earlier therapy except rare visits to a community psychologist during the previous year. She succeeded at mechanical reading, but her understanding and remembering of the text was poor. At night she would not sleep at times, and would repeatedly go to the washroom, disturbing her parents. She constantly wanted to leave the sheltered work program and get a normal job, but she had no idea what she wanted to do. Her own goal was to get out of the sheltered work program and find a real workplace. At therapy sessions, her agenda at first was to do cognitive rehearsals as much as possible, and she felt that conversation was a waste of 182 Introduction to Neuropsychotherapy time. In task situations, she was very impulsive, quickly trying to do as much as possible without any concern about the quality of her work, or mistakes. Gradually, she tolerated more conversation, told about problem situations at home (for example, her self-talk in the dark room) and at the sheltered work program (for example, impulsiveness), and we could negotiate the content of the sessions. After a few months of therapy, she could easily start the sessions by telling about problem situations from the previous week and reporting how she had managed to handle them and was able to stop to think what else she could have done, without obvious hurry to do cognitive rehearsals. Therapeutic focus was gradually shifted in to self-awareness by the discussion of strengths and disabilities. Notes of strategy Because of communication and abstract thinking problems, it was necessary to use plain language, picture aids, picture diaries, questionnaires (child versions with ready alternatives), and checklists to negotiate therapeutic alliance, including shared goals. Cognitive exercises were included as a part of therapy, but they were selected to serve her daily living needs (for example, mathematical tasks, included money handling, and visuospatial tasks, including time and route handling). As Anna accepted some changes for her goal to get a real job, it was possible for the author to have shared goals for future activities. She agreed that the first goal would be to get her life more tolerable in the present situation. In collaboration with her, her parents, and the sheltered work program staff (through phone contact and regular meetings at least four times per year), the most important goals were worked toward during therapy sessions, as well as at home and at the sheltered work program. She also kept a picture diary of therapy sessions, made together with the therapist, at the end of each session, to help her to understand and remember sessions. Because of her executive problems and the need for supervision, it was decided to apply a pictured plan of actions and instructions at home and at the sheltered work program to increase her independence in self-care and work tasks. Positive changes at home included hobbies and independence (she could go for a walk or see a movie by herself). At the sheltered work program, she behaved more flexibly in changing situations and was able to concentrate on different tasks, such as baking and other kitchen tasks. The therapy was recommended for a third year with the goal of integrating Anna in to society with more independent living and working status. During the third therapy year, Anna has succeeded in obtaining part-time supervised work, which includes assisting an office secretary. Conclusions Neuropsychotherapy is a treatment approach that allows us to understand and to treat the combination of developmental, neuropsychological, and neuropsychiatric symptoms, and reactive emotional and behavioral problems. Working with families and/or other caregivers, health care providers, and community services providers is essential to achieving and maintaining therapeutic targets during therapeutic processes, as well as after therapy. The experience of equality and the possibilities of developing personal skills in society despite the continuous need for support are the most effective ways to diminish reactive emotional and behavioral problems. Neuropsychotherapy applications are effective when included in various combinations of treatments tailored for the particular individual in the specifics of his or her current environment. Selective mutism: A review of the treatment literature by modality from 1980­1996. Elective mutism: A handbook for educators, counsellors and health care professionals. Tailoring treatments for individuals with attention-deficit/hyperactive disorder: Clinical and research perspectives. Neuropsychotherapy and community integration: Brain illness, emotions and behavior. Generalization of social skills through self-monitoring by adults with mild mental retardation. Multiplex developmental disorders: the role of communication in the construction of a self. Selective mutism and anxiety: A review of the current conceptualization of the disorder. The relationship between working alliance and therapeutic outcomes for individuals with mild mental retardation. The traditional approach to the family consists of a heterosexual family with a child. However, there are couples that remain childless either by choice or due to infertility. Remarriage of divorced couples creates new challenges for adults and children in new family constellations. In addition to those situations already mentioned, multicultural families, as well as families with a fundamental religious background often with many kids, set demands to the description of a family concept. It should also be kept in mind that a growing number of children are raised in families with parents representing sexual minority groups. Despite the diversity of family constructions, all of them are somehow living in a shared narrative. When the relationship is 187 188 Introduction to Neuropsychotherapy in equilibrium and the family roles are clear, these autobiographical narratives merge together, and they form the new experience of togetherness. In families suffering post-illness or injury, changes of the same basic conceptualizations can be seen, but the influences of shattered family roles and equilibrium must be worked through in a different way. The Essence of Being with Others the core experiences of being related with others are the base of existence. They are constructed of memories from our primary families and further sculpt our ability to accept and give care and protection in all later relationships. The need for protection is built in to our evolutionary nature and it is serves as life insurance. Under an experienced threat, security-seeking behaviour is activated, and an emotional balance has to be found. The balancing strategies, either empowering or devitalizing, depend on the expectations based on previous memories of terminated security-seeking behaviour. Expectations of being worthy of protection are the basis of core assumptions of the self. When these expectations are narrow minded, the balancing strategies are limited as well. Everyday environmental stressors challenge the abilities to adapt and to find a new balance. It can be assumed that the stiffer the emotional regulation system is, the more vulnerable the person is when being exposed to changes. The fragile system increases the risk for cumulating difficulties in adapting to everyday life challenges. The changes in behavioural and cognitive functioning, as well as emotional regulation, set a couple and the whole family in a new and unknown situation, where the old habits and ways to cope may be maladaptive. The former roles between the two adults may change in many Challenge to Change in the Family Narrative 189 ways. In terms of responsibility, caretaking, and communication, the roles that family members take in their shared narratives will be reformulated in more or less constructive ways. When the person who holds the responsibility in the family is injured, the responsibility is in a "free fall" until somebody else accepts it. The consequences may vary from a total disruption of the family to equally shared responsibility when the formerly nonresponsible spouse realizes existing hidden capabilities. In the perspective of caring, the roles of giving and taking care are equally and fundamentally important. If the injured spouse has never learned to receive care, it may be impossible to accept the role of being dependent, even when the need for help is crucial. The injurybased incapability of the previous family caregiver to hold the role may lead to a state of "caring vacuum. Communication includes the recognition and expression of cognitive and emotional information. According to structural approach (Minuchin, 1974; Sierla, 1999), the structure of the family is formed from communicative skills, as well as the different family situations in everyday life. The system tries to find the balance between different needs and demands of family members. While communicating, the emotional tone of messages is interpreted first, and this overlaps cognitive information. The uncontrolled volume, nuance, or prosody of the expression can fade the true intention of the message. In addition, the lack of emotional variation in expression can jeopardize the communication. Misinterpretations are common in all mutual relationships in the case, everyday conflicts. The unsolved ruptures and false interpretations in communication may be continuously present. However, the changed situation may channel the family development towards more adaptive and balancing communication. The therapist, with a neuropsychotherapeutic insight, sets a goal to combine both psychotherapeutic and neurocognitive knowledge related to brain and mind in the rehabilitation process. The narrative approach in neuropsychotherapeutic setting means reformulating a new story, narrative, sight, and interpretation to changes, as well as finding new insight and alternatives for understanding mutual relationships. Within narrative perspective, the knowledge of what has happened is conceptualized as a story, and reality can be verbally constructed. The meanings that families give to their difficult experiences regulate their behaviour and interaction. Total emotional emptiness is a straight consequence of the broken family narrative. When trying to find the optimal, adaptive alternatives, both the therapist and the family need to know the common history of the family. Merging both the old and new narratives is the foundation of a reconstructed presence and a bridge to the future (White & Epston, 1989, 1990; Holma, 1992, 1999). The need for a new narrative in a family that has met with the crisis of irreversible change is enormous. It is challenging to be sensitive to all the nuances, tones, and voices of the story; the therapist has to decide which stories are worth noticing and valuing. It may happen that both parts of the dyad can only hear and accept some views of the story, and the significant stories may differ greatly from each other. When a family is trying to find ways out of the acute crisis, some decisions have to be made. The common history of a couple gives some guidelines and support, but the heaviness of the present and the future can cause agony and raise difficult questions related to the commitment in the relationship. When the whole family system is spinning around in a vicious circle, the needs and demands cannot be expressed equally. It is hard to consider the level of devotion to a spouse, who may have lost his or her memories, or parts of his or her identity, or changed in to a totally different person. During the state of "narrative vacuum" (Hänninen, 1996), the noninjured spouse is at first hanging in the old shared family narrative. When the situation continues, the spouse eventually Challenge to Change in the Family Narrative 191 realizes that the "overarching theme" has fallen apart. The spouse is forced to rely on his or her past private autobiographical narrative. Thus, the risk may be that the emphasis of the narrative script will tune to a dominant narrative path, where all the new experiences are linked with the traumatic consequences of the insult. The ability to maintain the dialogue between two adults and to be able to express all sorts of feelings gives some tools to approach the changes that are related to getting injured.

It must be emphasized that treating the coagulopathy does nothing to treat the initial underlying cause of intracranial hemorrhage hiv infection timeline symptoms purchase 400 mg zovirax fast delivery. In fact hiv infection rates by county buy 200 mg zovirax amex, patients with smaller parameters) as soon as possible hemorrhages and with a favorable neuro· All patients should have immediate coagulopathy reversal hiv infection woman to man buy discount zovirax on line, even if hemorrhage is logical examination have the most to lose small and clinical condition is good from hematoma expansion acute hiv infection stories order zovirax with a visa. Warfarin reversal can be achieved through three different pathways: · Direct competition by administering vitamin K hiv infection by touching blood order cheap zovirax line. The different pharmacological and blood product options which are available target these different mechanisms and each has specific characteristics related to ease of administration, timing and duration of effect, and cost which may potentially influence the choice of their use. It usually takes at least 2 to 6 hours, and frequently 12 to 24 hours, for vitamin K to effectively reverse the effect of warfarin [3,4]. While the most efficacious route of administration is still debated, the effect of vitamin K is more rapid when given intravenously. Anaphylaxis from intravenous administration has been a previous concern but is likely extremely rare (3 per 10,000 doses in one study) [4]. Because of the short half-life and duration of action of the other warfarin-reversal options, vitamin K should be administered in all patients in order to avoid a rebound in coagulopathy after initial correction. Subcutaneous administration does not carry the same rare anaphylaxis risk as the intravenous route, but the onset of action is not as rapid or reliable. As a blood product, there is risk of blood-borne infection and transfusion-associated lung injury. Thus, they are very good agents for acute warfarin reversal because of the small volume, range of coagulation factors provided, and rapid onset of action. From University of California, Onset of action is very rapid and this San Francisco Neurovascular Service. Vitamin K should always be administered concurrently to avoid rebound coagulopathy. This suggests that it is the speed of reversal rather than the agent itself that is most important. Outcome was generally poor, with 77% of patients having a modified Rankin Scale score of 4 to 6. Randomized trials using patient mortality and neurological function as outcome have been proposed. Thus, current approaches derive more from consensus-based guidelines driven from concern for rapid and safe coagulopathy correction. At present, there have been no randomized studies of intervention for thrombolysis-associated intracranial hemorrhage and optimal treatment remains unknown for this relatively uncommon complication. Overall, these guidelines emphasize the high morbidity associated with warfarin-related intracranial hemorrhage and the urgency of rapid reversal. Finally, guidelines from the Australasian Society of Thrombosis and Hemostasis are somewhat more complex and provide several different tiered options based on availability of different compounds. In these guidelines, all patients should have warfarin discontinued and receive vitamin K 5-10 mg intravenously. Thus, all current guidelines emphasize the importance of rapid reversal of coagulopathy and all recommend the use of vitamin K (usually intravenously). However, the lack of clear evidence limits the ability to make stringent recommendations regarding agent and dose. Because it is associated with high risk of ongoing bleeding, death, or disability, urgent reversal of coagulopathy is of the highest priority. All protocols for warfarin-related intracranial hemorrhage emphasize immediate cessation of the anticoagulant medication and immediate administration of vitamin K (usually intravenously). Furthermore, cost and availability of these agents may limit their widespread use. Fresh frozen plasma was ordered, crossmatched, thawed and intravenous administration begun. Intracerebral hemorrhage associated with oral anticoagulant therapy: current practices and unresolved questions. Timing of fresh frozen plasma administration and rapid correction of coagulopathy in warfarin-related intracerebral hemorrhage. Hematoma growth and outcome in treated neurocritical care patients with intracerebral hemorrhage related to oral anticoagulant therapy: comparison of acute treatment strategies using vitamin K, fresh frozen plasma, and prothrombin complex concentrates. Management and prognostic features of intracerebral hemorrhage during anticoagulant therapy: a Swedish multicenter study. Pharmacology and management of the vitamin K antagonists: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines (8th Edition). Warfarin reversal: consensus guidelines, on behalf of the Australasian Society of Thrombosis and Hemostasis. Silvana Naredi 1 1 Dept of Surgical and Perioperative Sciences, Anesthesiology and Intensive Care, Umea University, Umea, Sweden 70. Red blood cell transfusion is a potentially life-saving therapy in order to replace losses in hemoglobin to maintain oxygen delivery to vital organs. The main objective of red blood cell transfusion is to increase tissue oxygenation and thereby reduce oxygen debt. After red blood cell transfusion, an increase in hemoglobin concentration is readily measured, but the effect of red blood cell transfusion on utilization of oxygen in peripheral tissue is rarely measured. Clinical studies attempting to determine the effects of red blood cell transfusion on oxygen kinetics have not provided definitive answers. Clinical studies have demonstrated an association between red blood cell transfusion and increased mortality and morbidity in general critical care patients. For the neurocritical care patient, we still lack convincing studies of effects on outcome of red blood cell transfusion. This chapter will discuss: · the normal physiology concerning red blood cells and hemoglobin. The capillary diameter is 3-8 µm, which implies that the red blood cells must possess the ability of deformation to pass the capillary network and deliver oxygen to the tissues. Oxygen is not stored in tissues and must be delivered continuously in adequate amounts for avoidance of anaerobic metabolism and production of lactate. Aerobic metabolism is the primary energy source for the brain and the brain is dependent on a continuous delivery of substrate, including glucose and oxygen. The affinity for oxygen to hemoglobin is an important factor for oxygen delivery to the tissues. For example, high altitude triggers a rise in 2,3-diphosphoglycerate concentration in red blood cells, which subsequently increases the release and availability of oxygen in tissues. Factor Effect Decrease in oxygen affinity Decrease in oxygen affinity Increase in oxygen affinity Decrease in pH Increase in temperature Decrease in 2,3-diphosphoglycerate Table 70. The uptake of oxygen in the tissue is less in the alcalotic than in the acidotic patient. A fall in 2,3-diphosphoglycerate is associated with an increased hemoglobin affinity for oxygen, resulting in less oxygen liberated to the tissues. In stored red blood cells 2,3-diphosphoglycerate is decreased within 48 hours of storage. The delivery of oxygen to a tissue increases with raised hematocrit up to a certain level. Above that level there is a net reduction in oxygen delivery most likely due to the simultaneous increase in blood viscosity. While a normal hematocrit of 35-45% is optimal in healthy individuals, it may vary in critically ill patients due to different pathophysiological conditions depending on type of illness and quality of the blood transfused (see below). In summary, the brain is dependent on a continuous delivery of oxygen in order to survive. The optimal hematocrit may vary in patients with different pathophysiological conditions. The rate of this reaction is fastest in the red blood cell by the help of carbonic anhydrase. A large fraction of the bicarbonate produced is pumped back in to plasma in exchange for chloride, Cl-. This mechanism could provide an explanation for physiological matching of blood flow to tissue oxygen levels, by mediating dilatation of blood vessels under low oxygen conditions, and constriction of blood vessels when oxygen levels are high. Hemoglobin can thus be an important factor for physiological matching of blood flow to metabolic demands. In a pathophysiological situation with increased transcapillary leakage it will, therefore, be more difficult to maintain normovolemia at a low than at a normal hematocrit. The efficacy of stored red blood cells to maintain the biological activity of red blood cells has been questioned. Transfusion of large amounts of stored red blood cells can possibly lead to adverse clinical consequences. Transfused red blood cells may be ineffective transporters of oxygen, especially in compromised critically ill patients who have microcirculatory abnormalities from a number of pathologic processes and the content of leukocytes (see below) and other inflammatory components can trigger inflammation in a compromised host. There is strong laboratory evidence suggesting that prolonged red blood cell storage may be deleterious and clinical studies have reported an association between prolonged storage and adverse clinical outcome. Loss of deformability in combination with increased interactions with vascular endothelium compromise microvascular flow. Randomized controlled trials comparing the risk of postoperative infection or short-term (three months) mortality between non-leukocyte depleted versus leukocyte depleted red blood cell transfusions have reported conflicting results. A clinical situation where randomized controlled trials clearly have revealed that the use of leukocyte depleted red blood cell transfusion reduces short-term mortality is in cardiac surgery patients. Many blood transfusion services have added universal leukocyte depletion to the routine processing of all blood components and the majority of red blood cell transfusions in Western Europe and North America are today depleted of white blood cells. Noteworthy, the published studies on harmful effects of red blood cell transfusion in critical ill patients have used mainly non-leukocyte depleted blood. In summary, storage of red blood cells can alter the biological effects negatively. Content of leukocytes in transfused red blood cells units can induce immunodysfunction. Interestingly, a well-known and world wide accepted treatment approach in severe sepsis and septic shock, i. In the treatment group 68% of the patients received red blood cell transfusion compared to 45% in the control group. The inhospital mortality in the treatment group was 31% versus 47% in the control group. This indicates that critically ill patients with severe sepsis had a lower mortality if transfused to a hematocrit of at least 30% in the presence of hypoxemia. The applicability of a restricted transfusion policy to neurocritical care patients has been questioned, given that impaired oxygen delivery is an important cause of secondary brain injury. The brain is more than any other organ depending on a continuous supply of oxygen and only moderate reductions in oxygen delivery to an injured brain could lead to cerebral hypoxia. Most of the studies concerning the level of hemoglobin and outcome after neurocritical care are prospective or retrospective cohort studies and therefore despite multivariate analysis, the relationship between red blood cell transfusion and increased adverse events may still be a result of confounding factors. There are studies that have reported an association between red blood cell transfusion and increased mortality, but it has to be taken in to consideration that the amount of blood transfused may reflect injury severity rather than the blood transfusion per se. No evidence based optimal hemoglobin level exists for patients receiving neurocritical care. Randomized controlled studies regarding the optimal hemoglobin concentration in neurocritical care patients are lacking. Few studies have investigated the effects of anemia in patients with traumatic brain injury. Retrospective studies have revealed that any period of anemia in traumatic brain injury is associated with a significant increase in morbidity and mortality, but also that red blood cell transfusion in traumatic brain injury patients, whether or not anemia is present, is an independent risk factor for complications and mortality. The results from the trial were published in New England Journal of Medicine in 1999. Thus, the liberal transfusions strategy seemed to be at least as safe as the more restrictive transfusion policy. Perhaps physiological indications of the need for red blood cell transfusion other than the hemoglobin level could be triggers for transfusion of red blood cells in the future. Recent studies have documented that red blood cell transfusion increases brain oxygenation, measured by brain tissue partial pressure of oxygen (PtiO2) catheters, in most patients with traumatic brain injury and subarachnoid hemorrhage. A limitation of these studies is that PtiO2 might not be an accurate tool to demonstrate the effect of transfusion on oxygen uptake by the tissues. Normalization of the hemoglobin level would theoretically improve the oxygen transport capacity to injured areas of the traumatized brain, in spite of limitations in this capacity in stored red blood cells. Arguments can be given that patients with a traumatic brain injury would benefit from keeping a normal hemoglobin level in order to optimize oxygen delivery to the traumatized brain. This approach has been adopted in the Lund-concept for treatment of severe traumatic brain injury, the outcome data presented with this approach is good, even though of course this can not be attributed only to the hemoglobin level. More prospective investigations are required to determine the effects of anemia and the potential benefits and optimal indications for red blood cell transfusion in patients with traumatic brain injury. The hemoglobin threshold may not be identified as the treatment goal, rather more sophisticated methods of neuromonitoring may be necessary to guide the need for red blood cell transfusion. In summary, no evidence based hemoglobin level can be recommended for patients with traumatic brain injury, but the existing data taken together support a hemoglobin level near normal, that is, a target hemoglobin value around 110 g/l. Limited oxygen delivery due to anemia, 1372 What is the Optimal Level of Hemoglobin in Neurocritical Care Patients The optimal transfusion threshold for patients suffering from non-traumatic subarachnoid hemorrhage is debatable. Anemia after subarachnoid hemorrhage has been identified as an independent predictor of infarction, death and dependency. Retrospective studies have reported that subarachnoid hemorrhage patients with higher initial and mean hemoglobin value had improved outcome. Anemia seems to be a predictor of adverse outcome in subarachnoid hemorrhage patients, even when baseline differences in clinical and radiographic severity are taken in to account. However, data suggesting an association between red blood cell transfusion and adverse outcome after subarachnoid hemorrhage have also been reported. The triple-H (hypervolemia, hypertension, hemodilution) therapy, used for treatment of cerebral vasospasm, could be one reason for anemia in patients with subarachnoid hemorrhage. It remains unclear whether anemia after subarachnoid hemorrhage reflects general illness severity or whether the treatment for anemia, red blood cell transfusion, directly contributes to poor outcome. Randomized trials that compare liberal and restrictive transfusion strategies in patients with subarachnoid hemorrhage are needed.

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