Daniel Joseph Brotman, M.D.

• Director, Hospitalist Program, The Johns Hopkins Hospital
• Professor of Medicine

https://www.hopkinsmedicine.org/profiles/results/directory/profile/0000472/daniel-brotman

Urodynamics: the appropriate modality for the investigation of frequency in treatment generic cytoxan 50 mg buy on-line, urgency medications heart disease purchase cytoxan 50 mg otc, incontinence medicine evolution buy cytoxan 50 mg with visa, and voiding difficulties medicine examples 50 mg cytoxan purchase with mastercard. Mechanism of continence and voiding medications elavil side effects order cytoxan with a mastercard, with International Continence Society classification of dysfunction. In 2009 the Fourth Consultation on Incontinence Committee on dynamic testing made the following grade B/C recommendation on the basis of the available evidencebased literature (Hosker et al. Without effective therapy, patients with these risk factors have up to an 85% chance of developing hydronephrosis, vesicoureteral reflux, and/ or urosepsis within 5 years (McGuire et al. In cases of impaired compliance in which there is compensation by a "pop-off " mechanism of vesicoureteral reflux, the impaired compliance may not be identified unless the reflux is also recognized by fluoroscopy. Other indications may include any patient who is at high risk for complicated voiding dysfunction in which an accurate diagnosis cannot otherwise be obtained. Multichannel urodynamic tests are performed with the addition of fluoroscopy, allowing simultaneous visualization of the lower urinary tract during recording of pressures. Pves, intravesical pressure; Pabd, intraabdominal pressure; Pdet, detrusor pressure; Pucp, urethral closure pressure. Radiation exposure has many known biological effects including the risk for secondary cancer (Brenner and Hall, 2007). This makes it crucial to take all possible precautions to minimize radiation exposure for both the staff and patients. The staff should wear lead protection shields and use radiation exposure monitors to track their cumulative exposure time. The number of images should be kept to a minimum and only taken for the high yield parts of the study. Modern fluoroscopy machines are equipped with the "last image hold" feature that can keep the last image frozen so the physician can use that image as a reference for next steps without the need to repeat that image. Other important features of modern fluoroscopy machines include "pulsed fluoroscopy" in which the radiation beams are emitted in intermittent pulses and a "dosespreading technique. One way to avoid this is to rotate the fluoroscope around a central area within the anatomy of interest. Furthermore, it is advisable to keep the image source away from the patient while keeping the image receptor close to her (Mahesh 2001). Technique the Video Urodynamic Lab the urodynamic room should be set up in a way that minimizes patient discomfort and anxiety. The disposables required for the procedure should be kept and organized in cabinets within the room to avoid running in and out of the room during the procedure. A C-arm is preferable over fixed fluoroscopy machines because it allows different angles of view and flexibility during patient positioning. The test is usually begun in the sitting position with the understanding that changing patient position may become necessary at certain points of the test. The first is a scout film to visualize any significant radiopaque shadows or bony abnormalities within the pelvic region. After filling is started, a second image assures appropriate positioning of the urodynamic catheter in the bladder. The next image is usually taken as continuous fluoroscopy during Valsalva and cough stress tests. This image is particularly important to assess the bladder outlet in patients with obstructive voiding symptoms. The last image is taken after the patient voids to completion to assess for any postvoid residual contrast. Additional images are taken during the test as needed such as during rises in true detrusor pressure or when low bladder compliance is noticed in order to identify any vesicoureteral reflux and/or urinary incontinence. Interpretation the scout film should be free of abnormal radiopaque shadows in the pelvic region. This film should be examined for bony lesions such as spine fracture, plates and screws, spina bifida, sacral agenesis, etc. These lesions may predispose to neuropathic disease and development of neurogenic bladder. Bony anatomic abnormalities also may contraindicate certain treatments such as sacral nerve stimulation. In patients who were previously treated for urinary incontinence, the initial fluoroscopy image may show a migrated or malpositioned Interstim lead or a radiopaque bulking agent at the bladder neck area. They also may present with difficulty emptying, which can be of bladder origin (impaired detrusor contractility) or sphincter origin (dyssynergia). During bladder filling, the cystogram should be free of filling defects, and the bladder outline should be smooth without sacculae or diverticula. The ureters should not be seen during the filling cystogram or during the voiding cystourethrogram. The bladder neck should be closed during the filling phase of the study, irregardless of patient position or activity (resting, Valsalva or cough). Deviation from these normal findings during filling cystometry may suggest bladder and/or bladder outlet pathology. Any rise in Pdet needs to be looked at closely to determine if it is simple accommodation or a true decrease in compliance. The study usually begins with a noninstrumented uroflow as described in Chapter 10. If filling is stopped and the pressure returns to baseline, then the compliance is not impaired. A number of "pop-off " mechanisms can make bladder compliance appear better than it actually is. Examples of this would be vesicoureteral reflux, which basically means bladder pressure is being transferred to the reflexing renal unit that, over time will be harmful to the upper tract. Another example is a large bladder diverticulum that may provide a protective effect on the upper tract. It may only become apparent when outlet resistance is increased, which can be demonstrated during filling cystometry by occluding the urethra. During the voiding phase, the bladder neck should be open and the urethra should be relaxed and free of strictures, diverticula, or filling defects. Furthermore, it is well-known that many women can void to completion without a significant rise in detrusor pressure. Other causes included pelvic organ prolapse, external compression, urethral diverticulum, and urethral stricture. This is because of its ability not only to capture the detrusor pressure/uroflow parameters, but also to localize the level of obstruction. If the patient has no history suggestive of neurogenic bladder, the condition is termed dysfunctional voiding. Urodynamic Findings Uroflowmetry: Patient voided 118 mL in 22 sec with a postvoid residual of 40 mL. Although the voided volume was less than 150 mL, the uroflow parameters were all within the normal range. The first sensation of bladder filling occurred at a volume of 20 mL, desire to void at 61 mL, and strong desire to void at 303 mL. Because the first sensation occurred at a very low volume, impaired bladder sensation was excluded. Urodynamic stress incontinence was demonstrated at a volume of 150 mL with a cough leak point pressure of 96 cm H2O. The filling phase of the study demonstrated a stable detrusor with normal bladder compliance. There is an increase in the intraabdominal pressure, which reflects an additional Valsalva effort during voiding. Pertinent in her medical history is a motor vehicle accident with subsequent pelvic fracture that was fixed with a plate and screws. Vaginal examination revealed urethral hypermobility, an exposed piece of the polypropylene mesh in the left vaginal sulcus, no pelvic organ prolapse, negative empty supine stress test, and no vaginal atrophy. The urethra is a little distorted, probably related to the previous pelvic fracture and/or previous sling procedure. Note the minimal rise in detrusor pressure, with a good urine flow secondary to a significant Valsalva effort. In addition, neurogenic bladder, which could have resulted from pelvic nerve damage, was ruled out. During the course of her disease, she had developed urge urinary incontinence that was complicated by paraplegia and limited mobility. On examination, the patient was wheelchairbound with an otherwise normal body habitus. Pelvic examination was unremarkable; the urethra was normal and the Foley catheter was noted to be draining clear urine. Focused neurologic examination was positive for paraplegia, with what appeared to be a normal pudendal nerve sensory distribution. The patient ultimately underwent excision of the exposed sling and insertion of a synthetic retropubic sling. Bladder compliance improved toward the end of the study after the bladder had emptied. The disease affects mostly the cervical spinal cord but can also affect the brain and other spinal cord segments. The goals of treating patients with suspected neurogenic bladder are to keep the patient dry, maintain sufficient bladder emptying, and avoid neurogenic bladder­related complications. No pressure flow study could be performed because the patient had involuntarily emptied her bladder during filling. Fluoroscopy Cystogram showed a small bladder volume, open bladder neck during filling, and leakage of contrast through the urethra. Note good flow with minimal rise in detrusor pressure and significant Valsalva effort. The patient has an indwelling Foley catheter that, when used for long periods, has known associated risks of infection, encrustation, and potential for development of bladder cancer. The indwelling urethral catheter also carries risk for urethral erosion, fistula, and worsening of leakage. A suprapubic tube could be considered as an alternative with the advantage of avoiding the urethra, but the patient may still continue to leak through the urethra. Furthermore, the suprapubic tube carries similar risks for recurrent urinary tract infection, encrustation, and bladder mucosal changes. Based on this complicated situation, different forms of urinary diversion (continent and incontinent) were discussed with the patient because this would assure tubeless drainage and hence avoid the indwelling catheter­related complications. Because she had reasonable manual dexterity, the patient elected to proceed with a continent urinary diversion. Given the small bladder capacity and right vesicoureteral reflux, bladder augmentation was concomitantly performed. Because there were also concerns about constant urethral leakage postoperatively, an obstructive rectus fascia sling was also placed. She has a history of cervical cancer treated with hysterectomy and pelvic irradiation 22 years ago. She had been tried on different antimuscarinic medications without significant improvement. Notice the rise in detrusor pressure during filling with no concomitant rise in the abdominal pressure. On examination, the patient was moderately obese and, although she was able to walk, she frequently used a wheelchair. Discussion Urinary incontinence after pelvic irradiation can have multiple etiologies. Detrusor damage and/or urethral stricture secondary to urethral fibrosis and scarring may result in urinary retention with overflow urinary incontinence. Finally, in patients who develop extensive tissue necrosis after radiation, vesicovaginal fistula may develop, resulting in severe continuous urine leakage. Also, the Interstim lead was seen in a normal position, which excludes technical factors as an explanation for failure of neuromodulation. The patient was counseled about different options and ultimately underwent a transverse colon conduit. The transverse colon was used in this case to avoid the possibly of using irradiated small bowel. Urodynamic Findings Uroflow study: this study was not done because the patient had an indwelling Foley catheter. There was also evidence of gradually increasing detrusor pressure (although of low amplitude) with filling suggesting poor bladder compliance. Case 4: Female Urethral Stricture A 49-year-old female was referred with a diagnosis of a urethral stricture with high postvoid residual volumes and symptoms of urgency and frequency. She had received multiple urethral dilations in the past in an attempt to relieve the urethral stricture. She was eventually kept on daily self-urethral calibration, noting that she could not urinate Fluoroscopy the scout film showed the Interstim lead to be in a good position. Note also the position of the Interstim lead and the leakage per urethra on the cystogram. The diagnosis of urethral stricture had been made on urethroscopy, noting urethral bleeding when an attempt was made to advance the scope through the stricture. The patient was counseled about the need for suprapubic tube insertion as a temporary measure for her urine retention. This would allow healing of the urethra and a more precise evaluation could then be performed.

Syndromes

• Pain in the shoulder area
• Fortified foods such as soymilk
• Vision or depth perception loss
• Sometimes, CT scans are used as an alternative to a regular colonoscopy. This is called a virtual colonoscopy.
• Injury
• Rheumatoid arthritis
• You should not have this procedure if you are pregnant or breast-feeding, because these conditions can affect eye measurements.
• Taking steroid medications

Patients with an incomplete transverse vaginal septum may complain of profuse vaginal discharge treatment for piles purchase 50 mg cytoxan otc, dyspareunia medicine 013 buy cytoxan american express, inability to insert a tampon treatment 34690 diagnosis 50 mg cytoxan purchase fast delivery, or tear during intercourse with resultant bleeding symptoms to pregnancy buy cytoxan uk. If asymptomatic medicine jokes order cheap cytoxan, then it may not be discovered until a routine gynecologic examination. Very rarely a transverse vaginal septum may be detected in an infant or young child. If large enough, then this mass may cause ureteral obstruction with secondary hydronephrosis. Like other müllerian anomalies, a longitudinal vaginal septum is associated with renal abnormalities, including absent kidneys, pelvic kidneys, and duplicate ureters. Some longitudinal septa will be found to be only partially obstructing, and a small opening in the septum can be found during menses with close inspection. Symptoms may vary from irregular and prolonged bleeding to profuse vaginal discharge. Occasionally, the pinpoint opening provides a pathway for organisms to access the obstructed vagina leading to pelvic infection and pyocolpos. Physical examination is unlikely to reveal a tense bulge, but a slight fullness may sometimes be appreciated in the paravaginal area. Accurate delineation of anatomy is a prerequisite for surgical excision of a noncommunicating longitudinal vaginal septum. The first step is to place a needle into the bulging vaginal wall to identify the correct plane of dissection. Notice that there is no bulge with a Valsalva maneuver that would be seen with an imperforate hymen. Manual and speculum examination provide the most important information for diagnosis of a transverse vaginal septum. If the septum is very low, then a vaginal opening may not be appreciated on evaluation of the external genitalia. A low transverse vaginal septum can usually be differentiated from an imperforate hymen by visual inspection. By increasing intra-abdominal pressure and increasing the bulge of the imperforate hymen, the Valsalva maneuver may further assist in this differentiation. If an opening to the vagina is noted, then a manual or speculum exam may reveal a higher location of the septum. A rectal exam is very helpful in detecting a hematocolpos because the bulge is readily palpable. Transperineal and transabdominal ultrasonography can sometimes diagnose and determine the thickness of a transverse vaginal septum. These patients should also be evaluated for associated anomalies, including aortic coarctation, atrial septal defects, urinary tract anomalies, and malformations of the lumbar spine. Surgical removal of a transverse vaginal septum is recommended as soon as practical after diagnosis to avoid continued retrograde menstruation. However, removal of endometriosis lesions is not recommended because relief of the obstruction leads to their spontaneous resolution. Delay in detection or treatment of a transverse vaginal septum may impair fertility secondary to irreversible pelvic adhesions, hematosalpingies, and endometriosis. In one long-term follow-up study by Rock of 19 patients with transverse septa, 47% became pregnant (1982). However, a small study in Finland by Joki-Erkkila showed a considerably higher live birth rate in women who had undergone very early diagnosis and management of their transverse vaginal septa (2003). The unfortunate consequence of very early surgical management is an increased rate of vaginal stenosis after surgical repair. This is most likely due to inconsistent use of vaginal dilators by young adolescents, which are a necessary part of treatment of a thick vaginal septum (see next paragraph). An alternative to early surgery for very young patients is medical termination of monthly endometrial shedding using depot medroxyprogesterone to postpone surgery. The young girl can be instructed to dilate the distal vagina to stretch the distal vaginal mucosa, potentially decreasing the need for a graft, and to prepare her for postoperative use of the dilator. The thickness and location of the septum will determine the best approach to surgery. Thin, low, transverse vaginal septa are much easier to repair than thick, usually high septa. Transverse septa that are thin and low in the vagina can usually be excised without difficulty. With return of thick blood through the angiocath, the plane of dissection becomes clear. In most instances, to prevent stenosis of the vagina, continual use of a mold is recommended for several weeks after surgery. The main concern is potential rectal injury; therefore, a mechanical bowel preparation or preoperative enema is recommended. During surgery, a bulge will not be seen in the presence of a thick transverse septum. The correct angle of dissection can be determined by inserting an angiocath needle into the hematocolpos under ultrasound guidance. In difficult cases, the septum can be approached transfundally via the uterus using laparoscopy or laparotomy. As the loose areolar tissue is being dissected, the rectum is frequently examined to ensure an appropriate angle of dissection. If there is inadvertent entry into the bladder or the rectum, then the procedure should be stopped and completed at a future date. After the cervix is visualized, the goal is to reapproximate the upper vaginal epithelial tissue to the lower vaginal epithelium. If a thick septum is completely incised, then the distance between the vaginal mucosa of the proximal and distal portions of the vagina may be so great that the edges cannot be reapproximated without tension. For this technique, four lower mucosal flaps are created by making oblique crossed incisions through the vaginal tissue on the perineal side of the transverse septum, taking great care to avoid injuring either the bladder or rectum. Four upper mucosal flaps are created by making oblique crossed incisions through the vaginal tissue on the hematocolpos side of the transverse septum. The upper and lower mucosal flaps are separated by sharp and blunt dissection and are sutured together at their free edges to form a continuous z-plasty. A vaginal mold must be used for 5 to 8 weeks after the procedure to avoid vaginal stenosis. If the girl is not sexually active, then a dilator should be used at night for 6 to 8 additional months. The patient should be instructed in self-examination and should return if she notices any signs of early stenosis. In cases of a thick septum in which a z-plasty technique is not used, a skin graft may be required. Anomalies of the Hymen Hymenal anomalies are derived from the incomplete degeneration of the hymen at birth. There are several variants, including imperforate, microperforate, septate, and cribiform. Imperforate hymen is the most common congenital anomaly of the female reproductive tract, occurring in 1 in 1000 women. Females present either at birth with a bulging hymen secondary to mucocolpos or at menarche with cyclic pelvic pain and hematocolpos. An imperforate hymen is sometimes discovered during a well-child check at the pediatrician. Repair of the imperforate hymen is best undertaken after the tissue has undergone estrogenic stimulation. Therefore, the ideal time is as a neonate (because of maternal estrogenic effects) or in the postpubertal/premenarchal girl. Repair of the imperforate hymen is not recommended between these times because of a lack of estrogen in the pediatric vagina. Excess tissue is excised with electrocautery to create a normal-sized orifice and the vaginal epithelium is sutured to the hymenal ring using absorbable suture. Summary Anomalies of the genitourinary tract are common, and a basic knowledge of the embryology of this system is necessary for the diagnosis and successful treatment of these patients. Because of the close embryologic development of the urinary and genital systems, patients with congenital anomalies of the genital tract must also be evaluated for anomalies of the urinary tract, such as renal anomalies. Although the first-line treatment is usually conservative management with vaginal dilation for patients with congenital absence of the vagina, surgical treatment is often required for these patients. Surgical management is often most appropriate for those with other types müllerian anomalies such as vaginal septum and imperforate hymen. The history of female genital tract malformation classifications and proposal of an updated system. Neocolpopoiesis with split-thickness skin graft as a surgical treatment of vaginal agenesis: retrospective review of 201 cases. Classifications of adnexal adhesions, distal tubal occlusion, tubal occlusion secondary to tubal ligation, tubal pregnancies, Mullerian anomalies, and intrauterine adhesions. The Vecchietti procedure for surgical treatment of vaginal agenesis: comparison of laparoscopy and laparotomy. Double uterus, blind hemivagina, and ipsilateral renal agenesis: 36 cases and long-term follow-up. Laparoscopic creation of a neovagina in patients with Rokitansky syndrome: analysis of 52 cases. The bicycle seat stool in the treatment of vaginal agenesis and stenosis: a preliminary report. Presenting and long-term clinical implications and fecundity in females with obstructing vaginal malformations. Laparoscopic-assisted Vecchietti procedure for creation of a neovagina: an analysis of five cases. McIndoe procedure for vaginal agenesis: long-term outcome and effect on quality of life. The versatility of the pudendal thigh fasciocutaneous flap used as an island flap. Vaginoplasty with interceed absorbable adhesion barrier for complete squamous epithelialization in vaginal agenesis. Vaginoplasty using autologous in vitro cultured vaginal tissue in a patient with Mayer­von­Rokitansky­Kuster­Hauser syndrome. Congenital absence of the uterus and vagina is not commonly transmitted as a dominant genetic trait: outcomes of surrogate pregnancies. Pregnancy success following surgical correction of imperforate hymen and complete transverse vaginal septum. Prevalence and diagnosis of congenital uterine anomalies in women with reproductive failure: a critical appraisal. Results of modified laparoscopically assisted neovaginoplasty in 18 patients with congenital absence of vagina. The Vecchietti operation for constructing a neovagina: indications, instrumentation, and techniques. A new technique of vaginal reconstruction using neurovascular pudendal-thigh flaps: a preliminary report. Walters Introduction the two functions of the lower urinary tract are the storage of urine within the bladder and the timely expulsion of urine from the urethra. The precise neurologic pathways and neurophysiologic mechanisms that control these functions of storage and micturition are complex and not completely understood, with many of these pathways adapted from animal models. Until recently, neural pathways were thought to be static with little opportunity for change. However, an extremely important concept, appreciated for its application to treatment of lower urinary tract dysfunction, is the principle of neuroplasticity as it applies to the pathways and mechanisms. The largest, myelinated, fast-conducting A alpha nerves are sensory (afferent) nerves conveying touch, or motor (efferent) nerves activating large muscles. The smallest, nonmyelinated C nerve fibers are slow-conducting nerves that convey pain and temperature on the sensory side or act as postganglionic autonomic nerves on the motor side. The bladder afferent nerves are largely C fibers at birth, until maturation changes the afferents to A delta (lightly myelinated, small) fibers. Understanding the anatomy and physiology of the basic reflex pathways and central voluntary control involved in lower urinary tract function is necessary, but appreciating the dynamic ability of the neurons to modify these pathways is essential to the application of modern therapies. This chapter reviews normal and abnormal function, neurologic control, and clinical pharmacology of the lower urinary tract in women. A neuron propagates a signal, the "action potential," along an axon and then transmits the signal to another neuron or an end organ to elicit a response. The neural propagation depends on electrical events, with channels allowing ions to move through the cell membrane that depolarizes the membrane and establishes electrical current (saltatory conduction in myelinated nerves) that conveys action potentials to the junctions of the nerve with another nerve or with end organs. At this site, chemical events that depend on neurotransmitters and receptors affect action potentials in the second nerve or end organ to elicit the response. Neurotransmitters are chemicals, selectively released from a nerve terminal by an action potential, that interact with a specific receptor on an adjacent structure and elicit a specific physiologic response. The chemical event at the junction gives origin to further electrical events in the secondary neurons or in the end organs. These chemical synapses can be excitatory (Na+ channels open, and Na+ influx depolarizes and creates action potentials) or inhibitory (Cl- and K+ channels allow influx and egress, and hyperpolarization develops, preventing action potential development). Within the brain and spinal cord, nerve cell bodies are arranged in groups of various sizes and shapes called nuclei. Fibers with a common origin and destination are called a tract; some are so anatomically distinct that they may be called fasciculus, brachium, peduncle, column, or lemniscus. Twelve pairs of cranial and 31 pairs of spinal nerves with their ganglia compose the peripheral nervous system. Synaptic relationships in the peripheral nervous system involve only neuron­neuron or neuron­effector interactions. The somatic component of the peripheral system innervates skeletal muscle and receives somatic sensory input. The autonomic division innervates cardiac muscle, smooth muscle, and glands; is involved with ganglionic activities; and is indirectly involved in conveying visceral afferent input.

It is essential that the insurance company have the proper database linkage between each of the providers and their various business or billing addresses symptoms diarrhea order cheap cytoxan on line. Work done there was billed by that clinic medicine logo cheap cytoxan express, and reimbursement was sent to them at their business address treatment spinal stenosis discount cytoxan amex. You will need to be explicit with insurance companies abro oil treatment buy cytoxan 50 mg mastercard, both at the time of pre-authorization 247 medications buy cytoxan 50 mg lowest price, as well as during billing and collection phases, especially if you are expanding into private practice after being institution based. Also, recognize these companies need to have both or all of your addresses listed in their database, with notations that there is more than one billing address for you as a provider. You must contact them directly, preferably in writing and with a follow-up phone call or email, to confirm. In similar fashion, your contract neuropsychologists need to alert all companies by whom they are reimbursed that these psychologists are now employed by two separate companies who may bill for their work: their own solo private practice and, now, your practice. To establish a fair hourly rate of pay for the contract neuropsychologists, I calculated my average collection rate then calculated the average amount of my time and specific overhead involved in setting up these appointments. If these neuropsychologists wished to use a psychometrist, I made those arrangements as well. It is absolutely worth your time and the added expense of an accountant to do so (see Appendix L for a listing of possible deductions). With any luck, you will become meticulous and thoughtful as you plan your travel time, conference time, expenses, purchases for the business, and, if appropriate, the expenses of a home office. You should speak to an accountant, and if needed, an attorney, about the advantages, requirements and limitations of a sole proprietorship, of a partnership, or of incorporation. You may decide to start out as a sole proprietor, and 74 Successful Practice in Neuropsychology and Neuro-Rehabilitation later decide to form a corporation. Sound legal and fiscal advice is important in this process, and later, for appropriate preparation of tax returns. What teaching, contract, or other supplemental sources of income do you have, in addition to revenue generated each month from your private practice Run the numbers, in each area, and see if there are ways to further reduce your fixed expenses, at least for the first year. Although one hopes the judge will be as fair-minded as possible within the constraints of the law, keep in mind that the attorneys involved are not expected to be neutral or fair. They are not hired as advocates of what we may consider objectively reasonable neuropsychological truths, nor are they clinical advocates. Attorneys are typically paid a substantial percentage of a settlement they collect, or they are paid salaries or hourly fees from the companies or individuals who employ them. The attorneys and their clients are generally not interested in data that do not support their positions, other than to understand the ways in which those data might hurt their position, if the data do not support their claims. A good attorney may be interested to know what is likely to be helpful to ´ assist his/her client vis-a-vis treatment they could pursue now and/or after the case is settled. Those attorneys will often encourage their clients to pursue appropriate help and to try and reestablish an improved quality of life postinjury to the fullest extent possible. Unlike the typical clinical circumstance, your conclusions now regarding possible deficits and their implications for function in day-to-day life are likely to have a direct bearing on large amounts of money being lost by one side or gained by another. As a result, the patient and his representatives or the defendants and their representatives may bring significant pressure to bear upon you to view or present your data with particular emphases. This pressure and the accompanying adversarial process that may ensue can be unpleasant. I encourage you to charge fees that compensate you for both the level of stress you may encounter (to use a military analogy, consider these fees a form of "combat pay") as well as for the value of your work. Your honestly derived perspectives may, at times, reflect clinical realities that have clear room for legitimate differences of opinion. But in the harsh light of the courtroom, you will be asked to speak in terms of probabilities, not possibilities. In doing so, you may not feel able to adequately support your conclusions without negating or minimizing other valid viewpoints. The pressure to render possibilities into probabilities can sometimes be very subtle. It may even become an appealing consideration in the hands of a charming, articulate, and passionate attorney. Ministers, attorneys, and some psychologists share a certain set of personality tendencies-to rely heavily on verbal and emotional powers of persuasion, to delight in the well-turned phrase, to dazzle with complex conclusions that can be hammered into clarity, and then press the point home. If it does, you may be particularly vulnerable to getting swept up in the drama of it all. You may need to be careful about falling prey to the kind of swashbuckling advocacy or scorn that sometimes masquerades as professionally appropriate testimony. If a significant portion of your salary depends upon deposition work or courtroom testimony, which ultimately translates into helping attorneys win their cases, you may find it increasingly difficult over time to be fully open-minded and objective. However, it becomes a problem when what may have been a well-founded conclusion in one case, in the context of what was known about the particular person, diagnosis and medical and neuropsychological features at that point in time, is extended to all other cases of that diagnostic group. When the expert has, by their scientific support of what turned out to be a defense-friendly or plaintiff-friendly opinion, now found themselves in demand as an expert witness in similar cases, it is likely that they will almost always be hired to support that one side of the argument. This may be so even with further research findings or additional clinical information that contravenes or modifies the original conclusions. It is easy to understand how this can happen for any of us, if our livelihood and reputation in the circles we value support our views. All of the contingencies rack up on the side of continued belief of the original opinion, which is further supported by money, cases, and prestige as an expert on a particular viewpoint. If an appropriately updated and modified opinion renders your testimony more neutral, if your opinions become less absolute. The legal world is the world of absolutes, not the world of conditional responses. Next consider how such an informed change in your beliefs and testimony might affect your desirability as an expert witness or medical­legal consultant When those worlds truly intersect, something good and useful may occur, supported by the scientific facts as we know them. In those circumstances, it is difficult to avoid some small particle of defensiveness about your opinions. In addition to guarding against defensiveness, legal work can be risky on several levels. But probably most dangerous for the scientist­practitioner, legal work as an expert witness can begin to limit your ability to form objective opinions. This vulnerability is not likely to result from a conscious decision on your part to take a particular position, "independent of the facts. You tend either to believe or to doubt the clinical presentation consistent with your bias. For example: repeated exposure to patients whose injuries do not limit their ability to return to work but who prefer not to work ever again, or contact with attorneys or other clinicians or family members with questionable ethics, or when confronted with insurance companies whose intent is to completely minimize rather than acknowledge the actual extent of an injury, one can develop a jaded outlook. It is at these exact times when the spirit of scientific inquiry and steadiness is needed instead. Entering into the forensic world of smoke and mirrors inevitably alters your view of the proceedings and your role in them. Nonscientific or nonclinical influences that are part of colorful courtroom theater may begin to exert greater distortion on your opinions than the quiet and less colorful observations that result from scientific research and clinical observation. It does mean that you must develop increased vigilance to limit the effects of these problems upon your professional judgments. For some of those individuals, it is unfortunately true that when we see or hear their names, we can almost always predict which side of an argument they will be taking. We can probably even list their arguments and their conclusions, prior to seeing any of their evaluation findings. This phenomenon is not a healthy development for neuropsychology nor for any scientifically based field. In all fairness to people who usually find themselves as plaintiff experts, or as defense experts, their institutional context must be taken into account. For example, if you are a neuropsychologist in a tertiary care setting, where patients are routinely sent for second or third opinions, you are likely to find yourself doing a preponderance of defense work. Often the person requesting a second opinion may feel the problems or their long-term implications were overstated in the initial report. Or, they simply want to ensure that two reasonable experts agree on the major issues. Many of these cases may eventually go to trial as a result of the accident that caused the injuries. These situations are challenging by their nature for the practitioners involved, both with their heavy daily time commitment to taking care of patients and yet now boxes full of records to review and major differences of opinion to address and integrate. Someone will be unhappy with your conclusions, and every time, one of the patients will be adversely affected financially. Not infrequently, these patients are involved in lawsuits seeking money for damages related to their accidents. This may be because, in part, increased clinical and scientific knowledge has accumulated regarding mild residual neuropsychological effects that at-risk concussion patients may suffer. Some of these patients have a history 80 Successful Practice in Neuropsychology and Neuro-Rehabilitation of multiple prior concussions or a prior more serious brain injury. Others have other health risk factors, such as diabetes or prior mild subcortical vascular changes that may increase their risk of mild acquired adverse effects after a documented concussion. Some of these patients, in the context of brief or no loss of consciousness, have sustained a more serious mild injury, i. Some of these patients have not actually sustained any kind of concussion, but have non-neurologic reasons for persisting symptoms. In none of these cases, whether mild with no complications, mild with complications, or no injury with psychological complications, is the person rendered permanently incapable of regular full-time employment. However, the willingness of some psychologists to testify about the presence of serious brain damage and inability to work in patients for whom non-neurologic factors play a primary role has likely added to the increased frequency of litigation for mild postconcussive injuries. The literature on the role of litigation in recovery and return to work after possible or actual concussive injuries is somewhat mixed. In the individual clinical case, when patients appear to be functioning far worse than one would predict on the basis of their injuries, it seems that application of W. Doing forensic work provides an interesting opportunity to learn more about how other professionals conduct their evaluations and present their findings. This is true not only for other neuropsychologists, but also seeing how other professionals conduct their workups, including emergency room Medical­Legal Work Chapter 8 81 physicians and staff, neurosurgeons and neurologists, psychiatrists, vocational rehabilitation counselors, life care planners, and speech pathologists. You will have the opportunity to learn the details of a thorough exam, as well as to appreciate how subtle errors or omissions may occur. It is always instructive to discover how other neuropsychologists conduct their evaluations and present their findings. You may discover aspects of report formats that you decide to include in your own reports. You will then be better prepared to guard against these problems in your own evaluations, analyses, reports, and testimony. You may or may not agree after you have considered the critique, but you will have learned by your openness to it. In most clinical situations, there is little time or opportunity for feedback from our peers. However, in a forensic case, experts on the other side are looking for deficits in your neuropsychological arguments. Often, they are not nice about how they express this, but their enthusiastic approach has the potential to lead to refinements in your future work if you accept the opportunity. Participating wholeheartedly in an adversarial atmosphere may be entertaining or even briefly satisfying at the time, but it is ultimately demeaning to the profession of neuropsychology, and to its representatives-us. You are not limited to a brief or modified battery as you might otherwise be in a clinical circumstance of limited time or funding. Instead, you may enjoy this opportunity, for example, to compare a range of appropriate memory tests, while also directly serving the intent of the evaluation. In the process of forensic work, and the subsequent research on test statistics, we also have the opportunity to learn more about a range of patients and the meaningfulness of particular test scores and parameters. For example, Prigatano and Amin (1993) in their paper on the Hiscock Digit Memory Test challenged the assumption that chance levels of responding were 82 Successful Practice in Neuropsychology and Neuro-Rehabilitation required to conclude that non-neurologic factors were operating in test performance. The patients with documented severe brain injury or disease achieved close to 100% correct on this exam. The mildly injured litigating patients were more likely to achieve percentiles in the low- to mid-90s. Without a comparison group of neuropsychological test scores from both mildly injured patients in litigation and more severely brain damaged patients, an extremely useful shift in our understanding of chance levels of responding may not have been so clearly seen. The sheer amount of time spent by you or your staff on the phone, submitting documents to justify testing, asking the primary care provider to send in a letter of support, and so on, is mercifully avoided. College, graduate school, practicum experiences, a year-long internship, and 1­2 years of postdoctoral study constitutes a significant amount of time, energy, effort, dedication, and sacrifice. It is satisfying to know a lot about something as vital as the human brain and mind and to be in demand for your skills. Usually, your peers are working as relentlessly as you are, and while focused on patient care or paying the office rent no one has time to think about each other. Forensic work can provide a more public forum for you to demonstrate your talents and to achieve recognition. For most of us, unless we have been arrested or sued, we are not going to get much exposure to judicial proceedings. Perhaps I am mistaken, but it is my impression that psychologists are rarely selected for jury duty. You may even learn to develop a greater sense of perspective and increased maturity in the process. Spine-Firming Exercises Repeat the following words of wisdom prior to testifying: 1. I will remain focused on the primary issues and not be distracted by obfuscating and unrelated discussions with the attorney.

The foot also contains numerous smaller muscles that act to flex and extend the toes treatment 4s syndrome discount cytoxan 50 mg buy on-line. This primarily occurs because exercise stimulates slow-twitch fibers to produce more mitochondria and glycogen; the blood supply to these fibers also improves medications drugs prescription drugs purchase cytoxan from india. Exercise affects more than muscle fibers: it strengthens bones medicine questions order generic cytoxan on line, improves the oxygen-carrying capacity of the blood by increasing the number of red blood cells treatment brachioradial pruritus order cytoxan toronto, and enhances the function of the cardiovascular medicine 50 years ago cytoxan 50 mg purchase free shipping, respiratory, and nervous systems. Increased muscle strength requires resistance exercise, such as weight lifting, that involves the contraction of muscles against a load that resists movement. This action stimulates muscle fibers to synthesize more myofilaments and the myofibrils grow thicker and increase in number. Because endurance and resistance exercise produces different results, an optimal exercise program should include both types of training. The prefix bi- in a muscle name, such as in biceps brachii, refers to the fact that the muscle: a. During the process of muscle contraction, the sarcoplasmic reticulum is stimulated to release which substance Which muscle is often called the "praying muscle" because of its role in flexing the head Myofibrils, which consist of myofilaments, fill the sarcoplasm of the muscle fiber. None of the other answers are correct: the actin does not pull on the myosin; neither the myosin nor the actin myofilaments shorten; the sarcomere shortens, but its shortening does not pull the actin and myosin myofilaments toward the center of the sarcomere; the Z-discs are pulled closer together, but the cause of this is the pulling of the actin myofilament by the myosin myofilament. Incomplete tetanus occurs when subsequent contractions build on the force of a previous contraction. If creatine phosphate is depleted before the supply of oxygen has reached an acceptable level, muscles begin to metabolize glucose. The origin refers to the end of the muscle that attaches to the more stationary bone. A tendon is a strong fibrous cord that results when the epimysium extends past the muscle. Acetylcholine is a neurotransmitter that stimulates the receptors in the sarcolemma. The trapezius muscle extends the head, such as when looking upward, and elevates the shoulder; the temporalis aids in closing the jaw; the buccinator assists in smiling and blowing (such as blowing air into a trumpet). The sartorius aids in flexion of the hip and knee (such as when sitting cross-legged). Myosin and actin myofilaments form cross bridges, and the actin pulls the myosin myofilament toward the center of the sarcomere. After forming cross bridges with the actin myofilament, the myosin myofilament propels the actin myofilament toward the center of the sarcomere. The sarcomere shortens, pulling the actin and myosin myofilaments toward the center, which pulls the Z-discs closer together. A continuous state of partial muscle contraction in which muscles are at their optimal resting length is called: a. Name the two types of cells that make up the nervous system and describe the function of each. Explain the process of impulse conduction in both myelinated and unmyelinated nerve fibers. List the 12 cranial nerve, using name and number and identify the functions of each. Identify the differences in structure and function between the sympathetic and parasympathetic divisions of the autonomic nervous system. Even an act as simple as eating lunch requires input from multiple body systems, including the endocrine system (which senses a drop in blood glucose levels and triggers the sensation of hunger), the muscular system (which allows you to chew your food), and the digestive system (which processes the food and eliminates the waste). The nervous system coordinates these systems so each knows exactly what to do and when to do it. The nervous system-consisting of the brain, spinal cord, and nerves-constantly receives signals about changes within the body as well the external environment. It then processes the information, decides what action needs to occur, and sends electrical and chemical signals to the cells, telling them how to respond. The nervous system also powers our ability to learn, feel, create, and experience emotion. The body has two organ systems dedicated to coordinating the activities of the trillions of cells making up the human form. One of those systems-the endocrine system-employs chemical messengers called hormones to communicate with cells. In contrast, the nervous system uses electrical signals to transmit messages at lightning speed. Overview of the Nervous System Sensing the nervous system uses sense organs and nerve endings to detect changes both inside and outside the body. Ganglia the peripheral nervous system consists of the vast network of nerves throughout the body. In brief, the peripheral nervous system consists of everything outside of the brain and spinal cord. Neurons are the excitable, impulse-conducting cells that perform the work of the nervous system, while neuroglia protect the neurons. Underscoring the importance of neuroglia is the fact that the nervous system contains about 50 glial cells for each neuron. Schwann cells are found in the peripheral nervous system; all the rest reside in the central nervous system. This arrangement allows the astrocyte to funnel glucose from the bloodstream to the neuron for nourishment. However, it also prevents most medications from reaching brain tissue, making treating disorders of the brain challenging. While this allows them to replace worn-out or damaged cells, it also makes them susceptible to tumor formation. There are three classes of neurons: sensory (afferent) neurons, interneurons, and motor (efferent) neurons. Each neuron type fulfills one of the three general functions of the nervous system. Besides receiving, processing, and storing information, the connections made by these neurons make each of us unique in how we think, feel, and act. Dendrite Multipolar neurons Multipolar neurons have one axon and multiple dendrites. This is the most common type of neuron and includes most neurons of the brain and spinal cord. Axon branch Dendrite Bipolar neurons Bipolar neurons have two processes: an axon and a dendrite with the cell body in between the two processes. These neurons can be found in the retina of the eye and olfactory nerve in the nose. These neurons mostly reside in the sensory nerves of the peripheral nervous system. In general, though, neurons have three basic parts: a cell body and two extensions called an axon and a dendrite. The cell body (also called the soma) is the control center of the neuron and contains the nucleus. Dendrites, which look like the bare branches of a tree, receive signals from other neurons and conduct the information to the cell body. Nucleus the axon, which carries nerve signals away from the cell body, is longer than the dendrites and contains few branches. Nerve cells have only one axon; however, the length of the fiber can range from a few millimeters to as much as a meter. The end of the axon branches extensively, with each axon terminal ending in a synaptic knob. However, because myelin helps speed impulse conduction, unmyelinated fibers conduct nerve impulses more slowly. In contrast, nerve fibers stimulating skeletal muscles, where speed is more important, are myelinated. In the peripheral nervous system, the myelin sheath is formed when Schwann cells wrap themselves around the axon, laying down multiple layers of cell membrane. The nucleus and most of the cytoplasm of the Schwann cell are located in the outermost layer. This outer layer, called the neurilemma, is essential for an injured nerve to regenerate. Unlike Schwann cells-which wrap themselves completely around one axon-one oligodendrocyte forms the myelin sheath for several axons. Specifically, the nucleus of the cell is located away from the myelin sheath and outward projections from the cell wrap around the axons of nearby nerves. This explains why paralysis resulting from a severed spinal cord is currently permanent, although researchers continue to explore possible solutions. Nerves in the peripheral nervous system can regenerate as long as the soma and neurilemma are intact. Because nerves in the central nervous system lack a neurilemma, they cannot regenerate. When a nerve fiber is cut, the distal portion of the axon is separated from its source of nutrition. Consequently, it begins to degenerate along with the myelin sheath and Schwann cells. At the same time, the neurilemma forms a tunnel near the site of the injury; new Schwann cells grow within the tunnel. New Schwann cells Regeneration tunnel When one of the new growth processes finds its way into the tunnel, it begins to grow rapidly (3 to 5 mm/day). Another method currently being researched is the use of synthetic guidance channels to help direct newly growing axons. The channels may be implanted empty, or they may be filled with growth factors or neural cells. Signal transmission occurs through an electrical current, which, like all electrical currents, results from the flow of charged particles from one point to another. In the body, whenever ions with opposite electrical charges are separated by a membrane, the potential exists for them to move toward one another (depending, of course, upon the permeability of the membrane). A membrane that exhibits membrane potential-an excess of positive ions on one side of the membrane and an excess of negative ions on the other side-is said to be polarized. The outside of the cell is rich with sodium ions (Na) while the inside contains an abundance of potassium ions (K). The interior of the cell contains other ions as well, particularly large, negatively charged proteins and nucleic acids. However, the sodium-potassium pump constantly works to restore the ions to the appropriate side. The neuron is resting, but it has the potential to react if a stimulus comes along. This creates an action potential, meaning that the neuron has become active as it conducts an impulse along the axon. The action potential continues down the axon as one segment stimulates the segment next to it. K+ + ­ ­ + + ­ ­ + K+ + ­ ­ + + ­ ­ + ­ + + ­ ­ + + ­ ­ + Na+ + ­ + ­ ­ + ­ + + ­ 4 Repolarization · K flows out of cell · Electrical balance restored: interior has negative charge and exterior has positive charge Meanwhile, the sudden influx of Na triggers the opening of other channels to allow K to flow out of the cell. Soon after K begins to exit, the Na channels shut to prevent any more Na from flowing into the cell. This repolarizes the cell; however, Na and K are now flip-flopped, with the outside containing more K and the inside containing more Na. When this is completed, the nerve is again polarized and in resting potential until it receives another stimulus. When a stimulus reaches a threshold and depolarizes the neuron, the neuron fires at its maximum voltage. In this way, as each neuron segment triggers firing in the segment next to it, the nerve impulse continues at the same strength all the way to the synaptic knobs. In myelinated fibers, however, the thick layer of myelin encasing the axons of most nerve fibers blocks the free movement of ions across the cell membrane. The only place ion exchange can occur is at the nodes of Ranvier: the evenly spaced gaps in myelin. The following illustration shows how a nerve impulse travels down a myelinated fiber. The current flows under the myelin sheath to the next node, where it triggers another action potential. Because the action potentials occur only at the nodes, the impulse seems to "leap" from node to node. These changes disrupt nerve conduction and cause symptoms that vary, depending upon which nerves are affected. Common symptoms include visual disturbances (such as blindness or double vision), weakness, loss of coordination, and speech disturbances. The disease progresses over many years; symptoms typically improve and then worsen in unpredictable cycles. For this to happen, the impulse must have some way of transferring from one neuron to the next. Some synapses (such as those between cardiac muscle cells and certain types of smooth tissue cells) are electrical. In these instances, adjacent neurons touch, which allows an action potential to pass smoothly from one neuron to the next. Instead, a chemical called a neurotransmitter bridges a very narrow gap (the synaptic cleft) to carry the message from the first neuron (the presynaptic neuron) to the next (the postsynaptic neuron). Ca2+ Na+ the specific neurotransmitter determines whether the impulse continues (called excitation) or whether it is stopped (called inhibition). If the neurotransmitter is excitatory-as shown here-Na channels open, the membrane becomes depolarized, and the impulse continues.

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