Deep brain stimulation: a new treatment for Parkinson's disease

Patients suffering from advanced Parkinson's disease (PD) often experience an array of symptoms that greatly affect their quality of life. Deep brain stimulation (DBS) of the bilateral subthalamic nuclei (STN) has produced remarkable improvements in people with advanced PD whose symptoms are not adequately controlled with medication. We present a case report on a patient who has benefitted immensely from bilateral STN stimulation. Levodopa responsiveness, disabling motor fluctuations and dyskinesias, cognition, and concurrent illness are major factors in identifying candidates who will receive the greatest benefit.

Successful treatment of childhood spasticity secondary to cerebral palsy using Botox

Spasticity resulting from cerebral palsy can reduce the quality of life in affected children and can eventually cause more severe impairments, such as joint dislocation and scoliosis. Botulinum toxin type A (Botox) is widely used to temporarily alleviate the increased muscle tone associated with spasticity, and when combined with a comprehensive physical therapy regimen can result in permanent improvement. This report documents the successful use of Botox over a two-year period to treat spasticity secondary to cerebral palsy in a preschool-age child. Botox was used in conjunction with a specific physical therapy regimen in order to reach a functional goal of independent ambulation.

Thalamotomy, DBS-Vim, and DBS-GPi for generalized dystonia: a case report

Generalized dystonia is a disabling disorder that can severely affect quality of life. Pharmacological treatment is unsatisfactory, and surgical therapy has been the focus for symptom improvement. We present the first case report of a patient with disabling generalized dystonia treated with a thalamotomy and deep brain stimulation of the thalamus and globus pallidus (DBS-Vim, DBS-GPi). His tremor and dystonic symptoms have dramatically improved through combining these surgical interventions.

Bilateral globus pallidus internus deep brain stimulation therapy for primary generalized dystonia

Primary generalized dystonia (PGD) associated with the early-onset generalized dystonia gene (DYT1) can cause severe disability, compromising an individual's ability to perform activities of daily living. Pharmacological treatment has been inadequate in alleviating the motor dysfunctions. Deep brain stimulation of the bilateral globus pallidus internus (DBS B-GPi) has been documented to reduce these debilitating motor abnormalities. This report details the successful treatment of a DYT1-positive 13 year-old boy suffering from PGD.

Dystonia and unique muscle features. A 23-year follow-up and correction of diagnosis in two brothers

OBJECTIVE

To provide follow-up information and a corrected diagnosis on two brothers who were primarily described in the ARCHIVES in 1971 as having had a genetic dystonia with unusual muscle biopsy features.

MEASURES

Clinical observation of response to treatment and muscle histologic findings.

RESULTS

These brothers are an unusual example of dopa-responsive dystonia that was present since birth. The muscle histopathologic features were caused by an abnormal cerebral influence on the developing motor unit and were not a primary abnormality. A repeated muscle biopsy performed 1 year after treatment continued to show the same pattern of fiber-type abnormalities.

CONCLUSIONS

Dopa-responsive dystonia can be present from birth or early infancy. The response to levodopa is excellent even after a delay in treatment of more than 20 years. Intrauterine dystonia can cause a predominance of small type 2 fibers. A trial of levodopa/carbidopa is indicated in all patients with a childhood-onset dystonia or gait disturbance.

Classification of tremor and update on treatment

Tremor is a symptom of many disorders, including Parkinson's disease, essential tremor, orthostatic tremor, cerebellar disease, peripheral neuropathy and alcohol withdrawal. Tremors may be classified as postural, rest or action tremors. Symptomatic treatment is tailored to the tremor type. Combination therapy with carbidopa and levodopa remains the first-line approach for parkinsonian tremor. Essential tremor may be amenable to propranolol or primidone. Propranolol may be useful in treating alcohol withdrawal tremor, and isoniazid may control the cerebellar tremor associated with multiple sclerosis. Clonazepam may relieve orthostatic tremor. Other agents are also available for the treatment of tremor. When medical therapy fails to control the tremor, surgical options such as thalamotomy, pallidotomy and thalamic stimulation should be considered in severe cases. Thalamic stimulation, the most recent of these surgical approaches, offers the advantage over ablative procedures of alleviating tremor without the creation of a permanent lesion.

Osteogenic potential of laser modified and conditioned titanium zirconium surfaces

Statement of Problem:

The osseointegration of dental implant is related to their composition and surface treatment. Titanium zirconium (TiZr) has been introduced as an alternative to the commercially pure titanium and its alloys as dental implant material, which is attributed to its superior mechanical and biological properties. Surface treatments of TiZr have been introduced to enhance their osseointegration ability; however, reliable, easy to use surface modification technique has not been established.

Purpose:

The purpose of this study was to evaluate and compare the effect of neodymium-doped yttrium aluminum garnet (Nd-YAG) laser surface treatment of TiZr implant alloy on their osteogenic potential.

Materials and Methods:

Twenty disc-shaped samples of 5 mm diameter and 2 mm height were milled from the TiZr alloy ingot. The polished discs were ultrasonically cleaned in distilled water. Ten samples each were randomly selected as Group A control samples and Group B consisted of Nd-YAG laser surface etched and conditioned test samples. These were evaluated for cellular response. Cellular adhesion and proliferation were quantified, and the results were statistically analyzed using nonparametric analysis. Cellular morphology was observed using electron and epiflurosence microscopy.

Results:

Nd-YAG laser surface modified and conditioned TiZr samples increased the osteogenic potential.

Conclusion:

Nd-YAG laser surface modification of TiZr, improves the cellular activity, surface roughness, and wettability, thereby increasing the osteogenic potential.

The cost of medical education in an ambulatory neurology clinic

Decreased revenue from clinical services has required academic hospitals and physicians to improve productivity. Medical student education may be a significant hindrance to increased productivity and income. This study quantifies the amount of time spent by faculty members teaching medical students in an ambulatory neurology clinic as well as the amount of time students occupied rooms when seeing patients on their own. Over a three-week period in an ambulatory neurology clinic, an observer noted these quantities of time, and the opportunity costs of both amounts of time were determined. Attending physicians spent an average of 19.6 minutes per medical student per half-day teaching, which translates to an average cost of $20.78 per half-day clinic. Students spent an average of 49.9 minutes per half-day seeing patients in the absence of an attending physician, an opportunity cost to the clinic of $142.50 per student per half-day.

Depression and intelligence in patients with Parkinson's disease and deep-brain stimulation

The goal of this study is to examine the association of depression with intelligence and education in patients with Parkinson's disease treated with bilateral subthalamic nucleus stimulation (STN-DBS). The literature has been contradictory concerning depression in Parkinson's disease patients. Some studies have shown less depression in Parkinson's disease patients with more education not treated with STN-DBS. Other recently published studies indicate that STN-DBS improves the depression associated with Parkinson's disease. No studies have examined the correlation of these factors with depression in Parkinson's disease patients treated with STN-DBS. We administered the Beck Depression Inventory (BDI) pre- and postoperatively to 21 Parkinson's disease patients (seven women, 14 men, ages 49-75) who underwent STN-DBS. The postoperative scores of the lower 50th percentile (n=8) of the Verbal Comprehensive Index of the Wechsler Adult Intelligence Scale (WAIS-III) decreased significantly (P=0.036), while the upper 50th percentile (n=13) remained nearly constant (P=0.802). Furthermore, as the education increased from highschool to graduate level, patients demonstrated less improvement in depressive symptoms postoperatively. These findings suggest that Parkinson's disease patients with lower intelligence test scores and less education benefit more with regards to depressive symptomatology after STN-DBS than patients with higher scores and education.

Difficulty in securing treatment for degenerative hip disease in a patient with Down syndrome: the gap remains open

In 2002, the office of the U.S. surgeon general published a report detailing the discrepancies between the quality of healthcare afforded to persons with and without mental retardation. This article examines the case of a female resident of a developmental center with profound mental retardation due to Down syndrome and degenerative hip disease. Although she was in urgent need of a total hip replacement, the operation was denied or delayed by several different surgeons. Using a survey of physician attitudes, we examine several possible motivations behind the surgeons' reluctance to perform the procedure and conclude that these reasons were not appropriate in this case. Finally, we reiterate the surgeon general's call to eradicate preconceptions held in the medical community about the population of persons with mental retardation that result in similar failures to provide adequate care.

Utilization management and physician burnout

OBJECTIVE

This study was designed to assess physician experiences with utilization management and burnout and investigate whether they are linked.

STUDY DESIGN

We conducted an electronic survey with items related to demographics, profession, utilization management, burnout, and potential policy solutions.

METHODS

The survey was sent to 7222 physicians working in outpatient settings who were recruited from a large, opt-in database. Outcome measures were responses to categorical and Likert-style survey items related to demographics, utilization management, burnout, and potential policy solutions.

RESULTS

Of 7222 requests sent, 501 physicians completed the survey and were included in the final data set (77% men; mean [SD] age, 57 [9.8] years; mean [SD] years in practice, 24 [8.9]). Of these, 200 were general practitioners and 301 were nonhospital specialists. Physicians indicated that utilization management procedures for prior authorization (81%), step therapy (79%), and nonmedical switching (69%) were major or significant barriers to their clinical and patient care. More than half (52%) reported spending 6 to 21 or more hours per week on paperwork related to health insurance utilization management, 67% had experienced burnout at some point in their careers, and 64% indicated that utilization management had been a contributing factor to feelings of burnout, with an additional 8% citing it as the main factor. Physicians favored streamlining prior authorization practice (77%), requiring step therapy to be based on science (73%), and ensuring that peer-to-peer reviews are done by qualified medical experts (67%).

CONCLUSION

These findings indicate that utilization management has a detrimental impact on physicians and patient care and contributes to physician burnout.