Biomedical subjects

W C Walker

Publications and source records attributed to W C Walker.

At least 19 recordsLinked to original sources

PubMed2001

Relation of electromyography-induced pain to type of recording electrodes.

Pain is an important consideration in the performance of needle electromyography (EMG). Prior investigations have suggested that pain is greater with a concentric needle electrode (CNE) than monopolar needle electrode (MNE). This prospective randomized study tested this hypothesis using improved methodology and disposable rather than reusable needle electrodes. Ninety consecutive outpatients were enrolled and randomized to CNE (diameter = 0.46 mm) or MNE (diameter = 0.41 mm) arms. Subjects underwent a standardized 4 limb-muscle needle EMG protocol during which pretest and posttest verbal analog pain scale (0-10) measures were obtained. As anticipated, EMG-induced pain was significantly higher (P < 0.001) than pre-EMG baseline pain. However, analysis of variance (ANOVA) revealed no significant differences in pain ratings between the CNE and MNE arms. Among other factors analyzed, only gender significantly influenced EMG-induced pain, with females reporting higher levels than males. Thus, pain is not an important selection criterion for type of disposable needle electrode.

Adult↗

PubMed2001

Inpatient interdisciplinary rehabilitation after total hip arthroplasty surgery: a comparison of revision and primary total hip arthroplasty.

OBJECTIVES: To describe outcomes of revision total hip arthroplasty (THA) patients who underwent interdisciplinary inpatient rehabilitation, and to compare them with primary THA patients. DESIGN: Descriptive and case-control study. SETTING: Forty-bed, community-based, freestanding rehabilitation hospital. PATIENTS: Thirty-nine revision THA subjects, gender- and age-matched with 39 primary THA controls. INTERVENTION: Inpatient interdisciplinary rehabilitation. MAIN OUTCOME MEASURES: FIM instrument, length of stay, hospital charges, and disposition location. RESULTS: The average revision THA patient stayed 10.5 days, improved from an admission FIM score of 89 to a discharge FIM score of 110, and incurred a hospital charge of $10,600. Of the revision THA patients, 98% were discharged home, and orthopedic-related complications were uncommon. No significant differences existed between revision and primary THA patients in any outcome measures. A trend toward higher rehabilitation charges ($12,400 vs $9500, p =.07) was found in revision THA patients who wore a hip orthosis. Otherwise, no differences were found in outcome measures based on the type of revision surgery, the presence of weight-bearing restrictions, or the presence of orthopedic complications. CONCLUSIONS: THA patients selected for inpatient rehabilitation have favorable short-term functional outcomes. The type of THA (primary vs revision) is not an independent differentiating factor.

Aged↗

PubMed2001

Functional assessment in patients with chronic pain: can physicians predict performance?

OBJECTIVES: To determine the appropriateness of using physicians to estimate the functional abilities of patients with chronic pain. Specific objectives included the following: (1) to compare the physician's predicted performance on functional assessment with actual performance, and (2) to compare the physician's predicted effort during functional assessment with an objective measure of effort. DESIGN: A total of 201 outpatients with chronic pain completed this prospective, multicenter, cohort study. Fifteen physicians, who were trained to administer the standardized evaluation, performed the evaluations and predicted performance and effort on functional assessment. Therapists, blinded to the physician's evaluation, administered a functional assessment (maximal and sustained lifts [n = 3 types]; repetitive activities [n = 4 types]) and a grip dynamometry test (effort measure) on each subject. RESULTS: Pearson's correlation testing demonstrated significant correlations between the physician's predicted performance and the observed performance for all lifting items and repetitive activities in both men (0.52, 0.50, 0.55) and women (0.36, 0.40, 0.18). Analysis of variance and post hoc t tests showed agreement between the physician's predicted effort and the dynamometry effort measure in only a small subset of patients (men were predicted to put forth absolutely no effort; n = 4). CONCLUSIONS: A trained physician, performing a standardized evaluation, can estimate with reasonable accuracy the work-related functional ability in patients with chronic pain. The prediction of effort seems to be more problematic.

Activities of Daily Living↗

PubMed2001

Cardiopulmonary rehabilitation and cancer rehabilitation. 1. Cardiac rehabilitation.

UNLABELLED: This self-directed learning module highlights cardiac rehabilitation issues facing able-bodied populations. It is part of the chapter on cardiovascular, pulmonary, and cancer rehabilitation in the Self-Directed Physiatric Education Program for practitioners and trainees in physical medicine and rehabilitation. This article focuses on various aspects of the management of cardiac disease and rehabilitation, including medication, exercise, risk-factor modification, secondary prevention, and surgery. Topics discussed include myocardial infarction, coronary artery disease, cardiomyopathy, and angina. New advances covered in this article include the various phases of cardiac rehabilitation, data on lifestyle adaptations for cardiac disease, and recent surgical advances for the treatment of severe heart failure. OVERALL ARTICLE OBJECTIVE: To review aspects of the management of cardiac disease and rehabilitation, including medication, exercise, risk-factor modification, secondary prevention, and surgery.

Aged↗

PubMed2001

Cardiopulmonary rehabilitation and cancer rehabilitation. 2. Cardiac rehabilitation in disabled populations.

UNLABELLED: This self-directed learning module highlights the clinical characteristics, medical treatment, and rehabilitation interventions of several cardiac scenarios encountered in physiatric practice. It is part of the chapter on cardiac rehabilitation in the Self-Directed Physiatric Education Program for practitioners and trainees in physical medicine and rehabilitation. This article discusses myocardial infarction during amputation, stroke as a result of cardiac surgery, myocardial perfusion defects in spinal cord injury, and heart murmur in Down syndrome. It also covers current medical management and the benefits of comprehensive rehabilitation and interventions for specific impairments seen in these conditions. OVERALL ARTICLE OBJECTIVE: To describe the clinical characteristics, medical treatment, and rehabilitation interventions of 4 cardiac scenarios encountered in physiatric practice.

Aged↗

PubMed2001

Cardiopulmonary rehabilitation and cancer rehabilitation. 3. Pulmonary rehabilitation.

UNLABELLED: This self-directed learning module highlights assessment and therapeutic options in the rehabilitation of patients with pulmonary diseases and in the pulmonary management of neurologic disorders. It is part of the chapter on cardiovascular, pulmonary, and cancer rehabilitation in the Self-Directed Physiatric Education Program for practitioners and trainees in physical medicine and rehabilitation. Topics reviewed in the rehabilitation of pulmonary diseases include interdisciplinary programming for patients with chronic obstructive pulmonary disease, the role of rehabilitation in lung transplantation and lung volume reduction surgery, and chest physiotherapy and other rehabilitation strategies for patients with cystic fibrosis. The pulmonary management of several neuromuscular disorders is discussed, with attention to the recognition of early pulmonary dysfunction, the role of ventilatory muscle training, and the indications and options for assisted ventilation. OVERALL ARTICLE OBJECTIVE: (a) To review the assessment and therapeutic options in the rehabilitation of patients with pulmonary diseases and (b) to describe the pulmonary management of neurologic disorders.

Adolescent↗

PubMed2000

Neutral wrist splinting in carpal tunnel syndrome: a comparison of night-only versus full-time wear instructions.

OBJECTIVE: To compare the effects of night-only to full-time splint wear instructions on symptoms, function, and impairment in carpal tunnel syndrome (CTS). DESIGN: Randomized clinical trial with 6-week follow-up. SETTING: Veterans Administration Medical Center, outpatient clinic. SUBJECTS: Outpatients with untreated CTS were consecutively recruited from our electrodiagnostics lab. Twenty-one patients (30 hands) were enrolled, and 17 patients (24 hands) completed the study. INTERVENTIONS: Thermoplastic, custom-molded, neutral wrist splints with subjects receiving either full-time or night-only wear instructions. OUTCOME MEASURES: Symptoms and functional deficits were measured by Levine's self-administered questionnaire, and physiologic impairment was measured by median nerve sensory and motor distal latency. COMPLIANCE AND CROSSOVER: Almost all (92%) of the combined sample reported frequent splint use, but their adherence to specific wearing instructions was limited. A majority (73%) of the full-time group reported splint wear less than one half of waking hours, and some (23%) of the night-only group reported occasional daytime wear. Despite this tendency for treatment crossover, the two treatment groups differed in daytime wear as intended (chi2 analysis, p = .004). RESULTS: The combined sample improved in three of four outcome measures: sensory distal latency (mean = .28msec, standard deviation [SD] = .37, p = .004), symptom severity (mean = .64, SD = .46, p = .0001), and functional deficits (mean = .49, SD = .51, p = .0001). Severity of CTS was a factor only in sensory distal latency improvement (more improvement in severe CTS). Subjects receiving full-time wear instructions showed superior distal latency improvement, both motor (.35 vs -.07msec, p = .04) and sensory (.46 vs . 13msec, p = .05) when compared with subjects receiving night-only wear instructions. CONCLUSIONS: This study provides added scientific evidence to support the efficacy of neutral wrist splints in CTS and suggests that physiologic improvement is best with full-time splint wear instructions.

Adult↗

PubMed1996

Level of care options for the low-functioning brain injury survivor.

During the early stages of recovery from severe brain injury many patients are comatose or minimally responsive. Rehabilitation for these low-functioning survivors traditionally includes acute medical care and transfer to a skilled nursing facility or acute rehabilitation. Concerns have been expressed that customary treatment options are ineffective, costly, or both. In response, 'intermediate'-level programmes designed to provide effective, cost-efficient rehabilitation have emerged. The purpose of this paper is to provide information regarding outcome of severe brain injury and the early rehabilitation needs of survivors. Common characteristics, advantages, and disadvantages of various intermediate programmes, including 'subacute' and 'transitional' rehabilitation, are discussed and contrasted.

Brain Damage, Chronic↗

PubMed1992

Silent cardiac ischemia in cervical spinal cord injury: case study.

The management of ischemic heart disease in patients with chronic spinal cord injury (SCI) will become an increasingly major concern as this population ages. Although silent ischemia has become an important topic in the medical literature, the relationship with cervical SCI has not been adequately explored. A literature search revealed no case reports of documented asymptomatic cardiac ischemia in SCI patients. This is a case report of a 65-year-old patient with chronic C7 incomplete SCI who had multiple risk factors for coronary artery disease and an abnormal electrocardiogram. Despite being completely asymptomatic, the patient was found to have significant myocardial ischemia induced by minimal stress using atrial paced thallium scintigraphy. This finding led to the cancellation of an elective surgical procedure. This case illustrates the importance of suspecting silent myocardial ischemia in cervical SCI patients.

Aged↗

PubMed1982