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Biomedical subjects

Michael I Weintraub

Publications and source records attributed to Michael I Weintraub.

13 recordsLinked to original sources

Thrombolysis (tissue plasminogen activator) in stroke: a medicolegal quagmire.

BACKGROUND AND PURPOSE: Despite the success of the 1995 National Institutes of Neurological Disorders and Stroke (NINDS) study using IV recombinant tissue plasminogen activator (tPA) within 3 hours in acute stroke and its subsequent FDA approval, there has been a reluctance to use tPA because of safety and efficacy issues with high incidence of intracerebral hemorrhage, and protocol violations. SUMMARY OF REVIEW: The following cases will illustrate the increased number of malpractice lawsuits generated by the controversy of "standard of care" and illustrate and educate clinicians regarding specific issues and how to avoid: (A) Failure to use tPA (loss of chance) or to transfer, Reed versus Granbury Hospital (Texas): acute stroke victim taken to local hospital with tPA available only for cardiology. Wife subsequently transferred patient to nearby stroke center but no tPA given. Defendant verdict; (B) Stroke misdiagnosis (failure to diagnose, loss of chance), Mei versus Kaiser Permanente South (San Francisco, CA): acute stroke while driving with ambulance taking to local hospital. Symptoms were misdiagnosed and neurologist did not see her for 6 hours. Plaintiff verdict; (C) Bleeding complications of therapy/failure of informed consent, Harris versus Oak Valley Hospital (California): acute stroke and hypertension treated with tPA with subsequent development of intracerebral hemorrhage. Patient alleged that tPA should not have been given. Defense verdict; (D) Expert witness testimony, Wojcicki versus Caragher (Massachusetts): a prominent neurologist gave "false and misleading testimony" and the Court found that the neurologist perpetrated a "fraud on the Court" intentionally and deliberately misleading the Court and jury. Court sanctioned the neurologist 88,685 dollars; Ensink versus Mecosta County General Hospital (Michigan): neurological testimony (plaintiff expert) regarding potential benefit of using tPA during last available 1 hour of window was felt to be "speculative". Defendant verdict. CONCLUSIONS: Neurologists, emergency room physicians and hospitals are at increased liability risk if they use or do not use tPA. Detailed documentation, informed consent or timely transfer should reduce threat of legal action.

Aged↗

Magnetic insoles.

Explore the source record for details and available documents.

Equipment Design↗

Pulsed magnetic field therapy in refractory neuropathic pain secondary to peripheral neuropathy: electrodiagnostic parameters--pilot study.

CONTEXT: Neuropathic pain (NP) from peripheral neuropathy (PN) arises from ectopic firing of unmyelinated C-fibers with accumulation of sodium and calcium channels. Because pulsed electromagnetic fields (PEMF) safely induce extremely low frequency (ELF) quasirectangular currents that can depolarize, repolarize, and hyperpolarize neurons, it was hypothesized that directing this energy into the sole of one foot could potentially modulate neuropathic pain. OBJECTIVE: To determine if 9 consecutive 1-h treatments in physician's office (excluding weekends) of a pulsed signal therapy can reduce NP scores in refractory feet with PN. DESIGN/SETTING/PATIENTS: 24 consecutive patients with refractory and symptomatic PN from diabetes, chronic inflammatory demyelinating polyneuropathy (CIDP), pernicious anemia, mercury poisoning, paraneoplastic syndrome, tarsal tunnel, and idiopathic sensory neuropathy were enrolled in this nonplacebo pilot study. The most symptomatic foot received therapy. Primary endpoints were comparison of VAS scores at the end of 9 days and the end of 30 days follow-up compared to baseline pain scores. Additionally, Patients' Global Impression of Change (PGIC) questionnaire was tabulated describing response to treatment. Subgroup analysis of nerve conduction scores, quantified sensory testing (QST), and serial examination changes were also tabulated. Subgroup classification of pain (Serlin) was utilized to determine if there were disproportionate responses. INTERVENTION: Noninvasive pulsed signal therapy generates a unidirectional quasirectangular waveform with strength about 20 gauss and a frequency about 30 Hz into the soles of the feet for 9 consecutive 1-h treatments (excluding weekends). The most symptomatic foot of each patient was treated. RESULTS: All 24 feet completed 9 days of treatment. 15/24 completed follow-up (62%) with mean pain scores decreasing 21% from baseline to end of treatment (P=0.19) but with 49% reduction of pain scores from baseline to end of follow-up (P<0.01). Of this group, self-reported PGIC was improved 67% (n=10) and no change was 33% (n=5). An intent-to-treat analysis based on all 24 feet demonstrated a 19% reduction in pain scores from baseline to end of treatment (P=0.10) and a 37% decrease from baseline to end of follow-up (P<0.01). Subgroup analysis revealed 5 patients with mild pain with nonsignificant reduction at end of follow-up. Of the 19 feet with moderate to severe pain, there was a 28% reduction from baseline to end of treatment (P<0.05) and a 39% decrease from baseline to end of follow-up (P<0.01). Benefit was better in those patients with axonal changes and advanced CPT baseline scores. The clinical examination did not change. There were no adverse events or safety issues. CONCLUSIONS: These pilot data demonstrate that directing PEMF to refractory feet can provide unexpected shortterm analgesic effects in more than 50% of individuals. The role of placebo is not known and was not tested. The precise mechanism is unclear yet suggests that severe and advanced cases are more magnetically sensitive. Future studies are needed with randomized placebo-controlled design and longer treatment periods.

Adult↗

Static magnetic field therapy for symptomatic diabetic neuropathy: a randomized, double-blind, placebo-controlled trial.

OBJECTIVE: To determine if constant wearing of multipolar, static magnetic (450G) shoe insoles can reduce neuropathic pain and quality of life (QOL) scores in symptomatic diabetic peripheral neuropathy (DPN). DESIGN: Randomized, placebo-control, parallel study. SETTING: Forty-eight centers in 27 states. PARTICIPANTS: Three hundred seventy-five subjects with DPN stage II or III were randomly assigned to wear constantly magnetized insoles for 4 months; the placebo group wore similar, unmagnetized device. INTERVENTION: Nerve conduction and/or quantified sensory testing were performed serially. MAIN OUTCOME MEASURES: Daily visual analog scale scores for numbness or tingling and burning and QOL issues were tabulated over 4 months. Secondary measures included nerve conduction changes, role of placebo, and safety issues. Analysis of variance (ANOVA), analysis of covariance (ANCOVA), and chi-square analysis were performed. RESULTS: There were statistically significant reductions during the third and fourth months in burning (mean change for magnet treatment, -12%; for sham, -3%; P<.05, ANCOVA), numbness and tingling (magnet, -10%; sham, +1%; P<.05, ANCOVA), and exercise-induced foot pain (magnet, -12%; sham, -4%; P<.05, ANCOVA). For a subset of patients with baseline severe pain, statistically significant reductions occurred from baseline through the fourth month in numbness and tingling (magnet, -32%; sham, -14%; P<.01, ANOVA) and foot pain (magnet, -41%; sham, -21%; P<.01, ANOVA). CONCLUSIONS: Static magnetic fields can penetrate up to 20mm and appear to target the ectopic firing nociceptors in the epidermis and dermis. Analgesic benefits were achieved over time.

Adult↗

Complementary and alternative methods of treatment of neck pain.

The enthusiasm for complementary and alternative medicine (CAM) is worldwide and is based on the public perception that these approaches are safe and effective. In reality, however, this attitude is based more on cultural and anecdotal experiences than on stringent scientific trials. Because neck pain is a common and disabling symptom that frustrates both patients and physicians, this article reviews the applicability of several CAM therapies for the treatment of neck pain. Despite the long history of CAM, more systematic and better designed, randomized, placebo-controlled trials are needed to determine which approaches have merit. This article recognizes the shortcomings of conventional therapies and encourages clinicians to explore additional treatment options. It is hoped that in the future greater acceptance and integration of CAM can be based on sound scientific results.

Complementary Therapies↗