biphasic waveform


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biphasic waveform

An atypical 2-step—rather than single curve—pattern of clot formation, which is typical of disseminated intravascular coagulation (DIC), and detected by dynamic waveform analysis of changes in light transmission or absorption (LT/A), which occurs with coagulation. The biphasic waveform and gradient of the initial slope of the waveform correlate with the DIC’s severity or progression of clinical conditions.

biphasic waveform

A waveform used by some defibrillators that discharges energy in two phases (first positive, then negative). The shock applied by a biphasic defibrillator uses 30-40% less peak current at the same applied energy level than a monophasic defibrillator and is both less injurious to the heart and more likely to terminate ventricular fibrillation.
See also: waveform
References in periodicals archive ?
Comparison of the internal defibrillation thresholds for monophasic and double and single capacitor biphasic waveforms. J Am Coll Cardiol 1989, 14:1343-1349.
Of patients who underwent biphasic waveform AED, 19% were eventually discharged home, as were 14% of those who underwent monophasic defibrillation.
"One is a step forward in the technology of biphasic waveform that should lead to a decreased device cost and the other bolsters the intellectual property surrounding long-term wear electrodes and covers many aspects and methods of extending the wear time of electrodes to over a week."
This proprietary biphasic waveform is already patented in the United States.
Upper extremity arterial Doppler was obtained and showed biphasic waveforms with decreased pressures in the left brachial, radial, and ulnar arteries at rest.
Other ST waveform shape changes such as biphasic waveforms or ST depression were not observed in any fetuses at any time before, during, or after the occlusion.
Such active pectoral pulse generators, in combination with biphasic waveforms, result in marked reductions in DFT's and more stable thresholds long term (9, 11).