Publications by authors named "Yu-Kweng M Lin"
Cavitation on a mechanical heart valve (MHV) is attributable to transient regional pressure drop at the instant of valve closure. As a cavitation bubble collapses, it emits shock waves, which have the characteristics of high frequency oscillations (HFO) on a pressure time trace. The potential for such HFO bursts to cause material damage on an MHV can be measured by the cavitation impulse I, which is defined as the area under the trace of the HFO bursts.
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- The study investigates cavitation damage on mechanical heart valves (MHVs) by analyzing their statistical characteristics during accelerated testing.
- A 25-mm St. Jude Medical bileaflet MHV was tested at varying pulse rates while measuring transient pressure fluctuations at valve closure using a miniature pressure transducer.
- Findings reveal that the measures of cavitation intensity, specifically local root-mean-square (LRMS) value and cavitation impulse, follow a log-normal distribution, while the time span of cavitation events is normally distributed, suggesting the need for further exploration of the relationship between cavitation intensity and damage on MHV surfaces.