Tina S Andersen

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BACKGROUND AND AIM OF THE STUDY Quantification of cavitation near mechanical heart valves in vivo is currently based on measurements of high-frequency pressure fluctuations (HFPF). Until now, mechanical resonance components have been removed using a high-pass filter. However, isolating cavitation and resonance signal components by separating the(More)
BACKGROUND AND AIM OF THE STUDY Cavitation may cause erosion of prosthetic heart valve material. The phenomenon has been extensively studied in vitro, and an association between the presence of cavitation bubbles and high-frequency pressure fluctuations (HFPF) has been established. In-vivo studies examining this phenomenon are scarce; hence, the study aim(More)
BACKGROUND Cavitation has been claimed partly responsible for the increased risk of thromboembolic complications, hemolysis, and fatal valve failure seen in mechanical heart valve patients. In vivo studies have investigated cavitation using high-pass filtering of the high-frequency pressure fluctuations with the root mean square values as an assessment of(More)
Information about muscular tissue flow is important for diagnosing, treating and monitoring patients with tissue ischemia. For this purpose an objective method which is reproducible and continuous is needed. In co-operation with the company Unisense A/S, we have developed a sensor for instantaneous and continuous monitoring of muscle tissue flow in vivo.(More)
Today, the quality of mechanical heart valves is quite high, and implantation has become a routine clinical procedure with a low operative mortality (< 5%). However, patients still face the risks of blood cell damage, thromboembolic events, and material failure of the prosthetic device. One mechanism found to be a possible contributor to these adverse(More)
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