|Influence of selected parameters on detection of heart valves outlet strut fractures usinge Ect method
|AMTEE ’09 : eighth international conference on Advanced Methods in the Theory of Electrical Engineering : September 07-09, 2009 [Cheb, Czech Republic].
|University of West Bohemia
|Bjork-Shileyho protetické srdeční chlopně;materiál s defektní výstupní vzpěrou;testování vířivými proudy;numerická simulace
|Keywords in different language:
|Bjork-Shiley prosthetic heart valves;material defect of outlet strut;eddy current testing;numerical simulation
|Abstract in different language:
|The Bjork-Shiley Convexo Concave (BSCC) mechanical heart valve has been used in surgery between 1979- 1986. It was one of the most prevalent mechanical heart valves in that period. The valve is however plagued by an increased occurrence of unexpected mechanical failures of its outlet strut compared to equivalent valve types, with a high incidence of mortality, when they occur. The periodic evaluation of the state of the BSCC valve, non-destructive test of each individual valve may help to detect the fractures presented in heart valve replacements and so prevent the damages of the valve. According to these facts this article presents one of the electromagnetic methods - eddy current testing for noninvasive inspection of BSCC valve integrity. Prior studies of eddy-current testing have shown that the detection capabilities of the method depend on various parameters. Influences of the liftoff and excitation frequency on detected signal originated from cracked outlet strut are investigated and presented. The first part of the article contains introduction of the problem and description of the defect that occurs in BSCC heart valve. Description of the simulated problem that was performed, obtained results and their interpretation in the medicine are presented in the second part of the article.
|© University of West Bohemia
|Appears in Collections:
|CPEE – AMTEE 2009
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