Medical Definition of Simon nitinol ivc filter
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Introduced 1990; Nitinol Medical Technologies, Woburn, MA. BARD, thermal memory alloy:titanium and nickel;, straightened form at cool temperatures (4-10C), reforms into predetermined filter shape at body temperatures efficacy, recurrent PE: 0 - 4.8%, IVC thrombosis: 7 - 11% (by clinical symptoms), access site thrombosis: 2 - 10% advantages, narrow introducer sheath (9 Fr), largest choice of access: brachial or left CFV approach without difficulty, only mild MRI artifacts disadvantages, IVC thrombosis: symptomatic occlusion rates higher than reported wtih Greenfield or bird's nest filters, caval penetration: 1 - 33%, caudal drop: exact filter location difficult to predict
(12 Dec 1998)
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