Two-way outdwelling slit valving of medical liquid flow through a cannula and methods
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United States of America Patent
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Dec 8, 1992
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N/A
app pub date -
Oct 15, 1991
filing date -
Sep 4, 1990
priority date (Note) -
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Abstract
A cardiovascular outdwelling, normally closed, pressure-responsive bi-directional slit valve liquid flow control and related methods wherein a diaphragm having a slit therein is flexed distally by hydrostatic pressure and proximally by negative pressure at different points in time to selectively open the slit and accomodate the flow of IV solution to a medical patient through a cannula and blood sampling from the cardiovascular system of the patient through the cannula in such a way as to prevent bleed-back and clotting of blood within the cannula.
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