Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1992-04-29
1994-08-09
Lewis, Ralph
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604 65, 128DIG12, A61M 500
Patent
active
053361814
ABSTRACT:
A method for use in an intravenous tube assembly comprises the steps of automatically monitoring liquid flow along a fluid flow path extending through an intravenous catheter to detect at least a partial cessation of flow along the fluid flow path and, upon detecting a diminution of liquid flow along the fluid flow path, automatically feeding an anticlotting agent to the fluid flow path. An assembly for implementing the method takes the form of a systolic actuator for dividing the fluid flow into successive aliquots which can be timed. The systolic actuator extracts energy from the fluid stream and monitors the stream via the extracted energy. Alternatively, a pressure device is operatively connected to the catheter for automatically detecting at least a partial cessation of liquid flow along a fluid flow path extending through the catheter. The assembly also includes a feeder mechanism operatively connected to the catheter and the sensing device for automatically feeding an anticlotting agent to the fluid flow path through the catheter upon a detection by the sensing device of a diminution of liquid flow along the fluid flow path and, more particularly, of intravenous liquid flow in a distal direction into a patient's circulatory system.
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Mizzi John V.
Nakao Naomi L.
Wilk Peter J.
Coleman Henry D.
Lewis Ralph
Sudol R. Neil
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