Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1995-02-06
1995-11-07
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604250, 604247, 4174772, 2221445, 222214, A61M 3900
Patent
active
054643880
ABSTRACT:
A cardioplegia administration system includes a tubing set, a positive displacement pump and a mixing system. The tubing set has a cardioplegia supply tube; a blood supply tube; and a cardioplegia administration tube connected to the cardioplegia and blood supply tubes. The positive displacement pump engages the cardioplegia administration tube to pump fluid therethrough. The mixing system includes pinch valves for alternately-continually pinching the cardioplegia and blood supply tubes to close and open the cardioplegia and blood supply tubes such that only one of the cardioplegia and blood supply tubes is open at a time, and a controller that controls the intervals during which the pinch valves are open to control the ratio of the cardioplegia medication and blood or blood substitute administered through the cardioplegia administration tube. The method of this invention includes the step, among others, of operating the pinch valves to close and open the cardioplegia and blood supply tubes so that only one of the cardioplegia and blood supply tubes is open at a time while controlling the intervals during which the pinch valves are open to control the ratio of the cardioplegia medication and blood or blood substitute administered through the cardioplegia administration tube.
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Merte Kenneth E.
O'Neill William G.
Bauer Stephen W.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Rosenbaum C. Fred
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