Surgery – Means for introducing or removing material from body for... – Material introduced into and removed from body through...
Patent
1987-07-31
1989-06-13
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Material introduced into and removed from body through...
128764, 128765, 128766, 604 4, 604183, 604208, 604248, A61M 3100
Patent
active
048388556
ABSTRACT:
A blood aspiration assembly and method has proximal, intermediate and distal tubing, a reservoir having an adjustable volume and an aspirator receiver. A two-way valve can connect the reservoir to the intermediate tube and block flow to the proximal tubing, or can connect the intermediate and proximal tubing while blocking flow to the reservoir. The reservoir can be locked into selected withdrawal and discharge positions. The intermediate tube is connected with the aspirator receiver. The receiver is connected with the distal tubing. The receiver has a housing comprising a rigid casing and a resilient plug. The valve and reservoir can be operated to withdraw resident fluid from the assembly flow channels distal thereto into the reservoir, and draw blood from the patient into the intermediate tube to remove resident fluid from the aspiration chamber. A needle from a separate syringe is inserted through the plug into the aspirator chamber and a blood sample withdrawn. The reservoir has a predetermined potential maximum fluid volume equal to that volume which, when withdrawn into the reservoir from the intermediate tube, results in the replacement of essentially all resident fluid in the aspiration chamber and that portion of the apparatus distal to the aspiration chamber by essentially undiluted blood. The reservoir volume is less than the total internal volume of the apparatus distal to the reservoir whereby withdrawal of fluid into the reservoir does not cause blood to flow into the reservoir. The intermediate tube can have an enlarged section of be spiralled.
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Costantino Mario
Rosenbaum C. Fred
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