Surgery – Means for introducing or removing material from body for... – Material introduced into and removed from body through...
Patent
1983-08-12
1985-12-10
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Material introduced into and removed from body through...
604 93, 604265, A61M 2500
Patent
active
045577242
ABSTRACT:
The present invention is directed to a subcutaneous peritoneal injection catheter apparatus and methods which minimizes catheter obstruction during use. The apparatus includes a receiving chamber or reservoir having a relatively small internal volume while employing a penetrable membrane and relatively enlarged target surface area. The reservoir is interconnected with the peritoneal cavity by a hollow stem. The penetrable membrane accommodates a hollow needle being inserted into the receiving reservoir and is configurated with a dome-like profile so that the membrane may also be depressed to expel insulin from the receiving reservoir into the peritoneal cavity in a direction generally toward the mesenteric peritoneal membrane.
The portion of the apparatus which is in the peritoneal cavity is preferably constructed of, or coated with, a material which is capable of minimizing the adhesion of cells and the growth of bacteria on that portion of the apparatus. In a presently preferred embodiment of the subcutaneous peritoneal injection catheter, the portion of the catheter to be within the peritoneal cavity is constructed of a polyurethane material, and this polyurethane material is then coated with a solution of polyurethane and poly(ethylene glycol) in a suitable solvent.
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Coleman Dennis L.
Gregonis Donald E.
Hanover Barry K.
Harrow Jeffrey J.
Hunter Stephen K.
Costantino Mario
Rosenbaum C. Fred
University of Utah Research Foundation
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