Apparatus and methods for minimizing cellular adhesion on peritoneal injection catheters
US4557724A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1983 |
| Grant date | Dec 10, 1985 |
| Priority date | — |
| Expiry date | Aug 12, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M39/0208
- WIPO fieldMedical technology
- WIPO sectorInstruments
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 th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.