Apparatus for joint fluid decompression and filtration

Details Apparatus for joint fluid decompression and filtration Apparatus for joint fluid decompression and filtration

A - Human Necessities

61

F

A61F 2/30 (2006.01) A61M 1/00 (2006.01) A61M 27/00 (2006.01) A61F 2/32 (2006.01) A61F 2/36 (2006.01)

Patent

CA 2125409

2125409 9311721 PCTABS00022 A prosthetic low pressure reservoir (48) for joint fluid (30) and removal of particulate debris from arthritic joints or joints containing artificial, man-made prostheses filters the fluid (30) and traps any particles therein, thus removing them from the periprosthetic space. The extraarticular location of the reservoir (48) is at a lower pressure than the intraarticular space (31). Increases in intraarticular joint fluid (30) pressure during normal joint activities will cause fluid (30) and particulate debris to preferentially flow into the low pressure reservoir (48). In this manner, intraarticular fluid pressures are reduced, joint fluid is filtered, and the particulate and/or solute species are collected in the device while joint fluid (30) either diffuses into the extraarticular space or is recycled back into the joint. The device may be implanted at the same time as or any time after a joint is replaced by a prosthesis. This device may also be incorporated as a fixed feature of an implant/bearing combination.

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