Prosthetic disc containing therapeutic material

Details Prosthetic disc containing therapeutic material Prosthetic disc containing therapeutic material

A - Human Necessities

61

F

128/104, 3/141

A61F 2/44 (2006.01) A61F 2/46 (2006.01) A61L 27/04 (2006.01) A61L 27/44 (2006.01) A61F 2/00 (2006.01) A61F 2/02 (2006.01) A61F 2/30 (2006.01)

Patent

CA 1324864

Charles D. Ray and Terry P. Corbin ABSTRACT OF THE DISCLOSURE PROSTHETIC DISC CONTAINING THERAPEUTIC MATERIAL By implanting two prosthetic disc capsules side- by-side into a damaged disc of a human spine, both height and motion, including front-to-back bending, can be maintained. Each prosthetic disc capsule has a bladder enclosing a fluid containing a therapeutic material that is slowly diffusible through a semipermeable membrane of the bladder. The fluid filling the semipermeable membrane preferably is an aqueous solution that has gel-like properties that afford a viscosity and velocity-shear behavior imitating the natural rheology of intradiscal nuclear tissue. Those properties are obtained when the aqueous solution is of a mucopolysaccharide such as hyaluronic acid or sodium hyaluronate.

606452

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