Apparatus and method for replacing the nucleus pulposus of an intervertebral disc or for replacing an entire intervertebral disc
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United States of America Patent
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app pub date -
Nov 5, 2001
filing date -
Apr 26, 2000
priority date (Note) -
Abandoned
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Abstract
A prosthetic nucleus pulposus for replacing the natural nucleus pulposus of an intervertebral disc. The prosthetic nucleus proposus comprises a partially collapsed sealed envelope formed from a material which is permeable to extracellular body fluid. The envelope contains a solute which provides an osmotic potential across the walls of the envelope. In use, the partially collapsed envelope is surgically implanted in the hallowed-out interior of an intervertebral disc and is allowed to absorb fluid, whereby expansion of the envelope and subsequent disc expansion is accomplished.
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