Patent ID: 8475458

Claim:
A method of removing tissue from a spinal disc within a body of a patient, comprising: (a) positioning a distal housing of a medical device to a target tissue site, (b) penetrating the annulus of the disc to position a working end the device within the nucleus pulposus of the disc wherein the working end comprises a housing holding a first rotatable member comprising a plurality of separated disc shaped blades and an first axis of rotation and holding a second rotatable member comprising a plurality of disc shaped rotatable blades having a second axis of rotation, wherein the first and second axes of rotations are not collinear; (c) rotating the first and second rotatable members in opposite directions while pressing against a portion of the nucleus pulposus to be removed; and (d) drawing extract nucleus material into the housing between the oppositely rotating first and second rotatable members; and (e) thereafter removing the working end from the annulus.