Surgical cutting instrument

Details Surgical cutting instrument Surgical cutting instrument

A - Human Necessities

61

B

A61B 17/32 (2006.01) A61F 9/007 (2006.01) A61B 17/00 (2006.01)

Patent

CA 2161688

A surgical cutting instrument (10) includes an outer tubular member (13), or cannula, sized for percutaneous insertion into an anatomical space. The outer tubular member has a cutting opening (14) at its blunt-tipped distal end (15). The proximal end is supported by a hand piece (11). A cutting member (20) includes a tubular member having a cutting head (43) portion at its distal end and a body portion (44) extending therefrom to the hand piece (11). A hinge (41) is integrally formed in the tubular cannula to connect the cutting head (43) portion with the body portion (44), to permit pivoting of the cutting head portion (43) relative to the body portion. As the cutting member (20) is reciprocated within the outer cannula (13), the cutting edge (22) contacts tissue drawn into the cutting opening (14). Resistance from the tissue causes the cutting head to pivot about the hinge to form an essentially zero clearance between the cutting head and the cutting opening in the outer cannula.

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