Surgical cutting instrument
AssigneeBaxter Travenol Laboratories, Inc.
InventorsErin McGurk-Burleson, Elmer Koehler, Victor Packham
Life of this patent
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Abstract
A surgical cutting instrument comprising an outer tube having a peripheral wall and a longitudinal axis. The outer tube has a plurality of openings arranged generally longitudinally along the outer tube. Each of the openings has first and second cutting edges defining portions of the periphery of such opening. Each of the first cutting edges is substantially straight as viewed in a particular direction perpendicular to the longitudinal axis of the outer tube. An inner cutting member to rotatable within the outer tube. The inner cutting member has a cutting edge cooperable with the first and second cutting edges of the openings of the outer tube for cutting material from within the patient with a shearing action.
Claims19
A surgical cutting instrument comprising:
- an outer tube sized for insertion through an opening in a patient, said outer tube having a peripheral wall and a longitudinal axis;
- said outer tube having a plurality of openings arranged generally longitudinally along the outer tube;
- each of said openings having first and second cutting edges defining portions of the periphery of such opening, said first cutting edge of each of said openings being substantially straight as viewed in a particular direction perpendicular to the longitudinal axis of the outer tube;
- an inner cutting member rotatable within said outer tube;
- said inner cutting member having a cutting edge cooperable with said first and second cutting edges of said openings of the outer tube for cutting material from within the patient with a shearing action that progresses along said first and second cutting edges as the inner cutting member rotates;
- and
- each of said openings including a curved edge which includes said second edge and each of said first edges intersecting the associated curved edge and substantially defining therewith the full periphery of the associated opening.
A surgical cutting instrument comprising:
- an outer tube sized for insertion through an opening in a patient, said outer tube having a peripheral wall and a longitudinal axis;
- said outer tube having an opening, said opening having first and second cutting edges defining portions of the periphery of the opening, said first cutting edge of said opening being substantially straight as viewed in a particular direction perpendicular to the longitudinal axis of the outer tube;
- said second cutting edge being curved and intersecting the first edge to define the full periphery of the opening;
- an inner cutting member rotatable within said outer tube;
- and
- said inner cutting member having a cutting edge cooperable with said first and second cutting edges of said opening of the outer tube for cutting material from within the patient with a shearing action that progresses along said first and second cutting edges as the inner cutting member rotates.
Dependencies are inferred from the claim text.