Trocar having blunt tip
First Claim
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1. A trocar comprising:
- an elongated trocar body having a tapered portion at a distal end;
a blade housing, arranged along about a longitudinal axis of said trocar body, having a base and a blunt tip, said base of said blade housing being arranged adjacent said distal end of said trocar body;
a plurality of elongated blades arranged radially about said blade housing and having proximal and distal ends, said proximal ends being connected to said blade housing;
means for connecting said blade housing and said trocar body in axially opposed movable alignment;
means for urging a distal end of a blade radially outwardly by axial movement of said blade housing toward said tapered portion of said trocar body.
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Abstract
A trocar has an elongated body with a frustro-conical end which terminates in a blunt tip. A plurality of blades are radially attached to a blade housing connected to the trocar body. In one embodiment the blade housing moves toward the trocar body in response to a force causing the blades to extend to a cutting position. When the force is removed the blades return to a retracted position.
166 Citations
20 Claims
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1. A trocar comprising:
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an elongated trocar body having a tapered portion at a distal end; a blade housing, arranged along about a longitudinal axis of said trocar body, having a base and a blunt tip, said base of said blade housing being arranged adjacent said distal end of said trocar body; a plurality of elongated blades arranged radially about said blade housing and having proximal and distal ends, said proximal ends being connected to said blade housing; means for connecting said blade housing and said trocar body in axially opposed movable alignment; means for urging a distal end of a blade radially outwardly by axial movement of said blade housing toward said tapered portion of said trocar body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. In a trocar comprising an elongated body, sized to pass through a cannula, and a distal end comprising blades for cutting, the improvement comprising:
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said distal end comprising a blade housing having a blunt tip; said blade housing having a tapered surface extending longitudinally from said blunt tip, comprising a plurality of longitudinally extending, radially mounted elongated blades with cutting edges extending radially outwardly from said tapered surface and arranged set back from said blunt tip. - View Dependent Claims (18, 19, 20)
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Specification