Surgical fastener and surgical stapling apparatus
First Claim
Patent Images
1. An anvil assembly for a surgical fastener comprisingan anvil having a plurality of radiating fingers extending angularly outwardly of a longitudinal axis;
- an annular cutting block removably mounted on said fingers for engagement with an annular knife blade; and
means for biasing said fingers radially inwardly of said block to permit movement of said fingers radially inwardly in response to removal of said cutting block from said fingers.
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Abstract
The two-part surgical fastener is composed of an annular stapling part having projecting prongs and annular retaining board having an annular gap which receives the prongs. Barbs on the prongs serve to abut against a retaining ring on the retaining part to maintain a fixed relationship between the parts for stapling purposes. The anvil assembly on which the retaining part of the fastener is mounted as fingers which can be collapsed radially inwardly after stapling to permit ease of removal.
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Citations
14 Claims
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1. An anvil assembly for a surgical fastener comprising
an anvil having a plurality of radiating fingers extending angularly outwardly of a longitudinal axis; -
an annular cutting block removably mounted on said fingers for engagement with an annular knife blade; and means for biasing said fingers radially inwardly of said block to permit movement of said fingers radially inwardly in response to removal of said cutting block from said fingers. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A surgical stapling apparatus comprising
a central shaft; -
an anvil assembly mounted on a distal end of said shaft, said anvil assembly including a plurality of radiating fingers extending angularly outwardly of said shaft, an annular cutting block removably mounted on said fingers and means for biasing said fingers radially inwardly of said block; and a surgical fastener holding assembly mounted on said shaft for relative movement with said anvil assembly to releaseably retain two ends of tubular tissue therebetween, said holding assembly including an annular knife blade coaxially opposite said cutting block for severing tissue disposed therebetween, said blade having an edge for penetrating and holding said block thereon whereby upon movement of said holding assembly and said anvil assembly from each other, said block is removed from said fingers to permit said fingers to move radially inwardly for passage through a stapled seam between the two ends of the tissue. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification