Anvil for circular stapler
First Claim
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1. An anvil assembly for a circular stapling instrument comprising:
- a shaft having proximal and distal end portions;
an anvil pivotally associated with the shaft distal end portion; and
a retaining member at least partially disposed within the anvil, the retaining member being movable from a first position, wherein the anvil is prevented from pivoting relative to the shaft, and a second position, wherein the anvil is pivotable relative to the shaft.
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Abstract
An anvil assembly for a surgical fastening instrument is disclosed. The anvil is constructed to pivot relative to an anvil shaft to facilitate movement of the anvil and instrument during use. The anvil also has an improved surface for severing structures and a sloped surface for guiding a knife during use.
1967 Citations
24 Claims
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1. An anvil assembly for a circular stapling instrument comprising:
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a shaft having proximal and distal end portions; an anvil pivotally associated with the shaft distal end portion; and a retaining member at least partially disposed within the anvil, the retaining member being movable from a first position, wherein the anvil is prevented from pivoting relative to the shaft, and a second position, wherein the anvil is pivotable relative to the shaft. - View Dependent Claims (2, 3, 4)
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5. An anvil assembly for a circular stapling instrument comprising:
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a shaft having proximal and distal end portions; an anvil pivotally associated with the shaft distal end portion; and a retaining member movable from a first position, wherein a portion of the retaining member is in contact with the distal end portion of the shaft, to a second position, wherein the portion of the retaining member in contact with the distal end portion of the shaft has moved from the first position. - View Dependent Claims (6)
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7. An anvil assembly for a circular stapling instrument comprising:
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a shaft having proximal and distal end portions; an anvil pivotally associated with the shaft distal end portion; and biasing means disposed between the shaft and the anvil for pivotally moving the anvil relative to the shaft. - View Dependent Claims (8, 9)
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10. An anvil assembly for a circular stapling instrument comprising:
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a shaft having proximal and distal end portions and a longitudinal axis; an anvil pivotally associated with the distal end portion of the shaft; and a spring disposed between the shaft and the anvil for pivotally biasing the anvil relative to the shaft longitudinal axis. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. In an anvil assembly for a circular stapling instrument, the anvil assembly having an anvil and a shaft having a longitudinal axis extending from the anvil, the improvement comprising:
pivotal association between the anvil and shaft and a spring disposed between the shaft and the anvil for pivotally biasing the anvil relative to the shaft longitudinal axis.
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21. An anvil assembly for a circular stapling instrument comprising:
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a shaft having proximal and distal end portions; an anvil pivotally associated with the shaft distal end portion; and locking means for locking the anvil in a substantially perpendicular orientation relative to the shaft, the locking means at least partially contacting a portion of the shaft. - View Dependent Claims (22, 23, 24)
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Specification