Surgical fastener applying apparatus
First Claim
1. A surgical stapler apparatus for applying an annular array of staples comprising:
- a tubular body portion;
a staple pusher member disposed at a distal end of said body portion for expelling said annular array of staples;
means for actuating said staple pusher member to expel said staples;
an anvil member disposed at the distal end of said body portion and positioned opposite said staple pusher member to clinch said staples in tissue upon expulsion of said staples; and
means for advancing at least one of said staple pusher member and said anvil member from an extended position away from the other of said members to a position adjacent said other member, said advancing means including a rotatable sleeve having an elongated slot extending through a sidewall of the sleeve along a longitudinal axis of the surgical stapler apparatus and a latch member extending through said elongated slot to a position external to said sleeve, said latch member being operatively connected to said at least one of said staple pusher member and said anvil member and movable to advance and retract said at least one of said staple pusher member and said anvil member, said advancing means moving said at least one of said staple pusher member and said anvil member in a two-stage advancement;
wherein during a first stage of the two-stage advancement, slidable movement of the latch member causes said at least one of said staple pusher member and said anvil member to travel a first distance, and during a second stage of the two-stage advancement, rotation of the sleeve and latch member causes said at least one of said staple pusher member and said anvil member to travel a second distance, wherein the first distance is greater than the second distance.
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Accused Products
Abstract
A surgical apparatus for applying staples or fasteners to tissue to form a circular anastomosis having an adjustable closure mechanism to rapidly approximate the distance between the anvil member and the fastener assembly of the instrument. The adjustable closure mechanism provides for rapid approximation during an initial movement and for fine adjustment of the distance between the anvil member and the fastener assembly upon subsequent movement of the closure mechanism. The closure mechanism consists of an advancing mechanism which operates in a two stage advancement, such that initial movement of the advancing mechanism moves the anvil member a greater distance than a subsequent movement of the advancing mechanism.
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Citations
16 Claims
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1. A surgical stapler apparatus for applying an annular array of staples comprising:
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a tubular body portion; a staple pusher member disposed at a distal end of said body portion for expelling said annular array of staples; means for actuating said staple pusher member to expel said staples; an anvil member disposed at the distal end of said body portion and positioned opposite said staple pusher member to clinch said staples in tissue upon expulsion of said staples; and means for advancing at least one of said staple pusher member and said anvil member from an extended position away from the other of said members to a position adjacent said other member, said advancing means including a rotatable sleeve having an elongated slot extending through a sidewall of the sleeve along a longitudinal axis of the surgical stapler apparatus and a latch member extending through said elongated slot to a position external to said sleeve, said latch member being operatively connected to said at least one of said staple pusher member and said anvil member and movable to advance and retract said at least one of said staple pusher member and said anvil member, said advancing means moving said at least one of said staple pusher member and said anvil member in a two-stage advancement; wherein during a first stage of the two-stage advancement, slidable movement of the latch member causes said at least one of said staple pusher member and said anvil member to travel a first distance, and during a second stage of the two-stage advancement, rotation of the sleeve and latch member causes said at least one of said staple pusher member and said anvil member to travel a second distance, wherein the first distance is greater than the second distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A surgical stapler apparatus for applying an annular array of staples comprising:
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a tubular body portion; a handle portion including a slot; a staple pusher member disposed at a distal end of said body portion for expelling said annular array of staples; means for actuating said staple pusher member to expel said staples adjacent said handle portion; an anvil member disposed at the distal end of said body portion and positioned opposite said staple pusher member to clinch said staples in tissue upon expulsion of said staples; and means for advancing at least one of said staple pusher member and said anvil member from an extended position away from the other of said members to a position adjacent said other member, said advancing means including a rotatable sleeve having an elongated slot, and a slidable latch member extending through said elongated slot and said handle slot to a position external to said handle portion, said latch member being operatively connected to said at least one of said staple pusher member and said anvil member and movable to advance and retract said at least one of said staple pusher member and said anvil member relative to the other of said members. - View Dependent Claims (10)
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11. A surgical stapler apparatus for applying an annular array of staples comprising:
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a grip member; an elongated body portion; an anvil member disposed adjacent a distal end of the elongated body portion; a pusher member positioned opposite to the anvil member, the pusher member and the anvil member being relatively movable to each other between spaced and approximated positions; and a latch member operatively connected to one of the pusher member and the anvil member, the latch member being movable between first and second positions to effect relative movement of the anvil and pusher members between the spaced and approximated positions, the latch member being operatively associated with the grip member such that the latch member is prevented from rotating during movement of the latch member between the first and second positions, and the latch member is allowed to rotate while in the second position which effects further relative movement of the pusher member and the anvil member between the spaced and approximated positions. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification