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Disposable instrument for surgical fastening

  • US 4,351,466 A
  • Filed: 10/16/1980
  • Issued: 09/28/1982
  • Est. Priority Date: 10/16/1980
  • Status: Expired due to Term
First Claim
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1. A surgical fastening instrument which comprises:

  • (a) a tubular housing having an axial bore and an axial slot which extends through its tubular wall;

    (b) a tubular pusher axially located within the bore of said housing and adapted to move distally and proximally within the bore;

    said pusher having an axial slot extending through its tubular wall;

    said pusher slot being angularly aligned with said housing slot;

    (c) a central rod axially located within said pusher and adapted to move distally and proximally within said pusher;

    said central rod having an axial groove in its lateral surface;

    said central rod groove being angularly aligned with said pusher slot;

    (d) means, located at the proximal end of said housing, for moving said central rod distally and proximally within said pusher;

    (e) a handle pivotally mounted on the tubular wall of said housing;

    the pivotal mounting of said handle being laterally spaced from the tubular wall of said housing;

    a first part of said handle being located on the side of the pivotal mounting remote from said housing and being adapted to move about the pivotal mounting towards said housing;

    a second part of said handle being located on the other side of the pivotal mounting, adjacent to said housing, and being positioned within the slot in said housing and within the slot in said pusher;

    the second part of said handle being adapted to move distally against the distal end of the slot in said pusher to move said pusher distally within the bore of said housing upon movement of the first part of said handle towards said housing;

    the end of the second part of said handle, remote from the pivotal mounting, being spaced from the pivotal mounting by a distance greater than the lateral distance between the pivotal mounting and the lateral surface of said central rod;

    (f) an anvil mounted in a predetermined indexed orientation on the distal end of said central rod;

    (g) a staple carrying assembly mounted in a predetermined indexed orientation on the distal end of said housing between said anvil and the distal end of said pusher;

    said staple carrying assembly being activated by distal movement of said pusher against the proximal end of said staple carrying assembly, so that staples are urged distally against said anvil; and

    (h) means for determining that the axial position of the distal end of said central rod relative to the distal end of said housing is such that said anvil and said staple carrying member are properly spaced apart for fastening tissue between them;

    the groove in said central rod being located, so that when said anvil and said staple carrying assembly are properly spaced apart for fastening tissue between them;

    (1) at least a portion of the slot in said pusher is laterally aligned with at least a portion of the groove in said central rod; and

    (2) the end of the second part of said handle, remote from the pivotal mounting, can move medially and distally into the groove in said central rod and the second part of said handle can move distally against the distal end of the slot in said pusher to move said pusher distally within the bore of said housing against the proximal end of said staple carrying assembly to activate said staple carrying assembly.

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