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Releasable tissue anchoring device and method for using

  • US 9,282,964 B1
  • Filed: 12/13/2012
  • Issued: 03/15/2016
  • Est. Priority Date: 10/29/2002
  • Status: Expired due to Term
First Claim
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1. A medical instrument for approximating tissue within a patient'"'"'s body during a minimally invasive surgical procedure, comprising:

  • (a) a first set of expandable wings;

    (b) a second set of expandable wings;

    (c) a rail along which the first and second sets of expandable wings are located; and

    (d) a locking mechanism for allowing the first and second sets of expandable wings to be moved to a more proximate position while inhibiting movement of the first and second sets of expandable wings to a more distant relative position along a length of the rail, after being moved to the more proximate position;

    (e) relatively movable elements that engage the first and second sets of expandable wings;

    (f) a threaded screw and an oppositely threaded screw;

    (g) a threaded engagement feature for engaging a control wire;

    (h) a seat region for engaging a push tube, wherein when the control wire and the push tube engage the relatively movable elements and are moved relative to one another, the movable elements can be made to bring the first and second sets of expandable wings to the more proximate position, wherein the first set of expandable wings is a set of distal expansion wings located at a distal position on the medical instrument;

    (i) a controllable stop element that inhibits the set of distal expansion wings from extending beyond a desired retention position when located in a first position, and allows distal axial collapse of the distal expansion wings when located in a second position so that the medical instrument may be extracted in its entirety from a proximal side of the tissue;

    wherein the control wire is rotatable relative to the threaded engagement feature such that upon rotation in one direction the control wire is disengaged, while rotation in an opposite direction causes turning of the oppositely threaded screw which causes movement of the controllable stop element to the second position that allows the distal axial collapse.

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