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Collapsible anvil plate assemblies for circular surgical stapling devices

  • US 9,113,883 B2
  • Filed: 07/13/2011
  • Issued: 08/25/2015
  • Est. Priority Date: 03/14/2011
  • Status: Active Grant
First Claim
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1. An anvil plate for a surgical stapling instrument, said anvil plate comprising:

  • a plurality of anvil plate segments movably interconnected and reconfigurable from a first orientation wherein said anvil plate segments may be inserted through a cannula opening as a unit and then reconfigured into a second orientation in the form of a substantially planar anvil plate assembly that has a diameter that is larger than a diameter of said cannula opening, wherein said plurality of anvil plate segments are coupled together by a plurality of hinges, wherein said plurality of anvil plate segments comprises four arcuate plate segments coupled by said hinges in end-to-end fashion such that when said four arcuate plate segments are in said first orientation, said four arcuate plate segments may be substantially stacked on top of each other; and

    a flexible tether threadably engaging each of said arcuate plate segments such that said arcuate plate segments may be inserted through said cannula opening in an end-to end fashion wherein said arcuate plate segments do not form an annular plate assembly and then drawn together to form said annular plate assembly by applying an actuation motion to said flexible tether to draw a free end of one of said arcuate plate segments into abutting contact with another free end of another of said arcuate plate segments to form said annular plate assembly.

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