Circular anastomosis device with seal

• US 5,454,825 A
• Filed: 10/01/1993
• Issued: 10/03/1995
• Est. Priority Date: 10/01/1993
• Status: Expired due to Term

• Current Assignee: United States Surgical Corporation (Medtronic Plc)
• Original Assignee: United States Surgical Corporation (Medtronic Plc)
• Inventors: Viola, Frank J., Van Leeuwen, Timothy O., Calabrese, Philip D.
• Primary Examiner(s): Pellegrino, Stephen C.
• Assistant Examiner(s): SCHMIDT, JEFFREY
• Application Number:
  US08/130,607
• Time in Patent Office: 732 Days
• Field of Search: 606/142, 606/143, 606/151, 606/153, 606/213, 606/215, 227/175-181, 227/19, 227/901
• US Class Current: 606/151
• CPC Class Codes: A61B 17/11 for performing anastomosis; Buttons for anastomosis
• CPC Class Codes: A61B 2017/2904 curved, but rigid

Abstract

A surgical instrument for performing a circular anastomosis is disclosed. The instrument is provided with sealing means to permit use during endoscopic procedures. The first seal is fabricated from polyethylene foam, is disposed about an elongate member and is in at least partial contact with an inner surface of a compression member. The second seal is an O-ring seal configured and dimensioned to at least partially contact an outer portion of the compression member and an inner portion of an outer tube. The second seal is disposed intermediate of the compression member.

Claims

1. A surgical instrument for performing a circular anastomosis comprising:

a shaft assembly having generally tubular inner compression member and an outer tube with proximal and distal end portions;

a fastener assembly disposed at said outer tube distal end portion;

a housing portion disposed at said outer tube proximal end portion;

an anvil assembly disposed distal of said fastener assembly and means for manipulating said anvil assembly disposed proximal of housing portion, wherein at least one elongate member is disposed within said shaft assembly, said elongate member transferring movement from said anvil manipulating means to said anvil;

an actuator assembly associated with said housing portion for manipulating said inner compression member; and

sealing means positioned within said shaft assembly for inhibiting the flow of gases therethrough, said sealing means comprising a first seal fabricated from a generally solid disc of polyethylene foam, said first seal having a longitudinal aperture through which said at least one elongate member passes and having a generally cyclindrical outer surface in contact with an inner surface of said tubular compression member, and a second, O-ring seal disposed intermediate of said compression member and proximal of said first seal, said second seal configured and dimensioned to at least partially contact an outer portion of said tubular compression member and an inner portion of said outer tube.

2. The surgical instrument of claim 1, wherein said first seal is at least partially fabricated from closed cell polyethylene foam.

3. The surgical instrument of claim 1, wherein said second seal is at least partially fabricated from butyl rubber.

4. The surgical instrument of claim 1, wherein said tubular compression member has a circumferential grove on an outer surface thereof and said second seal is at least partially disposed within said groove.

5. The surgical instrument of claim 1, wherein said first seal inhibits the flow of gas between said elongate member and said compression member and said second seal inhibits the flow of gas between said tubular compression member and said outer tube.