CIRCULAR SURGICAL STAPLERS WITH ISOLATING SLEEVES STORED INSIDE ANVIL
First Claim
1. A circular stapling instrument comprising:
- a) an anvil having a tissue facing end and an opposite distal end;
the anvil having a peripheral staple bending zone and a coaxial circular knife recess on said tissue facing end;
the anvil having a circumferential recess formed inside said anvil, with a circumferential entrance into said circumferential recess positioned on said tissue facing end coaxially between the staple bending zone and the circular knife recess;
b) a cylindrical stapling head mounted on a support shaft, said stapling head containing a concentric knife and a plurality of deployable staples in concentric arrays on a tissue facing side of said stapling head;
c) a moveable shaft connecting the anvil and stapling head; and
d) an elongated hollow anvil sleeve having a flange at a proximal end thereof, said anvil sleeve open at a distal end thereof and at the proximal end thereof;
said flange positioned on the tissue facing end of the anvil against said staple bending zone;
wherein said distal end of said anvil sleeve is releasably disposed in said circumferential recess,wherein said anvil sleeve, said circumferential recess, and said circumferential entrance are configured to avoid any interference and any contact of the anvil sleeve with the concentric knife moving against and within circular knife recess.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to surgical instruments and methods for enhancing properties of tissue repaired or joined by surgical staples and, more particularly to surgical instruments and methods designed to enhance the properties of repaired or adjoined tissue at a target surgical site, especially when sealing an anastomosis between adjacent intestinal sections so as to improve tissue viability, prevent tissue infection, and to prevent leakage. The present invention further relates to circular stapling instruments and elongated tubular hollow sleeves deployed from such stapling instruments and establishing an enclosure around the stapled and resected tissues at the anastomotic joint.
0 Citations
20 Claims
-
1. A circular stapling instrument comprising:
-
a) an anvil having a tissue facing end and an opposite distal end; the anvil having a peripheral staple bending zone and a coaxial circular knife recess on said tissue facing end; the anvil having a circumferential recess formed inside said anvil, with a circumferential entrance into said circumferential recess positioned on said tissue facing end coaxially between the staple bending zone and the circular knife recess; b) a cylindrical stapling head mounted on a support shaft, said stapling head containing a concentric knife and a plurality of deployable staples in concentric arrays on a tissue facing side of said stapling head; c) a moveable shaft connecting the anvil and stapling head; and d) an elongated hollow anvil sleeve having a flange at a proximal end thereof, said anvil sleeve open at a distal end thereof and at the proximal end thereof; said flange positioned on the tissue facing end of the anvil against said staple bending zone; wherein said distal end of said anvil sleeve is releasably disposed in said circumferential recess, wherein said anvil sleeve, said circumferential recess, and said circumferential entrance are configured to avoid any interference and any contact of the anvil sleeve with the concentric knife moving against and within circular knife recess. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
6. (canceled)
Specification