STAPLER FOR MUCOSECTOMY

• US 20100213239A1
• Filed: 03/07/2007
• Published: 08/26/2010
• Est. Priority Date: 03/07/2007
• Status: Active Grant

• Current Assignee: Covidien AG (Medtronic Plc)
• Original Assignee: Covidien AG (Medtronic Plc)
• Inventors: Rebuffat, Carlo, Rebuffat, Piera, Rebuffat, Franca, David, Dante
• Granted Patent: US 8,272,555 B2
• Time in Patent Office: Days
• US Class Current: 227/180.100
• CPC Class Codes: A61B 17/115 Staplers for performing anastomosis in a single operation
• CPC Class Codes: A61B 17/1155 Circular staplers comprising a plurality of staples
• CPC Class Codes: A61B 17/3423 Access ports, e.g. toroid shape introducers for instruments or hands access sites for liquids A61M39/0247
• CPC Class Codes: A61B 2017/00269 endoscopic mucosal resection EMR
• CPC Class Codes: A61B 2017/1142 Purse-string sutures
• CPC Class Codes: A61B 2017/2901 Details of shaft

Abstract

The head of a stapler for mucosectomy comprises an external goblet-shaped body (1) wherein an internal goblet-shaped body (2) is concentrically and slidingly located, at the edge of which a circular blade (3) is fixed. The internal goblet-shaped body (2) is provided with a central hole (5) wherein a rod (6) is slidingly inserted, at the end (7) of which an anvil (8; 8′) is fixed. One or more annular grooves (11), which are parallel and suitably spaced one from the other, are formed on the lateral surface of the rod (6) perpendicularly to the axis thereof. Said grooves (11) are intended to receive a portion of mucosa (9a) which is included in a purse string suture as the mucosa is tied around the rod (6). By retracting the rod (6) in the central hole (5) of the stem (2a) of the internal goblet-shaped body (2) the mucosa to be removed is carried into the internal goblet-shaped body (2). The anvil (8; 8′) and the circular blade (3) are moved closer one to the other, by suitable means, in order to cut the tissues when the stapler is in a closed position.

Claims

1. A stapler for mucosectomy, comprising:

a stapler head comprising at least one goblet-shaped body provided with a central hole wherein a rod is slidingly inserted,

an anvil attached to an end of said rod opposite to said central hole,

a plurality of annular grooves positioned on the lateral surface of the rod and perpendicularly to the axis thereof, the annular grooves being exactly spaced one from the other and suitable to receive a portion of mucosa to be tied around the rod in a purse string suture in correspondence of one of said grooves located at different distances from the anvil, whereby different amounts of mucosa can be exactly removed.

2. The stapler according to claim 1, wherein the rod comprises three annular grooves.

3. The stapler according to claim 2, wherein the three annular grooves are arranged at 10, 20 and 30 mm from the anvil, respectively.

4. The stapler according to claim 1 wherein depth of the annular grooves is comprised between 0.5 mm and 3 mm.

5. The stapler according to claim 4, wherein depth of the annular grooves is equal to 1 mm.

6. The stapler according to claim 1, wherein the cross section of the rod is circular.

7. The stapler according to claim 1, wherein each annular groove consists of a cylindrical surface having a smaller diameter than the remaining lateral surface of the rod and is connected by a fillet surface to the lateral surface of the rod.

8. The stapler according claim 7, wherein the radius of the fillet surface between the cylindrical surface and the remaining lateral surface of the rod is 1 mm.

10. The stapler according to claim 1, wherein the at least one goblet-shaped body comprises an external goblet-shaped body and an internal goblet-shaped body, the internal goblet-shaped boy being smaller than the external goblet-shaped body and concentric with the external goblet-shaped body, wherein the central hole in which the rod is slidingly inserted is provided in the internal goblet-shaped body.

11. The stapler according to claim 10, further comprising a circular blade connected with an edge of the internal goblet-shaped body.

9. (canceled)