Sutureless intestinal anastomosis gun

• US 5,464,415 A
• Filed: 03/15/1994
• Issued: 11/07/1995
• Est. Priority Date: 03/15/1994
• Status: Expired due to Fees

• Current Assignee: Te-Chuan Chen
• Original Assignee: Te-Chuan Chen
• Inventors: Chen, Te-Chuan
• Primary Examiner(s): Graysay, Tamara L.
• Assistant Examiner(s): SCHMIDT, JEFFREY
• Application Number:
  US08/213,130
• Time in Patent Office: 602 Days
• Field of Search: 606/153-156, 606/148, 606/150, 623/1, 623/12, 227/175, 227/179, 227/181, 227/19
• US Class Current: 606/153
• CPC Class Codes: A61B 17/1114 of the digestive tract, e.g. bowels or oesophagus
• CPC Class Codes: A61B 17/1155 Circular staplers comprising a plurality of staples

Abstract

Directing to the difficulties involved in the deep rectal surgery, the present invention relates to a sutureless intestinal anatomosis gun which facilitates the rectal surgery to be performed by entering through the anus and protruding out from the upper end of rectum so as to install an anastomosis ring that has been connected to the intestine for anastomosis of the rectum, comprising a plurality of tubes, an anastomosis ring seat, a fixed shaft, a screw rod and a nut. During the operation of intestinal anastomosis, the inner sleeve and the anastomosis ring seat can be driven in sequence by means of the nut and the screw rod such that the end of the rectum is pushed precisely to enter into the gap of the anastomosis ring and then the anastomosis ring is precisely closed. Thereafter, the anastomosis ring seat and the anastomosis ring are disengaged and then the said anastomosis gun is removed to complete the intestinal anastomosis.

Claims

1. A sutureless, intestinal anastomosis gun for an anastomosis ring, comprising:

a housing comprising an outer tube portion having first and second ends and a tube body portion having first and second ends, the first end of the outer tube portion being connected to the first end of the tube body portion, and being larger in diameter than the tube body portion, and the tube body portion being longer in length than the outer tube portion;

a guide head in the shape of a smooth conic housing fitted over the second end of the outer tube portion for inserting into the rectum through the anus;

a nut mounted on the second end of the tube body portion opposite the outer tube portion;

a lining tube having an upper end and a lower end, the lining tube being fitted inside the outer tube portion, the upper end of the lining tube being adjacent to the second end of the outer tube portion and being formed into a stop edge;

a filler plate threaded at the lower end of the lining tube;

an anastomosis ring seat having an upper end and a lower end, the lower end being formed into a flange for mounting in the lining tube and the upper end being divided into a number of segments by the same number of grooves, such that the diameter of the upper end of the ring seat can be altered;

a spring mounted between the flange and the filler plate in the lining tube;

a movable shaft mounted in the housing and having upper and lower ends, the upper end extending through the filler plate and the lower end being connected to the lower end of the anastomosis ring seat, the movable shaft being provided with an elongated slit;

a fixed shaft mounted in the movable shaft and having upper and lower ends, the lower end of the fixed shaft being affixed to the outer tube portion and the upper end of the fixed shaft forming a restricting head so as to restrict the size of the upper end of the anastomosis ring seat;

a screw rod located in the tube body portion and having upper and lower ends, the upper end being connected to the movable shaft and the lower end being threaded to the nut;

whereby, in use, intestinal anastomosis can be performed by threading a screw through the elongated slit of the movable shaft to the fixed shaft therein, thus allowing linear movement, so that during operation, when the nut is rotated, the lining tube is retracted relative to the outer tube portion and then the anastomosis ring seat is retracted relative to the lining tube under the action of the spring, so as to push the end of the rectum into the gap of the anastomosis ring, whereafter the anastomosis ring is snapped closed and the gun is then disengaged from the anastomosis ring.