Arc-shaped cutting anastomat

Abstract

The invention relates to an arc-shaped cutting anastomat comprising an anastomosis nail shaping mechanism, a nail pushing assembly, a trigger handle, a nail supporting seat, a base of the nail supporting seat, a knife cushioning ring and two splints, wherein the nail pushing assembly comprises a cutting knife, a nail pushing sheet, a nail bin and a guide post; the end of the nail pushing sheet and both sides of the cutting knife are respectively provided with a plurality of inner nail pushing dental sheets which are near the cutting knife and a plurality of outer nail pushing dental sheets which are far away from the cutting knife; the cutting knife and the nail pushing sheet are injected and molded at a time to be fixed together; the outer side of the each outer nail pushing dental sheet on the nail pushing sheet is provided with a reinforcing rib; the inner side of each nail pushing dental sheet on the nail pushing sheet is provided with a reinforcing rib; both ends of the first guide surfaces of the nail pushing dental sheets are respectively connected with the first contact surfaces and the second contact surfaces of the nail pushing dental sheets through concave arc-shaped connecting surfaces, and both ends of the second guide surfaces thereof are respectively connected with the first contact surfaces and the second contact surfaces through the concave arc-shaped connecting surfaces; and the first contact surfaces and the second contact surfaces are respectively in contact with the inner walls of the nail pushing dental sheet holes of the nail bin. The invention has the advantages of good trigger anastomosis shaping effect and high safety.

Description

technical field [0001] The invention belongs to the technical field of medical instruments, in particular to an arc cutting stapler. Background technique [0002] There are various types of staplers on the market, which are widely used in surgical operations to anastomose various parts of the human body, which can reduce operation time and improve operation quality. The anastomosis is firm and reliable, and the hemostatic effect is good. At present, the disposable curved cutting stapler is mainly suitable for low anterior rectal resection. There are certain disadvantages in the existing arc-shaped cutting stapler: first, the cutting knife is fixed on the knife seat, and the knife seat is fixedly connected with the pusher piece. The three of them need to move forward synchronously, because there is a gap between the assembled nail pusher and the knife seat, which will cause the movement of the nail pusher, cutting knife and knife seat to be out of sync or cause the cutting k...

AI Technical Summary

Problems solved by technology

There are certain disadvantages in the existing arc-shaped cutting stapler: first, the cutting knife is fixed on the knife seat, and the knife seat is fixedly connected with the pusher piece. The three of them need to move forward synchronously, because there is a gap between the assembled nail pusher and the knife seat, which will cause the movement of the nail pusher, cutting knife and knife seat to be out of sync or cause the cutting knife to not completely cut off the tissue. Phenomenon; and because the workpieces of the nail pusher, cutting knife and knife seat are small, the assembly is difficult. If the nail pusher, cutting knife and knife seat are not assembled firmly, the cutting knife may shake when cutting tissue , and lead to phenomena such as oblique cutting or incomplete cutting of tissue; on the other hand, during the operation of the doctor, the resistance generated by the pusher piece when pushing the staple to penetrate the tissue may cause the pusher teeth at the end of the pusher piece to break down. In practice, it is very difficult to ensure the strength of the push-pin teeth, which often results in poor firing and anastomotic molding effects, which greatly reduces the safety of the operation; thirdly, the surfaces of the inner and outer push-pin teeth are respectively in line with the corresponding The holes of the pusher teeth of the staple cartridge are all in contact, that is, the four surfaces of the inner and outer pusher teeth corresponding to the first guide surface, the second guide surface, the first contact surface and the second contact surface are all in contact with the pusher teeth. The inner wall of the hole is in contact. This structure has a large contact area, and the friction increases. At the same time, the force used to push the nail plate increases, which is inconvenient for firing.

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