Intracavitary straight-cutting push knife mechanism

Abstract

The invention relates to an intracavitary straight-cutting push knife mechanism. The intracavitary straight-cutting push knife mechanism is provided with a first cutting blade and a second cutting blade. One of the first cutting blade and the second cutting blade obliquely and downwards extends from front to back, and the other of the first cutting blade and the second cutting blade obliquely and upwards extends from front to back. The rear portion of the first cutting blade and the rear portion of the second cutting blade are intersected to form a V-shaped cutting edge. The intracavitary straight-cutting push knife mechanism uses the V-shaped cutting edge to conduct clipping-type cutting on the tissue. The V-shaped cutting edge structure can make the tissue closed up in the tissue cutting process. The tissue which is not cut off by the front cutting edge is pushed by the first cutting blade 101 and the second cutting blade 102 towards the root portion of the V-shaped cutting edge. Due to the fact that the tissue is already cut open by the first cutting blade 101 and the second cutting blade 102 in advance, the tissue can be easily cut off at the root portion of the V-shaped cutting edge. The percussion force required by forward cutting of the intracavitary straight-cutting push knife mechanism is decreased by adopting the structure, convenience is brought to operation performed by a doctor, and further the operation risk is reduced.

Description

technical field [0001] The invention belongs to the field of medical instruments, and in particular relates to a straight-cutting push-knife mechanism of a surgical stapler. Background technique [0002] The endoluminal linear cutting stapler is a device used in medicine to replace manual suturing. It is widely used in surgical operations for wound suturing, internal tissue suturing and cutting. A typical linear cutting stapler is disclosed in US Pat. No. 5,129,570. The main working principle is to use titanium nails to cut or anastomose tissues, similar to a stapler, to remove excess tissue while suturing the wound. This linear cutting stapler mainly relies on manual percussion to push the instrument to cut off and suture human tissue at present. This type of linear cutting stapler generally includes upper and lower jaws, and upper and lower closing handles for opening and closing the upper and lower jaws. A pusher rod and a cutter that are in the staple cartridge and can...

AI Technical Summary

Problems solved by technology

It has a particularly high requirement on the sharpness of the blade 201, which increases the difficulty of manufacturing and increases the production cost

In addition, since the blade 201 of the push knife 200 works vertically to the tissue, it will push the tissue forward while cutting, squeeze the tissue and deform it, and shorten the effective cutting length

And when the tissue to be cut is very thick, a large firing force is required to push the push knife 200, which brings inconvenience to the doctor's operation, and even the firing cannot be completed.

resulting in the failure of the operation

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