Integrated hole-opening knife and application method thereof

Abstract

The invention discloses an integrated hole-opening knife and an application method thereof used for cutting and opening holes of biological tissue and removing cut tissue at holes. The integrated hole-opening knife comprises a cylindrical knife and a grasping mechanism. The cylindrical knife, in the shape of a tube, comprises a far end having a cylindrical knife edge and a near end operated by a user in a hand-held mode. Accommodating space is formed in the interior of a cylinder of the cylindrical knife. A far end of the accommodating space is an opening where cut tissue is allowed to enter. The grasping mechanism is arranged in the cylindrical knife and completely accommodated in the accommodating space. When the cylindrical knife finishes cutting, the grasping mechanism drills into tissue and a channel in the same shape as the grasping mechanism is drilled in tissue. Extrusion press connection is achieved between the grasping mechanism and surrounding tissues. The cut tissue is further fixed and grasped. The grasping mechanism and the cut tissue are located in the accommodating space. The integrated hole-opening knife and the application method thereof have following beneficial effects: cut tissue does not drop down and can be completely taken out; tissue cutting contours are smooth; fine cylindricity of holes is obtained; after an operation, the integrated hole-opening knife easily withdraws; and the operation takes short time.

Description

technical field [0001] The invention relates to the field of surgical instruments, in particular to an integrated surgical perforation knife for opening holes in biological tissues such as myocardium and a method for using the same. Background technique [0002] With the improvement of medical level, surgical instruments have become more specialized and refined. There is a type of operation that requires opening holes in the human heart, stomach, bladder and other organs. For example, patients with heart failure can be treated with a ventricular assist device (blood pump). During the implantation of the ventricular assist device, a round hole needs to be made at the apex of the heart. The diameter of the hole matches the diameter of the inlet of the ventricular assist device. , in order to install the ventricular assist device on the human heart, and the quality of the myocardial opening is the key to the success of the implantation operation. [0003] In the past, for the ...

AI Technical Summary

Problems solved by technology

This operation method is inconvenient to operate, and the operation of tying the biological tissue with the medical thread is cumbersome, which requires a high level of operation of the doctor, and is prone to medical accidents; if the thread is not tied firmly, it is easy to cause the cut tissue to fall

[0004] Chinese patent CN201420479715.5 discloses a device for myocardial perforation. Its structure includes a handle, a positioner and a perforation knife. The lower end of the perforation knife is a cylindrical structure, and the lower end of the cylinder is a blade. The positioner There is a knife anvil at the lower end, and the knife anvil is set on the outside of the cylindrical blade. The method of use is to cut a cross groove at the opening of the heart with a scalpel, then insert the locator into the heart and hold it against the heart, and then Then cut with a cylindrical knife, and finally pull out the whole knife. The disadvantages are: (1) When the cone head of the locator is inserted into the ventricle through the cross groove, the myocardium needs to be squeezed away, so it requires a lot of force to insert, which is easy to insert. Cause ventricular fibrillation; (2) The diameter of the cone head of the locator is larger than the diameter of the cylindrical knife, causing unnecessary damage to the myocardium and easily deforming the incision hole; (4) After the cone head enters the heart, it is necessary to keep the handle still before proceeding Cylindrical knife cutting is difficult to operate; (5) The cone head is prone to deviation in the heart, causing the cylindrical knife to cut off

Images