Puncher and operation method thereof

Abstract

The invention relates to a puncher and an operation method thereof, the puncher comprises a knife rest, a driving part, a cutting assembly and a pressing assembly, the driving part is provided with a through part which is at least partially and movably arranged on the knife rest, the near end of the pressing assembly is movably arranged on the cutting assembly, and the far end of the pressing assembly is arranged on the outer side of the knife rest; and when the driving piece moves, the pressing assembly is driven to axially move relative to the tool rest. The elastic piece is arranged on the outer side of the second shaft, so that the tool apron can automatically rebound under the deformation action of the elastic piece after penetrating through cut tissue, and the cut tissue is pressed. The first limiting part and the second limiting part abut against each other to limit the axial movement of the first shaft but not limit the axial movement of the first shaft along with the rotation of the driving part, so that the pressed human tissue is uniformly cut off, the shape of an incision is guaranteed, and a doctor does not need to carry out secondary trimming.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a puncher and an operating method thereof. Background technique [0002] At present, soft tissue (including cardiac tissue) needs to be punched in surgical operations. For example, when a ventricular assist device is implanted into the human body, it needs to punch a hole at the apex of the heart. The diameter of the hole to be punched matches the diameter of the ventricular assist device inlet, so that The ventricular assist device is installed on the human heart, and the quality of the opening is the key to the success or failure of the implantation operation. [0003] The existing surgical instruments used for perforating human tissue have the following three types and have the following problems: [0004] (1) The first type adopts the pull-back punching method. This surgical instrument relies on the push-pull rod on the instrument to drive the cutter head to move...

AI Technical Summary

Problems solved by technology

[0004] (1) The first type adopts the pull-back punching method. This kind of surgical instrument relies on the push-pull rod on the instrument to drive the knife head to move back and forth and half squeeze and half cut the heart tissue to complete the resection of human tissue. However, because the heart tissue is Elastic, stretchable and contractible, so in the process of semi-squeezing, the heart tissue is often passively deformed, creased or laminated, resulting in irregular and uneven incisions for subsequent resections, and doctors have to use surgical scissors for secondary trimming , which prolongs the operation time and increases the intraoperative risk of the patient

[0005] (2) The second type of surgical instrument uses the method of rotating the cutting head to puncture the hole, and it uses the above-mentioned method to make the cutting head rotate into the inside of the cut tissue and create a squeeze connection relationship with the cut tissue, but this method It is easy to puncture at the tip of the knife, but the extrusion of human tissue in areas other than the tip of the knife will consume the user's time and energy, so its efficiency is low during the operation against time, and the tissue containment space in the surgical instrument It is semi-open, so that the resected tissue will have the risk of falling, affecting the treatment of patients

[0006] (3) In addition, there is also a surgical instrument that relies on the cylindrical knife to slide and rotate in the axial direction of the installation cylinder, so that the cylindrical knife can perform cutting work, and it has increased an expandable part, which can be squeezed to make the expandable part The expansion part expands to the peripheral side, and the human tissue can be fixed by using the expanded expandable part, but the heavy structure is complicated, and the expandable part has the risk of failure and fracture due to the elastic deformation of the parts

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