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Method for preparing disposable minimally invasive surgical scissor blades

A minimally invasive surgery, scissors blade technology, applied in surgical scissors and other directions, can solve the problems of cumbersome disinfection process, high preparation cost, cross-infection, etc., and achieve the effects of high raw material utilization, high degree of automation, and large output

Active Publication Date: 2012-02-01
HUNAN HANDLIKE MINIMALLY INVASIVE SURGERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the surgical scissors used in China are imported and reused. The import price is expensive, the disinfection process is cumbersome, and there is a hidden danger of cross-infection due to repeated use; while the domestic surgical scissors, the key components of the scissor blades use traditional However, due to the high hardness and complex shape of the scissors, the processing is difficult, and the subsequent processing is cumbersome, so the preparation cost is high and time-consuming, and it cannot be mass-produced
[0004] With people's higher requirements for health, minimally invasive surgery will be fully popularized, and the one-time promotion of minimally invasive surgical scissors that are in direct contact with human tissue during surgery will become an inevitable trend. contradiction

Method used

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  • Method for preparing disposable minimally invasive surgical scissor blades
  • Method for preparing disposable minimally invasive surgical scissor blades

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] a, with the 17-4PH stainless steel spherical powder with an average particle size of 8um as raw material, a disposable minimally invasive surgical scissors blade is prepared;

[0022] B, preparation of binding agent: by weight percentage, get polyethylene glycol 30%, vegetable oil 5%, polyethylene 35%, plasticizer 5%, paraffin 25%, put in blade mixer, at 150 ℃ Mix at high temperature for 1h;

[0023] c. Preparation of feed: the binder and 17-4PH stainless steel spherical powder are mixed in a mixer at 180°C for 2 hours at a volume ratio of 50%;

[0024] d. Injection molding: put the above-mentioned mixture in the injection molding machine, at an injection temperature of 185°C, an injection pressure of 90MPa, and an injection speed of 2cm 3 / s, under the condition of mold temperature 110℃, it is processed into a blank;

[0025] e. Degreasing: first put the blank in dichloromethane to dissolve the paraffin and vegetable oil components; then in an argon atmosphere, heat ...

Embodiment 2

[0029] a, the 440C stainless steel spherical powder with an average particle size of 8um is used as a raw material to prepare disposable minimally invasive surgical scissors;

[0030] B, the preparation of binding agent: by weight percentage, get polyethylene glycol 30%, vegetable oil 10%, polyethylene 30%, plasticizer 5%, paraffin 20%, put in blade type mixer, at 180 ℃ Mix at high temperature for 1.5h;

[0031] c. Ingredients: The binder and 440C stainless steel spherical powder are fed according to the volume ratio of 55%, and then mixed in a mixer at 185°C for 2 hours.

[0032] d. Injection molding: put the above-mentioned mixture in an injection molding machine, with an injection temperature of 185°C, an injection pressure of 80MPa, and an injection speed of 2cm 3 / s, processed into blanks at a mold temperature of 100°C;

[0033] e. Degreasing: first place the blank in dichloromethane to dissolve the paraffin and vegetable oil components; then in an argon atmosphere, hea...

Embodiment 3

[0037] a, the 17-4PH stainless steel spherical powder with an average particle diameter of 9um is used as a raw material to prepare disposable minimally invasive surgical scissors;

[0038] B, preparation of binding agent: by weight percentage, get polyethylene glycol 10%, vegetable oil 25%, polyethylene 35%, plasticizer 10%, paraffin 20%, put in blade mixer, at 140 ℃ Mix at high temperature for 2h;

[0039] c. Preparation of feed: the binder and 17-4PH stainless steel spherical powder are mixed in a mixer at 140°C for 3 hours at a volume ratio of 40%;

[0040] d. Injection molding: put the above-mentioned mixture in the injection molding machine, with an injection temperature of 145°C, an injection pressure of 120MPa, and an injection speed of 3cm 3 / s, under the condition of mold temperature 80℃, it is processed into blank;

[0041] e. Degreasing: first place the blank in dichloromethane to dissolve the paraffin and vegetable oil components; then in an argon atmosphere, he...

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Abstract

The invention discloses a method for preparing disposable minimally invasive surgical scissor blades, which comprises the following steps of: mixing a stainless steel powder substrate material and a binder, pelletizing to obtain uniform feed, injecting the feed by a powder injection molding technology to obtain an injection blank of the scissor blades, removing the binder by a degreasing process,sintering the degreased blank, and performing heat treatment strengthening to obtain disposable minimally invasive surgical scissor blade products. The minimally invasive surgical scissor blades are prepared by the powder injection molding technology, shapes can be formed at one time, a process for mass production through a mold is adopted, the automation degree, performance and yield are high, subsequent processing is not needed, the utilization rate of raw materials is high, and cost is low, so that one-time popularization of minimally invasive surgical scissors can be realized.

Description

technical field [0001] The invention relates to a method for preparing scissors, in particular to a method for preparing disposable minimally invasive surgical scissors. Background technique [0002] Minimally invasive medical treatment is to excise the lesion or repair the defect under the view of the monitor through a natural or keyhole-sized percutaneous hole. It is necessary to safely perform separation, cutting, hemostasis, suturing and some special operations. Compared with traditional surgery, minimally invasive treatment has great advantages, mainly reflected in short operation time, less trauma to patients, less scars, less postoperative pain, faster recovery and high safety. Although minimally invasive surgery was only introduced in 1989, it has become the leading trend in surgery. It has been popularized in all developed countries, and it has been carried out in most hospitals above the county level in our country. [0003] Minimally invasive surgical scissors—...

Claims

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Application Information

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IPC IPC(8): B22F3/22A61B17/3201
Inventor 邓忠勇李益民雷浩沈红仁朱彩强
Owner HUNAN HANDLIKE MINIMALLY INVASIVE SURGERY CO LTD
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