Low-temperature cold knife for laparoscopic surgery

Abstract

The invention relates to the technical field of medical instruments, in particular to a low-temperature cold knife used in the abdominal cavity in the laparoscopic surgery process. Electrosurgical equipment currently used has the shortcomings that due to the effect of converting high-frequency discharge electric energy into heat energy, heat injury of surgical wound tissue is caused, and it is not good for healing of surgical wounds and pregnancy in the future. The low-temperature cold knife for the laparoscopic surgery is composed of a knife rod telescoping guide system, an automatic resetting and rebounding system, a controlling and grading system, a radial rotation preventing system, a blood clearing and recovering system and a blade low-temperature cooling system. By adjusting a telescopic knife rod 18, a surgical blade 10 can be arranged at an assembly and disassembly position or a work position or a protection position and is hidden when entering the abdominal cavity, and accidental injury is prevented.

Description

1. Technical field [0001] The invention relates to the technical field of medical instruments, in particular to a surgical cold knife used in the abdominal cavity during laparoscopic surgery. 2. Background technology [0002] Laparoscopic technology has been developed rapidly in the past 20 years because of its advantages of less trauma, less pain and faster recovery. Especially with the wide application of electrosurgical instruments and continuous improvement of surgical techniques, some contraindications to laparoscopic surgery in the past, such as obesity, thinness, advanced age, and history of multiple pelvic and abdominal operations, are no longer restricted. Endometrial cancer (EC), cervical cancer (SCC), ovarian cancer (OC), severe pelvic and abdominal adhesions, pelvic abscess, hemorrhagic shock and other diseases are gradually treated with laparoscopic surgery, and good results have been achieved. For patients who have adenomyoma affecting fertility and require fe...

AI Technical Summary

Problems solved by technology

However, electrosurgical instruments have common disadvantages, that is, due to the high-frequency discharge, the heat energy transformed by the current acts on the surgical tissue, which will cause thermal damage to the surgical wound tissue, which is not conducive to wound healing and subsequent pregnancy.

Chongqing University application number 201010204079.1, application number publication number CN101869507A invention patent "in vivo minimally invasive freezing scalpel", adopts the method of alternating nitrogen freezing and hot water melting, so that the internal tissues can be alternately cooled and heated at -196-45 degrees Under the action, the diseased tissue will be necrotic, and the surgical wound tissue will also be damaged. If it is applied to laparoscopic surgery, it is also not conducive to wound healing and subsequent pregnancy.

Nanjing Qinhuai Hospital's application number 201310508525.1, the invention patent of application number CN103519868A "a casing scalpel", only the blade expands and contracts in the casing, which can only solve the problem of extension of the scalpel, regardless of whether the blade is extended or retracted. In most cases, the surgical blade is always exposed outside the cannula, if it is used in laparoscopic surgery, it is easy to cause accidental injury

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