Veress needle for air bag indication and positioning

Abstract

The invention discloses an airbag indicating and locating pneumoperitoneum needle. The airbag indicating and locating pneumoperitoneum needle comprises an outer needle, an inner core and a needle sheath for fixing the outer needle, an opening is formed in the rear end of the needle sheath, the rear end is provided with an elastic airbag, a rotary valve is arranged between the opening and cavity of the needle sheath, the needle sheath is communicated with the cavity through the rotary valve, the rotary valve comprises a barrel body integrated with the needle sheath and a valve body firmly matched in the barrel body, a rotating handle is arranged at one end of the valve body, the other end extends out of the barrel body to form a joint, the valve body is provided with a first passage and a second passage corresponding to the opening of the needle sheath, wherein one end of the second passage is opened, and the opening at the other end of the joint is communicated with the cavity to form the second passage when the first passage is closed. The airbag indicating and locating pneumoperitoneum needle is improved based on an existing pneumoperitoneum needle, the carbon dioxide feeding mode is changed, and the existing method for detecting whether the pneumoperitoneum needle enters the abdominal cavity is changed. By means of the airbag indicating and locating pneumoperitoneum needle, an operator does not need to prepare an injector for injecting normal saline and only needs to use air. The improved rotary valve is convenient for communicating with carbon dioxide, and the valve is very convenient to switch.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a laparoscopic operation Veress needle for positioning by an air bag. Background technique [0002] Veress needle is a surgical instrument used in laparoscopic surgery to judge whether the needle insertion position is correct and to inflate carbon dioxide gas to form pneumoperitoneum. The existing needle includes a needle body and an air inlet channel at the rear end of the needle body. The operation during use is as follows: [0003] First, insert the Veress needle into the abdominal cavity vertically from the umbilicus, and judge whether the Veress needle enters the abdominal cavity according to the experience of the surgeon and the breakthrough feeling when inserting the needle. If the former cannot be clearly judged, then use the hanging drop method to judge, that is, draw physiological saline with a 5ml syringe, connect it to the air inlet channel at the rear end of the V...

AI Technical Summary

Problems solved by technology

The disadvantage of this design is that there is no objective and clear indicator for judging whether the Veress needle enters the abdominal cavity, which is difficult for beginners to grasp, and it is easy to cause the needle to be inserted too deep or too shallow, and if it is too deep, it will stab the abdominal organs or even enter the peritoneum If the posterior space is too shallow, carbon dioxide gas will be injected into the skin, forming subcutaneous emphysema

The hanging drop method is not the gold standard. If the Veress needle enters the hollow viscera, the saline in the syringe will also be reduced, and this method is cumbersome, time-consuming and labor-intensive.

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