Design of Automatically Protective Laparoscopic Puncture

The first thing of doing laparoscopic surgery is to puncture the abdominal wall, it depends on the clinical experience. However, there will be differences in individual patients, so experience alone will cause puncture failure or puncture too deep to injuries internal organs. This paper presents an automatically protective method of puncture abdominal. Implementation method is: measure the air pressure of puncture carbon dioxide channel, judge the puncture whether penetrate abdominal or not by the diversification of the air pressure, open the electromagnetic lock immediately when detected puncture through the abdominal cavity, make the needle core retracted to puncture tube under the pressure of the spring. We choose MPX5050 which made by Motorola as the pressure sensor, selected MSP430F135 as microcontroller in this article. Studies show that the proposed automatic protection of abdominal puncture technique is simple, safe, has great practical value.