Hystero cavity tissue aspirator

Abstract

The hystero cavity tissue aspirator includes one miniature peristaltic pump and one duct. The peristaltic pump has control circuit comprising CPU with one write in memory; rectifier and power source circuit; input and display circuit comprising buttons, digital display, line scan driver and shift register; motor drive circuit comprising one bi-directional SCR and one thyristor; and negative control circuit comprising pressure sensor, differential amplifier and voltage / frequency converter. After the CPU outputs the motor controlling signal, the motor rotates for artificial abortion operation. During the operation, the time and negative pressure are displayed automatically, the negative pressure may be regulated and maintained automatically, the process is recorded automatically and the machine may be stopped automatically if necessary. The present invention has raised operation safety and success ratio.

Description

[technical field] [0001] The invention provides an electronic, intelligent and miniaturized intrauterine tissue suction surgical instrument, which is used for gynecological curettage and early pregnancy artificial abortion. [Background technique] [0002] One of the commonly used methods of clinically terminating early pregnancy is artificial abortion, that is, negative pressure suction tube. Whether this kind of drainage operation is manual or electric, the change of negative pressure cannot be controlled. When the negative pressure is too large, reflux will occur; when the negative pressure is insufficient, it cannot completely abort. Therefore, the straw is often inserted into the uterine cavity many times, which is prone to infection, or the embryonic tissue is not completely removed. In order to overcome this problem, the applicant once conceived to combine a miniature peristaltic pump with a catheter to design an anti-early pregnancy device (refer to Chinese patent 01...

AI Technical Summary

Problems solved by technology

This kind of drainage operation, whether it is manual or electric, cannot control the change of negative pressure. When the negative pressure is too large, reflux will occur; when the negative pressure is insufficient, it cannot completely abort.

Therefore, the straw is often inserted into the uterine cavity many times, which is prone to infection, or the embryonic tissue is not completely removed.

In order to overcome this problem, the applicant once conceived to combine a miniature peristaltic pump with a catheter to design an anti-early pregnancy device (refer to Chinese patent 01252870.6). Although the miniature peristaltic pump belongs to miniaturization, it was originally used for laboratory pumping, Oxygen pumping, the working pressure range fluctuates between 0 and 760 mm Hg, and cannot be controlled and adjusted

However, the individual differences of artificial abortion patients are very large. Simply using a peristaltic pump to perform drainage surgery cannot realize electronic and intelligent automatic control and adjustment of negative pressure, which will eventually lead to unsatisfactory surgical results.

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