an aspirator

Abstract

The invention discloses a uterine suction device, which includes a connecting pipe, a holding shell, a barrel body, a position-limiting base and a handle; wherein, a closing key and a releasing key are arranged on the surface of the holding shell; A piston, a piston connecting column, a clamping plate and a pull rod bolt are arranged in sequence. The uterine suction device provided by the present invention has the advantages of wide adaptability, high accuracy of uterine suction negative pressure, visual measurement of uterine suction negative pressure, precise control and adjustment of uterine suction negative pressure, stable and reliable negative pressure locking structure, and higher safety. , Tie rod bolt can be bent and double valve key cooperation and many other technical advantages.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a uterine suction device. Background technique [0002] As we all know, induced abortion is a remedial measure after contraceptive failure, mainly including traditional negative pressure uterine aspiration and medical abortion; [0003] However, the negative pressure suction devices used by people for artificial abortion are generally electric negative pressure suction devices and traditional manual negative pressure suction devices; Into the uterus, directly contacting the tissue on the endometrium, through the negative pressure suction operation, the embryonic tissue can be sucked out of the uterus to achieve the purpose of terminating pregnancy. [0004] But the traditional manual negative pressure suction device wherein (for example: a kind of needle tube type manual negative pressure suction device that the patent application number is 200920158735.1) it mainly ...

AI Technical Summary

Problems solved by technology

[0005] The first aspect of the problem: the barrel of the traditional negative pressure suction device lacks a negative pressure scale line, its negative pressure accuracy is poor, it is difficult to achieve accurate negative pressure absorption control, and medical staff often can only judge the current operating time through experience The size of the negative pressure; at the same time, in the specific operation, the suction can only be performed according to the maximum negative pressure each time, and the selection and adjustment of different negative pressures cannot be realized.

Obviously, since human embryonic tissue grows after 5-6 weeks and after 8-10 weeks of growth, there is a big difference in the size of the embryonic tissue, the amount of uterine suction is different, and the maximum negative pressure required for uterine suction is also different. It is completely different; and in different stages of negative pressure aspiration, the requirements for negative pressure are also different. If traditional negative pressure aspirators are used, the adaptability and adjustment ability are poor, and it is impossible to achieve different pregnancy cycles. Specific vacuum suction operations are performed at different stages of the operation, so the use of traditional vacuum suction devices tends to cause endometrial damage due to excessive suction, or lead to incomplete abortion

In addition, the maximum suction negative pressure of the traditional negative pressure uterine suction device is about 375mmhg, which can only be applied to patients with unintended pregnancy at 5-7 weeks, and cannot be used for patients with unintended pregnancy at 8-10 weeks, because its The maximum negative pressure of uterine suction is still not up to the relevant technical requirements

[0006] The problem of the second aspect; the traditional negative pressure suction device adopts the valve design that the inclined plane limit is stuck (that is, referring to the structure of a needle tube type manual negative pressure suction device with the patent application number 200920158735.1, which has a switch button with a lock (that is, the valve structure) passes through the lower opening, passes through the upper opening, and clamps the lower opening through the raised slope at the bottom of the switch button to implement closure), but this traditional valve design valve locking stability and reliability Poor, easy to fall off, resulting in unstable locking of the valve against negative pressure; at the same time, medical staff can easily accidentally touch the valve and cause the inclined surface to get stuck. At this time, the valve rebounds and instantly changes from negative pressure to positive pressure. The effusion will be quickly returned to the uterus together with the air, which will cause damage to the blood vessels on the endometrium and the endometrium. In severe cases, it will cause air embolism and endanger the life of the patient.

Therefore, the reliability of the negative pressure locking valve of the traditional vacuum suction device is poor, which leads to safety problems of the negative pressure suction device

[0007] The third problem: the pull rod plug inside the traditional negative pressure suction device will be pulled out a certain distance when the negative pressure is used to attract embryonic tissue, and the medical staff can easily touch the pull rod plug during operation, causing Pollution; Many doctors have also reported that the length of the lever bolt of the traditional negative pressure suction device is too long during operation, which is not only inconvenient to operate, but also easily causes the lever bolt, handle and other parts to touch the clothes, resulting in bacterial contamination. Therefore, how to design to reduce the operation time? The total length of the device will be a key technical problem

[0008] The fourth aspect of the problem: the above-mentioned traditional negative pressure suction device adopts a single valve structure design and the operation mode of pushing forward or backward after pressing. fail, cause an accident

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