Negative-pressure endometrial sampling device

Abstract

The invention discloses a negative-pressure endometrial sampling device, which comprises a sleeve, wherein the top end of the sleeve is represented as a spherical top; a partition board is arranged inside the sleeve; a plurality of air vents are formed in the partition board; by virtue of the partition board, the inner cavity of the sleeve is divided into a ventilation cavity and a sampling cavity; the side, in the sampling cavity, of the top end of the sleeve is formed with a sampling opening, and a switch valve is arranged at the lower end of the sampling cavity; a fixed plate is arranged at the lower end of the ventilation cavity; an elastic hollow ball is arranged below the fixed plate; a first check valve is arranged on the fixed plate; the inlet of the first check valve communicates with the ventilation cavity and the outlet of the first check valve communicates with the hollow inner cavity of the elastic hollow ball; a second check valve is arranged at the upper end of the elastic hollow ball; the inlet of the second check valve communicates with the hollow inner cavity of the elastic hollow ball; and the outlet of the second check valve communicates with atmosphere. The sampling device disclosed by the invention is unnecessary to dilate cervix uterus and is relatively low in compression force on the uterine wall of a patient; the sampling device is capable of reducing injury on the uterus of the patient and is capable of forming stable and continuous negative pressure by continuously squeezing the elastic hollow ball; and the sampling device is high in sampling amount and is good in sampling effect.

Description

technical field [0001] The invention relates to the technical field of medical appliances, in particular to a negative pressure endometrium sampler. Background technique [0002] Patients with suspected endometrial cancer and endometrial lesions need to obtain endometrial samples for pathological examination before diagnosis. At present, when obstetricians and gynecologists do endometrial pathological examination, they mostly use curettage to sample During curettage, a metal endometrial curette is mostly used. The scraping head is spoon-shaped or spoon-shaped. During operation, insert the endometrial curette along the direction of the cervix from the cervix to the bottom of the uterus, and stick to the uterine wall from top to bottom. Scrape down to obtain endometrial specimens. There are following problems in the existing method of adopting endometrial curette to carry out endometrial sampling: one, the uterine curette has a large caliber, and the cervix needs to be expand...

AI Technical Summary

Problems solved by technology

There are following problems in the existing method of adopting endometrial curette to carry out endometrial sampling: one, the uterine curette has a large caliber, and the cervix needs to be expanded before curettage, which causes great pain to the patient and easily causes cervical Injury; 2. When using a curette, the medical operator needs to use a lot of force. The curette has a greater pressure on the uterine wall, which causes greater damage to the uterine wall, more bleeding, and greater pain for the patient. What is more serious is that if the medical staff Improper operation can easily cause the patient's uterus to perforate, cause massive bleeding, and lead to life-threatening

In view of the above situation, an endometrial sampler is often used now, and an overtube is often used. There are multiple suction holes on the overtube, and a piston is arranged in the overtube. The negative pressure can be formed by the piston moving up and down to obtain the endometrium. The advantage is that the diameter of the tube is small, there is no need to dilate the cervix, the damage is small, and the patient suffers less pain. The disadvantage is that the negative pressure is small and unstable, the amount of endometrial tissue obtained is small, and the sampling limit is not comprehensive

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