Endoscopic ultrasonography puncture needle vacuum extractor device with quantitative control negative pressure

Abstract

The invention relates to an endoscopic ultrasonography puncture needle vacuum extractor device with quantitative control negative pressure. The vacuum extractor device comprises a push-pull rod, a piston, an extractor body, a fixing joint and a connection joint; the fixing joint is arranged at one upper end of the extractor body of which the other end is provided with the connection joint; the connection joint is provided with a one-way valve; the extractor body is marked with a calibrated scale; the piston is fixedly connected with one end of the push-pull rod of which the other end is fixedly connected with a handle; the push-pull rod is provided with a limiting lug; the fixing joint comprises a sleeve, a side wing, a connection hole and a limiting clamping slot matched with the limiting lug on the push-pull rod. The endoscopic ultrasonography puncture needle vacuum extractor device with the quantitative control negative pressure has the advantages that the size of negative pressure can be quantitatively controlled, the negative pressure of different sizes can be used for the puncture needle to extract different focus tissues to enable the focus tissues to be fully extracted, incomplete extracting due to overlarge or oversmall negative pressure is avoided, operation difficulty is reduced, operation is simple and a puncture needle is stable in angle and depth.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a negative pressure aspirator device for ultrasonic endoscopic puncture needle with quantitative control of negative pressure Background technique [0002] Gastrointestinal submucosal tumors, such as stromal tumors, lymphomas, hemangiomas, etc., often require repeated biopsies, but conventional endoscopic diagnosis is difficult and the diagnosis rate is not high. With the development of modern technology, ultrasound diagnosis has been combined with endoscopy, allowing doctors to use endoscopy to diagnose smaller and early lesions in the human cavity. The accuracy of any imaging diagnosis cannot be compared with the direct pathological examination of human tissue. Therefore, even if the ultrasound endoscope enters the human body and finds a site that may become a lesion, the doctor still hopes to take advantage of the clamp channel of the endoscope. , Obtain the living ti...

AI Technical Summary

Problems solved by technology

[0004] First of all, for convenience, doctors usually use a syringe to connect the puncture needle, and use the negative pressure of the syringe to aspirate the puncture needle. However, the negative pressure formed by the syringe is relatively simple, which can only be controlled qualitatively, not quantitatively. For tissues of different lesions , the required suction force is different. If the negative pressure formed by the syringe is used to aspirate the puncture needle, sometimes due to excessive negative pressure and strong suction force, excessive tissue is extracted, or sometimes due to excessive negative pressure. Small, the axial suction force is small, and the lesion tissue cannot be sucked;

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