Lumbar spinal needle capable of preventing liquid leakage

Abstract

The invention relates to a lumbar spinal needle capable of preventing liquid leakage. The lumbar spinal needle comprises a needle tube and a needle core, wherein a notch connected with a piezometer tube or a collecting tube is formed in a needle tail part of the needle tube; a ''T''-shaped pore passage is formed in the needle tail part, comprises a main pore passage penetrated by the needle core and a branched pore passage communicating with the notch and is divided into a main pore passage front-side part, a main pore passage tail-side part and the branched pore passage by taking a junction of the main pore passage and the branched pore passage as a border; the pore diameter of the main pore passage tail-side part is larger than the outer diameter of the needle core, a one-way valve assembling slot is formed in the main pore passage tail-side part, and a silica gel one-way valve is fixedly mounted in the one-way valve assembling slot; and a switch type one-way valve is mounted in thebranched pore passage. According to the lumbar spinal needle, an opening in the tail of the needle tube can be relatively advantageously closed in a paracentesis operation process, and the loss of cerebrospinal fluid in a lumbar spinal paracentesis process can be effectively controlled.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a liquid-leakage-proof lumbar puncture needle. Background technique [0002] Lumbar puncture is a relatively common operation technique in clinical practice. Its purpose is to collect a certain amount of cerebrospinal fluid samples, and to clearly diagnose infection, tumor and craniocerebral fluid by detecting the number, shape, content of various substances and cerebrospinal fluid pressure of cerebrospinal fluid. brain disease. The main contraindication to lumbar puncture is intracranial hypertension, which can lead to brain herniation if the intracranial pressure is too high. This is one of the clinical emergencies, and improper treatment will lead to the compression of the vital center and the death of the patient. [0003] Such as figure 1 As shown, the surgical instrument currently used for lumbar puncture is a lumbar puncture needle, including a needle tube and a...

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Problems solved by technology

[0004] The existing surgical instruments have the following problems: firstly, after the puncture is successful, the needle core is pulled out, and then the pressure measuring tube is connected, which is easy to waste cerebrospinal fluid, which is cumbersome and increases the risk of infection; secondly, after the cerebrospinal fluid pressure measurement is completed, the pressure measuring tube is pulled out, It is easy to waste cerebrospinal fluid again; finally, even if the pressure measuring tube is pulled out and the needle core is inserted again immediately, after the collection tube is prepared, the needle core is pulled out and the cerebrospinal fluid is collected. Although this can reduce the loss of cerebrospinal fluid, the operation steps are cumbersome and require multiple The cooperation of medical staff increases the occupation of medical resources

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