Lumbar puncture needle capable of detecting oxygen partial pressure and biochemical indexes of cerebrospinal fluid

Abstract

The invention belongs to the field of medical appliances, and in particular relates to a lumbar puncture needle capable of detecting oxygen partial pressure and biochemical indexes of cerebrospinal fluid. The lumbar puncture needle comprises a needle head 1, a needle tube 2, a pushing component 3 and a guide wire 4, wherein the needle head 1 has a hollow cavity, scales 101 are arranged on the needle head 1, the pushing component 3 comprises a push rod 301 and a piston 302, the piston 302 is arranged in the needle tube 2, the needle head 1 is connected with the front end of the needle tube 2, and a movable cap 202 is arranged at the front end of the needle tube 2. The lumbar puncture needle disclosed by the invention can collect the cerebrospinal fluid under the condition that air is isolated, the operation is simple and convenient, the use is safe, the purpose of accurately measuring the oxygen partial pressure and biochemical indexes can be achieved, and meanwhile, the medicine injecting function is also available.

Description

technical field [0001] The invention belongs to the field of medical appliances, in particular to a lumbar puncture needle capable of measuring the oxygen partial pressure of cerebrospinal fluid and biochemical indexes. Background technique [0002] Lumbar puncture is one of the commonly used operations in neurology. It is mainly used for extracting cerebrospinal fluid to measure pressure, injecting drugs into the subarachnoid space, cerebrospinal fluid angiography, and taking cerebrospinal fluid samples. In the lateral position, the intervertebral space was punctured from L2 to S1 (mainly L3-4). After local routine disinfection and anesthesia, wearing rubber gloves, the puncture needle is inserted slowly along the direction of the spinous process and perpendicular to the back plane. When the needle tip touches the bone during the needle insertion process, the needle should be retracted to the subcutaneous point to correct the angle before puncture . When the needle is ins...

AI Technical Summary

Problems solved by technology

However, there are many defects in the structural design of the currently used cerebrospinal fluid sampling device or liquid collector: 1. The cerebrospinal fluid is exposed to the environment for a long time and is easily polluted by foreign substances; At the same time, the atmospheric pressure will press the oxygen and carbon dioxide in the air into the cerebrospinal fluid, making the measurement of the partial pressure of oxygen in the cerebrospinal fluid inaccurate, leading to wrong diagnostic results for doctors, and thus affecting subsequent treatment

This device does not solve the following defects of traditional puncture needles: ① It is inconvenient to grasp the depth of insertion, and doctors usually collect cerebrospinal fluid based on experience; ② There is no air isolation device, and a large amount of air components such as oxygen and carbon dioxide will be mixed to a large extent. There are large errors in the measured oxygen partial pressure and other biochemical indicators; ③The pressure measuring device is in direct contact with the cerebrospinal fluid, and repeated use will cause pollution and inaccurate measurement results

[0006] The utility model patent "New Lumbar Puncture Needle" (Patent No. CN201220508634.4) can be used to measure the pressure of cerebrospinal fluid. The device includes a puncture needle tube and a needle seat at the rear end of the puncture needle tube. Depth; this device does not solve the following defects of traditional puncture needles: ①Lack of visual visibility to observe whether the cerebrospinal fluid flows out; ②There is no air isolation device, and a large amount of air components such as oxygen and carbon dioxide will be mixed to a large extent, making There are large errors in the measured partial pressure of oxygen and other biochemical indicators; ③The pressure measuring device is in direct contact with the cerebrospinal fluid, and repeated use will cause pollution and inaccurate measurement results; Functions that can be used for changing fluids or injecting drugs

[0007] However, there is currently no lumbar puncture needle dedicated to collecting cerebrospinal fluid on the market to keep the collected cerebrospinal fluid in its initial state, so as to ensure the accuracy of the measurement results of various physiological and biochemical indicators, which is difficult to meet the needs of medical diagnosis and treatment and the market. Therefore, there is an urgent need for a lumbar puncture needle. A new device to meet the above requirements

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