Integrated closed lumbar puncture pressure measuring and sampling system

Abstract

The invention discloses an integrated closed lumbar puncture pressure measuring and sampling system which comprises a puncture needle and a first drainage tube connected with the puncture needle, the end, opposite to the connecting end of the puncture needle, of the first drainage tube is connected with the inlet end of a four-way valve, the other three ports of the four-way valve are sequentially arranged to be a pressure measuring end used for being connected with a detachable pressure measuring device used for measuring the pressure of cerebrospinal fluid, a sewage discharging end used for discharging the cerebrospinal fluid with blood and a collecting end used for discharging the cerebrospinal fluid which is not polluted by the blood, the sewage discharging end is connected with a first collecting device for collecting and observing cerebrospinal fluid with blood, and the collecting end is connected with a sampling and collecting device for collecting cerebrospinal fluid samples, so that the integrated closed pressure measuring and sampling structure is formed through the puncture needle, the first drainage tube, the four-way valve, the first collecting device and the sampling and collecting device. According to the system, the accuracy of pressure measurement can be effectively improved, and sampling is ensured to improve the credibility and accuracy of a test result.

Description

Technical field [0001] The present invention belongs to the field of medical devices, and more particularly to a integrated closed lumbar puncture measurement pressure sample system. Background technique [0002] Lumbar puncture technology (abbreviation, waist), first via the intervertebral gap into the backpack, then the waist punching communication device is measured, and the dripping cerebral fluid is collected. Waist needle, measurement instrument, the collected test tube is separated from each other, the pressure and collecting cerebrospinal fluid is exposed to the air. [0003] Existing lumbar puncture facilities: (1) The existing waist is exposed to the air, and the sample is extremely easily contaminated by bacteria in the air, thus causing interference to test results, especially pathogenic test results. (2) The existing waist puncturing adopts the principle of connectors, that is, "L" tube of the upper and lower openings, the lower end is connected to the waist, the upp...

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Problems solved by technology

[0003] Defects in the existing lumbar puncture facilities: (1) The process of collecting cerebrospinal fluid through lumbar puncture is exposed to the air, and the samples are easily polluted by bacteria in the air, which will interfere with the test results, especially the pathogenic test results

(2) The existing lumbar puncture pressure measurement adopts the principle of a connector, that is, an "L"-shaped tube with upper and lower openings, the lower end is connected to the lumbar puncture needle, and the upper end is connected to the air, which will pollute the cerebrospinal fluid sample; The pressure in the spinal canal, and the length of the pressure measuring tube is limited. In clinical practice, it can only measure the pressure not higher than 330 mm water column. When the pressure of the cerebrospinal fluid exceeds 330 mm water column, it is impossible to measure the pressure accurately, especially when the intracranial pressure is severely increased. , connecting more extension tubes, with the increase of cerebrospinal fluid flowing out of the tube, the intracranial pressure will decrease rapidly, and the error between the measured value of cerebrospinal fluid pressure and the actual intracranial pressure will increase significantly

(3) The existing lumbar puncture process requires both pressure measurement and cerebrospinal fluid collection. There are many steps and relatively long time-consuming

(4) In the process of collecting cerebrospinal fluid, the flow rate of cerebrospinal fluid cannot be effectively controlled, which may easily lead to too fast outflow of cerebrospinal fluid and increase the probability of inducing cerebral herniation

(5) The existing cerebrospinal fluid collection container has no capacity label, and it is difficult to accurately measure the amount of cerebrospinal fluid collected, which may easily lead to insufficient collection of specimens or excessive release of cerebrospinal fluid

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