A suction lumbar puncture needle

The invention provides a suction type lumbar puncture needle, comprising a needle core, a positioning body, a needle main body, a core lining seat, and an elongated wing. Container, chromogenic solution The container is divided into substrate chromogenic solution A, substrate chromogenic solution B and chromogenic solution C. The substrate chromogenic solution A is analytical agent, anticoagulant, surfactant A, substrate Color developing solution B is buffer, complexing agent, surfactant B, and color developing solution C is 3,3',5,5'tetramethylbenzidine and dimethyl sulfoxide. The main body of the needle, the three-way valve and the The rubber piston is combined into a closed space, avoiding the entry of outside air and bacteria, and improving the stability of the detection. The three main components are separated and the corresponding anticoagulant, complexing agent, surfactant, etc. are added to make the reagent The composition is stable and can be placed for a long time. When using, three color developing solutions are added successively through the three-way valve, which improves the accuracy and sensitivity of the detection.

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