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Lumbar puncture needle with puncture depth feedback and real-time cerebrospinal fluid pressure monitoring functions

A puncture depth and pressure monitoring technology, applied in the field of lumbar puncture needles, can solve the problems of secondary brain herniation and rough measurement accuracy

Pending Publication Date: 2022-02-22
迈德微创(天津)医疗器械有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the success of lumbar puncture mainly depends on the doctor's operating experience. In addition, in the process of measuring the pressure of cerebrospinal fluid, the loss of cerebrospinal fluid is often too much, which not only easily leads to headache after puncture, but also may cause brain herniation in severe cases. Serious complication and often rough measurement precision

Method used

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  • Lumbar puncture needle with puncture depth feedback and real-time cerebrospinal fluid pressure monitoring functions
  • Lumbar puncture needle with puncture depth feedback and real-time cerebrospinal fluid pressure monitoring functions
  • Lumbar puncture needle with puncture depth feedback and real-time cerebrospinal fluid pressure monitoring functions

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Experimental program
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Effect test

Embodiment approach 1

[0035] as attached figure 2 Shown is the implementation process of the impedance measurement module of the present invention: the impedance measurement circuit (8) applies an excitation signal to the tissue under test through the first electrode (9) and the second electrode (10), and the excitation signal is a DC pulse signal or an AC signal , the impedance measurement circuit (8) receives the feedback signal, calculates the impedance value of the measured tissue, and the processor one (7) reads the impedance value from the impedance measurement circuit (8), and sends different acousto-optic signals according to the change of the impedance, when the impedance When the value reaches the threshold value, the warning light (5) and the buzzer (6) send out an alarm signal.

Embodiment approach 2

[0037] as attached image 3 Shown is the implementation process of the hydraulic measurement module of the present invention: the pressure sensor (1) contacts the cerebrospinal fluid through the pressure sensing channel, the pressure sensor (1) converts the pressure into a voltage signal, and the signal conditioning circuit (2) amplifies and filters the voltage signal , so that the voltage signal is stable, pure, and moderate in size, the processor two (3) collects the adjusted voltage signal, and calculates the corresponding pressure, and the display (4) receives and displays the pressure value output by the processor two (3).

Embodiment approach 3

[0039] as attached figure 1 , 2, 4-7 show the implementation process of the puncture depth feedback during the lumbar puncture process of the present invention: the operator holds the needle body (23) to perform puncture according to the conventional puncture point (generally the space between lumbar vertebrae 4 and 5) of the lumbar puncture After the puncture needle enters the human body, it punctures toward the lumbar subarachnoid space (32) through muscles (36), ligaments (30) and other human tissues. (13) (first electrode) and the measured impedance value between the inner needle (14) (second electrode) changes continuously, and is prompted by warning light (5) and buzzer (6). After the needle breaks through the dura mater and enters the lumbar subarachnoid space (32), the needle hole (34) of the puncture needle touches the cerebrospinal fluid, and the impedance value measured between the outer needle (13) and the inner needle (14) reaches the set value. threshold, the al...

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Abstract

The invention discloses a lumbar puncture needle capable of achieving puncture depth feedback and real-time cerebrospinal fluid pressure monitoring. The lumbar puncture needle comprises a measuring system and a puncture needle body. According to the measuring system, a method for detecting cerebrospinal fluid based on impedance and liquid pressure is designed; and the puncture needle main body comprises a puncture needle and a needle body, the puncture needle comprises an outer needle and an inner needle, an insulating coating is arranged in the outer needle, and the outer needle and the inner needle form a closed circuit with the measuring system through an electric lead. The lumbar puncture needle has the advantages that an alarm prompt can be given out when the puncture needle head makes contact with the lumbar vertebra subarachnoid space cerebrospinal fluid, the pressure of the cerebrospinal fluid can be monitored in real time in the cerebrospinal fluid reserving process, and the success rate and safety of the lumbar puncture operation can be improved.

Description

technical field [0001] The invention relates to a novel lumbar puncture needle, in particular to a lumbar puncture needle capable of feedbacking puncture depth and real-time monitoring of cerebrospinal fluid pressure, belonging to the field of medical devices. Background technique [0002] Lumbar puncture is a routine operation in clinical diagnosis and treatment. It is mainly used to collect cerebrospinal fluid for laboratory examination, measure cerebrospinal fluid pressure, analyze cerebrospinal fluid dynamics, and intrathecal injection. At present, whether the puncture needle enters the lumbar subarachnoid space during lumbar puncture, and The measurement of cerebrospinal fluid pressure during lumbar puncture mainly depends on the clinician's experience, as well as the millimeter tube or cerebrospinal fluid drip rate. [0003] At present, the success of lumbar puncture mainly depends on the doctor's operating experience. In addition, in the process of measuring the press...

Claims

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Application Information

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IPC IPC(8): A61B17/34A61B5/00A61B5/03A61B5/0537A61B10/00
CPCA61B17/3403A61B5/053A61B5/746A61B5/032A61B10/0045A61B2010/0077A61B17/3401
Inventor 马维宁王逸仙殷亚东殷清林
Owner 迈德微创(天津)医疗器械有限责任公司
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