CN114983378A - Automatic cerebrospinal fluid pressure measuring system in lumbar puncture - Google Patents
Automatic cerebrospinal fluid pressure measuring system in lumbar puncture Download PDFInfo
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- CN114983378A CN114983378A CN202210301505.6A CN202210301505A CN114983378A CN 114983378 A CN114983378 A CN 114983378A CN 202210301505 A CN202210301505 A CN 202210301505A CN 114983378 A CN114983378 A CN 114983378A
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- pressure
- processing module
- data processing
- accommodating cavity
- intelligent controller
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/03—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs
- A61B5/032—Spinal fluid pressure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3401—Puncturing needles for the peridural or subarachnoid space or the plexus, e.g. for anaesthesia
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/03—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs
- A61B5/036—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs by means introduced into body tracts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6848—Needles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/742—Details of notification to user or communication with user or patient ; user input means using visual displays
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00017—Electrical control of surgical instruments
- A61B2017/00022—Sensing or detecting at the treatment site
Abstract
The invention discloses an automatic cerebrospinal fluid pressure measuring system in a lumbar puncture operation, which comprises: the lumbar puncture needle, the pressure sensing channel, the data processing module and the intelligent controller are arranged on the lumbar puncture needle; an accommodating cavity is formed in the lumbar puncture needle, a pressure sensing channel is communicated with the accommodating cavity, a sensor is arranged on the inner wall of the pressure sensing channel and connected with a data processing module, and the data processing module is electrically connected with an intelligent controller; the intelligent controller is electrically connected with the data processing module and used for receiving and analyzing the pressure data measured by the data processing module in real time and displaying a specific pressure value. The intelligent pressure measurement device realizes pressure measurement of collected cerebrospinal fluid entering the accommodating cavity in the puncture needle, and real-time pressure data collection and display are carried out through the intelligent controller, so that great convenience is provided for doctors, and the problems that manual reading errors are large and waste of cerebrospinal fluid of patients is easy to occur in the prior art are effectively solved.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an automatic cerebrospinal fluid pressure measuring system in a lumbar puncture operation.
Background
Lumbar puncture is a commonly used diagnosis and treatment operation in clinical medicine, especially neurology. The specific operation method is that the patient takes the left lateral decubitus position, bends the neck and holds the knee, and makes the spine anteflexion and the intervertebral space open as much as possible. The puncture site is generally selected to insert the needle in the 4 th and 5 th lumbar vertebra gaps, if failure occurs, the 3 rd and 4 th lumbar vertebra gaps or the 5 th lumbar vertebra and sacrum gaps can be selected to be inserted in sequence: skin, subcutaneous tissue, supraspinal ligamentInterspinous ligament, ligamentum flavum, epidural space, dura mater, arachnoid, and finally subarachnoid space. Cerebrospinal fluid in the subarachnoid space flows out of the hollow needle hole of the lumbar puncture needle, is connected with a transparent glass pressure tube, and is read according to the height of the liquid level in the glass tube, wherein the pressure unit is mmH 2 O。
Pressure measurement by the height of the liquid level in the glass tube has several disadvantages:
(1) the pressure measurement time is too long. The cerebrospinal fluid slowly rises in the glass tube, and the whole process generally lasts for about ten seconds and several seconds, so that the time of exposing sterile body fluid in the air is increased, the probability of contamination of the body fluid by pathogens is increased, and the accuracy of the follow-up cerebrospinal fluid sample needing bacteriological and mycological examination is greatly influenced, because bacteria and fungi are ubiquitous in the air and daily life, and the cerebrospinal fluid in the subarachnoid cavity is sterile.
(2) The readings are not accurate enough. Since the fluid level varies greatly with the patient's position, the physician will typically order the patient to remain stationary and read the lowest level of the fluid as the pressure value after the fluid level is no longer changing, but the piezometer will have a scale of 10mm h2O, which will vary greatly due to variations in the patient's position, the operating physician's gaze height, and the estimate of the fluid level height.
(3) Waste of cerebrospinal fluid sample. The cerebrospinal fluid flows into the glass tube for pressure measurement, about 5ml of liquid in the glass tube cannot be used for sample detection, the volume of the whole cerebrospinal fluid of a human body is only 110-200ml, which is equivalent to 5-10% of the cerebrospinal fluid in the human body, so that the cerebrospinal fluid is discarded after detection, and about 8ml of sample is additionally taken for subsequent detection of conventional cerebrospinal fluid, biochemistry, bacterial culture and the like.
(4) Increase the incidence of headache, a complication after operation. Headache is the most common complication after lumbar puncture, and the headache is caused by the fact that the cerebrospinal fluid loss causes the reduction of intracranial pressure and stimulates meninges. The current treatment mode for the headache complications is to lie on a flat bed with no pillow, and to drink more water or to drip physiological saline intravenously. Reducing the waste of cerebrospinal fluid samples can reduce the probability of headache complications if the manometry mode can be improved.
(5) Increasing the incidence of post-operative complications, infections. The complication of infection is less common compared with headache, but the longer the cerebrospinal fluid is exposed outside, the longer the cerebrospinal fluid is contacted with bacteria in the outside air, if the pressure measurement can be read electronically in time, the whole pressure measurement process can be greatly shortened, and the exposure time of sterile cerebrospinal fluid in the outside bacteria environment is reduced.
Therefore, how to provide an automatic cerebrospinal fluid pressure measuring system in the lumbar puncture operation is a problem which needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides an automatic cerebrospinal fluid pressure measuring system in a lumbar puncture, which can effectively solve the problems that in the prior art, the error is large and cerebrospinal fluid of a patient is easily wasted due to the fact that a method of manually reading cerebrospinal fluid pressure is needed when the lumbar puncture is performed.
In order to achieve the purpose, the invention adopts the following technical scheme:
an automatic pressure measurement system of cerebrospinal fluid in lumbar puncture includes: the lumbar puncture needle, the pressure sensing channel, the data processing module and the intelligent controller are arranged on the lumbar puncture needle;
the lumbar puncture needle is internally provided with an accommodating cavity, a pressure sensing channel is communicated with the accommodating cavity, a sensor is arranged on the inner wall of the pressure sensing channel and connected with a data processing module, the data processing module is electrically connected with the intelligent controller, the sensor is used for acquiring an electric signal corresponding to the pressure of cerebrospinal fluid flowing into the pressure sensing channel in real time, and the data processing module converts the electric signal acquired by the sensor into pressure data and then transmits the pressure data to the intelligent controller;
the intelligent controller is electrically connected with the data processing module and used for receiving and analyzing the pressure data measured by the data processing module in real time and displaying a specific pressure value.
Preferably, the puncture needle also comprises a needle body and a puncture needle shell; the accommodating cavity, the pressure sensing channel and the data processing module are all arranged in the puncture needle shell;
the needle body penetrates through the puncture needle shell to be connected with the interior of the accommodating cavity, and cerebrospinal fluid enters the accommodating cavity through the needle body;
the accommodating cavity is also communicated with a first channel, and the first channel is communicated with the accommodating cavity and the pressure sensing channel.
Preferably, the sensor is a differential capacitance sensor, and the data processing module comprises a pulse modulation unit, a detection unit, a voltage amplification circuit and a filter circuit which are connected in sequence;
the pulse modulation unit converts a differential capacitance signal of the differential capacitance sensor into an oscillation signal and inputs the oscillation signal to the detection unit, the detection unit extracts a direct current component of the oscillation signal and inputs the oscillation signal to the voltage amplification circuit, the voltage amplification circuit extracts a voltage signal from the obtained direct current component and performs preliminary amplification, the voltage signal is input to the filter circuit after being subjected to adjustable gain amplification, and the filter circuit filters the amplified voltage signal and inputs the filtered voltage signal to the intelligent controller.
Preferably, the intelligent controller comprises an A/D conversion circuit, a pressure value conversion unit and a display unit;
the A/D conversion circuit is used for converting the voltage signal output by the data processing module into a corresponding digital signal, the pressure value conversion unit is used for collecting the digital signal converted by the A/D conversion circuit and converting the digital signal into a pressure signal, and the display unit is used for receiving and displaying the pressure signal value.
Preferably, the device also comprises a vacuum pump and a piston;
the vacuum pump is arranged on the lumbar puncture needle and is communicated with the accommodating cavity, and the piston is arranged in the accommodating cavity;
the vacuum pump is electrically connected with the intelligent controller, and the intelligent controller controls the work of the vacuum pump, so that the air pressure in the accommodating cavity is controlled.
Preferably, the accommodating cavity is further communicated with a second channel, and the second channel is used for communicating the accommodating cavity with the vacuum pump.
Preferably, the intelligent controller further comprises an interface unit and a parameter setting unit, the interface unit is used for receiving relevant control parameters of the vacuum pump, and the parameter setting unit is used for setting the vacuum pump according to the received relevant control parameters.
According to the technical scheme, compared with the prior art, the automatic cerebrospinal fluid pressure measuring system in the lumbar puncture is provided, the pressure sensor is arranged on the inner wall of the channel, pressure measurement is carried out on collected cerebrospinal fluid entering the containing cavity in the puncture needle, pressure data are collected in real time through the intelligent controller and displayed, great convenience is provided for a doctor, and the problems that manual reading errors are large and waste of cerebrospinal fluid of a patient is caused easily in the prior art are effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural view of an automatic spinal fluid pressure measuring system according to the present invention in a lumbar puncture;
FIG. 2 is a schematic diagram illustrating an automatic spinal fluid pressure measuring system for use in a lumbar puncture procedure according to the present invention;
wherein, the lumbar puncture needle comprises 1-lumbar puncture needle, 2-pressure sensing channel, 3-intelligent controller, 4-needle body, 5-puncture needle shell, 6-first channel, 7-vacuum pump and 8-second channel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses an automatic cerebrospinal fluid pressure measuring system in a lumbar puncture, which comprises the following components as shown in figure 1: the lumbar puncture needle comprises a lumbar puncture needle 1, a pressure sensing channel 2, a data processing module and an intelligent controller 3;
the lumbar puncture needle is characterized in that an accommodating cavity is formed in the lumbar puncture needle 1, a pressure sensing channel 2 is communicated with the accommodating cavity, a sensor is arranged on the inner wall of the pressure sensing channel 2 and connected with a data processing module, the data processing module is electrically connected with the intelligent controller 3, the sensor is used for acquiring an electric signal corresponding to the pressure of cerebrospinal fluid flowing into the pressure sensing channel 2 in real time, and the data processing module converts the electric signal acquired by the sensor into pressure data and then transmits the pressure data to the intelligent controller 3;
the intelligent controller 3 is electrically connected with the data processing module and is used for receiving and analyzing the pressure data measured by the data processing module in real time and displaying a specific pressure value.
In order to further implement the technical proposal, the puncture needle also comprises a needle body 4 and a puncture needle shell 5; the accommodating cavity, the pressure sensing channel 2 and the data processing module are all arranged in the puncture needle shell 5;
the needle body 4 penetrates through the puncture needle shell 5 to be connected with the interior of the accommodating cavity, and cerebrospinal fluid enters the accommodating cavity through the needle body 4;
the accommodating cavity is also communicated with a first channel 6, and the first channel 6 is communicated with the accommodating cavity and the pressure sensing channel 2.
In order to further implement the technical scheme, the sensor is a differential capacitance sensor, and the data processing module comprises a pulse modulation unit, a detection unit, a voltage amplification circuit and a filter circuit which are sequentially connected;
the pulse modulation unit converts a differential capacitance signal of the differential capacitance sensor into an oscillation signal and inputs the oscillation signal to the detection unit, the detection unit extracts a direct current component of the oscillation signal and inputs the direct current component to the voltage amplification circuit, the voltage amplification circuit extracts a voltage signal from the obtained direct current component and performs preliminary amplification, the voltage signal is input to the filter circuit after being subjected to adjustable gain amplification, and the filter circuit filters the amplified voltage signal and inputs the filtered voltage signal to the intelligent controller 3.
In order to further implement the above technical solution, the intelligent controller 3 includes an a/D conversion circuit, a pressure value conversion unit, and a display unit;
the A/D conversion circuit is used for converting the voltage signal output by the data processing module into a corresponding digital signal, the pressure value conversion unit is used for collecting the digital signal converted by the A/D conversion circuit and converting the digital signal into a pressure signal, and the display unit is used for receiving and displaying the pressure signal value.
In order to further implement the technical scheme, the device also comprises a vacuum pump 7 and a piston;
the vacuum pump 7 is arranged on the lumbar puncture needle 1 and is communicated with the accommodating cavity, and the piston is arranged in the accommodating cavity;
the vacuum pump 7 is electrically connected with the intelligent controller 3, and the intelligent controller 3 controls the work of the vacuum pump 7 so as to control the air pressure in the accommodating cavity.
In order to further implement the technical scheme, the accommodating cavity is also provided with a second channel 8 in a communication mode, and the second channel 8 is used for realizing the communication between the accommodating cavity and the vacuum pump 7.
In order to further implement the above technical solution, the intelligent controller 3 further includes an interface unit and a parameter setting unit, the interface unit is configured to receive the related control parameters of the vacuum pump 7, and the parameter setting unit is configured to set the vacuum pump 7 according to the received related control parameters.
It should be noted that:
the functions of the pressure value conversion unit and the parameter setting unit can be realized by a single chip microcomputer.
As shown in fig. 2, in the use process, the lumbar puncture needle 1 is inserted into the lumbar intervertebral space between the 4 th and the 5 th, thereby the removal of the control piston of the vacuum pump 7 is controlled through the intelligent controller 3, the cerebrospinal fluid is collected, the cerebrospinal fluid enters the pressure sensing channel 2 through the first channel 6, thereby the pressure of the cerebrospinal fluid is collected in real time, and the specific numerical value is displayed on the intelligent controller 3.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides an automatic pressure measurement system of cerebrospinal fluid in lumbar puncture art which characterized in that includes: the lumbar puncture needle, the pressure sensing channel, the data processing module and the intelligent controller are arranged on the lumbar puncture needle;
an accommodating cavity is formed in the lumbar puncture needle, a pressure sensing channel is communicated with the accommodating cavity, a sensor is arranged on the inner wall of the pressure sensing channel and connected with the data processing module, the data processing module is electrically connected with the intelligent controller, the sensor is used for acquiring an electric signal corresponding to the pressure of cerebrospinal fluid flowing into the pressure sensing channel in real time, and the data processing module converts the electric signal acquired by the sensor into pressure data and then transmits the pressure data to the intelligent controller;
the intelligent controller is electrically connected with the data processing module and used for receiving and analyzing the pressure data measured by the data processing module in real time and displaying a specific pressure value.
2. The automatic spinal fluid pressure measuring system for lumbar puncture as recited in claim 1, further comprising a needle body and a puncture needle housing; the accommodating cavity, the pressure sensing channel and the data processing module are all arranged in the puncture needle shell;
the needle body penetrates through the puncture needle shell to be connected with the inside of the accommodating cavity, and cerebrospinal fluid enters the accommodating cavity through the needle body;
the accommodating cavity is also communicated with a first channel, and the first channel is communicated with the accommodating cavity and the pressure sensing channel.
3. The automatic spinal fluid pressure measuring system for lumbar puncture surgery according to claim 1, wherein the sensor is a differential capacitance sensor, and the data processing module comprises a pulse modulation unit, a detection unit, a voltage amplification circuit and a filter circuit which are connected in sequence;
the pulse modulation unit converts a differential capacitance signal of the differential capacitance sensor into an oscillation signal and inputs the oscillation signal to the detection unit, the detection unit extracts a direct current component of the oscillation signal and inputs the oscillation signal to the voltage amplification circuit, the voltage amplification circuit extracts a voltage signal from the obtained direct current component, performs preliminary amplification on the voltage signal, performs adjustable gain amplification on the voltage signal and inputs the voltage signal to the filter circuit, and the filter circuit filters the amplified voltage signal and inputs the filtered voltage signal to the intelligent controller.
4. The automatic spinal fluid pressure measuring system for lumbar puncture as recited in claim 1, wherein said intelligent controller comprises an a/D conversion circuit, a pressure value conversion unit and a display unit;
the A/D conversion circuit is used for converting the voltage signal output by the data processing module into a corresponding digital signal, the pressure value conversion unit is used for collecting the digital signal converted by the A/D conversion circuit and converting the digital signal into a pressure signal, and the display unit is used for receiving and displaying the pressure signal value.
5. The automatic spinal fluid pressure measuring system according to claim 1, further comprising a vacuum pump and a piston;
the vacuum pump is arranged on the lumbar puncture needle and is communicated with the inside of the accommodating cavity, and the piston is arranged in the accommodating cavity;
the vacuum pump is electrically connected with the intelligent controller, and the intelligent controller controls the work of the vacuum pump so as to control the air pressure in the accommodating cavity.
6. The system according to claim 5, wherein a second channel is further provided in the receiving chamber, and the second channel is used for communicating the receiving chamber with the vacuum pump.
7. The automatic spinal fluid pressure measuring system according to claim 5, wherein the intelligent controller further comprises an interface unit and a parameter setting unit, the interface unit is used for receiving relevant control parameters of a vacuum pump, and the parameter setting unit is used for setting the vacuum pump according to the received relevant control parameters.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210301505.6A CN114983378A (en) | 2022-03-24 | 2022-03-24 | Automatic cerebrospinal fluid pressure measuring system in lumbar puncture |
| ZA2023/01477A ZA202301477B (en) | 2022-03-24 | 2023-02-06 | Automatic pressure measuring system for cerebrospinal fluid in lumbar puncture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210301505.6A CN114983378A (en) | 2022-03-24 | 2022-03-24 | Automatic cerebrospinal fluid pressure measuring system in lumbar puncture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114983378A true CN114983378A (en) | 2022-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210301505.6A Pending CN114983378A (en) | 2022-03-24 | 2022-03-24 | Automatic cerebrospinal fluid pressure measuring system in lumbar puncture |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114983378A (en) |
| ZA (1) | ZA202301477B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115956893A (en) * | 2023-02-10 | 2023-04-14 | 迈德微创(天津)医疗器械有限责任公司 | Device and method for measuring cerebrospinal fluid pressure after lumbar puncture |
-
2022
- 2022-03-24 CN CN202210301505.6A patent/CN114983378A/en active Pending
-
2023
- 2023-02-06 ZA ZA2023/01477A patent/ZA202301477B/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115956893A (en) * | 2023-02-10 | 2023-04-14 | 迈德微创(天津)医疗器械有限责任公司 | Device and method for measuring cerebrospinal fluid pressure after lumbar puncture |
| CN115956893B (en) * | 2023-02-10 | 2023-09-12 | 迈德微创(天津)医疗器械有限责任公司 | Lumbar puncture postcerebrospinal fluid pressure measuring device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA202301477B (en) | 2023-03-29 |
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