CN112754451A - Portable noninvasive rapid intracranial pressure detection device after bone flap removal decompression, detection model and detection method - Google Patents
Portable noninvasive rapid intracranial pressure detection device after bone flap removal decompression, detection model and detection method Download PDFInfo
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Abstract
The invention discloses a portable intracranial pressure noninvasive rapid detection device after a bonesetting decompression operation, a detection model and a detection method, belonging to the technical field of biomedical electrical monitoring equipment, wherein the device comprises a shell, a power supply unit and a detection unit; the power supply unit is arranged in the shell and used for providing a power supply for the detection unit, and the detection unit is fixedly connected with the shell; the detection unit comprises a detection probe, a guide sliding rod, a pressing sheet, an elastic die air bag, a pressure sensor detection probe and a signal processing module which are sequentially arranged along the axis direction; the portable intracranial pressure noninvasive rapid monitoring device after the bonesetting decompression has higher measurement precision, and the error between the measurement value and the actual value is within 5 percent.
Description
Technical Field
The invention belongs to the technical field of biomedical electrical monitoring equipment, and particularly relates to a portable noninvasive rapid intracranial pressure detection device after a bone flap reduction operation, a detection model and a detection method.
Background
Intracranial pressure is one of important intracranial physiological indexes, and intracranial pressure monitoring in the neurosurgical perioperative period has very important significance for disease condition evaluation, treatment decision making and prognosis judgment. The current gold standard for intracranial pressure monitoring is invasive intracranial pressure monitoring, and invasive technology realizes direct measurement of pressure by implanting a pressure probe into the brain, and has the problems of high price, intracranial hemorrhage, infection risk and the like although the pressure probe is accurate.
The noninvasive intracranial pressure technology is also rapidly developed in recent years, and mainly comprises: 1. flash visual evoked potential method; 2. tympanic membrane displacement; 3. measuring cerebral blood flow by transcranial Doppler ultrasound; 4. measuring the width of the retrobulbar optic nerve sheath by ultrasonic. Although these techniques are non-invasive, they measure intracranial pressure more than indirectly due to the inherent barrier of the skull to pressure measurement, and their accuracy remains to be further verified. Patients after clinical ascending bone flap removal decompression still need to continuously monitor intracranial pressure, and because the skull bone flap is removed, the accuracy of the noninvasive intracranial technology can be greatly improved. In fact, at present, doctors clinically judge the intracranial pressure by using scalp tension empirical mode in a hand-touched bone flap removing decompression area, but the intracranial pressure cannot be measured numerically due to strong subjectivity, and according to the principle, related technical reports can also report that the intracranial pressure after the bone flap removing decompression operation can be measured noninvasively by designing a related pressure measuring instrument, but the operation is complex, and the measuring result is not exact.
Therefore, there is a need to improve and innovate the measurement principle and technology, and develop a noninvasive intracranial pressure monitoring device for patients after the boneless flap reduction surgery, which has accurate value, simple operation and low cost.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a portable intracranial pressure noninvasive rapid detection device after a bonesetting valve decompression operation, a model based on the device and a detection method, wherein the device has high measurement sensitivity, strong anti-interference capability and convenient use.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the invention discloses a portable intracranial pressure noninvasive rapid detection device after a boneless flap reduction operation, which comprises a shell, a power supply unit and a detection unit, wherein the shell is provided with a power supply unit and a power supply unit; the power supply unit is arranged in the shell and used for providing a power supply for the detection unit, and the detection unit is fixedly connected with the shell;
the detection unit comprises a detection probe, a guide slide bar, a pressing sheet, an elastic die air bag and a pressure sensor which are sequentially arranged along the axis direction;
a probe built-in magnet is arranged in the detection probe, a slide bar built-in magnet is arranged in the guide slide bar, and the probe built-in magnet and the slide bar built-in magnet can be attracted by magnetic force; a pressure sensor and a displacement sensor are arranged in the elastic die air bag, rare gas is filled in the elastic die air bag, and the pressure sensor is connected with the elastic die air bag; the detection probe moves to drive the guide sliding rod to move and push the pressing sheet to move so that the elastic die air bag above the pressing sheet deforms, the displacement sensor can detect the deformation of the elastic die air bag, and the pressure sensor can detect the change of internal pressure caused by the deformation of the elastic die air bag; the pressure sensor can detect the stress intensity applied to the skin of the brain to be detected by the detection probe.
Preferably, the air-conditioning system also comprises a control circuit board arranged in the shell, wherein the control circuit board consists of a power conversion module, an MCU (micro control unit) main control module, a signal amplification module, a voltage comparison module, a direct current boosting module, a battery electric quantity monitoring module, a fault alarm module and an air bag air pressure monitoring circuit;
the power conversion module is connected with the MCU main control module, the key input circuit, the battery electric quantity monitoring circuit, the air bag air pressure monitoring circuit and the direct current boosting module through shielding wires for supplying power, the output end of the direct current boosting module is connected with the signal amplification module and the voltage comparison module for supplying power through shielding wires, and the MCU main control module is connected with the signal amplification module, the key input circuit, the battery monitoring circuit, the fault alarm module and the air bag air pressure monitoring circuit for communication through signal shielding wires.
Preferably, a guide shaft sleeve is arranged outside the guide slide rod, the guide shaft sleeve is fixed at one end of a guide shaft sleeve mounting seat, and the other end of the guide shaft sleeve mounting seat is connected with the pressure sensor mounting fixing seat; one end of the pressure sensor is connected with the elastic die air bag, the other end of the pressure sensor is fixedly connected with the pressure sensor mounting fixing seat, and the other end of the pressure sensor mounting fixing seat is connected with the shell.
Preferably, the pressure sensor detection probe and the signal processing module are connected with the elastic die air bag through an air bag fixing seat adapter.
Preferably, a locking screw for detaching and replacing the detection probe is arranged above the detection probe.
Preferably, the detection probe is made of a resin material, and the elastic die air bag is made of a soft silica gel elastic die material; the shape and the material of the pressing sheet and the detection probe are the same.
Preferably, the shell is also provided with a display screen, a battery charging port, a battery switch and an instrument working switch; the display screen can display the data collected by the pressure sensor detection probe and the signal processing module in real time.
The invention also discloses a detection method based on the portable intracranial pressure noninvasive rapid detection device after the bonesetting valve decompression, which comprises the following steps: the portable noninvasive rapid intracranial pressure detection device after the boneless flap reduction operation is held by hands, so that a detection probe slowly and vertically approaches to the skin of the boneless skull to be detected, after full contact, longitudinal compressive stress is slowly applied, the elastic die air bag is deformed, and if the applied stress and the displacement of the elastic die air bag meet set thresholds, a pressure value in the elastic die air bag is obtained and automatically calculated and converted into an intracranial pressure value;
repeating the above operations 3-5 times, and taking the average value as the measured intracranial pressure value.
The invention also discloses a craniocerebral pressure detection model based on the portable intracranial pressure non-invasive rapid detection device after the boneless removal decompression, which comprises a simulated craniocerebral which is contacted with a detection probe of the portable intracranial pressure non-invasive rapid detection device after the boneless removal decompression, compressed air is filled in the simulated craniocerebral, an air pipe is arranged at the bottom of the simulated craniocerebral, the air pipe is connected with an air pipe connecting tee joint, one branch of the air pipe connecting tee joint is connected with a manual compression air bag, the other branch is provided with a high-precision pressure gauge, and a branch pipeline connected with the manual compression air bag is also provided with a flow switch and a choke switch.
The invention also discloses a detection method based on the craniocerebral pressure detection model, which comprises the following steps:
starting a choke switch, manually extruding a pressurizing air bag to pressurize a simulated craniocerebral cavity, stopping pressurizing when the value of a high-precision pressure gauge is within the range of 2.0-5.8 kPa, and rotating a flow switch to enable the air pressure value in the simulated craniocerebral to reach an experimental value;
closing a flow-resisting switch, holding the portable intracranial pressure noninvasive rapid detection device after the bonesetting valve decompression operation by hand to enable a detection probe to slowly and vertically approach a simulated craniocerebral elastic epidermis to be detected, and slowly applying longitudinal compression stress after full contact to enable an elastic model air bag to deform;
if the applied stress and the displacement of the elastic model air bag meet the set threshold value, acquiring a pressure value in the elastic model air bag and automatically calculating and converting the pressure value into an intracranial pressure value;
repeating the above operations 3-5 times, and taking the average value as the measured intracranial pressure value.
Compared with the prior art, the invention has the following beneficial effects:
the invention is based on the theory of elastomechanics and dynamic thermodynamics, changes the stress and displacement of an elastic model air bag which is arranged in a measuring device and has the attribute height close to the attribute height of the human skull epidermal brain material in real time and skillfully converts the intracranial pressure value into the pressure change in a detection air bag through conversion, thereby realizing the automatic and accurate quantification of instruments of an empirical method for judging the intracranial pressure by a clinician by using the scalp tension of a hand-touch bone flap-removing decompression operation area. The rapid detection device has the advantages of rapid, real-time, simple and portable measurement, low cost, high measurement accuracy and no influence of individual factor difference of a subject, overcomes the defect that the traditional invasive measurement method needs to implant the electrode in the cranial cerebral cavity, and solves the problems of complex measurement process, indirect measurement and poor measurement accuracy of the existing noninvasive technology. Therefore, the invention has wide application prospect in the aspect of measuring the intracranial pressure of a patient after the clinical bone flap removing decompression operation.
Drawings
FIG. 1 is a front view of a portable intracranial pressure noninvasive rapid monitoring device after a decompression technique for removing a bone flap
FIG. 2 is a rear view of the structure of a portable intracranial pressure noninvasive rapid monitoring device after a boneless reduction surgery;
FIG. 3 is a simulated human craniocerebral model detection system based on a portable postoperative intracranial pressure noninvasive rapid monitoring device for decompression after boneless flap removal;
in FIGS. 1 to 3: 1. a battery switch; 2. a battery charging interface; 3. an instrument operating switch; 4. a display screen; 5. a control circuit board; 6. a power supply battery pack; 7. a housing; 8. the pressure sensor is provided with a fixed seat; 9. a pressure sensor; 10. a pressure sensor; 11. the air bag is provided with a fixed base; 12. an air bag elastic film; 13. an instrument housing back cover plate; 14. a displacement sensor; 15. tabletting; 16. a guide shaft sleeve; 17. a guide shaft sleeve mounting seat; 18. locking the screw; 19. a magnet is arranged in the instrument measuring slide bar; 20. a magnet is arranged in the probe; 21. detecting a probe; 22. compressing air; 23. simulating a craniocerebral model; 24. a manual pressurizing air bag; 25. a flow switch; 26. a choke switch; 27. the air pipe is connected with the tee joint; 28. high precision pressure gauge.
FIG. 4 is a general block diagram of a control circuit of the portable intracranial pressure non-invasive rapid monitoring device after a decompression bonesetting operation;
FIG. 5 is a flow chart of the operation of the system of the portable intracranial pressure non-invasive rapid monitoring device after the decompression by removing the bone flap;
FIG. 6 is a block diagram (a) and a flow chart (b) of a battery power monitoring circuit of a portable intracranial pressure non-invasive rapid monitoring device after a boneless reduction surgery;
FIG. 7 is a block diagram (a) and a flowchart (b) of a key input circuit of a portable intracranial pressure non-invasive rapid monitoring device after a boneless reduction surgery;
FIG. 8 is a structural diagram (a) and a working flow chart (b) of a balloon pressure monitoring circuit of a portable intracranial pressure noninvasive rapid monitoring device after a boneless reduction surgery;
FIG. 9 is a structural diagram (a) and a work flow diagram (b) of a pressure value comparison circuit of a portable post-valvuloremoval decompression noninvasive rapid intracranial pressure monitoring device;
fig. 10 is a structural diagram (a) and a work flow chart (b) of an alarm circuit of a portable intracranial pressure noninvasive rapid monitoring device after a bone flap reduction operation.
In the figure: 1. a battery switch; 2. a battery charging interface; 3. an instrument operating switch; 4. a display screen; 5. a control circuit board; 6. a power supply battery pack; 7. a housing; 8. the pressure sensor is provided with a fixed seat; 9. a pressure sensor; 10. a pressure sensor; 11. the air bag is provided with a fixed base; 12. an air bag elastic film; 13. an instrument housing back cover plate; 14. a displacement sensor; 15. tabletting; 16. a guide shaft sleeve; 17. a guide shaft sleeve mounting seat; 18. locking the screw; 19. a magnet is arranged in the instrument measuring slide bar; 20. a magnet is arranged in the probe; 21. detecting a probe; 22. compressing air; 23. simulating a craniocerebral model; 24. a manual pressurizing air bag; 25. a flow switch; 26. a choke switch; 27. the air pipe is connected with the tee joint; 28. high precision pressure gauge.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 and 2, the portable noninvasive rapid intracranial pressure detection device after the bonesetting decompression, disclosed by the invention, can be held by hands at two sides of an instrument shell during use, and comprises a shell 7, a power supply unit and a detection unit;
the power supply unit is arranged in the shell 7 and used for providing power for the detection unit, and the detection unit is fixedly connected with the shell 7; the detection unit comprises a detection probe 21, a guide slide bar, a pressing sheet 15, an elastic die air bag 12 and a pressure sensor 9 which are sequentially arranged along the axis direction; a probe built-in magnet 20 is arranged in the detection probe 21, a slide bar built-in magnet 19 is arranged in the guide slide bar, and the probe built-in magnet 20 and the slide bar built-in magnet 19 can be attracted by magnetic force; a pressure sensor 10 and a displacement sensor 14 are arranged in the elastic die air bag 12, rare gas is filled in the elastic die air bag 12, and the pressure sensor 9 is connected with the elastic die air bag 12; the movement of the detection probe 21 drives the guide sliding rod to move, and pushes the pressing sheet 15 to move so that the elastic die air bag 12 above the pressing sheet 15 deforms, the displacement sensor 14 can detect the deformation of the elastic die air bag 12, and the pressure sensor 10 can detect the change of the internal pressure caused by the deformation of the elastic die air bag 12; the pressure sensor 9 can detect the stress intensity applied to the skin of the brain to be detected by the detection probe 21.
A guide shaft sleeve 16 is arranged outside the guide slide rod, the guide shaft sleeve 16 is fixed at one end of a guide shaft sleeve mounting seat 17, and the other end of the guide shaft sleeve mounting seat 17 is connected with a pressure sensor mounting fixed seat 8; one end of the pressure sensor 9 is connected with the elastic die air bag 12, the other end of the pressure sensor is fixedly connected with the pressure sensor mounting fixing seat 8, and the other end of the pressure sensor mounting fixing seat 8 is connected with the shell 7.
Further, the pressure sensor 9 is connected with the elastic die air bag 12 through an air bag fixing seat adapter 11.
And a locking screw 18 for detaching and replacing the detection probe is arranged above the detection probe 21.
The detection probe 21 is made of resin material, and the pressing sheet 15 and the detection probe 21 are the same in shape and material.
The elastic molded air bag 12 is made of soft silicone elastic mold material, so that the skin-imitated soft silicone elastic mold material is expected to be close to the material and the mechanical property of human skin to the maximum extent. The rare gas helium is used as a filling medium in the elastic model air bag 12, the helium has the characteristic of difficult gasification and can be approximately close to the property of an ideal gas model under normal temperature and normal pressure, so that the gas in the elastic model air bag 12 can meet the ideal gas state equation to ensure that the pressure change in the elastic model air bag 12 and the intracranial pressure are in a linear correlation relationship under the action of external stress, and the intracranial pressure value is skillfully converted into the pressure change in the elastic model air bag 12. Through the displacement sensor arranged in the elastic die air bag 12, the gas in the elastic die air bag 12 is prevented from leaking and the elastic die air bag 12 is prevented from suffering from abnormal stress, and if a set safety threshold value is reached, an alarm signal is triggered.
The shell 7 is also provided with a display screen 4, a battery charging port 2, a battery switch 1 and an instrument working switch 3; the display screen 4 can display the data collected by the pressure sensor 9 in real time.
Referring to fig. 4, which is a general block diagram of a control circuit of a portable intracranial pressure noninvasive rapid monitoring device after a bone flap reduction operation, a control circuit board 5 is installed in a housing 7, and the control circuit board 5 is composed of a power conversion module, an MCU main control module, a signal amplification module, a voltage comparison module, a dc boosting module, a battery power monitoring module, a fault alarm module and an air bag air pressure monitoring circuit;
the power conversion module is connected with the MCU main control module, the key input circuit, the battery electric quantity monitoring circuit, the air bag air pressure monitoring circuit and the direct current boosting module through shielding wires for supplying power, the output end of the direct current boosting module is connected with the signal amplification module and the voltage comparison module for supplying power through shielding wires, and the MCU main control module is connected with the signal amplification module, the key input circuit, the battery monitoring circuit, the fault alarm module and the air bag air pressure monitoring circuit for communication through signal shielding wires.
Specifically, the battery power monitoring circuit is shown in fig. 6, the key input circuit is shown in fig. 7, the airbag air pressure monitoring circuit is shown in fig. 8, the voltage comparison module is shown in fig. 9, and the fault alarm module is shown in fig. 10.
Preferably, the display screen adopts an ATK-0.96' OLED data display screen, the power supply conversion module adopts TP4056, and an STM32 singlechip is used for supporting the functions of the modules. The direct current boost module adopts XL6O09DC-DC boost module, the signal amplification module adopts constant-distance HYBS-017, and the voltage comparison module adopts a voltage comparison chip LM393 to realize functions.
Referring to fig. 5, the measurement feedback process is: firstly, the electric quantity feedback of a lithium battery is built in the instrument, and when the control circuit board detects that the electric quantity of the battery is lower than a threshold value, the measurement is finished and the charging is reminded; then, the pressure feedback in the elastic die air bag is arranged in the instrument, the control circuit board reads the pressure value of the elastic die air bag, and if the pressure value is lower than a threshold value, the measurement is finished and the instrument is reminded to be checked; the next step is handheld pressure feedback, the control circuit board reads the value of a built-in pressure sensor, if the value is not in the range specified by the instrument, the measurement is finished, and abnormal force application is reminded; then the control circuit board judges whether the pressure value of the built-in elastic die air bag is lower than a threshold value or not, if the pressure value is lower than the threshold value, the measurement is finished, and an inspection instrument is reminded; and then the control circuit board reads the pressure value in an elastic die air bag arranged in the instrument to judge whether the pressure value is in the intracranial pressure range of the patient, if not, the control circuit board reminds an operator to adjust the size and the direction of the hand-holding force to be in the measurement range specified by the instrument, and after the size and the direction of the hand-holding force are adjusted to be in the range specified by the instrument, the main controller reads the pressure value at the moment and displays the pressure value on a screen, and reminds the operator to finish the measurement.
The control flow is as follows: after the instrument is started, initializing all input and output ports, sending a communication instruction to a signal amplification module, a key input circuit and a display module to wake up the modules to start working, starting to acquire data after a control circuit board receives a signal which is sent by the modules and is in need of reaching, acquiring whether an instrument battery circuit signal and a built-in elastic mode air bag gas pressure intensity signal are abnormal, stopping measurement and reminding an inspection instrument if the signals are abnormal, if the signals are normal, continuously acquiring whether the magnitude of hand-held force is within a range specified by the instrument, if the signals are not reminding an operator to adjust the magnitude and the direction of applied force, if the pressure intensity and the displacement value of the built-in elastic mode air bag on an instrument display screen are observed within a normal range, meeting the condition, prompting that the instrument finishes measurement, and then automatically acquiring the pressure intensity value in the elastic mode air bag by the system and automatically calculating and converting, the measured intracranial pressure values displayed on the instrument screen are read.
When in detection: firstly, the scalp surface state of a patient with a bone flap is checked by naked eyes, the condition that no obvious wound, infection and the like exist is confirmed, then a battery switch and a program start/end switch are started, the battery electric quantity on a screen and the reading of a pressure sensor, a pressure intensity sensor and a displacement sensor are observed, and whether each sensor in an instrument is abnormal or not is judged. Then, the device is held by hands to enable the measuring probe of the instrument to slowly and vertically approach the skull skin of the boned valve, after the instrument is fully contacted, longitudinal compression stress is slowly applied, at the moment, the elastic die air bag in the instrument deforms, the main controller judges whether the magnitude of force is within 5-20N of the measuring range allowed by the accurate detection of the instrument, and if abnormal conditions such as overlarge force application or excessive lateral displacement occur, the instrument automatically alarms and prompts misoperation to protect the brain skin of a patient from being injured; and then, a display screen of the observation instrument displays whether the applied stress and the displacement of the elastic model air bag meet a system threshold value in real time, the instrument automatically prompts that the measurement is finished after the conditions are met, at the moment, the system can automatically acquire the pressure value in the elastic model air bag and automatically calculate and convert the pressure value into an intracranial pressure value, the measurement is repeated for 3-5 times, and the average value is taken as the final intracranial pressure value.
In addition, the invention also constructs a system which can simulate the human craniocerebral model, the structural schematic diagram is shown in figure 3, and the craniocerebral model consists of a manual pressurizing bag 24, a flow switch 25, a flow resisting switch 26, a trachea connecting tee 27, a high-precision pressure gauge 28 and the portable intracranial pressure non-invasive rapid monitoring device after the bone flap removing and pressure reducing operation. The pressure value in the elastic model air bag of the human craniocerebral model system is simulated by presetting to simulate the intracranial pressure range of 2.0-5.8 kPa after clinical bonesetting, and the pressure inside the air bag is measured by using a portable non-invasive rapid monitoring device for intracranial pressure after bonesetting and pressure reduction.
The measurement process is as follows:
the choke switch 26 is opened, the air pipe connecting tee 27 is communicated with the high-precision progress pressure 28, the pressurizing air bag 24 and the simulated brain 23, the pressurizing air bag 24 is squeezed by hands to pressurize a cavity of the simulated brain 23, when the value of the high-precision pressure gauge 28 is within the range of 2.0-5.8 kPa, pressurization is stopped, the flow switch 25 is rotated to enable the air pressure value in the simulated brain 23 to reach an experimental value, then the choke switch 26 is closed, the device is held by hands to enable the instrument measuring probe to slowly approach the air bag, then longitudinal compression stress is slowly applied, the direction of the applied stress is kept vertical to the plane of the skull skin of a patient as much as possible, the instrument display screen can display the applied stress value in real time, and the instrument can give an alarm to prompt misoperation if abnormal conditions such as excessive application force or excessive lateral displacement occur. The instrument display screen can display the applied stress and the displacement change of the air bag in real time, and after the applied stress and the displacement change of the air bag both reach the preset value of the system, the instrument can prompt that the measurement is finished and read the measured pressure value displayed on the screen of the device. The measurement results are shown in the table below, and it can be found that the pressure in the air bag is within the range of 2.0-5.8 KPa, the portable intracranial pressure noninvasive rapid monitoring device after the bonesetting and pressure reduction operation has higher measurement precision, and the error between the measurement value and the true value is within 5%.
The experimental effect of the portable intracranial pressure noninvasive rapid detection device after the bonesetting decompression is described by the following experiments:
example 1
Before clinical experiments are carried out, 20 groups of different air pressures are filled into a craniocerebral model to simulate the intracranial pressure of a patient, and the experimental data shown in the following table 1 are obtained by using the device and carrying out 20 times of measurement through the measurement method:
TABLE 1
2. 10 patients with the bone flap removing decompression operation in clinical recruitment, 7 males and 3 females, the age of 29-58 years, the weight of 46-88kg, and no history of systemic serious primary diseases such as cardiovascular and cerebrovascular diseases, lung diseases, kidney diseases, hemopoiesis and the like, firstly, a noninvasive rapid monitoring device for intracranial pressure after the bone flap removing decompression is used for detecting the intracranial pressure of the patients, and then, an invasive direct measurement method of implanting a pressure probe into the brain is used for detecting the intracranial pressure, and the measurement comparison results of the two measurement methods are shown in the following table 2.
TABLE 2
The clinical measurement data in table 2 further confirm the portable noninvasive rapid monitoring device pair disclosed by the invention
The intracranial pressure after the boneless valve decompression operation has higher detection precision, and the error of the measured value and the noninvasive current clinical measured gold standard of the intracranial pressure after the boneless valve decompression operation is within 5 percent.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. A portable intracranial pressure noninvasive rapid detection device after a bone flap reduction operation is characterized by comprising a shell (7), a power supply unit and a detection unit; the power supply unit is arranged in the shell (7) and used for providing power for the detection unit, and the detection unit is fixedly connected with the shell (7);
the detection unit comprises a detection probe (21), a guide sliding rod, a pressing sheet (15), an elastic die air bag (12) and a pressure sensor (9) which are sequentially arranged along the axis direction;
a probe built-in magnet (20) is arranged in the detection probe (21), a slide bar built-in magnet (19) is arranged in the guide slide bar, and the probe built-in magnet (20) and the slide bar built-in magnet (19) can be attracted by magnetic force; a pressure sensor (10) and a displacement sensor (14) are arranged in the elastic die air bag (12), rare gas is filled in the elastic die air bag (12), and the pressure sensor (9) is connected with the elastic die air bag (12); the detection probe (21) moves to drive the guide sliding rod to move, the pressing sheet (15) is pushed to move, so that the elastic die air bag (12) above the pressing sheet (15) deforms, the displacement sensor (14) can detect the deformation of the elastic die air bag (12), and the pressure sensor (10) can detect the change of internal pressure caused by the deformation of the elastic die air bag (12); the pressure sensor (9) can detect the stress intensity applied to the surface of the brain to be detected by the detection probe (21).
2. The portable noninvasive rapid intracranial pressure detection device after the osteotomy valve-removal decompression as recited in claim 1, further comprising a control circuit board (5) installed in the housing (7), wherein the control circuit board (5) is composed of a power conversion module, an MCU master control module, a signal amplification module, a voltage comparison module, a DC boosting module, a battery power monitoring module, a fault alarm module and an air bag air pressure monitoring circuit;
the power conversion module is connected with the MCU main control module, the key input circuit, the battery electric quantity monitoring circuit, the air bag air pressure monitoring circuit and the direct current boosting module through shielding wires for supplying power, the output end of the direct current boosting module is connected with the signal amplification module and the voltage comparison module for supplying power through shielding wires, and the MCU main control module is connected with the signal amplification module, the key input circuit, the battery monitoring circuit, the fault alarm module and the air bag air pressure monitoring circuit for communication through signal shielding wires.
3. The portable intracranial pressure noninvasive rapid detection device after the osteotomy valve-removal decompression as recited in claim 1, wherein a guide shaft sleeve (16) is arranged outside the guide slide bar, the guide shaft sleeve (16) is fixed at one end of a guide shaft sleeve mounting seat (17), and the other end of the guide shaft sleeve mounting seat (17) is connected with the pressure sensor mounting fixing seat (8); one end of the pressure sensor (9) is connected with the elastic die air bag (12), the other end of the pressure sensor is fixedly connected with the pressure sensor mounting fixing seat (8), and the other end of the pressure sensor mounting fixing seat (8) is connected with the shell (7).
4. The device for the noninvasive and rapid detection of intracranial pressure after portable boneless decompression as claimed in claim 1, wherein the pressure sensor (9) is connected with the elastic model balloon (12) through a balloon fixing seat adapter (11).
5. The device for the noninvasive and rapid detection of intracranial pressure after portable osteotomy valve-removal decompression as recited in claim 1, wherein a locking screw (18) for detaching and replacing the detection probe is arranged above the detection probe (21).
6. The device for the noninvasive and rapid detection of intracranial pressure after portable decompression after a bonesetting procedure according to claim 1, wherein the detection probe (21) is made of resin material, and the elastic mold balloon (12) is made of soft silica elastic mold material; the pressing sheet (15) and the detection probe (21) are the same in shape and material.
7. The portable intracranial pressure noninvasive rapid detection device after the osteotomy valve-removal decompression as claimed in claim 1, wherein the housing (7) is further provided with a display screen (4), a battery charging port (2), a battery switch (1) and an instrument working switch (3); the display screen (4) can display the data collected by the pressure sensor (9) in real time.
8. A detection method based on the portable intracranial pressure noninvasive rapid detection device after the decompression by bone flap as claimed in any one of claims 1 to 7, characterized by comprising the following operations: the portable intracranial pressure noninvasive rapid detection device after the boneless flap reduction operation is held by hands, a detection probe (21) is slowly and vertically close to the skin of the boneless skull to be detected, after full contact, longitudinal compressive stress is slowly applied, so that the elastic die air bag (12) deforms, and if the applied stress and the displacement of the elastic die air bag (12) meet set thresholds, a pressure value in the elastic die air bag (12) is obtained and automatically calculated and converted into an intracranial pressure value;
repeating the above operations 3-5 times, and taking the average value as the measured intracranial pressure value.
9. The craniocerebral pressure detection model is based on the portable post-osteotomy valve decompression intracranial pressure noninvasive rapid detection device as in any one of claims 1-7, and is characterized by comprising a simulation craniocerebral (23) contacted with a detection probe (21) of the portable post-osteotomy valve decompression intracranial pressure noninvasive rapid detection device, wherein compressed air (22) is filled in the simulation craniocerebral (23), an air pipe is arranged at the bottom of the simulation craniocerebral (23), the air pipe is connected with an air pipe connecting tee (27), one branch of the air pipe connecting tee (27) is connected with a manual pressurizing air bag (24), the other branch is provided with a high-precision pressure gauge (28), and a flow switch (25) and a flow resisting switch (26) are further arranged on a branch pipeline connecting the manual pressurizing air bag (24).
10. The method for detecting the craniocerebral pressure detection model according to claim 9, which comprises the following steps:
the choke switch (26) is opened, the pressurizing air bag (24) is manually squeezed to pressurize the cavity of the simulated cranium (23), when the value of the high-precision pressure gauge (28) is within the range of 2.0-5.8 kPa, pressurization is stopped, and the flow switch (25) is rotated to enable the air pressure value in the simulated cranium (23) to reach an experimental value;
closing a choke switch (26), holding the portable intracranial pressure noninvasive rapid detection device after the bonesetting valve decompression operation by hand to enable a detection probe (21) to slowly and vertically approach a simulated craniocerebral elastic epidermis to be detected, and slowly applying longitudinal compression stress after full contact to enable an elastic model air bag (12) to deform;
if the applied stress and the displacement of the elastic model air bag (12) meet the set threshold value, acquiring the pressure value in the elastic model air bag (12) and automatically calculating and converting the pressure value into an intracranial pressure value;
repeating the above operations 3-5 times, and taking the average value as the measured intracranial pressure value.
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