External ventricular drainage device capable of monitoring intracranial pressure in real time and use method of external ventricular drainage device

Abstract

The invention discloses an external ventricular drainage device for monitoring intracranial pressure in real time and a use method thereof. The device comprises a drainage module, a pressure measuring module, a pressure regulating module and a liquid collecting module, the drainage module is used for leading cerebrospinal fluid out of the ventricle; the pressure measuring module is communicated with the drainage module and is used for measuring the pressure of cerebrospinal fluid, converting a pressure signal into an electric signal and displaying an intracranial pressure value in real time; reference height registration is set between the pressure measuring module and the pressure regulating module, so that the detection plane of the pressure measuring module corresponds to the zero point of the graduated scale of the pressure regulating module; the pressure regulating module is communicated with the drainage module, and the flow of cerebrospinal fluid led out by the drainage module is controlled by regulating the height of the shunt bottle; the liquid collecting module is communicated with the drainage module and is used for collecting the led-out cerebrospinal fluid. According to the invention, the monitoring precision, the operation intuition and the clinical safety of bedside external ventricular drainage can be improved, and the portability and the clinical adaptability are considered at the same time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an external ventricular drainage device for real-time monitoring of intracranial pressure and a method of use thereof. BACKGROUND

[0002] Intracranial pressure abnormalities are common and life-threatening pathological processes in various cranial diseases such as cranial trauma, cerebral hemorrhage, hydrocephalus, and cerebrospinal fluid infection. In clinical practice, a ventricular catheter is often placed in the lateral ventricle of a patient and connected to a bedside drainage device to drain excess cerebrospinal fluid or bloody exudate, thereby reducing intracranial pressure, relieving pressure on the brain tissue, and gaining time for further diagnosis and treatment. Such devices typically consist of a catheter system, a shunt or drip bottle for gravity regulation, a liquid collection container, and a valve for injection or blockage if necessary.

[0003] In traditional technology, bedside shunt systems are usually mechanical drip bottles or shunt bottles. Medical personnel visually observe the liquid level and scale on the bottle and manually adjust the height of the shunt bottle to regulate the drainage flow. Continuous monitoring of intracranial pressure often relies on handheld or bedside monitoring instruments. There is no direct system registration between these monitoring devices and the shunt bottle. Medical personnel need to integrate the shunt bottle scale, disease assessment, and single-point pressure readings to determine the treatment effect and whether to adjust the drainage strategy. In some high-end devices, electronic pressure sensors and remote monitoring have been introduced, but these systems often have problems such as large size, high cost, complex installation and wiring, or lack of friendliness for rapid deployment at the bedside. SUMMARY

[0004] The present application aims to provide an external ventricular drainage device for real-time monitoring of intracranial pressure and a method of use thereof, which can improve the monitoring accuracy, operational intuitiveness, and clinical safety of bedside external ventricular drainage, while also considering portability and clinical adaptability.

[0005] Embodiments of the present application are implemented as follows:

[0006] An external ventricular drainage device for real-time monitoring of intracranial pressure comprises a drainage module, a pressure measurement module, a pressure regulation module, and a liquid collection module.

[0007] The drainage module drains cerebrospinal fluid from the ventricle.

[0008] The pressure measurement module communicates with the drainage module, measures cerebrospinal fluid pressure, converts the pressure signal to an electrical signal, and displays the intracranial pressure value in real time.

[0009] A reference height registration is provided between the pressure measurement module and the pressure regulation module, so that the detection plane of the pressure measurement module corresponds to the zero point of the scale of the pressure regulation module.

[0010] The pressure regulating module is in communication with the drainage module, and the flow of the cerebrospinal fluid drained by the drainage module is controlled by adjusting the height of the shunt bottle.

[0011] The liquid collecting module is in communication with the drainage module, and the cerebrospinal fluid drained is collected.

[0012] In a preferred embodiment of the present application, the external ventricular drainage device for real-time monitoring of intracranial pressure comprises a drainage module, a pressure measuring module, a pressure regulating module, a liquid collecting module, and a liquid path.

[0013] One end of the ventricular catheter is inserted into the ventricle, and the other end is connected to the pressure measuring module and the pressure regulating module through the connecting pipeline.

[0014] The drainage three-way valve is used for switching between drainage, closure and injection modes.

[0015] The technical effect is that the stable delivery of cerebrospinal fluid is ensured by the liquid path communication, and a continuous closed liquid column is provided for the pressure measuring module; the drainage three-way valve can quickly switch between drainage, closure and injection modes, facilitating flushing, sampling or emergency blocking in different operation scenarios, improving operation flexibility and reducing the risk of misoperation and complications. Bedside flushing is facilitated to unblock the blocked pipe, non-invasive sampling is facilitated, and disinfection or one-time replacement is facilitated, and the overall structure is simple and compatible.

[0016] In a preferred embodiment of the present application, the external ventricular drainage device for real-time monitoring of intracranial pressure comprises a drainage module, a pressure measuring module, a pressure regulating module, a liquid collecting module, and a liquid path.

[0017] The sensor three-way valve is used for controlling the connection between the drainage module, the pressure measuring module and the pressure regulating module.

[0018] The pressure sensor is in contact with the cerebrospinal fluid drained, measures the cerebrospinal fluid pressure, and transmits the pressure signal to the main control circuit board for processing to convert the pressure signal into an electrical signal.

[0019] The display screen is used for real-time display of pressure values and prompt information.

[0020] The input keys are used to sense the input instructions of the operator, and the input instructions include at least one of low-power management, reference height alignment zero adjustment, pressure detection and infrared lamp control.

[0021] The power supply unit is used for power supply.

[0022] The infrared ray lamp is used to assist in adjusting the pressure sensor to be flush with the external auditory canal of the patient, and to reduce the zero error.

[0023] Its technical advantages lie in the following: By incorporating a pressure sensor that directly contacts the cerebrospinal fluid, it can accurately detect the cerebrospinal fluid pressure in real time and convert it into an electrical signal, thereby achieving continuous monitoring of intracranial pressure. The module includes a main control circuit board, a display screen, and input buttons, integrating data acquisition, processing, and display. This allows medical staff to intuitively view real-time intracranial pressure values ​​and related prompts, making operation simple. With the assistance of an infrared lamp for positioning, the pressure measuring plane can be accurately aligned with the patient's external auditory canal, achieving zeroing at the reference height and effectively reducing zero-point error.

[0024] In a preferred embodiment of the present invention, in the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure, the pressure measuring module switches the flow path through the sensor three-way valve, and can selectively enable the pressure sensor to measure the cerebrospinal fluid pressure or the height pressure generated by the liquid level of the diversion bottle in real time.

[0025] In a preferred embodiment of the present invention, the pressure measurement module of the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure is provided with at least two pressure sensing points.

[0026] The first pressure sensing point is at the same height as the liquid level in the diverter bottle, and is used to measure the height pressure generated by the pressure adjustment height.

[0027] The second pressure sensor is connected to the ventricle and is used to measure the current pressure in the ventricle.

[0028] The main control circuit board calculates the currently set flow rate based on the pressure difference between the first pressure sensing point and the second pressure sensor point, and displays it on the display screen.

[0029] The technical advantages are as follows: By setting up two pressure sensing points to measure the height pressure at the shunt bottle and the real-time pressure inside the ventricle, respectively, the main control circuit board can calculate and display the cerebrospinal fluid drainage rate based on the pressure difference, achieving quantitative monitoring of the drainage status. This not only improves the accuracy and real-time performance of intracranial pressure monitoring but also allows medical staff to intuitively grasp the drainage rate, promptly identify tube blockage or abnormalities, and enhance the overall safety and clinical ease of use of the drainage system.

[0030] In a preferred embodiment of the present invention, the pressure regulating module of the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure includes a guide rail, a shunt bottle, a sliding locking element, and a shunt bottle catheter.

[0031] The guide rail has graduations.

[0032] The diverter bottle slides on the guide rail via the sliding locking member, adjusting its height vertically and locking it in place.

[0033] One end of the diversion bottle conduit is inserted into the diversion bottle, and the other end is connected to the drainage module.

[0034] By adjusting the height of the diversion bottle to change the height pressure generated by its liquid level, a pressure difference is formed with the ventricular pressure, thereby achieving gravity-based regulation of the drainage flow rate.

[0035] Its technical advantages lie in the following: By incorporating graduated guide rails and a sliding, locking diversion bottle structure, the height of the diversion bottle can be precisely adjusted vertically, altering the hydrostatic pressure generated by the liquid level and achieving gravity-based drainage flow rate regulation. Medical personnel can intuitively and flexibly adjust the diversion bottle height based on real-time displayed intracranial pressure values ​​to maintain the stability and safety of cerebrospinal fluid drainage. The sliding locking mechanism reliably secures the diversion bottle after adjustment, preventing accidental slippage that could cause pressure changes and improving adjustment accuracy and safety.

[0036] In a preferred embodiment of the present invention, the pressure regulating module of the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure further includes an infusion stand locking clamp.

[0037] The infusion stand locking clamp includes a fixed end and a movable clamp.

[0038] The fixed end is mounted on the guide rail.

[0039] The size of the clamp opening of the movable clamp is controlled by bolts and is used for mounting on the infusion stand.

[0040] Its technical advantages are as follows: the locking clamp of the IV stand allows the pressure regulating module to be securely installed on a standard IV stand; the movable clamp can be adjusted by bolts to fit stands of different diameters, making installation simple and the connection firm, facilitating rapid bedside deployment. The overall structure is simple, the adjustment is intuitive, and the positioning is reliable, enabling precise control of cerebrospinal fluid drainage flow.

[0041] In a preferred embodiment of the present invention, the pressure measurement module of the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure further includes a zero-position bracket.

[0042] The zero-position bracket includes a main mounting plate and positioning buckles.

[0043] The positioning buckle is installed on the main body mounting plate, slides on the guide rail, adjusts its height in the vertical direction, and locks it in place.

[0044] The pressure sensor is fixed to the sliding locking member. In a preferred embodiment of the present invention, in the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure, the fluid collection module includes a fluid collection bag and a three-way valve for fluid collection.

[0045] The collection bag is positioned below the diversion bottle.

[0046] The liquid collection three-way valve is used to control the connection between the liquid collection bag and the diversion bottle.

[0047] Its technical advantages are as follows: by setting a collection bag below the diversion bottle and using a three-way valve to control the connection, the cerebrospinal fluid after drainage and pressure regulation can be collected in an orderly manner, realizing the safe storage and quantitative management of the drainage fluid.

[0048] A method of using an external ventricular drainage device for real-time monitoring of intracranial pressure, comprising:

[0049] The drainage module is connected to the patient's ventricle, allowing cerebrospinal fluid to be drawn out through the drainage module and filling the drainage pathway with fluid.

[0050] The pressure measurement module is activated to establish fluid communication with the drainage module, and the height pressure generated by the pressure adjustment height and the current pressure of the ventricle are measured respectively.

[0051] Real-time acquisition of altitude and ventricular pressure data, and calculation of pressure difference.

[0052] Based on the pressure difference, the cerebrospinal fluid flow rate is calculated, and the intracranial pressure value and flow rate information are displayed.

[0053] Based on the displayed results, the height of the diversion bottle in the pressure regulating module is adjusted to control the cerebrospinal fluid drainage flow rate, so that the intracranial pressure is maintained within a preset range.

[0054] When an abnormal pressure change is detected, an alarm will be automatically issued, prompting that action needs to be taken.

[0055] The external ventricular drainage device for real-time monitoring of intracranial pressure is the device described above.

[0056] In a preferred embodiment of the present invention, in the method of using the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure, the calculation of cerebrospinal fluid flow includes:

[0057] According to Bernoulli's equation ,in, This refers to fluid pressure. For fluid density, For flow rate, For fluid height, It is a constant.

[0058] According to the continuity equation, the volumetric flow rate of a fluid remains constant during flow. ,in, Cerebrospinal fluid flow rate and The cross-sectional area before and after the flow. and The velocity before and after the flow.

[0059] Establish the relationship between pressure and cerebrospinal fluid flow ,in, To calculate the pressure difference, , For high-pressure data, This is ventricular pressure data.

[0060] Its technical advantages lie in the following: By establishing a mathematical relationship between pressure and flow rate based on Bernoulli's equation and the flow continuity equation, the measured height pressure and ventricular pressure can be converted into quantitative flow parameters, enabling real-time calculation and display of the cerebrospinal fluid drainage rate. Using the pressure difference between two pressure sensing points as the calculation basis, it reflects the dynamic balance between the hydrostatic pressure difference caused by changes in the height of the shunt bottle and the actual pressure within the ventricle, thus allowing for a direct assessment of whether the drainage status is normal.

[0061] In a preferred embodiment of the present invention, the method of using the above-described external ventricular drainage device for real-time monitoring of intracranial pressure further includes, before activating the pressure measurement module:

[0062] Turn on the infrared lamp to align the detection plane of the pressure measurement module with the patient's external auditory canal and perform reference height registration and zeroing.

[0063] Correct the pressure difference in the pressure data collected after zeroing. ,in, This represents the sensor deviation value.

[0064] The corrected pressure difference Substitute the pressure-cerebrospinal fluid flow relationship into the formula and recalculate the corrected cerebrospinal fluid flow.

[0065] The pressure measurement module automatically enters a low-power mode when there is no operation, and can be woken up by a button or external signal to continue measurement.

[0066] Its technical advantages are as follows: By establishing a unified pressure measurement benchmark, it significantly reduces zero-point error and improves the accuracy and repeatability of intracranial pressure measurement. Deviation correction is applied to the data collected after zeroing to compensate for sensor errors and obtain more accurate pressure difference values, making the calculated cerebrospinal fluid flow results more reliable. Furthermore, by setting a low-power management mode, the pressure measurement module automatically enters energy-saving mode when not in use, effectively extending battery life while ensuring continuous monitoring, and improving the applicability and efficiency of the device in bedside and portable scenarios.

[0067] The beneficial effects of the embodiments of the present invention are:

[0068] This invention organically combines a drainage module, a pressure measurement module, a pressure regulation module, and a fluid collection module to construct a structurally complete and functionally interconnected external ventricular drainage system. The drainage module stably drains cerebrospinal fluid from the ventricles, providing a continuous fluid pathway for pressure measurement and regulation. The reference height registration design between the pressure measurement module and the pressure regulation module ensures that the pressure measurement reference corresponds to the zero point of the shunt bottle scale, guaranteeing the consistency of measurement data with drainage height and improving the accuracy of intracranial pressure measurement and the reliability of system calibration.

[0069] This invention employs a high-sensitivity pressure sensor based on a silicon piezoresistive or Wheatstone bridge structure in the pressure measurement module. This sensor can measure cerebrospinal fluid pressure in real time and convert it into an electrical signal, which is then displayed in real time via the main control circuit board and a screen. The module is equipped with dual pressure sensing points, simultaneously acquiring the pressure at the shunt bottle level and the intraventricular pressure. By calculating the pressure difference between these two points, it dynamically estimates and displays the drainage volume, thereby achieving synchronous monitoring of intracranial pressure and drainage volume, improving the intuitiveness and accuracy of clinical judgment.

[0070] This invention employs infrared-assisted zeroing technology, enabling the detection plane of the pressure measurement module to be horizontally aligned with the patient's external auditory canal, achieving automatic registration of the reference height and significantly reducing zero-point error. Combined with one-button zeroing, system calibration can be completed quickly, offering convenient operation and high repeatability, providing a stable reference for continuous monitoring.

[0071] This invention utilizes a sliding, adjustable, graduated guide rail structure for the diversion bottle, allowing medical personnel to intuitively adjust the bottle height based on real-time pressure or flow information, precisely controlling the drainage flow rate by gravity. A locking mechanism ensures the stability of the diversion bottle in the set position, preventing accidental slippage that could cause sudden changes in drainage flow, thus enhancing safety and adjustment accuracy. Attached Figure Description

[0072] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0073] Figure 1 This is a schematic diagram of the module structure of the external ventricular drainage device for real-time monitoring of intracranial pressure according to the present invention;

[0074] Figure 2 This is a front structural diagram of the external ventricular drainage device for real-time monitoring of intracranial pressure according to the present invention.

[0075] Figure 3 This is a schematic diagram of the rear structure of the external ventricular drainage device for real-time monitoring of intracranial pressure according to the present invention;

[0076] Figure 4 This is a schematic diagram of the infusion stand locking clip structure of the external ventricular drainage device for real-time monitoring of intracranial pressure according to the present invention;

[0077] Figure 5 This is a partially enlarged schematic diagram of the back of the external ventricular drainage device for real-time monitoring of intracranial pressure according to the present invention.

[0078] Figure 6 This is a schematic diagram of the installation location of the pressure measurement module in the external ventricular drainage device for real-time monitoring of intracranial pressure according to the present invention.

[0079] Figure 7 This is a schematic diagram of the back structure of the pressure measurement module installation location of the external ventricular drainage device for real-time monitoring of intracranial pressure according to the present invention.

[0080] Figure 8 This is a schematic diagram of the internal structure of the pressure measurement module of the external ventricular drainage device for real-time monitoring of intracranial pressure according to the present invention.

[0081] In the diagram: 1-ventricular catheter; 2-connecting tubing; 3-drainage three-way valve; 4-sensor housing; 5-pressure sensor; 6-display screen; 7-power supply unit; 8-infrared lamp; 9-sensor three-way valve; 10-guide rail; 11-diverter bottle; 12-sliding locking element; 13-diverter bottle tubing; 14-collection bag; 15-collection three-way valve; 16-drainage module; 17-pressure measuring module; 18-pressure regulating module; 19-collection module; 20-infusion stand locking clamp; 21-zero position bracket. Detailed Implementation

[0082] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0083] Please refer to Figures 1 to 8The first embodiment of the present invention provides an external ventricular drainage device for real-time monitoring of intracranial pressure, comprising a drainage module 16, a pressure measuring module 17, a pressure regulating module 18, and a fluid collection module 19; the drainage module 16 draws cerebrospinal fluid from the ventricles; the pressure measuring module 17 is connected to the drainage module 16, measures the cerebrospinal fluid pressure, converts the pressure signal into an electrical signal, and displays the intracranial pressure value in real time; a reference height registration is set between the pressure measuring module 17 and the pressure regulating module 18, so that the detection plane of the pressure measuring module 17 corresponds to the zero point of the scale of the pressure regulating module 18; the pressure regulating module 18 is connected to the drainage module 16, and controls the flow rate of cerebrospinal fluid drawn out by the drainage module 16 by adjusting the height of the diversion bottle 11; the fluid collection module 19 is connected to the drainage module 16, and collects the drawn cerebrospinal fluid.

[0084] In a preferred embodiment of the present invention, in the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure, the drainage module 16 includes a ventricular catheter 1, a connecting line 2, and a drainage three-way valve 3; one end of the ventricular catheter 1 is inserted into the ventricle, and the other end is connected to the pressure measuring module 17 and the pressure regulating module 18 through the connecting line 2; the drainage three-way valve 3 is used to switch between drainage, closure, and injection modes.

[0085] Its technical advantages are as follows: It ensures stable delivery of cerebrospinal fluid through fluid circuit connectivity, providing a continuous, closed fluid column for the pressure measurement module; the three-way drainage valve 3 can quickly switch between drainage, closure, and injection modes, facilitating flushing, sampling, or emergency occlusion in different clinical scenarios, improving operational flexibility while reducing the risk of misoperation and complications. It facilitates bedside flushing to clear blocked tubes, non-invasive sampling, and allows for disinfection or disposable replacement; the overall structure is simple and highly compatible.

[0086] In a preferred embodiment of the present invention, in the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure, the pressure measuring module 17 includes a sensor housing 4, a pressure sensor 5, a main control circuit board, a display screen 6, input buttons, a power supply unit 7, an infrared lamp 8, and a sensor three-way valve 9; the sensor three-way valve 9 is used to control the connection between the drainage module 16, the pressure measuring module 17, and the pressure regulating module 18; the pressure sensor 5, based on a silicon piezoresistive or Wheatstone bridge structure, contacts the drained cerebrospinal fluid, measures the cerebrospinal fluid pressure, and transmits it to the main control circuit board for processing, converting the pressure signal into an electrical signal; the display screen 6 is used to display pressure values ​​and prompt information in real time; the input buttons are used to sense the operator's input commands, which include at least one of low-power management, reference height registration and zeroing, pressure detection, and infrared lamp control; the power supply unit 7 is used to provide power; the infrared lamp 8 is used to assist in adjusting the pressure sensor 5 to be flush with the patient's external auditory canal, reducing zero-point error.

[0087] The pressure measurement module 17 has a low power management function. After running for 5 minutes, it automatically enters a low power mode and the display screen 6 turns off. The pressure can be viewed again by briefly pressing the input button, thereby reducing energy consumption and extending the service life of the power supply unit 7.

[0088] The pressure measurement module 17 has a reference height registration and zeroing function. By pressing and holding the input button, the current pressure state will be used as the reference zero point.

[0089] The pressure measurement module 17 has an infrared lamp control function. When installed at a distance, the infrared ray lamp 8 is used to assist in adjusting the module to be flush with the patient's external auditory canal, thereby reducing zero-point error. The infrared ray lamp 8 can be switched on and off by double-clicking the input button.

[0090] The pressure measurement module 17 has a pressure detection function. If a large fluctuation in pressure is detected within a certain time difference, it indicates that a pipe blockage has occurred, and an alarm will be triggered.

[0091] Its technical advantages lie in the following: By incorporating a pressure sensor 5 that directly contacts the cerebrospinal fluid, it can accurately detect the cerebrospinal fluid pressure in real time and convert it into an electrical signal, thereby achieving continuous monitoring of intracranial pressure. The module includes a main control circuit board, a display screen 6, and input buttons, enabling integrated data acquisition, processing, and display. This allows medical staff to intuitively view real-time intracranial pressure values ​​and related prompts, making operation simple. With the assistance of an infrared lamp 8, the pressure measuring plane can be accurately aligned with the patient's external auditory canal, achieving zeroing at the reference height and effectively reducing zero-point error.

[0092] In a preferred embodiment of the present invention, in the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure, the pressure measuring module 17 switches the flow path through the sensor three-way valve 9, and can selectively enable the pressure sensor 5 to measure the cerebrospinal fluid pressure or the height pressure generated by the liquid level of the diversion bottle 11 in real time.

[0093] In a preferred embodiment of the present invention, in the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure, the pressure measuring module 17 is provided with at least two pressure sensing points; the first pressure sensing point is at the same height as the liquid level of the diversion bottle 11, and is used to measure the height pressure generated by the pressure adjustment height; the second pressure sensor 5 is connected to the ventricle and is used to measure the current pressure of the ventricle; the main control circuit board calculates the currently set flow rate based on the pressure difference between the first pressure sensing point and the second pressure sensor 5, and displays it on the display screen 6.

[0094] Its technical advantages lie in the following: By setting two pressure sensing points to measure the height pressure at the shunt bottle 11 and the real-time pressure inside the ventricle, the main control circuit board can calculate and display the cerebrospinal fluid drainage rate based on the pressure difference, achieving quantitative monitoring of the drainage status. This not only improves the accuracy and real-time performance of intracranial pressure monitoring but also allows medical staff to intuitively grasp the drainage rate, promptly identify tube blockages or abnormalities, and enhance the overall safety and clinical usability of the drainage system.

[0095] In a preferred embodiment of the present invention, in the above-described external ventricular drainage device for real-time monitoring of intracranial pressure, the pressure regulating module 18 includes a guide rail 10, a diversion bottle 11, a sliding locking member 12, and a diversion bottle conduit 13; the guide rail 10 has graduations; the diversion bottle 11 slides on the guide rail 10 via the sliding locking member 12, adjusting its height vertically and locking it; one end of the diversion bottle conduit 13 is inserted into the diversion bottle 11, and the other end is connected to the drainage module 16. By adjusting the height of the diversion bottle 11, the height pressure generated by its liquid level is changed, forming a pressure difference with the ventricular pressure, thereby achieving gravity-based regulation of the drainage flow rate.

[0096] Its technical advantages are as follows: By setting up a graduated guide rail and a sliding, locking diversion bottle 11, the height of the diversion bottle 11 can be precisely adjusted vertically, changing the hydrostatic pressure generated by the liquid level in the diversion bottle, thus achieving gravity-based drainage flow rate regulation. Medical staff can intuitively and flexibly adjust the height of the diversion bottle 11 based on the real-time displayed intracranial pressure value to maintain the stability and safety of cerebrospinal fluid drainage. The sliding locking mechanism reliably fixes the position of the diversion bottle 11 after adjustment, preventing accidental sliding that could cause pressure changes, and improving adjustment accuracy and safety of use.

[0097] In a preferred embodiment of the present invention, in the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure, the pressure regulating module 18 further includes an infusion stand locking clamp; the infusion stand locking clamp 20 includes a fixed end and a movable clamp head; the fixed end is mounted on the guide rail 10; the clamping size of the movable clamp head is controlled by bolts and is used to mount it on the infusion stand.

[0098] Its technical advantages are as follows: the locking clamp of the IV stand allows the pressure regulating module to be securely installed on a standard IV stand; the movable clamp can be adjusted by bolts to fit stands of different diameters, making installation simple and the connection firm, facilitating rapid bedside deployment. The overall structure is simple, the adjustment is intuitive, and the positioning is reliable, enabling precise control of cerebrospinal fluid drainage flow.

[0099] In a preferred embodiment of the present invention, in the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure, the pressure measuring module 17 further includes a zero-position bracket; the zero-position bracket 21 includes a main hanging plate and a positioning buckle; the positioning buckle is installed on the main hanging plate, slides on the guide rail 10, adjusts its height in the vertical direction and locks it; the pressure sensor 5 is fixed on the sliding locking member 12.

[0100] In a preferred embodiment of the present invention, in the above-described external ventricular drainage device for real-time monitoring of intracranial pressure, the fluid collection module 19 includes a fluid collection bag 14 and a fluid collection three-way valve 15; the fluid collection bag 14 is disposed below the diversion bottle 11; the fluid collection three-way valve 15 is used to control the connection between the fluid collection bag 14 and the diversion bottle 11.

[0101] Its technical advantages are as follows: by setting a collection bag below the diversion bottle and using a three-way valve to control the connection, the cerebrospinal fluid after drainage and pressure regulation can be collected in an orderly manner, realizing the safe storage and quantitative management of the drainage fluid.

[0102] Please refer to Figures 1 to 8 A second embodiment of the present invention provides a method for using an external ventricular drainage device for real-time monitoring of intracranial pressure, comprising: connecting the drainage module 16 to the patient's ventricle, allowing cerebrospinal fluid to be drawn out through the drainage module 16, and filling the drainage pathway with liquid; activating the pressure measuring module 17 to fluidly communicate with the drainage module 16, and measuring the height pressure generated by the pressure adjustment height and the current pressure of the ventricle respectively; collecting height pressure data and ventricle pressure data in real time, and calculating the pressure difference; calculating the cerebrospinal fluid flow rate based on the pressure difference, and displaying the intracranial pressure value and flow rate information; adjusting the height of the diversion bottle 11 in the pressure regulating module 18 according to the display results, controlling the cerebrospinal fluid drainage flow rate, and maintaining the intracranial pressure within a preset range; automatically issuing an alarm when an abnormal pressure change is detected, indicating that further action is needed; the external ventricular drainage device for real-time monitoring of intracranial pressure is the device described above.

[0103] In a preferred embodiment of the present invention, in the method of using the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure, the calculation of cerebrospinal fluid flow includes: according to Bernoulli's equation, ,in, This refers to fluid pressure. For fluid density, For flow rate, For fluid height, It is a constant; according to the flow continuity equation, the volumetric flow rate remains constant during the flow process. ,in, Cerebrospinal fluid flow rate and The cross-sectional area before and after the flow. and Flow velocities before and after flow; establish the relationship between pressure and cerebrospinal fluid flow rate. ,in, To calculate the pressure difference, , For high-pressure data, This is ventricular pressure data.

[0104] Its technical advantages lie in the following: By establishing a mathematical relationship between pressure and flow rate based on Bernoulli's equation and the flow continuity equation, the measured height pressure and ventricular pressure can be converted into quantitative flow parameters, enabling real-time calculation and display of the cerebrospinal fluid drainage rate. Using the pressure difference between two pressure sensing points as the calculation basis, it reflects the dynamic balance between the hydrostatic pressure difference caused by changes in the height of the shunt bottle and the actual pressure within the ventricle, thus allowing for a direct assessment of whether the drainage status is normal.

[0105] In a preferred embodiment of the present invention, the method of using the above-mentioned external ventricular drainage device for real-time monitoring of intracranial pressure further includes, before activating the pressure measuring module 17: activating the infrared lamp 8, making the detection plane of the pressure measuring module 17 flush with the patient's external auditory canal, and performing reference height registration and zeroing; and correcting the pressure difference in the pressure data collected after zeroing. ,in, The sensor deviation value; the corrected pressure difference Substitute the pressure-cerebrospinal fluid flow relationship into the formula to recalculate the corrected cerebrospinal fluid flow; the pressure measurement module 17 automatically enters a low-power mode when not in operation, and can be woken up by a button or external signal to continue measurement.

[0106] Its technical advantages are as follows: By establishing a unified pressure measurement benchmark, it significantly reduces zero-point error and improves the accuracy and repeatability of intracranial pressure measurement. Deviation correction is applied to the data collected after zeroing to compensate for sensor errors and obtain more accurate pressure difference values, making the calculated cerebrospinal fluid flow results more reliable. Furthermore, by setting a low-power management mode, the pressure measurement module automatically enters energy-saving mode when not in use, effectively extending battery life while ensuring continuous monitoring, and improving the applicability and efficiency of the device in bedside and portable scenarios.

[0107] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. An external ventricular drainage device for real-time monitoring of intracranial pressure, characterized in that, It includes a drainage module (16), a pressure measurement module (17), a pressure regulating module (18), and a liquid collection module (19). The drainage module (16) draws cerebrospinal fluid out of the ventricles; The pressure measurement module (17) is connected to the drainage module (16) to measure the cerebrospinal fluid pressure, convert the pressure signal into an electrical signal, and display the intracranial pressure value in real time. A reference height registration is set between the pressure measuring module (17) and the pressure regulating module (18) so that the detection plane of the pressure measuring module (17) corresponds to the zero point of the scale of the pressure regulating module (18); The pressure regulating module (18) is connected to the drainage module (16), and the flow rate of cerebrospinal fluid drawn out by the drainage module (16) is controlled by adjusting the height of the diversion bottle (11); The fluid collection module (19) is connected to the drainage module (16) to collect the drained cerebrospinal fluid.

2. The external ventricular drainage device for real-time monitoring of intracranial pressure according to claim 1, characterized in that, The drainage module (16) includes a ventricular catheter (1), a connecting tube (2), and a drainage three-way valve (3). One end of the ventricular catheter (1) is inserted into the ventricle, and the other end is connected to the pressure measuring module (17) and the pressure regulating module (18) through the connecting pipe (2); The drainage three-way valve (3) is used to switch between drainage, closure and injection modes.

3. The external ventricular drainage device for real-time monitoring of intracranial pressure according to claim 1, characterized in that, The pressure measurement module (17) includes a sensor housing (4), a pressure sensor (5), a main control circuit board, a display screen (6), input buttons, a power supply unit (7), an infrared lamp (8), and a sensor three-way valve (9). The sensor three-way valve (9) is used to control the connection between the drainage module (16), the pressure measuring module (17) and the pressure regulating module (18); The pressure sensor (5) contacts the extracted cerebrospinal fluid, measures the cerebrospinal fluid pressure, and transmits the data to the main control circuit board for processing, converting the pressure signal into an electrical signal. The display screen (6) is used to display pressure values ​​and prompt information in real time; The input buttons are used to sense the operator's input commands, which include at least one of low power management, reference height registration and zeroing, pressure detection, and infrared light control. The power supply unit (7) is used to supply power; The infrared lamp (8) is used to assist in adjusting the pressure sensor (5) to be flush with the patient's external auditory canal.

4. The external ventricular drainage device for real-time monitoring of intracranial pressure according to claim 3, characterized in that, The pressure measurement module (17) switches the flow path through the sensor three-way valve (9), and can selectively make the pressure sensor (5) measure the pressure of the cerebrospinal fluid or the height pressure generated by the liquid level of the diversion bottle (11) in real time.

5. The external ventricular drainage device for real-time monitoring of intracranial pressure according to claim 4, characterized in that, The pressure measurement module (17) is provided with at least two pressure sensing points; The first pressure sensing point is at the same height as the liquid level in the diverter bottle (11), and is used to measure the height pressure generated by the pressure adjustment height. The second pressure sensor (5) is connected to the ventricle and is used to measure the current pressure of the ventricle; The main control circuit board calculates the currently set flow rate based on the pressure difference between the first pressure sensing point and the second pressure sensor (5) point, and displays it on the display screen (6).

6. The external ventricular drainage device for real-time monitoring of intracranial pressure according to claim 1, characterized in that, The pressure regulating module (18) includes a guide rail (10), a diversion bottle (11), a sliding locking component (12), and a diversion bottle conduit (13). The guide rail (10) has a scale. The diversion bottle (11) slides on the guide rail (10) via the sliding locking member (12), and its height is adjusted and locked in the vertical direction; One end of the diversion bottle conduit (13) is inserted into the diversion bottle (11), and the other end is connected to the drainage module (16).

7. The external ventricular drainage device for real-time monitoring of intracranial pressure according to claim 6, characterized in that, The pressure regulating module (18) also includes an infusion stand locking clamp (20); The infusion stand locking clamp (20) includes a fixed end and a movable clamp; The fixed end is mounted on the guide rail (10); The size of the clamp opening of the movable clamp is controlled by bolts and is used for mounting on the infusion stand.

8. The method of using the external ventricular drainage device for real-time monitoring of intracranial pressure according to claim 7, characterized in that, The pressure measurement module (17) also includes a zero-position bracket (21). The zero-position bracket (21) includes a main hanging plate and a positioning buckle; The positioning buckle is installed on the main body hanging plate, slides on the guide rail (10), adjusts the height in the vertical direction and locks it; The pressure sensor (5) is fixed on the sliding locking member (12).

9. The external ventricular drainage device for real-time monitoring of intracranial pressure according to claim 1, characterized in that, The liquid collection module (19) includes a liquid collection bag (14) and a liquid collection three-way valve (15). The collection bag (14) is positioned below the diversion bottle (11); The liquid collection three-way valve (15) is used to control the connection between the liquid collection bag (14) and the diversion bottle (11).

10. A method of using an external ventricular drainage device for real-time monitoring of intracranial pressure, characterized in that, include: The drainage module (16) is connected to the patient's ventricle so that cerebrospinal fluid is drawn out through the drainage module (16) and the drainage pathway is filled with fluid. Start the pressure measurement module (17) to make it fluidly connected with the drainage module (16) and measure the height pressure generated by the pressure adjustment height and the current pressure of the ventricle respectively; Real-time acquisition of altitude and ventricular pressure data, and calculation of pressure difference; Based on the pressure difference, the cerebrospinal fluid flow rate is calculated, and the intracranial pressure value and flow rate information are displayed. According to the display results, adjust the height of the diversion bottle (11) in the pressure regulating module (18) to control the cerebrospinal fluid drainage flow rate and keep the intracranial pressure within the preset range; When an abnormal pressure change is detected, an alarm will be automatically issued to prompt that action is required. The external ventricular drainage device for real-time monitoring of intracranial pressure is the external ventricular drainage device for real-time monitoring of intracranial pressure as described in any one of claims 1-7.

11. The method of using the external ventricular drainage device for real-time monitoring of intracranial pressure according to claim 10, characterized in that, The calculation of cerebrospinal fluid flow includes: According to Bernoulli's equation ,in, This refers to fluid pressure. For fluid density, For flow rate, For fluid height, It is a constant; According to the flow continuity equation, the volumetric flow rate remains constant during the flow process. ,in, Cerebrospinal fluid flow rate and The cross-sectional area before and after the flow. and The flow velocity before and after the flow; Establish the relationship between pressure and cerebrospinal fluid flow ,in, To calculate the pressure difference, , For high-pressure data, This is ventricular pressure data.

12. The method of using the external ventricular drainage device for real-time monitoring of intracranial pressure according to claim 11, characterized in that, Before activating the pressure measurement module (17), the following steps are also included: Turn on the infrared lamp (8) to make the detection plane of the pressure measuring module (17) flush with the patient's external auditory canal and perform reference height registration and zeroing. Correct the pressure difference in the pressure data collected after zeroing. ,in, This is the sensor deviation value; The corrected pressure difference Substitute the aforementioned relationship between pressure and cerebrospinal fluid flow rate into the formula for recalculating the corrected cerebrospinal fluid flow rate. The pressure measurement module (17) automatically enters a low-power mode when there is no operation, and can be woken up by a button or external signal to continue measurement.

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