Ventricular drainage device

Abstract

The ventricular drainage device comprises a connection catheter, the side wall of the connection catheter is connected with a pressure measuring branch pipe communicated with the connection catheter, the other end of the pressure measuring branch pipe is sleeved with a hollow deformation pressure measuring part in a sealed mode, and a sensor assembly for detecting the filling state of the deformation pressure measuring part is arranged above the deformation pressure measuring part. The liquid outlet section of the connection catheter is provided with a flow adjusting cavity, an elastic valve is arranged in the flow adjusting cavity, and the top of the flow adjusting cavity is provided with a magnetic attraction assembly for adjusting the size of an opening of the elastic valve. By adopting the device, the change of the flow of cerebrospinal fluid can be automatically adjusted, so that the intracranial pressure and the pressure of a pipeline are balanced; the arrangement of pipelines is reduced, the length of a detection pipeline is shortened, the flowing resistance of drainage liquid is reduced, and the accuracy of detecting parameters of intracranial pressure can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of ventricular drainage, and in particular to a ventricular drainage device. Background Art

[0002] Ventricular drainage catheterization is a new method for postoperative drainage in brain surgery. The key lies in the technical performance of the drainage catheter with a scalp needle. However, there has been no unified standard and equipment for postoperative drainage in brain surgery (neurosurgery). The current common practice is to implant a urinary catheter or ordinary silicone tube instead. The drainage effect is not ideal, and it is easy to get clogged. It is also difficult to fix the tube body, which brings troubles to clinical work.

[0003] In the prior art, it is disclosed that an intracranial pressure monitor is used to detect intracranial pressure and a three-way valve is added to the lumen of the ventricular drainage tube, a sensor is connected to the side of the three-way valve, and it is connected to the monitor to facilitate the detection of intracranial pressure. However, the intracranial pressure detector transmits the waveform of intracranial pressure to the workstation through the sensor, so as to understand the change of intracranial pressure. If drainage is required, craniotomy and intubation are required, which does not actually solve the problem of drainage; the second method will produce multiple pipelines, such as drainage pipelines, pressure measurement pipelines, etc., with many lines, and after being connected to the monitor, the pipeline will usually become much longer. The longer the pipeline, the greater the resistance it produces, so that the parameters for monitoring intracranial pressure may be biased. In addition, the three-way valve cannot adjust the flow rate, and the intracranial pressure needs to maintain a certain pressure. If the patient coughs or exerts other actions such as force, the displacement of cerebrospinal fluid may increase, and when the three-way valve opening is small, the intracranial pressure will increase; if the three-way valve is always opened to the maximum, the more drainage is done, which is easy to cause low intracranial pressure, and then lead to nausea, vomiting, and even impaired consciousness. Utility Model Content

[0004] The technical problem to be solved by the present application is to provide a ventricular drainage device that can detect the pressure in the pipeline while draining cerebrospinal fluid, and after receiving feedback from the sensor, adjust the size of the valve opening and closing at the drainage port to drain, thereby balancing the intracranial pressure.

[0005] In order to solve the above technical problems, this application adopts the following technical solutions:

[0006] A ventricular drainage device comprises a connecting catheter, the side wall of which is connected to a pressure measuring branch connected thereto, a sealing sleeve at the other end of the pressure measuring branch is provided with a hollow deformation pressure measuring portion, a sensor assembly for detecting the filling state of the deformation pressure measuring portion is provided above the deformation pressure measuring portion, a flow regulating cavity is provided at the liquid outlet section of the connecting catheter, an elastic valve is provided in the flow regulating cavity, a magnetic suction assembly for adjusting the opening size of the elastic valve is provided at the top of the flow regulating cavity, when cerebrospinal fluid is injected into and filled with the deformation pressure measuring portion, the top of the deformable pressure measuring portion contacts the sensor assembly, indicating that the internal pressure of the connecting catheter increases and the intracranial pressure increases, the sensor assembly feeds back a signal to the controller, and the controller drives the magnetic suction assembly to work, so that the opening of the elastic valve becomes larger, the drainage flow is increased, and the intracranial pressure is balanced.

[0007] In order to enable the deformation-deformable pressure measuring part to be deformed by a relatively small pressure, in some embodiments, the deformation-deformable pressure measuring part is a pressure measuring water bag.

[0008] In order to allow the deformation pressure measuring portion to contact the sensor assembly, in some embodiments, the pressure measuring water bag bulges upward when inflated.

[0009] In some embodiments, the sensor assembly includes a fixing plate and a pressure sensor. The fixing plate is fixed to the middle of the connecting catheter, and the pressure sensor is provided at the bottom of the fixing plate.

[0010] In order to improve the smoothness of drainage and reduce the resistance of drainage, in some embodiments, the elastic valve is tilted in the flow regulating cavity, wherein the upper part is in contact with the inner wall of the flow regulating cavity.

[0011] In order to enable the magnetic attraction component to have the function of adjusting the opening of the elastic valve to increase the flow, in some embodiments, the magnetic attraction component includes a cover body, an electromagnet is provided on the top of the cover body, an adjustment rod is provided below the electromagnet, a circular hole is provided on the top of the flow regulating cavity, and the bottom of the adjustment rod extends into the circular hole and contacts with the lower and middle part of the left end surface of the elastic valve.

[0012] In order to facilitate the fixing of the adjusting rod and automatically reset the adjusting rod, in some embodiments, a bracket for fixing the adjusting rod is further provided in the cover body, the adjusting rod is movably provided on the bracket, the side wall of the adjusting rod is provided with a round edge, and a spring is provided on the adjusting rod and between the round edge and the bracket.

[0013] Compared with the prior art, the present application achieves at least the following beneficial effects: compared with the prior art, the overall structure of the present device is light and simple, without complicated pipelines, a connecting catheter is added to the pipeline leading out of cerebrospinal fluid, and a signal of increased pressure is obtained through the filling and expansion of the deformation pressure measuring part and the contact of the sensor component, and the electromagnet of the magnetic suction component on the flow regulating chamber is energized to generate magnetic force to absorb and lift the regulating rod, and after the elastic valve is no longer subject to the resistance of the regulating rod, the cerebrospinal fluid flushes the elastic valve to enlarge its opening, thereby increasing the drainage flow, achieving pressure relief, and reducing congestion. When the pressure relief is completed, the shape The liquid in the deformable pressure measuring part is gradually deflated by the flow of cerebrospinal fluid and the effect of gravity. The deformable pressure measuring part is not in contact with the sensor assembly. After the pressure value of the sensor assembly changes, the electromagnet loses power, the adjustment rod is reset by the spring, and the elastic valve is restricted by the adjustment rod, and the opening becomes smaller, thereby achieving the effect of balancing the intracranial pressure. The device can automatically adjust the change of cerebrospinal fluid flow, thereby balancing the intracranial pressure and the pressure of the pipeline; the layout of the pipeline is reduced, the length of the detection pipeline is shortened, and the resistance of the drainage fluid flow is reduced, which can improve the accuracy of the parameters for detecting the intracranial pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] One or more embodiments of the present application will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0015] Figure 1 This is a three-dimensional schematic diagram of a ventricular drainage device according to one embodiment of the present application;

[0016] Figure 2 This is a front cross-sectional view of a ventricular drainage device according to one embodiment of the present application;

[0017] Figure 3 It shows Figure 2 A partial schematic diagram of the lifting rod at A in the middle abutting against the left end surface of the elastic valve;

[0018] Figure 4 It shows Figure 2 A partial schematic diagram showing the elastic valve opening becoming larger after the lifting rod at A in the middle is raised.

[0019] The numbers in the figure are: 1. connecting catheter; 101. pressure measuring branch pipe; 102. cylindrical pin; 103. flow regulating chamber; 2. clamp; 3. fixing plate; 4. pressure sensor; 5. deformation pressure measuring part; 6. magnetic suction component; 601. cover body; 602. electromagnet; 603. adjusting rod; 6031. round edge; 604. bracket; 605. spring; 7. elastic valve. DETAILED DESCRIPTION

[0020] The present application will be described in detail below with reference to the exemplary embodiments in the accompanying drawings. However, it should be understood that the present application can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided here to make the disclosure of the present application more complete and to fully convey the concept of the present application to those skilled in the art.

[0021] In the description of the present application, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present application.

[0022] In the prior art, a three-way valve is added to the lumen of the ventricular drainage tube, a sensor is connected to the side of the three-way valve, and the sensor is connected to a monitor to detect intracranial pressure. However, there are many, long and complicated pipelines, and it is inconvenient to adjust the flow and it is impossible to balance the intracranial pressure. After careful analysis, the inventor found that the main reason for the above problems in the existing cerebrospinal fluid drainage method is that, first of all, the three-way valve structure is used to monitor the pressure, and the sensor is connected, which requires at least one pipeline to be added. If the positive and negative pressure adjustment of the pipeline for detecting pressure is considered, a new pipeline needs to be added to connect the new equipment, so the number of pipelines will increase; secondly, the drainage bag connected to the cerebrospinal fluid can be selectively hung on the bed rails, but there is a certain distance between the position of electronic equipment such as monitors and the patient. When these detection pipelines and electronic equipment are connected, the pipelines will become longer. These detection pipelines will be more or less bent or raised and lowered from the bed to the electronic equipment, which will increase the corresponding resistance, thereby causing the intracranial pressure value fed back to the sensor by the pipeline to deviate; finally, when more lines of different forms are placed in one place, when these pipelines are moved, these pipelines may be entangled together, thus forming a messy state. Based on the above analysis, the inventor has improved the structure for monitoring the intracranial pressure of patients (also the cerebrospinal fluid pressure in the pipeline).

[0023] like Figure 1 As shown, in one embodiment of the ventricular drainage device of the present application, the device includes a connecting catheter 1 made of medical plastic material, the side wall of the connecting catheter 1 is connected to a pressure measuring branch 101 connected thereto, the other end sealing sleeve of the pressure measuring branch 101 is provided with a hollow deformation pressure measuring portion 5, and a sensor component for detecting its filling state is provided above the deformation pressure measuring portion 5, and a flow regulating cavity 103 is provided at the liquid outlet section of the connecting catheter 1, as shown in FIG. Figure 2 and Figure 3As shown, an elastic valve 7 is provided in the flow regulating cavity 103, and a magnetic attraction component 6 for adjusting the opening size of the elastic valve 7 is provided on the top of the flow regulating cavity 103. When cerebrospinal fluid is injected and filled in the deformation pressure measuring part 5, its top contacts the sensor component, indicating that the internal pressure of the connecting catheter 1 increases and the intracranial pressure of the patient increases. The sensor component feeds back the signal to the controller, and the controller drives the magnetic attraction component 6 to work, so that the opening of the elastic valve 7 becomes larger, the drainage flow is increased, and the intracranial pressure is balanced.

[0024] The middle part of the connecting catheter 1 is concave, and the pressure measuring branch 101 is vertically arranged on the top surface of the middle part. Compared with the inverted T structure, this structure arranges the pressure measuring branch 101, the deformation pressure measuring part 5 and the sensor assembly in the concave position of the connecting catheter 1, which can prevent the deformation pressure measuring part 5 and the sensor assembly from being accidentally touched when caring for the patient.

[0025] The flow regulating chamber 103 is tubular, and its diameter is slightly larger than the connecting catheter 1 .

[0026] In order to enable the deformation pressure measuring part 5 to achieve deformation under a relatively small pressure, the deformation pressure measuring part 5 is a pressure measuring water bag, and the structure of the pressure measuring water bag includes a sleeve sleeved on the pressure measuring branch pipe 101 and a bag connected to the sleeve. When the pressure measuring water bag is sleeved on the pressure measuring branch pipe 101, the inside is in a negative pressure state. When cerebrospinal fluid is injected and the pressure measuring water bag is filled, it bulges upward and hits the sensor assembly. The pressure measuring branch pipe 101 and the deformation pressure measuring part 5 are fixed by a clamp 2.

[0027] The bag of the deformation pressure measuring part 5 can be cylindrical, bellows-shaped or other common geometric shapes that can bulge upward.

[0028] The sensor assembly is used to detect the pressure generated when the deformation pressure measuring part 5 bulges, and includes a fixing plate 3 and a pressure sensor 4. The fixing plate 3 is fixed to the middle part of the connecting tube 1. More specifically, a cylindrical pin 102 is provided on the side wall of the recessed part of the connecting tube 1, and a buckle 301 is correspondingly provided at the bottom of the fixing plate 3. When the fixing plate 3 is pressed downward, the buckle 301 can clamp the cylindrical pin 102, thereby fixing the fixing plate 3. There are 4 corresponding places of the cylindrical pin 102 and the buckle 3-1 on the left and right, and notches are respectively opened on the left and right sides of the fixing plate 3 to avoid the connecting tube 1; the pressure sensor 4 is fixed to the bottom of the fixing plate 3 with screws or glue. The pressure sensor 4 is a miniature pressure sensor, and the specific model is SBT761D miniature pressure sensor.

[0029] In order to improve the smoothness of drainage and reduce the resistance of drainage, the elastic valve 7 is made of rubber material, elliptical, and obliquely arranged in the flow regulating cavity 103, wherein the upper part is in contact with the inner wall of the flow regulating cavity 103. When the flow is large, such as Figure 4As shown, the bottom of the elastic valve 7 will be pushed open and flipped upward by the pressure of the cerebrospinal fluid, thereby increasing the opening of the elastic valve 7.

[0030] A V-shaped groove is provided on the left end face of the elastic valve 7, so the wall thickness at the V-shaped groove is relatively thin, which makes it easier to open the elastic valve 7; and the adjustment rod 603 has the functions of adjusting the opening size of the elastic valve 7, and secondly, when the elastic valve 7 fails due to fatigue and cannot rebound, the bottom of the movable adjustment rod 603 can be used as a force point to press the elastic valve 7 down and reset it, so as to prevent the opening from being too large and the drainage from being too fast, resulting in a decrease in intracranial pressure.

[0031] In order to enable the magnetic attraction component 6 to have the function of regulating the elastic valve 7 to open and increase the flow rate, the magnetic attraction component 6 includes a cover body 601 sealed and fixed to the top of the flow regulating chamber 103, and an electromagnet 602 is provided on the top of the cover body 601. The electromagnet 602 generates magnetism by energizing the electromagnetic coil. A metal adjustment rod 603 is provided below the electromagnet 602. A circular hole is opened on the top of the flow regulating chamber 103. The bottom of the adjustment rod 603 extends into the circular hole and contacts with the lower and middle part of the left end face of the elastic valve 7, thereby preventing the elastic valve 7 from opening wide and draining too quickly.

[0032] In order to facilitate the fixing of the adjusting rod 603 and to make the adjusting rod 603 automatically reset, a bracket 604 for fixing the adjusting rod 603 is further provided in the cover body 601. The bracket 604 includes two vertical poles and a round piece. The round piece is fixed between the two vertical poles. A hole is opened in the round piece. The adjusting rod 603 is movably arranged on the bracket 604. The side wall of the adjusting rod 603 is provided with a round edge 6031. A spring 605 is provided on the adjusting rod 603 and between the round edge 6031 and the bracket 604. When the electromagnet 602 loses power, the adjusting rod 603 is reset by the reaction force of the spring 605.

[0033] When using the ventricular drainage device, it is connected to the cerebrospinal fluid drainage tube. When the intracranial pressure is normal, the deformation measuring part 5 on the connecting catheter 1 swells but does not reach the filling state. When the sensor component is not under pressure, no signal is fed back to the controller, the magnetic suction component 6 does not work, and the adjustment rod 603 is pressed on the left end surface of the elastic valve 7. The opening of the elastic valve 7 does not change, and the drainage is normal. When the patient coughs or exerts force, the cerebrospinal fluid suddenly increases, causing the intracranial pressure or the cerebrospinal fluid pressure of the connecting catheter 1 to increase, and the connecting catheter 1 When more cerebrospinal fluid is injected into the inner chamber, a part of the cerebrospinal fluid will enter the deformation pressure measuring part 5, the deformation pressure measuring part 5 is filled and bulged, and presses against the pressure sensor 4 on the sensor assembly. The pressure sensor 4 feeds back the signal to the controller, and the controller issues an instruction to energize the electromagnet 602 to generate magnetism. The electromagnet 602 absorbs and lifts the adjustment rod 603, and the elastic valve 7 in the flow regulating chamber 103 is not restricted by the adjustment rod 603. The pressure in the connecting catheter 1 is released, and the cerebrospinal fluid will flush the elastic valve 7. The elastic valve 7 is as follows: Figure 4As shown, it will flip up, making the opening larger, thereby increasing the outflow of cerebrospinal fluid and achieving pressure relief; after the pressure relief is completed, the cerebrospinal fluid in the deformation pressure measuring part 5 is driven by the flow and the action of gravity, and part of the cerebrospinal fluid is discharged, the deformation pressure measuring part 5 is no longer filled and is not in contact with the pressure sensor 4. After the pressure sensor 4 is not subjected to force, the information value changes and the information value is fed back to the controller. The controller issues an instruction to de-energize the electromagnet 602, and the adjustment rod 603 has no magnetic adsorption. The reaction force of the compressed spring 605 when lifted presses down the round edge 6031 on the adjustment rod 603, so that the adjustment rod 603 is reset, and the bottom of the adjustment rod 603 contacts the left end face of the elastic valve 7 again, limiting the elastic valve 7 from opening too large, so that the cerebrospinal fluid flows slowly and the intracranial pressure is balanced.

[0034] It should be understood that all the above embodiments are illustrative rather than restrictive, and various modifications or variations made by those skilled in the art to the specific embodiments described above based on the concept of the present application should all be within the protection scope of the present application.

Claims

1. A ventricular drainage device, characterized in that: It comprises a connecting catheter, the side wall of which is connected to a pressure measuring branch pipe which is in communication with the connecting catheter, a sealing sleeve at the other end of the pressure measuring branch pipe is provided with a hollow deformation pressure measuring portion, a sensor component for detecting the filling state of the deformation pressure measuring portion is provided above the deformation pressure measuring portion, a flow regulating cavity is provided at the liquid outlet section of the connecting catheter, an elastic valve is provided in the flow regulating cavity, and a magnetic suction component for adjusting the opening size of the elastic valve is provided at the top of the flow regulating cavity.

2. The device according to claim 1, characterized in that: The middle part of the connecting conduit is concave, and the pressure measuring branch pipe is vertically arranged on the top surface of the middle part.

3. The device according to claim 1, characterized in that: The deformation pressure measuring part is a pressure measuring water bag.

4. The device according to claim 3, characterized in that: The pressure measuring water bag bulges upward when filled.

5. The device according to claim 4, characterized in that: The sensor assembly comprises a fixing plate and a pressure sensor. The fixing plate is fixed to the middle of the connecting conduit, and the bottom of the fixing plate is provided with a pressure sensor.

6. The device according to claim 1, characterized in that: The elastic valve is arranged obliquely in the flow regulating cavity, wherein the upper part is in contact with the inner wall of the flow regulating cavity.

7. The device according to claim 1, characterized in that: The magnetic attraction component includes a cover body, an electromagnet is provided on the top of the cover body, an adjustment rod is provided below the electromagnet, a circular hole is opened on the top of the flow regulating cavity, the bottom of the adjustment rod extends into the circular hole and contacts with the lower middle part of the left end surface of the elastic valve.

8. The device according to claim 7, characterized in that: The cover body is also provided with a bracket for fixing the adjusting rod, the adjusting rod is movably arranged on the bracket, the side wall of the adjusting rod is provided with a round edge, and a spring is arranged on the adjusting rod, between the round edge and the bracket.

Images