Multifunctional three-way valve for craniocerebral drainage

Abstract

The utility model relates to a kind of multi-functional three-way valves for craniocerebral drainage, including valve shell, it is characterized by: the first chamber, second chamber, dosing flushing channel, first drainage channel, second drainage channel are equipped in the valve shell, the first chamber and second chamber are connected by second valve port, first drainage channel is communicated with the first chamber, dosing flushing channel and second drainage channel are communicated with the second chamber, first check valve is equipped in dosing flushing channel, first check valve keeps the tendency of closing from the second chamber to dosing flushing channel direction, still include the second check valve that always keeps the tendency of plugging the second valve port, the second check valve only allows liquid to flow from the first chamber to the second chamber direction.

Description

Technical Field

[0001] This utility model belongs to the technical field of medical devices, and in particular relates to a multifunctional three-way valve for cranial drainage. Background Technology

[0002] Intracranial pressure (ICP) needs to be maintained within a certain range, with normal ICP being 5-15 mmHg. Excessive or insufficient ICP can cause headaches, vomiting, papilledema, altered consciousness, changes in vital signs, and even brain herniation. When a person suffers a brain injury or intracranial lesion, blood or fluid accumulates in the brain, often accompanied by abnormal intracranial pressure. In such cases, surgical drainage, either external to the brain or outside the lesion, is necessary to relieve symptoms and provide treatment. Cranial drainage is frequently used in modern medicine for cerebral hemorrhage, hydrocephalus, and brain tumor surgery. It can reduce intracranial pressure, drain bloody cerebrospinal fluid, and allow for intracranial medication administration.

[0003] A Chinese utility model patent, ZL201120284585.6 (publication number CN202314546U), discloses a disposable cranial drainage device, including a drainage tube, a drainage bottle, a height adjustment plate with a graduated scale, a positioning component, an inlet tube, an outlet tube, a collection bag, and a height adjustment rope. The drainage bottle is printed with graduations and is fixed to the height adjustment plate with a graduated scale by a slider, allowing it to slide up and down. The upper end of the drainage bottle is connected to the inlet tube, and the other end of the inlet tube is connected to the drainage tube through a three-way valve with a Luer connector. The lower end of the drainage bottle is connected to the collection bag through the outlet tube. The intracranial pressure of the patient can be adjusted by the suspension height of the drainage device and the vertical displacement of the drainage bottle and the height adjustment plate. A laser positioning component ensures the relative position of the drainage device and the patient. Backflow of fluid will not occur, and the drainage measurement is accurate.

[0004] However, the aforementioned solutions have the following drawbacks: 1. They require frequent manual adjustment of the drainage rate by medical staff, which is complex and prone to human error, making precise adjustment difficult. This can lead to drainage that is too fast (causing a sudden drop in ventricular pressure, ventricular collapse, or brain tissue displacement) or too slow (failing to effectively reduce intracranial pressure and prolonging the course of the disease), failing to achieve "drainage on demand," increasing the workload of medical staff, and failing to meet the individualized needs of patients. 2. The existing devices mostly have open-type drug delivery and irrigation ports, resulting in prolonged contact between the drainage fluid and the external environment. They lack effective antibacterial and anti-backflow mechanisms, which can easily lead to intracranial infections (such as ventriculitis) or surgical site infections.

[0005] In conclusion, existing cranial drainage devices can be further improved. Summary of the Invention

[0006] The technical problem this invention aims to solve is to provide a multifunctional three-way valve for cranial drainage that has a reasonable structure and automatically closes the channel to stop drainage when the intracranial pressure is lower than a preset pressure, in light of the aforementioned existing technology.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a multifunctional three-way valve for cranial drainage, comprising a valve body, characterized in that: the valve body is provided with a first chamber, a second chamber, a drug administration and flushing channel for use with a syringe, a first drainage channel connected to a ventricular drainage catheter, and a second drainage channel connected to a drainage device; the first chamber and the second chamber are connected through a second valve port; the first drainage channel is connected to the first chamber; the drug administration and flushing channel and the second drainage channel are connected to the second chamber; the drug administration and flushing channel is provided with a first one-way valve, which maintains a tendency to close from the second chamber towards the drug administration and flushing channel; and a second one-way valve is also provided, which always maintains a tendency to block the second valve port; the second one-way valve only allows liquid to flow from the first chamber towards the second chamber.

[0008] As an improvement, the aforementioned first one-way valve includes a first valve stem, a first plug, and a first spring. A first valve port is provided within the drug delivery flushing channel. The first valve stem passes through the first valve port, and the first plug is located at the inner end of the first valve stem. The first spring acts on the first valve stem to keep the first plug in a blocking position on the first valve port. The first valve stem can be pushed open by a syringe connected to the drug delivery flushing channel. This one-way valve works well with syringes and is simple in design.

[0009] As an improvement, the aforementioned second check valve includes a second valve stem, a second plug, and a second spring. The valve housing also contains a third chamber, which communicates with the second chamber through a valve stem hole. The second valve stem passes through the valve stem hole and can move axially. The second plug is located at the inner end of the second valve stem. The second spring acts on the second valve stem to keep the second plug sealing the second valve opening. It also includes an adjusting cap that can rotate around its own axis. Rotating the adjusting cap adjusts the pressure applied to the second valve stem by the second spring. This check valve has a pressure regulating function; medical personnel can adjust the preset pressure value of the pressure knob according to the patient's actual condition to meet the intracranial pressure needs of different patients.

[0010] To achieve the pressure regulation function, the following method is adopted: the top of the aforementioned third chamber is constrained by a guide seat that can only move up and down. The guide seat has a threaded hole. The upper end of the second spring rests against the lower part of the guide seat. The adjusting cap is constrained to the upper end of the valve body. The adjusting cap has a threaded post that extends downward and is threadedly connected to the threaded hole. Rotating the adjusting cap can drive the guide seat to move up and down, thereby changing the compression of the second spring. The up and down movement of the guide seat through the threaded transmission principle facilitates fine adjustment.

[0011] As an improvement, a sealing ring is embedded in the outer periphery of the second valve stem, forming a seal between the second valve stem and the valve stem hole. The sealing ring prevents cerebrospinal fluid from leaking from the second chamber into the third chamber.

[0012] To provide a suitable support position for the spring, a spring seat is fixed to the upper end of the second valve stem. The spring seat is located in the third chamber, and the lower end of the second spring rests on the spring seat.

[0013] In a further improvement, the outer wall of the valve housing has outwardly protruding first connector post, second connector post, and third connector post. The drug delivery flushing channel passes through the first connector post, the first drainage channel passes through the second connector post, and the second drainage channel passes through the third connector post. The second connector post is a standard Luer female or male connector, and the third connector post is a standard Luer female or male connector. The first connector post facilitates connection to a syringe, the second connector post facilitates connection to a ventricle drainage catheter, and the third connector post facilitates connection to a drainage device.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] 1. The drug administration flushing channel is equipped with a first one-way valve to prevent backflow. When administering drugs and flushing the tubing, the first one-way valve is pushed open by the tip of the syringe to realize the drug administration flushing function and rapid sampling function. The whole process is in a closed state, which is fast and simple and avoids long-term contact between cerebrospinal fluid and air, thereby reducing the risk of intracranial infection (such as ventriculitis) or surgical site infection.

[0016] 2. A second one-way valve is installed between the first and second chambers. When the intracranial pressure is greater than the preset pressure value of the second one-way valve, the second valve port automatically opens, connecting the first and second drainage channels and initiating drainage. As cerebrospinal fluid flows out from the second drainage channel, the intracranial pressure gradually decreases, and the outflow rate decreases. When the intracranial pressure is lower than the pressure value set by the second one-way valve, the second valve port automatically closes, blocking the first and second drainage channels and stopping drainage. This addresses the potential risks of insufficient or excessive drainage. Because drainage is achieved automatically by opening and closing the channels, there is no need to constantly monitor and adjust the flow rate, reducing the workload of medical staff. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional view along the axial direction of the drainage channel of an embodiment of the present invention;

[0019] Figure 3 for Figure 2 A sectional view along line AA. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] like Figures 1-3 The image shown is a preferred embodiment of the present invention.

[0022] A multifunctional three-way valve for cranial drainage includes a valve body 1. The valve body 1 has a first chamber 1a, a second chamber 1b, a drug administration and flushing channel 1c for use with a syringe, a first drainage channel 1d connected to a ventricular drainage catheter, and a second drainage channel 1e connected to a drainage device. The outer wall of the valve body 1 has an outwardly protruding first connector post 11, a second connector post 12, and a third connector post 13. The drug administration and flushing channel 1c passes through the first connector post 11, the first drainage channel 1d passes through the second connector post 12, and the second drainage channel 1e passes through the third connector post 13. The second connector post 12 is a standard Luer female or male connector, and the third connector post 13 is a standard Luer female or male connector.

[0023] The first chamber 1a and the second chamber 1b are connected by a second valve port 2b. The first drainage channel 1d is connected to the first chamber 1a. The drug administration flushing channel 1c and the second drainage channel 1e are connected to the second chamber 1b. The drug administration flushing channel 1c is provided with a first one-way valve 3, which tends to close from the second chamber 1b to the drug administration flushing channel 1c. It also includes a second one-way valve 5, which always tends to block the second valve port 2b. The second one-way valve 5 only allows liquid to flow from the first chamber 1a to the second chamber 1b.

[0024] The first one-way valve 3 includes a first valve stem 31, a first plug 32, and a first spring 33. A first valve port 2a is provided in the drug administration flushing channel 1c. The first valve stem 31 passes through the first valve port 2a. The first plug 32 is located at the inner end of the first valve stem 31. The first spring 33 acts on the first valve stem 31 to keep the first plug 32 blocking the first valve port 2a. The first valve stem 31 can be pushed open by a syringe connected to the drug administration flushing channel 1c.

[0025] The second one-way valve 5 includes a second valve stem 51, a second plug 52, and a second spring 53. A third chamber 1f is also provided inside the valve housing 1. The third chamber 1f communicates with the second chamber 1b through a valve stem hole 2c. The second valve stem 51 passes through the valve stem hole 2c and can move axially. A sealing ring 4 is embedded on the outer periphery of the second valve stem 51, forming a seal between the second valve stem 51 and the valve stem hole 2c. The second plug 52 is located at the inner end of the second valve stem 51. The second spring 53 acts on the second valve stem 51 to keep the second plug 52 blocking the second valve port 2b. It also includes an adjusting cap 54 that can rotate around its own axis. Rotating the adjusting cap 54 adjusts the pressure applied to the second valve stem 51 by the second spring 53.

[0026] The top of the third chamber 1f is constrained by a guide seat 55 that can only move up and down. The guide seat 55 has a threaded hole 551. The upper end of the second spring 53 is held against the bottom of the guide seat 55. The adjusting cap 54 is constrained at the upper end of the valve body 1. The adjusting cap 54 has a threaded post 541 that extends downward and is threaded to the threaded hole 551. Rotating the adjusting cap 54 can drive the guide seat 55 to move up and down, thereby changing the compression of the second spring 53.

[0027] A spring seat 56 is fixed to the upper end of the second valve stem 51. The spring seat 56 is located in the third chamber 1f, and the lower end of the second spring 53 rests on the spring seat 56.

[0028] In use, connect the first drainage channel to the ventricle drainage catheter and the second drainage channel to the drainage device.

[0029] Rotating the adjusting cap 54 causes the guide seat 55 to move up and down, thereby changing the compression of the second spring 53 to adjust the pressure of the second one-way valve 5 (to match the intracranial pressure of different patients). When the intracranial pressure is greater than the preset pressure value of the second one-way valve 5, the second valve port 2b automatically opens, connecting the first drainage channel 1d and the second drainage channel 1e, and drainage begins. As cerebrospinal fluid flows out from the second drainage channel 1e, the intracranial pressure gradually decreases, and the outflow rate decreases. When the intracranial pressure is lower than the pressure value set by the second one-way valve 5, the second valve port 2b automatically closes, blocking the first drainage channel 1d and the second drainage channel 1e, stopping drainage, and resolving the potential risks of insufficient or excessive drainage. Because drainage is achieved by automatically opening and closing the channels, there is no need to constantly monitor and adjust the flow rate, which can reduce the workload of medical staff.

[0030] The drug administration flushing channel 1c is equipped with a first one-way valve 3, which has an anti-backflow mechanism. When administering drugs and flushing the tubing, the first one-way valve 3 is pushed open by the tip of the syringe to realize the drug administration flushing function and the immediate rapid sampling function. The whole process is in a closed state, which is fast and simple, and avoids long-term contact between cerebrospinal fluid and air, thereby reducing the risk of intracranial infection (such as ventriculitis) or surgical site infection.

[0031] It should be noted that in the description of this embodiment, the terms "front," "rear," "left," "right," "inner," "outer," "upper," and "lower," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are merely for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A multifunctional three-way valve for cranial drainage, comprising a valve body (1), characterized in that: The valve housing (1) is provided with a first chamber (1a), a second chamber (1b), a drug administration flushing channel (1c) for use with a syringe, a first drainage channel (1d) connected to a ventricle drainage catheter, and a second drainage channel (1e) connected to a drainage device. The first chamber (1a) and the second chamber (1b) are connected through a second valve port (2b). The first drainage channel (1d) is connected to the first chamber (1a). The drug administration flushing channel (1c) and the second drainage channel (1e) are connected to the second chamber (1b). The drug administration flushing channel (1c) is provided with a first one-way valve (3). The first one-way valve (3) tends to close from the second chamber (1b) to the drug administration flushing channel (1c). It also includes a second one-way valve (5) that always tends to block the second valve port (2b). The second one-way valve (5) only allows liquid to flow from the first chamber (1a) to the second chamber (1b).

2. The multifunctional three-way valve for craniocerebral drainage according to claim 1, characterized in that: The first one-way valve (3) includes a first valve stem (31), a first plug (32), and a first spring (33). The drug administration flushing channel (1c) is provided with a first valve port (2a). The first valve stem (31) passes through the first valve port (2a). The first plug (32) is located at the inner end of the first valve stem (31). The first spring (33) acts on the first valve stem (31) to keep the first plug (32) blocking the first valve port (2a). The first valve stem (31) can be pushed by a syringe connected to the drug administration flushing channel (1c) to open the first valve port (2a).

3. The multifunctional three-way valve for cranial drainage according to claim 1, characterized in that: The second one-way valve (5) includes a second valve stem (51), a second plug (52), and a second spring (53). The valve body (1) is also provided with a third chamber (1f). The third chamber (1f) is connected to the second chamber (1b) through the valve stem hole (2c). The second valve stem (51) is inserted in the valve stem hole (2c) and can move axially. The second plug (52) is located at the inner end of the second valve stem (51). The second spring (53) acts on the second valve stem (51) to keep the second plug (52) blocking the second valve port (2b). It also includes an adjusting cap (54) that can rotate around its own axis. Rotating the adjusting cap (54) can adjust the pressure applied to the second valve stem (51) by the second spring (53).

4. The multifunctional three-way valve for cranial drainage according to claim 3, characterized in that: The top of the third chamber (1f) is constrained by a guide seat (55) that can only move up and down. The guide seat (55) has a threaded hole (551). The upper end of the second spring (53) is held against the bottom of the guide seat (55). The adjusting cap (54) is constrained at the upper end of the valve body (1). The adjusting cap (54) has a threaded post (541) that extends downward and is threaded to the threaded hole (551). Rotating the adjusting cap (54) can drive the guide seat (55) to move up and down to realize the change of the compression of the second spring (53).

5. The multifunctional three-way valve for cranial drainage according to claim 3, characterized in that: A sealing ring (4) is embedded on the outer periphery of the second valve stem (51), and the sealing ring (4) forms a seal between the second valve stem (51) and the valve stem hole (2c).

6. The multifunctional three-way valve for cranial drainage according to claim 3, characterized in that: The upper end of the second valve stem (51) is fixed with a spring seat (56), which is located in the third chamber (1f), and the lower end of the second spring (53) rests on the spring seat (56).

7. The multifunctional three-way valve for craniocerebral drainage according to claim 1, characterized in that: The outer wall of the valve housing (1) has a first connector post (11), a second connector post (12) and a third connector post (13) protruding outward. The drug administration flushing channel (1c) passes through the first connector post (11), the first drainage channel (1d) passes through the second connector post (12), and the second drainage channel (1e) passes through the third connector post (13). The second connector post (12) is a standard Luer female connector or a male connector, and the third connector post (13) is a standard Luer female connector or a male connector.

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