A drainage control valve for a drainage tube

Abstract

The application provides a drainage control valve for a drainage tube, and belongs to the technical field of medical drainage devices. The valve mainly comprises a valve body and a flexible outer capsule body wrapped outside the valve body. The valve body is respectively provided with A and B end flow channels at both ends, and is connected with an anti-reflux cavity and a gas pressure cavity in the middle. A plurality of through grooves are formed in the top wall of the anti-reflux cavity, and an arc-shaped anti-reflux piece made of an elastic material is suspended below the through grooves through a connecting column. The outer capsule body forms a first gap with the top wall above the anti-reflux cavity, and a balloon is formed above the gas pressure cavity. The main effect of the valve is to realize efficient and reliable anti-reflux function. When the body fluid flows forward, the anti-reflux piece can be pushed open to pass through the through grooves; when reverse flow occurs, the fluid pressure makes the anti-reflux piece tightly adhere to the top wall, effectively closes the through grooves, and blocks the backflow. At the same time, the reverse fluid can be intercepted in the anti-reflux cavity, avoiding the backflow into the patient's body to cause infection, and significantly improving the safety of use.

Description

Technical Field

[0001] This utility model relates to medical drainage devices, specifically to a drainage control valve for a drainage tube. Background Technology

[0002] Clinically, external ventricular drainage is a common neurosurgical procedure often used to treat conditions such as intraventricular hemorrhage, acute hydrocephalus, brain abscess, intracerebral hematoma, and chronic subdural hematoma. It primarily involves draining cerebrospinal fluid, blood clots, or hemorrhagic cerebrospinal fluid from the ventricles into an external drainage bag via a drainage tube. Currently, a standard external ventricular drainage device includes a drainage tube (usually a single-lumen or multi-lumen tube), a Luer connector at the rear end of the tube connecting to the drainage system, a drip bottle within the drainage system, and a collection bag at the end of the system to collect the drained cerebrospinal fluid and blood clots. Anti-reflux mechanisms are typically placed on the drip bottle or collection bag.

[0003] Conventional drainage devices of this type are prone to blockage when draining blood clots or bloody cerebrospinal fluid. If the drainage tube becomes blocked, it can obstruct fluid drainage, leading to fluid accumulation, pain, and an increased risk of infection; it can also reduce drainage effectiveness, affecting wound healing or recovery; and the drainage fluid may even flow back through the anti-reflux structure, causing complications such as infection. If the blockage cannot be reversed, the catheter must be replaced, increasing medical costs and potentially causing further harm to the patient.

[0004] Solving the problems of backflow and blockage in the drainage tube is a fundamental challenge in the production and use of drainage devices. Utility Model Content

[0005] This invention provides a drainage control valve for a drainage tube, which aims to solve the problems of existing drainage devices easily causing backflow of fluid back to the drainage location and easy blockage of the drainage device.

[0006] To achieve the above objectives, embodiments of this utility model provide a drainage control valve for a drainage tube, comprising: The valve body has an a-end flow channel and a b-end flow channel at both ends along its length. A pressure chamber and an anti-backflow chamber are also provided between the a-end flow channel and the b-end flow channel. The anti-backflow chamber is close to the a-end flow channel and is connected to the a-end flow channel. The pressure chamber is close to the b-end flow channel and is connected to the b-end flow channel. The anti-backflow cavity has a top wall with several through slots. An arc-shaped anti-backflow plate is installed inside the anti-backflow cavity. The center of the anti-backflow plate is recessed downwards. The anti-backflow plate is fixed to the lower surface of the top wall by a connecting column. The anti-backflow plate is made of elastic material. An outer bladder is used to wrap the valve body. The portion of the outer bladder above the anti-backflow cavity forms a first slit communicating with the pressure chamber between itself and the top wall. The portion of the outer bladder above the pressure chamber protrudes upward to form a spherical bladder. The outer bladder is made of a flexible material.

[0007] Preferably, the a-end flow channel includes a first a-end branch channel and a second a-end branch channel. The first a-end branch channel is connected to the anti-backflow cavity. A first control structure is connected between the first a-end branch channel and the second a-end branch channel. The first control structure is used to control the connection and disconnection between the first a-end branch channel and the second a-end branch channel.

[0008] Preferably, the first control structure includes a control cavity that penetrates the valve body along the thickness direction of the valve body, the first a-end branch channel is connected to the control cavity, a control ring is suspended in the control cavity, a control through hole is opened in the center of the control ring along the axial direction of the control ring, and the second a-end branch channel is connected to the control through hole in the radial direction of the control through hole; The outer capsule forms second slits on the upper and lower surfaces of the control ring, respectively.

[0009] Preferably, the outer capsule is recessed in the direction of the control ring at the control ring to form a positioning recess.

[0010] Preferably, the valve body is further provided with a second control structure near the b-end flow channel. The b-end flow channel and the air pressure chamber are connected through the second control structure, and the second control structure controls the opening and closing of the b-end flow channel and the air pressure chamber.

[0011] Preferably, the second control structure includes a control blind hole opened on the upper surface of the valve body, and the b-end flow channel communicates with the control blind hole in the radial direction of the control blind hole; The outer bladder forms a third slit between the control blind hole and the valve body, and the third slit communicates with the air pressure chamber.

[0012] Preferably, the bottom of the anti-backflow cavity is open, and the bottom of the anti-backflow cavity is detachably provided with an anti-backflow base plate; The outer bladder has a notch at the bottom of the anti-backflow cavity, the air pressure cavity, and the second control structure, and a silicone base plate is provided on the outer bladder for sealing the notch.

[0013] Preferably, a plurality of the through channels are located on the top wall near the flow channel at end a; The anti-backflow plate has a circular projection on the top plate, and several of the through slots are located within the projection of the anti-backflow plate.

[0014] Preferably, the valve body is made of rigid medical material, and the outer capsule is made of silicone material.

[0015] Preferably, a puncture-resistant plate is provided at the bottom of the air pressure chamber.

[0016] The above-described solution of this utility model has the following beneficial effects: In this application, an anti-backflow plate is used to react differently to the channel when the body fluid is flowing in the forward or reverse direction, thereby preventing the reverse flow of the body fluid. At the same time, the backflowing body fluid accumulates in the anti-backflow cavity, which can prevent the backflowing fluid from flowing back to the patient's wound and causing infection.

[0017] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is a schematic diagram of the valve body; Figure 3 This is a schematic diagram of the external capsule; Figure 4 This is a top view of the present invention; Figure 5 yes Figure 4 Schematic diagram of the cross section of the middle WW; Figure 6 yes Figure 5 Enlarged view of the S-section in forward flow; Figure 7 yes Figure 5 Enlarged view of section D in the forward flow condition; Figure 8 yes Figure 5 Enlarged view of the middle F section under normal flow; Figure 9 yes Figure 5 A schematic diagram of part D during backflow.

[0019] [Explanation of Labels in the Attached Image] 100-Valve body, 110-A-end flow channel, 111-First A-end branch flow channel, 112-Second A-end branch flow channel, 120-B-end flow channel, 130-Pressure chamber, 131-Anti-puncture plate, 140-Anti-backflow chamber, 141-Top wall, 142-Through groove, 143-Anti-backflow plate, 144-Connecting column, 145-Anti-backflow base plate, 150-First control structure, 151-Control cavity, 152-Control ring, 153-Control through hole, 154-Connector, 160-Second control structure, 161-Control blind hole, 170-A end connector, 180-B end connector; 200 - External capsule, 210 - First slit, 220 - Balloon, 230 - Second slit, 240 - Positioning depression, 250 - Third slit, 260 - Notch, 270 - Silicone base plate. Detailed Implementation

[0020] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0021] In this application, the direction in which body fluid can flow smoothly through the drainage control valve is defined as the forward flow direction, and the direction in which body fluid cannot flow through the drainage control valve is defined as the reverse flow direction.

[0022] like Figures 1-9 As shown, this application provides a drainage control valve for a drainage tube, including a valve body 100. The valve body 100 is made of a medical rigid material, such as PP, PC, or other hard plastics. The valve body 100 is generally elongated, with an a-end connector 170 and a b-end connector 180 formed at both ends along its length. An a-end flow channel 110 is provided in the a-end connector 170, and a b-end flow channel 120 is provided in the b-end connector 180. A pressure chamber 130 and an anti-backflow chamber 140 are also formed on the valve body 100. The pressure chamber 130 and the anti-backflow chamber 140 are interconnected and located between the a-end flow channel 110 and the b-end flow channel 120. The anti-backflow chamber 140 is close to and connected to the a-end flow channel 110, and the pressure chamber 130 is close to and connected to the b-end flow channel 120.

[0023] The aforementioned anti-backflow cavity 140 has a top wall 141, which can be integrally formed with the valve body 100, or it can be fabricated separately from the valve body 100 and then connected together using existing technology, such as heat fusion. Several through grooves 142 are formed on the top wall 141. An anti-backflow plate 143 is disposed within the anti-backflow cavity 140. The anti-backflow plate 143 is arc-shaped, and its center is concave downwards, meaning its center bulges away from the top plate. The anti-backflow plate 143 covers the through grooves 142. The anti-backflow plate 143 is fixed to the lower surface of the top wall 141 by a connecting post 144 and is made of an elastic material.

[0024] An outer bladder 200, made of flexible material, is also wrapped around the valve body 100. The outer bladder 200 is positioned around the valve body 100 along its length. The outer bladder 200 contacts the outer contour of the valve body 100. A first slit 210 is formed between the portion of the outer bladder 200 above the anti-backflow cavity 140 and the top wall 141, connecting the through groove 142 and the pressure chamber 130. The portion of the outer bladder 200 above the pressure chamber 130 protrudes upward to form a spherical bulb 220.

[0025] The inlet of the flow channel 110 on the side near the anti-backflow cavity 140 is lower than the anti-backflow plate 143.

[0026] In this application, body fluid can flow from end b channel 120 to end a channel 110 (i.e., flow in the forward flow direction). During use, it must be ensured that end b channel 120 is higher than end a channel 110. (Refer to...) Figure 7 The body fluid flows along the red flow direction through the b-end channel 120 into the pressure chamber 130, then through the first slit 210 and the through groove 142 into the anti-backflow chamber 140. Because the anti-backflow plate 143 covers the through groove 142, and the center of the anti-backflow plate 143 protrudes away from the top wall 141 (hereinafter referred to as the anti-backflow plate 143 protrusion), the body fluid will accumulate on the anti-backflow plate 143. The anti-backflow plate 143 is made of elastic material. As the body fluid accumulates, the edge of the anti-backflow plate 143 bends downward because it cannot bear the weight, and the body fluid enters the a-end channel 110.

[0027] Please continue to refer to Figure 7 As shown, since the b-end flow channel 120 is higher than the a-end flow channel 110 during use, most of the body fluid is concentrated on the side of the anti-backflow plate 143 near the a-end flow channel 110. At this time, this part of the body fluid flows directly along the a-end flow channel 110. When the body fluid flow rate is large, a small part of the body fluid is also concentrated on the side of the anti-backflow plate 143 near the b-end flow channel 120. This part of the body fluid also causes the anti-backflow plate 143 to deform downward, and the body fluid enters the anti-backflow cavity 140 and is located below the anti-backflow plate 143. Under the overall tilting trend of the drainage control valve, a small amount of body fluid flows to the side of the anti-backflow cavity 140 near the a-end flow channel 110 and mixes with another part of the body fluid (i.e., most of the body fluid that directly flows into the a-end flow channel 110) and flows into the a-end flow channel 110.

[0028] When backflow exists, the backflowing fluid cannot flow from end a channel 110 to end b channel 120 (i.e., it cannot flow in the backflow direction). For example... Figure 9As shown, when the backflow fluid enters the anti-backflow cavity 140 from the flow channel 110 at end a along the red flow path, it will exert a force on the anti-backflow plate 143 in the direction of the top wall 141. Under the action of this force, the anti-backflow plate 143 will adhere to the top wall 141 to block the through groove 142. Therefore, when there is backflow fluid, under the action of the anti-backflow plate 143, the backflow fluid cannot pass through the anti-backflow cavity 140.

[0029] In this embodiment, the cross-section of the anti-backflow cavity 140 is circular, and correspondingly, the cross-section of the anti-backflow plate 143 is also circular. The projection of the anti-backflow plate 143 on the top wall 141 coincides with or is slightly larger than the projection of the anti-backflow cavity 140 on the top wall 141.

[0030] Preferably, a plurality of through slots 142 are arranged on the side of the top wall 141 near the flow channel 110 at end a. The through slots 142 on the top wall 141 are located within the range of the anti-backflow plate 143 projected onto the top wall 141, so as to ensure that the anti-backflow plate 143 can cover all the through slots 142 when subjected to an upward force.

[0031] This application not only has the effect of preventing backflow, but also has the effect of clearing the drainage pipe and / or the drainage control valve. In use, the flow channel 110 at end a and the flow channel 120 at end b can be connected to the drainage pipe respectively.

[0032] Specifically, the a-end flow channel 110 includes a first a-end branch channel 111 and a second a-end branch channel 112. The first a-end branch channel 111 is close to and connected to the anti-backflow cavity 140. A first control structure 150 connects the first a-end branch channel 111 and the second a-end branch channel 112, and the first control structure 150 is used to control the opening and closing of the first a-end branch channel 111 and the second a-end branch channel 112. The end of the second a-end branch channel 112 away from the first a-end branch channel 111 can be connected to a drainage tube or sealed with a plug. Body fluid sequentially passes through the pneumatic chamber 130 and enters the first a-end branch channel 111, the first control structure 150, and the second a-end branch channel 112.

[0033] The valve body 100 is further provided with a second control structure 160 near the b-end flow channel 120. The b-end flow channel 120 and the pressure chamber 130 are connected through the second control structure 160, which controls the opening and closing of the connection between the b-end flow channel 120 and the pressure chamber 130. Body fluid passes sequentially through the b-end flow channel 120, the second control structure 160, and the pressure chamber 130.

[0034] The method for unblocking the drainage pipe and / or drainage control valve in this application is as follows: When a blockage occurs, the first control structure 150 cuts off the connection between the first a-end branch channel 111 and the second a-end branch channel 112. Pressing the balloon 220, if the balloon 220 can rebound, it indicates that the blockage is in the direction of the a-end channel 110; if the balloon 220 fails to rebound, it indicates that the blockage is in the direction of the b-end channel 120.

[0035] In the event of blockage in flow channel 110 at end a, to restore the connection between the first branch flow channel 111 at end a and the second branch flow channel 112 at end a, the second control structure 160 cuts off the connection between the pressure chamber 130 and the flow channel 120 at end b. By continuously pressing the balloon 220, the blockage of the pressure chamber 130, the first control structure 150, the flow channel 110 at end a, and the drainage tube connected to the flow channel 110 at end a can be alleviated or resolved.

[0036] Reference Figure 6 As shown, the aforementioned first control structure 150 includes a control cavity 151, which is located on the connection path between the first a-end branch channel 111 and the second a-end branch channel 112. The control cavity 151 is formed on the valve body 100 and penetrates the valve body 100 along the thickness direction. The end of the first a-end branch channel 111 is connected to the control cavity 151. A control ring 152 is suspended inside the control cavity 151 and is fixed inside the control cavity 151 by a connector 154. A control through hole 153 is opened at the center of the control ring 152 and penetrates the control ring 152 along the thickness direction of the valve body 100. The inlet of the second a-end branch channel 112 is connected to the control through hole 153 in the radial direction of the control through hole 153.

[0037] The portion of the outer capsule 200 above the control ring 152 forms a second slit 230 with the upper surface of the control ring 152. Similarly, the portion of the outer capsule 200 below the control ring 152 forms another second slit 230 with the lower surface of the control ring 152.

[0038] When it is necessary to use the first control structure 150 to disconnect the first a-end branch channel 111 and the second a-end branch channel 112, pinch the outer capsule 200 above and below the control ring 152 with your hands respectively. The outer capsule 200 contacts the control ring 152, blocking the flow of body fluid from the first a-end branch channel 111 into the second a-end branch channel 112 through the control through hole 153.

[0039] The outer capsule 200 is recessed towards the control ring 152 to form a positioning recess 240, which facilitates the user to quickly position themselves to the control ring 152. At the same time, by presetting the depth of the positioning recess 240, the height of the two second slits 230 can be changed, thereby adjusting the flow rate of body fluid.

[0040] Reference Figure 8 As shown, the aforementioned second control structure 160 is disposed on the valve body 100 near the b-end flow channel 120. The end of the b-end flow channel 120 communicates with the second control structure 160, and the pressure chamber 130 also communicates with the second control structure 160. The second control structure 160 includes a control blind hole 161 formed on the upper surface of the valve body 100. The control blind hole 161 is formed along the thickness direction of the valve body 100 on the upper surface of the valve body 100, and the end of the b-end flow channel 120 communicates with the control blind hole 161 along the radial direction of the control blind hole 161. The outer bladder 200 forms a third slit 250 above the control blind hole 161 and the valve body 100, and the third slit 250 communicates the control blind hole 161 and the pressure chamber 130.

[0041] Understandably, the first slit 210, the second slit 230, and the third slit 250 can all form corresponding slits with the outer capsule 200 by reducing the thickness of the valve body 100 at the corresponding positions.

[0042] When it is necessary to disconnect the flow channel 120 at end b and the pressure chamber 130 using the second control structure 160, the outer capsule 200 above the control blind hole 161 can be pinched to prevent body fluid from flowing from the flow channel 120 at end b into the pressure chamber 130. Understandably, by adjusting the thickness of the valve body 100 at the control blind hole 161, the thickness of the third slit 250 can be changed, and the flow rate of the body fluid can also be adjusted.

[0043] Preferably, the outer capsule 200 is further provided with a marker point at the control blind hole 161 for locating the position of the control blind hole 161.

[0044] The bottom of the aforementioned anti-backflow cavity 140 is designed to be open, which facilitates the fixing of the anti-backflow plate 143 and the connecting column 144 to the top wall 141. An anti-backflow base plate 145 is provided at the bottom of the anti-backflow cavity 140. The anti-backflow base plate 145 and the opening of the anti-backflow cavity 140 are detachably connected, such as by screws. During assembly, a sealing element, such as a sealing gasket, can be added between the anti-backflow base plate 145 and the opening.

[0045] Reference Figure 3 As shown, the outer bladder 200 has notches 260 at the bottom of the anti-backflow cavity 140, the air pressure cavity 130 and the second control structure 160, so as to facilitate the assembly of the valve body 100 into the outer bladder 200.

[0046] Preferably, a silicone base plate 270 is also provided on the outer capsule 200. The silicone base plate 270 is used to seal the aforementioned notch 260, thereby protecting the valve body 100 and preventing leakage of bodily fluids. In this embodiment, the silicone base plate 270 is bonded to the notch 260 of the outer capsule 200.

[0047] In this application, the outer capsule 200 is made of silicone material.

[0048] Preferably, a puncture-resistant piece 131 is provided at the bottom of the air pressure chamber 130.

[0049] The advantages of this application are: First, the drainage control valve of this application has an anti-reflux chamber 140 to ensure unidirectional flow of body fluid. At the same time, under the action of the anti-reflux chamber 140, the refluxed body fluid is stopped at the a-end flow channel 110 side of the anti-reflux chamber 140, avoiding contact between the refluxed body fluid and the patient, and greatly reducing the risk of infection for the patient.

[0050] Second, this application can clear blockages on one side of the a-end flow channel 110, avoiding damage to the patient caused by replacing the drainage tube or drainage control valve.

[0051] Third, the outer capsule 200 of this application is made of silicone material, which has a certain degree of resilience and can collect body fluid samples or inject drugs by puncturing into the air pressure chamber 130 at the position of the balloon 220.

[0052] Fourth, the end of the flow channel 110 can be connected to a drainage tube or a plug, making it suitable for a variety of different scenarios.

[0053] Fifth, the flow rate of body fluid within the drainage control valve is adjustable. The gap of the first slit 210 can be adjusted by pressing or by loosening the scalp during suturing, thereby changing the flow rate.

Claims

1. A drainage control valve for a drainage tube, characterized in that, include: The valve body (100) has an a-end flow channel (110) and a b-end flow channel (120) formed at both ends along its length. A pressure chamber (130) and an anti-backflow chamber (140) are also provided between the a-end flow channel (110) and the b-end flow channel (120). The anti-backflow chamber (140) is close to the a-end flow channel (110) and connected to the a-end flow channel (110). The pressure chamber (130) is close to the b-end flow channel (120) and connected to the b-end flow channel (120). The anti-backflow cavity (140) has a top wall (141) with several through slots (142) on it. An arc-shaped anti-backflow plate (143) is provided inside the anti-backflow cavity (140). The center of the anti-backflow plate (143) is recessed downwards. The anti-backflow plate (143) is fixed to the lower surface of the top wall (141) by a connecting post (144). The anti-backflow plate (143) is made of elastic material. An outer bladder (200) is used to wrap the valve body (100). The portion of the outer bladder (200) above the anti-backflow cavity (140) forms a first slit (210) communicating with the pressure cavity (130) between the top wall (141) and the outer bladder (200). The portion of the outer bladder (200) above the pressure cavity (130) protrudes upward to form a balloon (220). The outer bladder (200) is made of a flexible material.

2. The drainage control valve for a drainage tube according to claim 1, characterized in that: The a-end flow channel (110) includes a first a-end branch channel (111) and a second a-end branch channel (112). The first a-end branch channel (111) is connected to the anti-backflow cavity (140). A first control structure (150) is connected between the first a-end branch channel (111) and the second a-end branch channel (112). The first control structure (150) is used to control the connection and disconnection between the first a-end branch channel (111) and the second a-end branch channel (112).

3. The drainage control valve for a drainage tube according to claim 2, characterized in that: The first control structure (150) includes a control cavity (151) that penetrates the valve body (100) along the thickness direction of the valve body (100). The first a-end branch channel (111) is connected to the control cavity (151). A control ring (152) is suspended in the control cavity (151). A control through hole (153) is opened in the center of the control ring (152) and penetrates along the axial direction of the control ring (152). The second a-end branch channel (112) is connected to the control through hole (153) in the radial direction of the control through hole (153). The outer capsule (200) forms a second slit (230) on the upper and lower surfaces of the control ring (152) respectively.

4. The drainage control valve for a drainage tube according to claim 3, characterized in that: The outer capsule (200) is recessed in the direction of the control ring (152) to form a positioning recess (240).

5. The drainage control valve for a drainage tube according to claim 2, characterized in that: The valve body (100) is also provided with a second control structure (160) near the b-end flow channel (120). The b-end flow channel (120) and the air pressure chamber (130) are connected through the second control structure (160). The second control structure (160) controls the opening and closing of the b-end flow channel (120) and the air pressure chamber (130).

6. The drainage control valve for a drainage tube according to claim 5, characterized in that: The second control structure (160) includes a control blind hole (161) opened on the upper surface of the valve body (100), and the b-end flow channel (120) communicates with the control blind hole (161) in the radial direction of the control blind hole (161); The outer capsule (200) forms a third slit (250) above the control blind hole (161) and between it and the valve body (100), the third slit (250) communicating with the air pressure chamber (130).

7. The drainage control valve for a drainage tube according to claim 6, characterized in that: The bottom of the anti-backflow cavity (140) is open, and the bottom of the anti-backflow cavity (140) is detachably provided with an anti-backflow base plate (145). The outer capsule (200) has a notch (260) at the bottom of the anti-backflow cavity (140), the air pressure cavity (130) and the second control structure (160), and a silicone base plate (270) is provided on the outer capsule (200) for sealing the notch (260).

8. The drainage control valve for a drainage tube according to claim 1, characterized in that: Several of the aforementioned channels (142) are located on the top wall (141) near the a-end flow channel (110); The anti-backflow plate (143) is projected onto the top plate in a circular shape, and several of the through slots (142) are located within the projection of the anti-backflow plate (143).

9. The drainage control valve for a drainage tube according to claim 1, characterized in that: The valve body (100) is made of rigid medical material, and the outer capsule (200) is made of silicone material.

10. The drainage control valve for a drainage tube according to claim 1, characterized in that, A puncture-resistant plate (131) is provided at the bottom of the air pressure chamber (130).

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