External ventricular drainage device

Abstract

The external ventricular drainage device comprises a puncture needle, a drainage tube, a drainage bag and an adjusting valve, the adjusting valve comprises a valve body, an intercepting piece, a rotary driving structure and an angle reduction structure, the valve body is a cylindrical hollow body, and a liquid inlet tube and a liquid outlet tube are arranged at the two ends of the valve body respectively; the plurality of intercepting sheets are arranged in the channel of the valve body at intervals in the circumferential direction, and the intercepting sheets can rotate in a plane perpendicular to the central axis of the valve body; the rotary driving structure is connected with all the intercepting pieces through the angle reducing structure, the angle reducing structure reduces the rotation angle output by the rotary driving structure and then conveys the rotation angle to a rotating shaft of the intercepting pieces so as to drive all the intercepting pieces to rotate, the adjacent intercepting pieces are separated or closed, and when all the intercepting pieces are in the closed state, the adjacent intercepting pieces are separated or closed. The channel of the valve body is closed. According to the external ventricular drainage device, the drainage speed can be accurately adjusted, and therefore quantitative drainage is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of drainage devices, and particularly to an external ventricular drainage device. Background Art

[0002] External ventricular drainage (EVD) is one of the most commonly used treatment operations in neurosurgery. It refers to draining the blood and fluid in the cerebral ventricle to the outside of the brain to reduce intracranial pressure (ICP) and clear bloody or infected cerebrospinal fluid, etc., and is widely used in the drainage of intraventricular hemorrhage and hydrocephalus.

[0003] During the drainage process, the amount of cerebrospinal fluid drained per day should usually not exceed 500 ml, because the amount of cerebrospinal fluid secreted by normal people per day is about 500 ml. However, for treatment needs, it should be controlled at about 200 ml, and the average drainage speed is less than 15 - 20 ml / h. The specific drainage speed will depend on the patient's condition.

[0004] During the drainage process, excessive drainage may cause adverse consequences, such as rebleeding, low intracranial pressure syndrome, etc. The external ventricular drainage device generally includes a puncture needle, a drainage tube, a flow regulator, and a drainage bag. During the drainage process, the existing drainage valve is used to adjust the drainage speed.

[0005] However, the adjustment range of the existing drainage valve is not sensitive enough, and it is difficult to achieve fine adjustment. During use, accurate adjustment can be achieved for relatively small flow rate adjustments. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the technical problem to be solved by the present invention is to provide an external ventricular drainage device that can accurately adjust the drainage speed to achieve quantitative drainage.

[0007] To achieve the above object, the present invention is realized by the following technical solutions: An external ventricular drainage device includes a puncture needle, a drainage tube, a drainage bag, and a regulating valve. The regulating valve includes: A valve body, which is a cylindrical hollow body, and a liquid inlet pipe and a liquid outlet pipe are respectively arranged at both ends of the valve body; A plurality of intercepting pieces, which are circumferentially spaced and arranged in the channel of the valve body, and the intercepting pieces can rotate in a plane perpendicular to the central axis of the valve body; A rotation driving structure; and Angle reduction structure, the rotation drive structure is connected to all the shut-off pieces through the angle reduction structure, and the angle reduction structure reduces the rotation angle output by the rotation drive structure and then conveys it to the rotation shaft of the shut-off piece to drive all the shut-off pieces to rotate, so that adjacent shut-off pieces are separated or closed. When all the shut-off pieces are in the closed state, the passage of the valve body is closed.

[0008] Further, the rotation drive structure includes a mounting shaft, a rotation drive source, a rotating sleeve, a first slide rod and a pulling rod. The mounting shaft is coaxial with the valve body. One end of the rotation shaft of each shut-off piece is rotatably connected to the mounting shaft, and the other end is connected to the valve body. The rotating sleeve is rotatably sleeved outside the valve body. A plurality of first slide rods are circumferentially spaced on the outer periphery of the rotating sleeve. The rotation shaft of each shut-off piece is hinged to the pulling rod through an angle reduction structure. The pulling rod is provided with a first chute extending along its length direction. The first slide rod is slidably inserted into the first chute. When the rotating sleeve rotates, the pulling rod can be driven to swing through the first slide rod, and the pulling rod drives the rotation shaft of the shut-off piece to rotate through the angle reduction structure.

[0009] Further, the rotation drive source includes a handle, and the handle is fixedly arranged on the rotating sleeve.

[0010] Further, the angle reduction structure includes a rotation drive rod, a second slide rod, a slider and an auxiliary swing rod. The pulling rod is provided with a second chute extending along its length direction, and the second chute is located near the hinged end of the pulling rod. One end of the rotation drive rod is fixed to the mounting shaft, and the other end is fixed with the second slide rod, and the second slide rod is slidably inserted into the second chute. The slider is slidably sleeved on the rotation drive rod. One end of the auxiliary swing rod is hinged to the valve body, and the other end is hinged to the slider, and the length of the auxiliary swing rod is less than the length of the rotation drive rod.

[0011] Further, a locking assembly is further included, and the locking assembly is arranged between the rotating sleeve and the valve body and can lock and fix the rotating sleeve and the valve body.

[0012] Further, the locking assembly includes a screw and a pressure plate. The screw is threadedly connected to the rotating sleeve, and the pressure plate is arranged on the screw. Rotating the screw can drive the pressure plate to press against the outer wall of the valve body.

[0013] Further, a sealing gasket is arranged between the contact surfaces of adjacent shut-off pieces.

[0014] Further, an angle value is arranged on the outer wall of the valve body, and a pointer pointing to the angle value is arranged on the handle.

[0015] Further, it further includes an automatic zeroing component, which is connected to the rotating shaft and is used to drive the rotating shaft to rotate reversely for automatic zeroing.

[0016] Further, the automatic zeroing component includes a spiral spring piece. One spiral spring piece is sleeved on each rotating shaft. The inner end of the spiral spring piece is fixed to the rotating shaft, and the outer end is fixed to the valve body. The spiral spring piece stores energy when the rotating shaft rotates and drives the rotating shaft to rotate reversely and reset when released.

[0017] Advantages of the present invention: In the above-mentioned external ventricular drainage device, when in use, with the interception piece in the closed state, the liquid inlet pipe is connected to the drainage pipe, and the liquid outlet pipe is connected to the drainage bag. Subsequently, the interception piece is driven to open by the rotation driving structure. During the opening process, the angle reduction structure reduces the angle of the rotation driving structure and then transmits it to the interception piece, so that the rotation angle of the interception piece is greatly reduced, achieving the purpose of precise adjustment.

[0018] By adopting the above-mentioned drainage device, during the drainage process, the flow rate can be precisely adjusted through the regulating valve, so as to achieve the purpose of controlling the drainage speed and the single-day drainage volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for the specific embodiments will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn according to the actual ratio.

[0020] Figure 1 Schematic diagram of an external ventricular drainage device provided by an embodiment of the present invention; Figure 2 For Figure 1 Internal schematic diagram of the external ventricular drainage device shown; Figure 3 For Figure 1 Schematic diagram at position A in Figure 4 For Figure 1 Schematic diagram at position B in Figure 5 For Figure 1 Schematic diagram of the automatic zeroing component in the external ventricular drainage device shown; Reference numerals: 100, valve body; 200, throttle piece; 210, rotating shaft; 300, rotation driving structure; 310, mounting shaft; 320, rotation driving source; 330, rotating sleeve; 340, first slide bar; 350, pulling rod; 400, angle reduction structure; 410, rotation driving rod; 420, second slide bar; 430, slider; 440, auxiliary swing rod; 500, locking assembly; 510, screw; 520, pressure plate; 600, automatic zeroing assembly. Detailed implementation mode

[0021] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the specific implementation mode of the present invention in detail with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0022] Please refer to Figures 1 to 5 , the present invention provides an external ventricular drainage device, including a puncture needle, a drainage tube, a drainage bag and a regulating valve. The regulating valve includes a valve body 100, a throttle piece 200, a rotation driving structure 300 and an angle reduction structure 400.

[0023] Specifically, the valve body 100 is a cylindrical hollow body, and a liquid inlet pipe and a liquid outlet pipe are respectively arranged at both ends of the valve body 100. There are multiple throttle pieces 200, and the multiple throttle pieces 200 are circumferentially spaced and arranged in the channel of the valve body 100. The throttle piece 200 can rotate in a plane perpendicular to the central axis of the valve body 100.

[0024] The rotation driving structure 300 is connected to all the throttle pieces 200 through the angle reduction structure 400. The angle reduction structure 400 reduces the rotation angle output by the rotation driving structure 300 and then conveys it to the rotating shaft 210 of the throttle piece 200 to drive all the throttle pieces 200 to rotate, so that the adjacent throttle pieces 200 are separated or closed. When all the throttle pieces 200 are in the closed state, the channel of the valve body 100 is closed.

[0025] During use, when the throttle piece 200 is in the closed state, the liquid inlet pipe is connected to the drainage tube, and the liquid outlet pipe is connected to the drainage bag. Subsequently, the throttle piece 200 is driven to open through the rotation driving structure 300. During the opening process, the angle reduction structure 400 reduces the angle of the rotation driving structure 300 and then transmits it to the throttle piece 200, so that the rotation angle of the throttle piece 200 is greatly reduced, achieving the purpose of precise adjustment.

[0026] By adopting the above drainage device, during the drainage process, the flow rate can be precisely adjusted through the regulating valve, so as to achieve the purpose of controllable drainage speed and single-day drainage volume.

[0027] In this embodiment, the rotation driving structure includes a mounting shaft 310, a rotation driving source 320, a rotating sleeve 330, a first sliding rod 340, and a pulling rod 350. The mounting shaft 310 is coaxial with the valve body 100. One end of the rotation shaft 210 of each throttle piece 200 is rotatably connected to the mounting shaft 310, and the other end is connected to the valve body 100. The rotating sleeve 330 is rotatably sleeved outside the valve body 100. A plurality of first sliding rods 340 are circumferentially spaced on the outer periphery of the rotating sleeve 330. The rotation shaft 210 of each throttle piece 200 is hinged to the pulling rod 350 through an angle reduction structure 400. The pulling rod 350 is provided with a first chute extending along its length direction. The first sliding rod 340 is slidably inserted into the first chute. When the rotating sleeve 330 rotates, the pulling rod 350 can be driven to swing through the first sliding rod 340, and the pulling rod 350 drives the rotation shaft 210 of the throttle piece 200 to rotate through the angle reduction structure 400.

[0028] In this embodiment, the rotation driving source 320 includes a handle, and the handle is fixedly arranged on the rotating sleeve 330.

[0029] During use, by rotating the handle, the rotating sleeve 330 can be driven to rotate. When the rotating sleeve 330 rotates clockwise, it drives the pulling rod to swing clockwise, driving the throttle piece 200 to close. On the contrary, when the rotating sleeve 330 rotates counterclockwise, the throttle piece 200 can be driven to open.

[0030] In this embodiment, the angle reduction structure 400 includes a rotation driving rod 410, a second sliding rod 420, a slider 430, and an auxiliary swing rod 440. The pulling rod 350 is provided with a second chute extending along its length direction, and the second chute is located near the hinged end of the pulling rod 350. One end of the rotation driving rod 410 is fixed to the mounting shaft 310, and the other end is fixed with the second sliding rod 420, and the second sliding rod 420 is slidably inserted into the second chute. The slider 430 is slidably sleeved on the rotation driving rod 410. One end of the auxiliary swing rod 440 is hinged to the valve body 100, and the other end is hinged to the slider 430, and the length of the auxiliary swing rod 440 is less than the length of the rotation driving rod 410.

[0031] During use, when the rotating sleeve 330 rotates, it drives the first sliding rod 340 to rotate. The first sliding rod 340 drives the pulling rod 350 to swing. When the pulling rod 350 swings, it drives the rotation driving rod 410 to swing through the second sliding rod 420. Under the action of the auxiliary swing rod 440, the rotation driving rod 410 swings left and right around the rotation shaft 210. While swinging, it drives the rotation shaft 210 to rotate, thereby realizing the opening and closing actions of the throttle piece 200.

[0032] As a preferred embodiment, the device further includes a locking assembly 500 disposed between the rotating sleeve 330 and the valve body 100, which can lock and fix the rotating sleeve 330 and the valve body 100 to prevent the rotating sleeve 330 from rotating arbitrarily.

[0033] Specifically, the locking assembly 500 includes a screw rod 510 and a pressure plate 520. The screw rod 510 is threadedly connected to the rotating sleeve 330. The pressure plate 520 is disposed on the screw rod 510. Rotating the screw rod 510 can drive the pressure plate 520 to press against the outer wall of the valve body 100, thereby preventing the rotating sleeve 330 from rotating. Of course, in other embodiments, the locking assembly 500 can also be in other forms, such as a gear assembly.

[0034] As another preferred embodiment, the device further includes an automatic zeroing assembly 600 connected to the rotating shaft 210 for driving the rotating shaft 210 to rotate in the reverse direction to automatically zero.

[0035] Specifically, the automatic zeroing assembly 600 includes a helical spring piece. A helical spring piece is sleeved on each rotating shaft 210. The inner end of the helical spring piece is fixed to the rotating shaft 210, and the outer end is fixed to the valve body 100. The helical spring piece stores energy when the rotating shaft 210 rotates and drives the rotating shaft 210 to rotate in the reverse direction to reset and automatically zero when released.

[0036] In specific implementation, to improve the sealing performance, a gasket can be provided between the contact surfaces of adjacent intercepting pieces 200. In addition, an angular value can be provided on the outer wall of the valve body 100, and a pointer pointing to the angular value can be provided on the handle to improve the accuracy of adjustment.

[0037] By using the above-mentioned external ventricular drainage device, the adjustment of the drainage flow rate can be completed quickly and accurately, achieving accurate and controllable drainage.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. An external ventricular drainage device, comprising a puncture needle, a drainage tube, a drainage bag and a regulating valve, characterized in that, The regulating valve includes: A valve body, which is a cylindrical hollow body, and a liquid inlet pipe and a liquid outlet pipe are respectively arranged at both ends of the valve body; Throttling pieces, there are multiple throttling pieces, and the multiple throttling pieces are circumferentially spaced and arranged in the channel of the valve body, and the throttling pieces can rotate in a plane perpendicular to the central axis of the valve body; A rotation driving structure; and An angle reduction structure, the rotation driving structure is connected to all the throttling pieces through the angle reduction structure, and the angle reduction structure reduces the rotation angle output by the rotation driving structure and then conveys it to the rotation shaft of the throttling piece to drive all the throttling pieces to rotate, so that adjacent throttling pieces are separated or closed. When all the throttling pieces are in the closed state, the channel of the valve body is closed.

2. The external ventricular drainage device according to claim 1, characterized in that The rotation driving structure includes a mounting shaft, a rotation driving source, a rotating sleeve, a first sliding rod and a pulling rod. The mounting shaft is coaxial with the valve body. One end of the rotation shaft of each throttling piece is rotatably connected to the mounting shaft, and the other end is connected to the valve body. The rotating sleeve is rotatably sleeved outside the valve body. A plurality of first sliding rods are circumferentially spaced on the outer periphery of the rotating sleeve. The rotation shaft of each throttling piece is hinged to the pulling rod through an angle reduction structure. The pulling rod is provided with a first sliding groove extending along its length direction, and the first sliding rod is slidably inserted into the first sliding groove. When the rotating sleeve rotates, it can drive the pulling rod to swing through the first sliding rod, and the pulling rod drives the rotation shaft of the throttling piece to rotate through the angle reduction structure.

3. The external ventricular drainage device according to claim 2, characterized in that, The rotation driving source includes a handle, and the handle is fixedly arranged on the rotating sleeve.

4. The external ventricular drainage device according to claim 2, wherein The angle reduction structure includes a rotation driving rod, a second sliding rod, a slider and an auxiliary swing rod. The pulling rod is provided with a second sliding groove extending along its length direction, and the second sliding groove is located near the hinged end of the pulling rod. One end of the rotation driving rod is fixed to the mounting shaft, and the other end is fixed with the second sliding rod, and the second sliding rod is slidably inserted into the second sliding groove. The slider is slidably sleeved on the rotation driving rod. One end of the auxiliary swing rod is hinged to the valve body, and the other end is hinged to the slider, and the length of the auxiliary swing rod is less than the length of the rotation driving rod.

5. The external ventricular drainage device according to claim 2, wherein It further includes a locking assembly, and the locking assembly is arranged between the rotating sleeve and the valve body and can lock and fix the rotating sleeve and the valve body.

6. The external ventricular drainage device according to claim 5, characterized in that, The locking assembly includes a screw rod and a pressing disc. The screw rod is threadedly connected to the rotating sleeve, and the pressing disc is arranged on the screw rod. Rotating the screw rod can drive the pressing disc to press against the outer wall of the valve body.

7. The external ventricular drainage device according to claim 1, characterized in that, A sealing gasket is arranged between the contact surfaces of adjacent throttling pieces.

8. The external ventricular drainage device according to claim 3, wherein, An angle value is arranged on the outer wall of the valve body, and a pointer pointing to the angle value is arranged on the handle.

9. The external ventricular drainage device according to claim 2, wherein, It further includes an automatic zeroing assembly, and the automatic zeroing assembly is connected to the rotation shaft and is used to drive the rotation shaft to rotate reversely to automatically zero.

10. The external ventricular drainage device according to claim 9, characterized in that, The automatic zeroing component includes a spiral spring piece. One spiral spring piece is sleeved on each rotating shaft. The inner end of the spiral spring piece is fixed to the rotating shaft, and the outer end is fixed to the valve body. The spiral spring piece stores energy when the rotating shaft rotates and drives the rotating shaft to rotate reversely and reset when releasing energy.

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