Automatic adjusting cerebrospinal fluid drainage device

Abstract

The invention belongs to the technical field of medical instruments, and provides an automatic adjusting cerebrospinal fluid drainage device aiming at the problems that in traditional ventricular hydrops treatment, a catheter is prone to being blocked, drainage amount regulation and control are rough, and injection medicine is prone to retrograde infection and the like, the automatic adjusting cerebrospinal fluid drainage device comprises a drainage tube, and a fixing mechanism is arranged at the end, close to the human body, of the drainage tube; the end, away from the human body, of the drainage tube is provided with the flow control mechanism and connected with the liquid collecting bag. A flow monitoring mechanism and a peristaltic pump are arranged on the drainage tube, and the flow monitoring mechanism is connected with the peristaltic pump. By means of the combined design of the peristaltic pump, the flow pump and the independent feedback catheter, the drainage tube can be prevented from falling off in the drainage process, the drainage speed and the drainage amount can be automatically controlled, and the situation that the drainage tube is blocked due to excessive drainage or insufficient drainage when the drainage speed is too high is avoided; therefore, the problems of high cranial pressure, even cerebral hernia, low cranial pressure headache, even intracranial hemorrhage and the like are prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an automatic regulating cerebrospinal fluid drainage device. Background Art

[0002] In clinical medicine, extracorporeal drainage of cerebrospinal fluid is a safe, effective and minimally invasive method for treating neurosurgical diseases such as hydrocephalus, ventricular hemorrhage, intracranial infection, subarachnoid hemorrhage, etc. There are generally two ways of extracorporeal drainage of cerebrospinal fluid: the first is lumbar cistern cerebrospinal fluid drainage, and the second is ventricular cerebrospinal fluid drainage. This device is suitable for the latter.

[0003] Extraventricular cerebrospinal fluid drainage refers to the placement of a drainage tube into the ventricles to continuously drain cerebrospinal fluid, which can not only reduce intracranial pressure and relieve symptoms of intracranial hypertension, but also promote the discharge of intraventricular blood accumulation and treat ventricular hemorrhage caused by hypertension, cerebrovascular disease or trauma. The total amount of cerebrospinal fluid in an adult is about 110-200mL, and the amount produced per day is about 450-500mL, which may change under pathological conditions such as inflammation. Therefore, the amount of drainage must be strictly controlled during extraventricular cerebrospinal fluid drainage to avoid excessive drainage leading to symptoms of low intracranial pressure, and even serious complications such as intracranial hemorrhage and subdural effusion, which endanger the patient's life. On the contrary, if the drainage volume is too small, it will not be able to discharge intraventricular blood accumulation and reduce intracranial pressure. If the tube is completely blocked, it may even cause a sudden increase in intracranial pressure and brain herniation, which is fatal.

[0004] The common method of controlling the drainage volume of extracorporeal drainage of cerebrospinal fluid is to adjust the drainage volume by manually adjusting the relative height of the drainage tube and drainage bag to the level of the patient's ventricle (external auditory canal). The basis is that when lying flat, straighten the head, and the ventricle and external auditory canal are basically aligned in the anatomical position; however, the relative height is difficult to accurately measure and control, especially when the patient's position changes or the head of the bed is raised. If the relative height is too large or too small, it is easy to cause too fast drainage or too little drainage (unsmooth or even blocked tube). In the existing cerebrospinal fluid drainage process, in order to control the appropriate drainage speed and drainage volume, medical staff need to constantly adjust the height of the drainage bag to keep the drainage speed of cerebrospinal fluid or hematoma in line with the needs of the disease, so as to achieve the purpose of controlling the drainage volume, thereby increasing the complexity and workload of medical staff's operation, and indirectly increasing the number of medical staff. Therefore, it is urgent to design an automatic cerebrospinal fluid drainage device that can automatically control the drainage speed and drainage volume. Summary of the invention

[0005] The object of the present invention is to overcome the deficiencies of the prior art and provide an automatic cerebrospinal fluid drainage device, which can monitor the situation inside the drainage tube according to a pressure sensor, automatically control the drainage speed and drainage volume during the cerebrospinal fluid drainage process, avoid the too fast cerebrospinal fluid drainage speed, resulting in a sharp drop in intracranial pressure and too little (unsmooth) cerebrospinal fluid drainage, or even the blockage of the tube leading to a sharp increase in intracranial pressure and then serious complication problems, and reduce the work burden of medical staff.

[0006] To achieve the above object, the technical solution adopted by the present invention is: An automatic cerebrospinal fluid drainage device includes a drainage tube. A fixing mechanism is arranged at one end of the drainage tube close to the human body, a flow control mechanism is arranged at the other end of the drainage tube far from the human body, and the other end of the drainage tube far from the human body is connected to a liquid collection bag; A flow monitoring mechanism and a peristaltic pump are arranged on the drainage tube, and the flow monitoring mechanism is connected to the peristaltic pump.

[0007] Preferably, the fixing mechanism includes a fixing ring, a gauze, two straps and a fixing unit. The gauze is arranged on the outer side of the fixing ring, the two straps are respectively connected to both sides of the gauze, the fixing unit is arranged inside the fixing ring, and the fixing unit is connected to the drainage tube.

[0008] Preferably, the fixing unit includes an annular airbag, an adjusting rod, two arc-shaped push plates, two sliders and two arc-shaped grooves. The two arc-shaped push plates are symmetrically arranged on the outer side surface of the annular airbag respectively, the two sliders are horizontally symmetrically arranged on the outer side surfaces of the corresponding arc-shaped push plates respectively, the two arc-shaped grooves are symmetrically opened on the inner wall of the fixing ring respectively, the two sliders are respectively slidably connected to the corresponding arc-shaped grooves, and the adjusting rod is arranged on the top of the annular airbag.

[0009] Preferably, the radian of each arc-shaped groove gradually increases along the length direction of the arc-shaped groove, and anti-slip strips are arranged on the inner side surface of the airbag.

[0010] Preferably, the flow control mechanism includes a sealing plug, a limiting groove, a buoyancy ball, a connecting cylinder, a sliding unit and a plurality of liquid outlet holes. The top of the connecting cylinder is connected to the outer side surface of the other end of the drainage tube far from the human body. The buoyancy ball is movably arranged inside the connecting cylinder. The plurality of liquid outlet holes are arranged on the outer side wall of the connecting cylinder. The sealing plug is arranged inside the connecting cylinder. The limiting groove is arranged at the bottom of the sealing plug. The sliding unit is respectively connected to the drainage tube and the sealing plug.

[0011] Preferably, the sliding unit includes two guide rods, two slide rails, two rollers, and two limiting holes. The two slide rails are symmetrically arranged on the inner side wall of the end of the drainage tube away from the human body. Each guide rod has an inverted L-shaped structure, and the vertical ends of the two guide rods are perpendicularly connected to the top of the sealing plug. The two rollers are respectively connected to the horizontal ends of the corresponding guide rods, and the two rollers are respectively slidably connected to the corresponding slide rails. The two limiting holes are respectively arranged on the inner side wall of the end of the drainage tube away from the human body, and each limiting hole communicates with the corresponding slide rail below on the same side.

[0012] Preferably, the flow rate monitoring mechanism includes a pressure sensor and a pressure display meter. The pressure sensor is arranged inside the drainage tube, the pressure display meter is arranged outside the drainage tube, and the pressure display meter is electrically connected to the pressure sensor. The pressure sensor is electrically connected to the peristaltic pump through a controller.

[0013] Preferably, an infusion mechanism is further arranged on the drainage tube. The infusion mechanism includes an infusion tube, a liquid outlet tube, and a one-way valve. The infusion tube is arranged outside the drainage tube, the liquid outlet tube is arranged inside the drainage tube, and one end of the infusion tube penetrates through the drainage tube and is connected to one end of the liquid outlet tube. The other end of the liquid outlet tube is flush with the end of the drainage tube close to the human body. The one-way valve is arranged at the other end of the liquid outlet tube.

[0014] Preferably, a collar is arranged at the inlet of the liquid collection bag. A bolt for adjusting the size of the collar is arranged on the collar, and volume scale lines are arranged on the liquid collection bag.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) Through the design of the fixing mechanism of the present invention, not only can the drainage tube be initially fixed to the patient's head through the gauze and the binding band, but also through the adjustment of the fixing unit, the outer wall of the drainage tube can be extruded by the airbag to further fix the drainage tube, avoiding the problem of the drainage tube falling off during the drainage process, and also avoiding the unnecessary pain brought to the patient by the existing method of fixing the drainage tube by sewing it on the patient's scalp; moreover, through the design of the fixing unit, it can be suitable for the fixing of drainage tubes with different diameters, increasing the scope of application; (2) Through the design of the flow rate monitoring mechanism of the present invention, not only can the pressure of the drainage fluid in the drainage tube be monitored in real time through the pressure sensor, and then the flow rate of the drainage fluid can be monitored, but also through the combined design of the pressure sensor and the peristaltic pump, when the pressure sensor detects that the pressure value in the drainage tube is too small, the peristaltic pump can be started to increase the pressure in the drainage tube, so that the flow rate of the drainage fluid in the drainage tube increases, and when the pressure sensor detects that the pressure value in the drainage tube reaches or exceeds the set target value, the peristaltic pump is closed to reduce the pressure in the drainage tube, so that the flow rate of the drainage fluid in the drainage tube decreases, thereby automatically controlling the drainage speed and the drainage volume in the drainage tube, reducing the workload of medical staff; (3) Through the design of the flow control mechanism, the present invention can automatically seal the drainage tube when the drainage volume reaches the set value, preventing further drainage and avoiding the problem of excessive drainage. (4) Through the design of the infusion mechanism, on the basis of drainage, when drug injection into the brain is required, the drug can be directly input into the patient's brain through the infusion tube and the liquid outlet tube, without occupying the drainage channel, without using a three-way joint, and without removing the drainage tube. This not only simplifies the operation but also avoids problems such as retrograde infection caused by injecting drugs through the drainage channel and tube detachment caused by loosening of the three-way joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the automatic cerebrospinal fluid drainage device provided by an embodiment of the present invention; Figure 2 is Figure 1 a partial enlarged schematic view of part A in Figure 3 It is a cross-sectional view of the automatic cerebrospinal fluid drainage device provided by an embodiment of the present invention; Figure 4 is Figure 3 a partial enlarged schematic view of part B in Figure 5 It is a schematic connection structure diagram of the drainage tube, flow control mechanism, flow monitoring mechanism, infusion mechanism and peristaltic pump in an embodiment of the present invention; Figure 6 It is a schematic structural diagram of the fixing mechanism in an embodiment of the present invention; Figure 7 It is a schematic connection structure diagram of the annular airbag, arc-shaped push plate and slider in an embodiment of the present invention; Figure 8 It is a schematic structural diagram of the sealing plug and guide rod in an embodiment of the present invention; Figure 9 It is a cross-sectional view of the connection between the fixing ring and the annular airbag and arc-shaped push plate in an embodiment of the present invention; Figure 10 It is a cross-sectional view of the connection between the connecting cylinder and the buoyancy ball in an embodiment of the present invention; Figure 11 It is a schematic connection structure diagram of the connecting cylinder, buoyancy ball, sealing plug and guide rod in an embodiment of the present invention; In the figure: 1, drainage tube; 2, fixing mechanism; 201, fixing ring; 202, gauze; 203, strap; 204, annular airbag; 205, adjusting rod; 206, arc-shaped push plate; 207, slider; 208, arc-shaped groove; 209, anti-slip strip; 3, flow control mechanism; 301, sealing plug; 302, limit groove; 303, buoyancy ball; 304, connecting cylinder; 305, liquid outlet hole; 306, guide rod; 307, slide rail; 308, roller; 309, limit hole; 4, flow monitoring mechanism; 401, pressure sensor; 402, pressure display meter; 5, peristaltic pump; 6, infusion mechanism; 601, infusion tube; 602, liquid outlet tube; 603, one-way valve; 7, liquid collection bag; 8, collar; 9, bolt. Detailed implementation mode

[0017] The following will combine the Figures 1 to 11 embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0018] As Figures 1 to 11 shown, the embodiment of the present invention provides an automatic cerebrospinal fluid drainage device, including a drainage tube 1. One end of the drainage tube 1 close to the human body is provided with a fixing mechanism 2. Specifically, the fixing mechanism 2 and the drainage tube 1 are designed to be detachably connected. One end of the drainage tube 1 far from the human body is provided with a flow control mechanism 3, and one end of the drainage tube 1 far from the human body is detachably connected to the liquid collection bag 7; a flow monitoring mechanism 4 and a peristaltic pump 5 are arranged on the drainage tube 1, and the flow monitoring mechanism 4 and the peristaltic pump 5 are connected. The material of the drainage tube 1 in the embodiment of the present invention is silicone, and the inner diameter of the drainage tube 1 is preferably 1.0 - 2.5 mm, and the outer diameter is preferably 2.0 - 4.0 mm. The use of silicone material for the drainage tube 1 can make the drainage tube 1 soft, have good compliance, be elastic and bendable, and can minimize tissue damage caused by operations such as placement, transcatheter treatment, and removal to the greatest extent. The material of the liquid collection bag 7 in this embodiment is soft plastic or hard plastic, similar to the material of a clinical drainage bag or urine collection bag.

[0019] In the embodiment of the present invention, the fixing mechanism 2 includes a fixing ring 201, a gauze 202, two straps 203 and a fixing unit. The gauze 202 is arranged on the outer side of the fixing ring 201. The two straps 203 are respectively connected to both sides of the gauze 203. The fixing unit is arranged inside the fixing ring 201, and the fixing unit is connected to the drainage tube 1. In the specific design, a through hole for the fixing ring 201 to pass through is formed in the middle of the gauze 202, the fixing ring 201 is fixedly arranged inside the through hole, one ends of the two straps 203 are respectively fixed to both ends of the gauze 202, and the strap 203 is specifically an elastic band. The fixing unit is rotatably arranged inside the fixing ring 201.

[0020] In the embodiment of the present invention, the fixing unit includes an annular airbag 204, an adjusting rod 205, two arc-shaped push plates 206, two sliders 207 and two arc-shaped grooves 208. The two arc-shaped push plates 206 are symmetrically arranged on the outer side surface of the annular airbag 204 respectively. The two sliders 207 are horizontally symmetrically arranged on the outer side surface of the corresponding arc-shaped push plate 206 respectively. The two arc-shaped grooves 208 are symmetrically formed on the inner wall of the fixing ring 201 respectively. The two sliders 207 are respectively slidably connected to the corresponding arc-shaped grooves 208. The adjusting rod 205 is arranged on the top of the annular airbag 204. The radian of each arc-shaped groove 208 gradually increases along the length direction of the arc-shaped groove 208, and an anti-slip strip 209 is arranged on the inner side surface of the annular airbag 204. In the specific design, the annular airbag 204 is inflated and expanded. Along the length direction of each arc-shaped groove 208, the groove width at each place is different, and the groove width gradually decreases. And the groove width at one end of the arc-shaped groove 208 close to the small-size groove width is the same, and the groove width here is smaller than the width of the slider 207. Through such a design, it can be ensured that when the slider 207 rotates to the small-size groove width, part of the slider 207 will protrude out of the arc-shaped groove 208, and then the annular airbag 207 will be squeezed towards the middle, and then the drainage tube 1 placed inside the annular airbag 204 will be squeezed, so as to realize the fixation of the drainage tube 1. In addition, through the design of the anti-slip strip 209, the friction force with the drainage tube 1 can be increased, the fixation effect on the drainage tube 1 can be improved, and the drainage tube 1 can be prevented from slipping off.

[0021] During specific use, the gauze 202 is placed on the patient's head. Specifically, the through hole in the middle of the annular airbag 204 is aligned with the head drainage hole of the patient. Then, the two straps 203 are respectively wound around from both sides of the patient synchronously. Then, the movable ends of the two straps 203 are tied together to fix the gauze 202 to the patient's head. Then, the drainage end of the drainage tube 1 is passed through the through hole in the middle of the annular airbag 204 and extends into the patient's cerebral ventricle through the head drainage hole of the patient. When the drainage tube 1 reaches an appropriate depth in the patient's cerebral ventricle (that is, the depth of the drainage tube 1 entering the patient's cerebral ventricle is 6-7 cm), the adjusting rod 205 is rotated to drive the annular airbag 204 and the arc-shaped push plate 206 to rotate synchronously, so that the slider 207 gradually rotates along the arc-shaped groove 208 from the side with a larger groove width to the side with a smaller groove width. During the rotation process, as the groove width gradually decreases, a part of the slider 207 gradually extends beyond the arc-shaped groove 208 and moves towards the middle, and then squeezes the annular airbag 204 inward through the arc-shaped push plate 206. The annular airbag 204 deforms and gives an extrusion force to the outer wall of the drainage tube 1. When the drainage tube 1 is fixed to the annular airbag 204, the rotation of the adjusting rod 205 is stopped, so as to realize the extrusion fixation between the annular airbag 204 and the drainage tube 1, avoid the drainage tube 1 moving randomly during the drainage process and separating from the patient's cerebral ventricle, which affects the drainage effect.

[0022] In the embodiment of the present invention, the flow control mechanism 3 includes a sealing plug 301, a limiting groove 302, a buoyancy ball 303, a connecting cylinder 304, a sliding unit and a plurality of liquid outlet holes 305. The top of the connecting cylinder 304 is connected to the outer side surface of the end of the drainage tube 1 far from the human body. The buoyancy ball 303 is movably arranged inside the connecting cylinder 304. The plurality of liquid outlet holes 305 are arranged on the outer side wall of the connecting cylinder 304. The sealing plug 301 is arranged inside the connecting cylinder 304. The limiting groove 302 is arranged at the bottom of the sealing plug 301. The sliding unit is respectively connected to the drainage tube 1 and the sealing plug 301. During specific design, a through hole that can communicate with the drainage tube 1 is opened at the top of the connecting cylinder 304, and the through hole is fixedly connected to the outer side surface of the drainage tube 1. The buoyancy ball 303 is placed inside the connecting cylinder 304. The plurality of liquid outlet holes 305 can make the drainage liquid entering the inside of the connecting cylinder 304 flow out into the liquid collection bag 7. The shape of the limiting groove 302 is specifically designed to be a shape that can match the shape of the top of the buoyancy ball, so that the buoyancy ball 303 can float smoothly into the limiting groove 302 to limit the buoyancy ball 303, so that the buoyancy ball 303 can move upward together with the sealing plug 301.

[0023] In the embodiment of the present invention, the sliding unit includes two guide rods 306, two slide rails 307, two rollers 308 and two limiting holes 309. The two slide rails 307 are symmetrically formed on the inner side wall of the end of the drainage tube 1 away from the human body. Each guide rod 306 has an inverted L-shaped structure, and the vertical ends of the two guide rods 306 are perpendicularly connected to the top of the sealing plug 301. The two rollers 308 are respectively connected to the horizontal ends of the corresponding guide rods 306, and the two rollers 308 are respectively slidably connected to the corresponding slide rails 307. The two limiting holes 309 are respectively formed on the inner side wall of the end of the drainage tube 1 away from the human body, and each limiting hole 309 communicates with the corresponding slide rail 307 below on the same side. Through such a design, when the drainage liquid in the liquid collection bag 7 gradually increases and the liquid level gradually rises, the buoyancy ball 303 will gradually move upward with the liquid level under the buoyancy of the drainage liquid. When the buoyancy ball 303 floats up and enters the limiting groove 302, it will give an upward thrust to the sealing plug 301, causing the sealing plug 301 to move upward, and then pushing the guide rod 306 upward. The roller 308 synchronously moves upward along the slide rail 307. When the roller 308 and the horizontal end of the guide rod 306 move upward into the limiting hole 309, they are blocked by the top of the limiting hole 309 and cannot rise any further. The sealing plug 301 and the buoyancy ball 303 move to the connection between the drainage tube 1 and the connecting cylinder 304, and the sealing plug 301 and the buoyancy ball 303 block the outlet end of the drainage tube 1, so that the drainage liquid can no longer flow out of the drainage tube 1, avoiding excessive drainage.

[0024] In the embodiment of the present invention, a collar 8 is provided at the inlet of the liquid collection bag 7, and a bolt 9 for adjusting the size of the collar 8 is provided on the collar 8. Volume scale lines are provided on the liquid collection bag 7. After the drainage tube 1 is placed in the liquid collection bag 7, the notch end of the collar 8 can be squeezed to adjust the tightness of the collar 8, so that the collar 8 is in close contact with the drainage tube 1. Then, by tightening the bolt 9, the collar 8 and the drainage tube 1 are fixed, that is, the fixation of the drainage tube 1 and the liquid collection bag 7 is realized.

[0025] During specific use, since the single drainage volume of cerebrospinal fluid is 300 - 400 ml, the outlet end of the drainage tube 1 and the flow control mechanism 3 are placed into the transparent liquid collection bag 7 through a collar, and the outlet end of the drainage tube 1 is aligned with the maximum drainage volume scale line on the liquid collection bag 7. Then, the notched end of the collar 8 is squeezed to adjust the tightness of the collar 8 so that the collar 8 is in close contact with the drainage tube 1. Then, the collar 8 and the drainage tube 1 are fixed by tightening the bolt 9. Then, drainage is carried out. When the drainage fluid enters the inside of the connecting cylinder 304 through the outlet end of the drainage tube 1 and flows out into the liquid collection bag 7 through the liquid outlet hole 305, as the drainage fluid in the liquid collection bag 7 gradually increases and the liquid level gradually rises, the buoyancy ball 303 will gradually move upward along with the liquid level under the buoyancy of the drainage fluid. When the buoyancy ball 303 floats up and enters the limit groove 302, it will give an upward thrust to the sealing plug 301, causing the sealing plug 301 to move upward, and then pushing the guide rod 306 upward. The roller 308 synchronously moves upward along the slide rail 307. When the horizontal ends of the roller 308 and the guide rod 306 move upward into the limit hole 309, they are blocked by the top of the limit hole 309 and cannot rise anymore. At this time, the sealing plug 301 and the buoyancy ball 303 move to the connection between the drainage tube 1 and the connecting cylinder 304, and the liquid level of the drainage fluid just reaches the maximum drainage volume scale line on the liquid collection bag 7. The sealing plug 301 and the buoyancy ball 303 block the outlet end of the drainage tube 1, preventing the drainage fluid from flowing out of the drainage tube 1 anymore and avoiding over-drainage.

[0026] In the embodiment of the present invention, the flow rate monitoring mechanism 4 includes a pressure sensor 401 and a pressure display meter 402. The pressure sensor 401 is arranged inside the drainage tube 1, the pressure display meter 402 is arranged outside the drainage tube 1, and the pressure display meter 402 is electrically connected to the pressure sensor 401. The pressure sensor 401 is electrically connected to the peristaltic pump 5 through a controller. The connection of the pressure sensor 401 and the peristaltic pump 5 to the controller in the embodiment of the present invention, and the automatic opening or closing of the peristaltic pump 5 through the pressure value detected by the pressure sensor 401 belong to the prior art, and the implementation principle thereof will not be elaborated here.

[0027] During the specific drainage process, the pressure sensor 401 monitors the pressure value in the drainage tube 1 in real time, converts the pressure value into an electrical signal, and sends it to the controller. The controller is internally set with a minimum pressure threshold and a maximum pressure threshold. When the pressure sensor 401 detects that the pressure value in the drainage tube 1 is too small and lower than the minimum pressure threshold set inside the controller, the controller controls the start of the peristaltic pump 5 to increase the pressure in the drainage tube 1, so that the flow rate of the drainage fluid in the drainage tube 1 increases. When the pressure sensor 401 detects that the pressure value in the drainage tube 1 is too high and reaches or exceeds the maximum pressure threshold set by the controller, the controller controls the peristaltic pump to close to reduce the pressure in the drainage tube 1, so that the flow rate of the drainage fluid in the drainage tube 1 decreases, thereby automatically controlling the drainage speed and the drainage volume in the drainage tube 1, so that the drainage speed can be controlled within a suitable speed range, avoiding the problems of too slow or too fast drainage speed.

[0028] In the embodiment of the present invention, an infusion mechanism 6 is further provided on the drainage tube 1. The infusion mechanism 6 includes an infusion tube 601, a liquid outlet tube 602, and a one-way valve 603. The infusion tube 601 is arranged outside the drainage tube 1, the liquid outlet tube 602 is arranged inside the drainage tube 1, the liquid outlet tube 602 is fixed to the inner wall of the drainage tube 1, and one end of the infusion tube 601 penetrates the drainage tube 1 and is connected to one end of the liquid outlet tube 602. The other end of the liquid outlet tube 602 is flush with the end of the drainage tube 1 close to the human body, and the one-way valve 603 is arranged on the other end of the liquid outlet tube 602. By arranging the liquid outlet tube 602 inside the drainage tube 1 and communicating it with the external infusion tube 601, when it is necessary to inject drugs into the cerebral ventricle during the drainage process, the drugs can be directly injected into the cerebral ventricle through the infusion tube 601 and the liquid outlet tube 602 without pulling out the drainage tube, making the operation convenient, and avoiding problems such as retrograde infection caused by occupying the drainage channel for drug injection operation and pipeline detachment caused by loosening of the three-way joint. Through the design of the one-way valve 603, the drugs can be injected into the cerebral ventricle through the infusion tube 601 and the liquid outlet tube 602, but the cerebrospinal fluid will not enter the infusion tube 601 and the liquid outlet tube 602, avoiding contamination of the infusion tube 601 and the liquid outlet tube 602.

[0029] When it is necessary to perform extracorporeal cerebrospinal fluid drainage on a patient using the automatic cerebrospinal fluid drainage device provided by the embodiments of the present invention, first, the outlet end of the drainage tube 1 and the flow control mechanism 3 are placed into the transparent liquid collection bag 7 through a collar, and the outlet end of the drainage tube 1 is aligned with the maximum drainage volume scale line on the liquid collection bag 7. Then, the notch end of the collar 8 is squeezed to adjust the tightness of the collar 8 so that the collar 8 is in close contact with the drainage tube 1. Then, the collar 8 and the drainage tube 1 are fixed by tightening the bolt 9. Then, the gauze 202 is placed on the patient's head. Specifically, the through hole in the middle of the annular airbag 204 is aligned with the head drainage hole of the patient. Then, the two straps 203 are respectively wound around from both sides of the patient synchronously, and then the movable ends of the two straps 203 are tied together to fix the gauze 202 to the patient's head. Then, the drainage end of the drainage tube 1 passes through the through hole in the middle of the annular airbag 204 and extends into the patient's ventricle through the head drainage hole of the patient. When the drainage tube 1 reaches an appropriate depth in the patient's ventricle, the adjusting rod 205 is rotated to drive the annular airbag 204 and the arc-shaped push plate 206 to rotate synchronously, so that the slider 207 gradually rotates along the arc-shaped groove 208 from the side with a larger groove width to the side with a smaller groove width. During the rotation process, as the groove width gradually decreases, a part of the slider 207 gradually exceeds the arc-shaped groove 208 and moves towards the middle, and then the annular airbag 204 is squeezed inward through the arc-shaped push plate 206. The annular airbag 204 deforms and gives an extrusion force to the outer wall of the drainage tube 1. When the drainage tube 1 is fixed to the annular airbag 204, the rotation of the adjusting rod 205 is stopped, so that the annular airbag 204 and the drainage tube 1 are fixed by extrusion. Then, cerebrospinal fluid drainage is carried out. During the drainage process, the pressure sensor 401 monitors the pressure value in the drainage tube 1 in real time, converts the pressure value into an electrical signal, and sends it to the controller. The controller is internally provided with a minimum pressure threshold and a maximum pressure threshold. When the pressure sensor 401 detects that the pressure value in the drainage tube 1 is too small and lower than the minimum pressure threshold set inside the controller, the controller controls the start of the peristaltic pump 5 to increase the pressure in the drainage tube 1, so that the flow rate of the drainage fluid in the drainage tube 1 increases. When the pressure sensor 401 detects that the pressure value in the drainage tube 1 is too high and reaches or exceeds the maximum pressure threshold set by the controller, the controller controls the closing of the peristaltic pump to reduce the pressure in the drainage tube 1, so that the flow rate of the drainage fluid in the drainage tube 1 decreases, thereby automatically controlling the drainage speed and the drainage volume in the drainage tube 1, so that the drainage speed can be controlled within a suitable speed range, and the problems of too slow or too fast drainage speed can be avoided.

[0030] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An automatic regulating cerebrospinal fluid drainage device, comprising a drainage tube (1), characterized in that: The end of the drainage tube (1) close to the human body is provided with a fixing mechanism (2), the end of the drainage tube (1) away from the human body is provided with a flow control mechanism (3), and the end of the drainage tube (1) away from the human body is connected to a liquid collection bag (7); A flow monitoring mechanism (4) and a peristaltic pump (5) are provided on the drainage tube (1), and the flow monitoring mechanism (4) and the peristaltic pump (5) are connected.

2. The automatic regulating cerebrospinal fluid drainage device according to claim 1, characterized in that: The fixing mechanism (2) comprises a fixing ring (201), a gauze (202), two binding straps (203) and a fixing unit; the gauze (202) is arranged outside the fixing ring (201); the two binding straps (203) are respectively connected to two sides of the gauze (203); the fixing unit is arranged inside the fixing ring (201); and the fixing unit is connected to the drainage tube (1).

3. The automatic regulating cerebrospinal fluid drainage device according to claim 2, characterized in that: The fixing unit comprises an annular airbag (204), an adjusting rod (205), two arc-shaped push plates (206), two sliders (207) and two arc-shaped grooves (208); the two arc-shaped push plates (206) are symmetrically arranged on the outer side of the annular airbag (204); the two sliders (207) are horizontally symmetrically arranged on the outer side of the corresponding arc-shaped push plates (206); the two arc-shaped grooves (208) are symmetrically opened on the inner wall of the fixing ring (201); the two sliders (207) are slidably connected to the corresponding arc-shaped grooves (208); and the adjusting rod (205) is arranged on the top of the annular airbag (204).

4. The automatic regulating cerebrospinal fluid drainage device according to claim 3, characterized in that: The curvature of each arc-shaped groove (208) gradually increases along the length direction of the arc-shaped groove (208), and an anti-slip strip (209) is provided on the inner side surface of the annular airbag (204).

5. The automatic regulating cerebrospinal fluid drainage device according to claim 1, characterized in that: The flow control mechanism (3) comprises a sealing plug (301), a limiting groove (302), a buoyancy ball (303), a connecting tube (304), a sliding unit and a plurality of liquid outlet holes (305); the top of the connecting tube (304) is connected to the outer side surface of the end of the drainage tube (1) away from the human body; the buoyancy ball (303) is movably arranged inside the connecting tube (304); the plurality of liquid outlet holes (305) are arranged on the outer side wall of the connecting tube (304); the sealing plug (301) is arranged inside the connecting tube (304); the limiting groove (302) is arranged at the bottom of the sealing plug (301); and the sliding unit is respectively connected to the drainage tube (1) and the sealing plug (301).

6. The automatic regulating cerebrospinal fluid drainage device according to claim 5, characterized in that: The sliding unit comprises two guide rods (306), two slide rails (307), two rollers (308) and two limit holes (309). The two slide rails (307) are symmetrically arranged on the inner wall of the drainage tube (1) at the end away from the human body. Each guide rod (306) is an inverted L-shaped structure, and the vertical ends of the two guide rods (306) are respectively vertically connected to the top of the sealing plug (301). The two rollers (308) are respectively connected to the horizontal ends of the corresponding guide rods (306). The two rollers (308) are respectively slidably connected to the corresponding slide rails (307). The two limit holes (309) are respectively arranged on the inner wall of the drainage tube (1) at the end away from the human body. Each limit hole (309) is respectively connected to the corresponding slide rail (307) at the same side.

7. The automatic regulating cerebrospinal fluid drainage device according to claim 1, characterized in that: The flow monitoring mechanism (4) comprises a pressure sensor (401) and a pressure display gauge (402); the pressure sensor (401) is arranged inside the drainage tube (1); the pressure display gauge (402) is arranged outside the drainage tube (1); the pressure display gauge (402) is electrically connected to the pressure sensor (401); and the pressure sensor (401) is electrically connected to the peristaltic pump (5) via a controller.

8. The automatic regulating cerebrospinal fluid drainage device according to claim 1, characterized in that: The drainage tube (1) is also provided with an infusion mechanism (6), the infusion mechanism (6) comprising an infusion tube (601), an outlet tube (602) and a one-way valve (603), the infusion tube (601) being provided outside the drainage tube (1), the outlet tube (602) being provided inside the drainage tube (1), one end of the infusion tube (601) passing through the drainage tube (1) and being connected to one end of the outlet tube (602), the other end of the outlet tube (602) being flush with an end of the drainage tube (1) close to the human body, and the one-way valve (603) being provided on the other end of the outlet tube (602).

9. The automatic regulating cerebrospinal fluid drainage device according to claim 1, characterized in that: A collar (8) is provided at the inlet of the liquid collecting bag (7), a bolt (9) for adjusting the size of the collar (8) is provided on the collar (8), and volume scale lines are provided on the liquid collecting bag (7).

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