Accurate controllable medical effusion drainage electric device

Abstract

The utility model provides a kind of precision controllable medical effusion drainage electric device, including shell, motor, peristaltic rotating shaft assembly, drainage component and effusion collection component, the shell includes fixedly connected shell and pump shell, the motor is located in shell, the peristaltic rotating shaft assembly is located in pump shell, the peristaltic rotating shaft assembly with gap between pump shell, motor is connected with peristaltic rotating shaft assembly, it is suitable to drive peristaltic rotating shaft assembly counterclockwise rotation, the drainage component includes connected drainage needle and catheter, the drainage needle is suitable for contacting with patient, the catheter enters pump shell from the right upper corner of the pump shell, counterclockwise direction is around peristaltic rotating shaft assembly and is located in the gap between peristaltic rotating shaft assembly and pump shell, and the catheter extends to pump shell outside from the right lower corner of pump shell and is connected with effusion collection component;The device of the utility model drives drainage flow rate and flow with electric power, with controllability and safety.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a precise and controllable electric device for draining medical fluid accumulation. Background Technology

[0002] Intensive care medicine (ICU) is a new form of medical organization and management that provides centralized and intensive treatment and nursing care for critically ill patients with various conditions, thanks to the development of advanced medical technologies and modern monitoring and resuscitation equipment. Drainage devices are frequently used in the clinical nursing care of various surgical procedures, such as catheterization, wound care, and drainage of effusions.

[0003] Currently, most clinical drainage devices used in ICUs rely on natural pressure for manual drainage. These devices are simple in structure, have limited function, and require frequent monitoring and replacement of the drainage bottle, making them inconvenient to operate. When the drainage bottle is full and not replaced promptly, it can easily lead to fluid backflow or overflow; when the natural pressure is insufficient, the fluid may not be completely drained; and when clots are drained, they can easily clog the drainage tube, thus affecting the drainage effect. Current clinical drainage devices lack precision and intelligence, requiring manual observation and control, which poses certain safety hazards.

[0004] CN118384353A discloses a tumor effusion drainage device, including a drainage component and a stirring component. The drainage component guides the flow of effusion, and the stirring component agitates pus and blood. The drainage component includes a drainage tube, and the stirring component includes a stirring rope and a disturbance group. The stirring rope is located inside the drainage tube, and the stirring group includes a stirring plate fixed to the stirring rope. This tumor effusion drainage device agitates the pus and blood in the effusion through the stirring plate and stirring rope, enhancing the agitation effect, preventing the pus and blood from coagulating, and keeping the drainage tube patent. This tumor effusion drainage device provides a method to prevent drainage tube blockage, but it does not solve the problems of frequent changes to the drainage bottle and incomplete drainage when natural pressure is insufficient.

[0005] Therefore, there is an urgent need to develop a precise and controllable electric medical fluid drainage device to solve the above problems. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a precise and controllable electric medical fluid drainage device to solve the defects of the prior art, which require medical staff to observe and change the fluid at all times, which is time-consuming and laborious, as well as the technical problems of fluid not being completely drained under natural pressure and drainage tube blockage.

[0007] To achieve the above and other related objectives, this utility model provides a precise and controllable electric medical effusion drainage device, including a housing, a motor, a peristaltic shaft assembly, a drainage assembly, and an effusion collection assembly. The housing includes a fixedly connected outer shell and a pump housing. The motor is disposed in the outer shell, and the peristaltic shaft assembly is disposed in the pump housing. A gap exists between the peristaltic shaft assembly and the pump housing. The motor is connected to the peristaltic shaft assembly and is adapted to drive the peristaltic shaft assembly to rotate counterclockwise or clockwise. The drainage assembly includes a connected drainage needle and a catheter. The drainage needle is adapted to contact the patient. The catheter enters the pump housing from the inlet and is disposed in the gap between the peristaltic shaft assembly and the pump housing in a counterclockwise or clockwise direction around the peristaltic shaft assembly. The catheter extends from the outlet of the pump housing to the outside of the pump housing and connects to the effusion collection assembly.

[0008] Preferably, the motor is connected to the peristaltic shaft assembly via a coupling.

[0009] Preferably, the peristaltic shaft assembly includes a shaft mounting plate, several rubber rollers, a shaft end cap, a connecting shaft, and a shaft fixing block. The shaft mounting plate and the shaft fixing block are concentrically fixedly connected. One end of the connecting shaft passes through the central hole of the shaft end cap 17 and is fixedly connected to the shaft end cap. The other end passes through the central holes of the shaft mounting plate and the shaft fixing block and is connected to the motor through the coupling. One end of each rubber roller is perpendicularly connected to the surface of the shaft mounting plate, and the other end is perpendicularly connected to the surface of the shaft end cap.

[0010] Preferably, the outer casing and the pump casing are fixedly connected by the peristaltic pump mounting post.

[0011] Preferably, the motor is fixed to the housing by a motor mounting plate, which is fixed to the inner side of the housing and fixedly connected to the peristaltic pump mounting column.

[0012] Preferably, the motor shaft of the motor passes through the center hole of the motor mounting plate, and the axes of the motor shaft, the coupling, and the connecting shaft are kept in a straight line. The motor shaft is fixedly connected to one end of the coupling, and the connecting shaft is fixedly connected to the other end of the coupling.

[0013] Preferably, the drainage needle includes a starting end and a tail end. The starting end is adapted to contact the patient, and the tail end is connected to the catheter through a main pipe of a three-way tube. A one-way valve is provided at the connection between the main pipe and the catheter to allow liquid to flow from the main pipe to the catheter.

[0014] Preferably, a one-way valve is provided at the connection between the conduit and the liquid collection assembly, which is suitable for liquid to flow from the conduit to the liquid collection assembly.

[0015] Preferably, the fluid collection assembly includes a drainage bag connected to a conduit, and the drainage bag is equipped with a liquid level sensor suitable for detecting the liquid level inside the drainage bag.

[0016] Preferably, the pump housing inlet is provided with a first tube clamp, the conduit enters the pump housing through the first tube clamp, and the first tube clamp is provided with a first flow rate sensor, which is suitable for detecting the inlet velocity of the liquid.

[0017] Preferably, the outlet of the pump housing is provided with a second tube holder, and the conduit extends to the outside of the pump housing through the second tube holder. The second tube holder is provided with a second flow rate sensor, which is suitable for detecting the outflow velocity of the liquid.

[0018] Preferably, the housing is further provided with a display screen, a handle, a speed control knob, an audible and visual alarm, and a main control switch. The handle is located on the top of the housing, and the display screen, speed control knob, audible and visual alarm, and main control switch are all located on the outer surface of the front of the housing.

[0019] Preferably, the device further includes a main control circuit, which is located at the bottom inner part of the housing. The main control circuit is electrically connected to the first flow rate sensor, the second flow rate sensor, the liquid level sensor, the motor, the display screen, the speed control knob, the audible and visual alarm, and the main control switch. The main control circuit is also connected to a control component, which is adapted to perform power-on control.

[0020] As described above, the precise and controllable electric medical drainage device of this invention has the following beneficial effects:

[0021] This invention relates to a precise and controllable electric medical fluid drainage device. The device uses a drainage component to draw out fluid from the patient's body, and then a motor controls a peristaltic shaft assembly to rotate and compress a catheter, causing the fluid to flow unidirectionally and ultimately collect in a fluid collection assembly. Furthermore, the motor speed is adjustable, allowing the peristaltic shaft assembly to rotate precisely and controllably according to the fluid volume and flow rate, preventing residual fluid from failing to drain or be absorbed naturally, thus avoiding symptom aggravation.

[0022] The precise and controllable electric medical drainage device of this invention uses drainage needles, catheters, and drainage bags that are currently used in clinical practice. It has low development costs and uses motor drive control, saving manpower and time costs. It is electrically controllable and can be monitored and alarmed, making daily care more convenient and faster, safer, and more efficient in medical services. It fills the gap in the field of medical electric drainage devices and provides a drainage device for clinical use.

[0023] The liquid level sensor used in this invention is integrated and adhered to the drainage bag. When replacing the drainage bag, it can be torn off and reattached, making it reusable, inexpensive, and easy to use. Attached Figure Description

[0024] Figure 1 A schematic diagram of a precise and controllable electric device for draining medical fluid.

[0025] Figure 2 This is a schematic diagram of the internal structure of the outer shell.

[0026] Figure 3 A cross-sectional view of a precise and controllable electric device for draining medical fluid.

[0027] Figure 4 This is a schematic diagram of the peristaltic rotating shaft assembly.

[0028] Attached icon number

[0029] 100. Housing; 300. Peristaltic shaft assembly; 400. Drainage assembly; 500. Liquid collection assembly; 1. Outer shell; 2. Pump housing; 3. Pump housing dust cover; 5. Guide tube; 6. First tube holder; 7. Drainage bag; 8. Liquid level sensor; 9. Drainage needle; 10. Second tube holder; 11. Motor; 12. Coupling; 13. Motor mounting plate; 14. Peristaltic pump mounting post; 15. Shaft mounting plate; 16. Rubber roller; 17. Shaft end cover; 18. Connecting shaft; 19. Shaft fixing block; 101. Display screen; 102. 103. Handle; 104. Speed ​​control knob; 105. Audible and visual alarm; 106. Main control switch; 107. Bottom rubber post; 108. Control component; 119. First through hole; 110. Main control circuit; 201. Third threaded hole; 202. Bottom hole; 1302. Second through hole; 1303. Fourth threaded hole; 1402. Second threaded hole; 1501 / 1704. First threaded hole; 1504 / 1701. Round hole; 1802. Shoulder; 1803. Tail end shaft; 1901. End face of rotating shaft fixing block. Detailed Implementation

[0030] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this invention, the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0033] In this utility model, "several" means two or more.

[0034] This utility model embodiment provides a precise and controllable electric medical fluid drainage device, including a housing 100, a motor 11, a peristaltic shaft assembly 300, a drainage assembly 400, and a fluid collection assembly 500. The housing 100 includes a fixedly connected outer shell 1 and a pump shell 2. The motor 11 is disposed in the outer shell 1, and the peristaltic shaft assembly 300 is disposed in the pump shell 2. A gap exists between the peristaltic shaft assembly 300 and the pump shell 2. The motor 11 is connected to the peristaltic shaft assembly 300. The device is adapted to drive the peristaltic rotating shaft assembly 300 to rotate counterclockwise or clockwise. The drainage assembly 400 includes a connected drainage needle 9 and a catheter 5. The drainage needle 9 is adapted to contact the patient. The catheter 5 enters the pump housing 2 from the inlet and is positioned in the gap between the peristaltic rotating shaft assembly 300 and the pump housing 2, rotating counterclockwise or clockwise around the peristaltic rotating shaft assembly 300. The catheter 5 extends from the outlet of the pump housing 2 to the outside of the pump housing 2 and connects to the fluid collection assembly 500. Figure 1 In the illustrated embodiment, the inlet of the pump housing 2 is located at the upper right corner, and the outlet is located at the lower right corner. The conduit 5 is disposed counterclockwise around the peristaltic shaft assembly 300 in the gap between the peristaltic shaft assembly 300 and the pump housing 2. When the inlet of the pump housing 2 is located at the upper left corner and the outlet is located at the lower left corner, the conduit 5 can be disposed clockwise in the gap between the peristaltic shaft assembly 300 and the pump housing 2.

[0035] The precise and controllable medical fluid drainage electric device of this invention drives the peristaltic rotating shaft assembly 300 to rotate counterclockwise or clockwise via the motor 11. During the rotation, the device squeezes the catheter 5, thereby controlling the flow of liquid in the drainage needle 9 to the catheter 5 and collecting it into the fluid collection assembly 500 through the squeezing action.

[0036] The electric rotation of the motor 11 is set to single-phase rotation to ensure that the peristaltic shaft assembly 300 can only rotate counterclockwise or clockwise under the drive of the motor 11, thus preventing liquid backflow.

[0037] In an optional embodiment, such as Figure 3 As shown, the motor 11 and the peristaltic shaft assembly 300 are connected by a coupling 12.

[0038] In an optional embodiment, such as Figure 3 As shown, the peristaltic shaft assembly 300 includes a shaft mounting plate 15, several rubber rollers 16, a shaft end cover 17, a connecting shaft 18, and a shaft fixing block 19. The shaft mounting plate 15 and the shaft fixing block 19 are concentrically fixedly connected. One end of the connecting shaft 18 passes through the central hole of the shaft end cover 17 and is fixedly connected to the shaft end cover 17. The other end passes through the central holes of the shaft mounting plate 15 and the shaft fixing block 19 and is connected to the motor 11 through the coupling 12. One end of each rubber roller 16 is perpendicularly connected to the plate surface of the shaft mounting plate 15, and the other end is perpendicularly connected to the cover surface of the shaft end cover 17.

[0039] The rubber roller 16 has a rubber layer cast on its surface and bearings installed inside its two end faces, allowing it to rotate. It has good elasticity and rotation performance, which can prevent the conduit 5 from being ruptured due to overpressure, reduce wear, and improve the convenience and safety of use.

[0040] The gap between the peristaltic shaft assembly 300 and the pump housing 2 is the same as the gap between the rubber roller 16 and the pump housing 2. The thickness of the gap is less than the diameter of the conduit 5. The conduit 5 is inserted into the gap between the pump housing 2 and the rubber roller 16, and wraps around the left half of the peristaltic shaft assembly 300. During the rotation of the peristaltic shaft assembly 300, the rubber roller 16 exerts a squeezing effect on the conduit 5, which can drive the accumulated fluid out.

[0041] like Figure 4As shown, the shaft end cover 17 is opposite to the shaft mounting plate 15. Each of the rubber rollers 16 has a stud and a cylinder at both ends. The stud at one end of the rubber roller 16 is fixedly connected to the first threaded hole 1501 / 1704 on the shaft mounting plate 15 or the shaft end cover 17 by a threaded connection. The cylinder at the other end is inserted into the round hole 1504 / 1701 provided on the shaft mounting plate 15 or the shaft end cover 17. In a preferred embodiment, the peristaltic shaft assembly 300 includes four rubber rollers 16, which are installed alternately in a clockwise direction: the stud of the first rubber roller 16 is fixedly connected to the first threaded hole 1501 of the shaft mounting plate 15 by a threaded connection, and the cylindrical end of the first rubber roller 16 is inserted into the circular hole 1701 of the shaft end cover 17; the stud of the second rubber roller 16 is fixedly connected to the first threaded hole 1704 of the shaft end cover 17 by a threaded connection, and the cylindrical end of the second rubber roller 16 is inserted into the circular hole 1504 of the shaft mounting plate 15; the installation form of the third rubber roller 16 is the same as that of the first rubber roller, and the installation form of the fourth rubber roller 16 is the same as that of the second rubber roller.

[0042] The end face 1901 of the rotating shaft fixing block 19 is in contact with the countersunk end face of the rotating shaft mounting plate 15, and the rotating shaft fixing block 19 and the rotating shaft mounting plate 15 can be fixedly connected by screws.

[0043] In an optional embodiment, such as Figure 3 As shown, the outer casing 1 and the pump casing 2 are fixedly connected by the peristaltic pump mounting post 14. One end of the peristaltic pump mounting post 14 is connected to a stud section, and the other end is provided with a second threaded hole. The pump casing 2 is also provided with a third threaded hole 201. The stud section of the peristaltic pump mounting post 14 is screwed into the third threaded hole 201 of the pump casing 2 and locked in place.

[0044] In an optional embodiment, such as Figure 2 As shown, the motor 11 is fixed to the housing 1 by a motor mounting plate 13. The motor mounting plate 13 is fixed to the inner side of the housing 1 and is fixedly connected to the peristaltic pump mounting post 14. The motor 11 and the motor mounting plate 13 are fixed together by a threaded connection.

[0045] In an optional embodiment, such as Figure 3As shown, the motor shaft of the motor 11 passes through the center hole of the motor mounting plate 13. The axes of the motor shaft, the coupling 12, and the connecting shaft 18 are kept in a straight line. The motor shaft is fixedly connected to one end of the coupling 12, and the connecting shaft 18 is fixedly connected to the other end of the coupling 12. This ensures that when the motor 11 is powered on and rotates its motor shaft, it drives the connecting shaft 18 to rotate, thereby driving the peristaltic shaft assembly 300 to rotate, while the outer casing 1 and the pump casing 2 remain relatively stationary.

[0046] Among them, such as Figure 3 As shown, the motor mounting plate 13 is provided with a plurality of fourth threaded holes 1303, and the outer shell 1 is provided with a plurality of first through holes 111. The number of fourth threaded holes 1303 and the number of first through holes 111 are equal, and it is ensured that the axis of each fourth threaded hole 1303 of the motor mounting plate 13 is aligned with the axis of each first through hole 111 of the outer shell 1. The motor mounting plate 13 and the outer shell 1 are fixedly connected by screws passing through the corresponding fourth threaded holes 1303 and first through holes 111.

[0047] like Figure 3 As shown, the motor mounting plate 13 is also provided with a plurality of second through holes 1302, so that the second threaded hole 1402 of each peristaltic pump mounting post 14 is kept in the same straight line as the axis of each second through hole 1302 of the motor mounting plate 13, and the peristaltic pump mounting post 14 is fixedly connected to the motor mounting plate 13 by screws passing through the corresponding second through holes 1302 and second threaded holes 1402.

[0048] like Figures 3-4 As shown, the connecting shaft 18 includes a tail end shaft 1803 and a shoulder 1802. The shoulder 1802 fits against the countersunk end face of the shaft end cover 17. The connecting shaft 18 is fixedly connected to the shaft end cover 17 by screws passing through the shoulder 1802 and the countersunk end face. The tail end shaft 1803 passes through the bottom hole 202 of the pump housing 2 and forms a hole-shaft fit with the inner hole of the coupling 12 and is fixed thereto. The axis of the motor shaft of the motor 11 is kept in the same straight line as the axis of the tail end shaft 1803 and the axis of the coupling 12, and the motor shaft of the motor 11 is installed into the inner hole on the other side of the coupling 12 to form a hole-shaft fit relationship.

[0049] In an optional embodiment, such as Figures 1-2 As shown, the drainage needle 9 includes a starting end and a tail end. The starting end is adapted to contact the patient, and the tail end is connected to the catheter 5 through the main pipe of the three-way tube. A one-way valve is provided at the connection between the main pipe and the catheter 5, which is adapted to allow liquid to flow from the main pipe to the catheter 5.

[0050] In an optional embodiment, a one-way valve is provided at the connection between the conduit 5 and the liquid collection assembly 500, which is suitable for liquid to flow from the conduit 5 to the liquid collection assembly 500.

[0051] In an optional embodiment, such as Figure 1 As shown, the fluid collection assembly 500 includes a drainage bag 7, which is connected to a conduit 5. The drainage bag 7 is equipped with a liquid level sensor 8, which is suitable for detecting the liquid level inside the drainage bag 7.

[0052] In an optional embodiment, such as Figure 1 As shown, the pump housing 2 has a first tube clamp seat 6 at its inlet, and the conduit 5 enters the pump housing 2 through the first tube clamp seat 6. The first tube clamp seat 6 is equipped with a first flow rate sensor, which is suitable for detecting the inlet speed of the liquid.

[0053] In an optional embodiment, such as Figure 1 As shown, the outlet of the pump housing 2 is provided with a second tube holder 10, and the conduit 5 extends to the outside of the pump housing 2 through the second tube holder 10. The second tube holder 10 is provided with a second flow rate sensor, which is suitable for detecting the outflow velocity of the liquid.

[0054] The front side of the pump casing 2 is a transparent plastic dust cover 3, which has a certain dustproof effect and allows for clear observation of the liquid flow state in the conduit 5 and the rotation state of the peristaltic shaft assembly 300 during use.

[0055] In an optional embodiment, such as Figure 1 As shown, the outer casing 1 is also equipped with a display screen 101, a handle 102, a speed control knob 103, an audible and visual alarm 104, and a main control switch 105. The handle 102 is located on the top of the outer casing 1, and the display screen 101, speed control knob 103, audible and visual alarm 104, and main control switch 105 are all located on the outer surface of the front of the outer casing 1.

[0056] The bottom of the outer shell 1 is also provided with a bottom rubber column 108, which can play a role in leveling and vibration reduction.

[0057] In an optional embodiment, such as Figure 1 As shown, the device also includes a main control circuit 112, which is located at the bottom inner part of the housing 1. The main control circuit 112 is electrically connected to the first flow rate sensor, the second flow rate sensor, the liquid level sensor 8, the motor 11, the display screen 101, the speed control knob 103, the audible and visual alarm 104, and the main control switch 105. The main control circuit 112 is also connected to a control component 109, which is adapted to perform power-on control. The control component 109 controls the power supply of the entire device, and the main control switch 105 controls the motor 11 to run, thereby driving the entire device. The control component 109 shown is a power plug.

[0058] The first flow rate sensor, the second flow rate sensor, and the liquid level sensor 8 are all integrated into the machine control circuit 112. The speed control knob 103 is used to control the rotation speed of the motor 11; the audible and visual alarm 104 is used to sound an alarm when the liquid level in the drainage bag 7 reaches the height of the liquid level sensor 8, at which time medical staff open the valve of the drainage bag 7 to pour out and collect the liquid; the main control switch 105 is used to control the start and emergency stop of the device; the display screen 101 is used to display the liquid inlet speed detected by the first flow rate sensor and the liquid outlet speed detected by the second flow rate sensor. Then, based on the data or the observed volume of liquid accumulated in the drainage bag 7, medical staff rotate the speed control knob 103 to control the rotation of the motor 11, thereby achieving precise control of the flow rate of the drainage liquid.

[0059] When using the precise and controllable electric medical drainage device of this utility model:

[0060] 1. Based on the type of fluid accumulation, determine the drainage method, select the drainage needle 9, and install the catheter 5 and drainage bag 7;

[0061] 2. After selecting a suitable area using imaging techniques such as color Doppler ultrasound or CT scan, perform local disinfection and insert a drainage needle 9 into the selected area;

[0062] 3. Connect the socket to power on, turn on the main control switch 105 to make the motor 11 work and drive the peristaltic shaft assembly 300 to rotate; turn the speed adjustment knob 103 to adjust the speed to the lowest value;

[0063] 4. The conduit 5 is peristaltically squeezed by the peristaltic rotating shaft assembly 300 in the pump casing, and both ends are embedded in the tube holder;

[0064] 5. Turn the speed control knob to adjust the flow rate of the accumulated liquid to the most suitable value.

[0065] In summary, the precise and controllable electric medical fluid drainage device provided by this utility model embodiment is electrically driven, precisely controls the drainage flow rate and volume, and, in conjunction with a flow rate sensor and a liquid level sensor, provides timely feedback and alarms, thereby improving the controllability and safety of the drainage process.

[0066] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0067] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A precise and controllable electric medical fluid drainage device, characterized in that, The device includes a housing (100), a motor (11), a peristaltic shaft assembly (300), a drainage assembly (400), and a fluid collection assembly (500). The housing (100) includes a fixedly connected outer shell (1) and a pump shell (2). The motor (11) is located in the outer shell (1), and the peristaltic shaft assembly (300) is located in the pump shell (2). There is a gap between the peristaltic shaft assembly (300) and the pump shell (2). The motor (11) is connected to the peristaltic shaft assembly (300) and is adapted to drive the peristaltic shaft assembly. (300) Rotate counterclockwise or clockwise, the drainage assembly (400) includes a connected drainage needle (9) and a catheter (5), the drainage needle (9) is adapted to contact the patient, the catheter (5) enters the pump housing (2) from the inlet of the pump housing (2), and is disposed in the gap between the peristaltic shaft assembly (300) and the pump housing (2) in a counterclockwise or clockwise direction around the peristaltic shaft assembly (300), and the catheter (5) extends from the outlet of the pump housing (2) to the outside of the pump housing (2) and connects to the fluid collection assembly (500).

2. The precise and controllable electric medical fluid drainage device as described in claim 1, characterized in that, The motor (11) is connected to the peristaltic shaft assembly (300) via a coupling (12).

3. The precise and controllable electric medical fluid drainage device as described in claim 2, characterized in that, The peristaltic rotating shaft assembly (300) includes a rotating shaft mounting plate (15), several rubber rollers (16), a rotating shaft end cover (17), a connecting shaft (18), and a rotating shaft fixing block (19). The rotating shaft mounting plate (15) and the rotating shaft fixing block (19) are concentrically fixedly connected. One end of the connecting shaft (18) passes through the central hole of the rotating shaft end cover (17) and is fixedly connected to the rotating shaft end cover (17). The other end passes through the central holes of the rotating shaft mounting plate (15) and the rotating shaft fixing block (19) and is connected to the motor (11) through the coupling (12). One end of each of the rubber rollers (16) is perpendicularly connected to the plate surface of the rotating shaft mounting plate (15), and the other end is perpendicularly connected to the cover surface of the rotating shaft end cover (17).

4. The precise and controllable electric medical fluid drainage device as described in claim 3, characterized in that, The outer casing (1) and the pump casing (2) are fixedly connected by a peristaltic pump mounting post (14).

5. The precise and controllable electric medical fluid drainage device as described in claim 4, characterized in that, The motor (11) is fixed in the housing (1) by the motor mounting plate (13), the motor mounting plate (13) is fixed to the inner side of the housing (1) and is fixedly connected to the peristaltic pump mounting column (14).

6. The precise and controllable electric medical fluid drainage device as described in claim 5, characterized in that, The motor shaft of the motor (11) passes through the center hole of the motor mounting plate (13). The axes of the motor shaft, the coupling (12) and the connecting shaft (18) are kept in a straight line. The motor shaft is fixedly connected to one end of the coupling (12), and the connecting shaft (18) is fixedly connected to the other end of the coupling (12).

7. The precise and controllable electric medical drainage device as described in claim 1, characterized in that, The drainage needle (9) includes a beginning end and a tail end. The beginning end is adapted to contact the patient, and the tail end is connected to the catheter (5) through the main pipe of the three-way tube. A one-way valve is provided at the connection between the main pipe and the catheter (5) to allow liquid to flow from the main pipe to the catheter (5). And / or, a one-way valve is provided at the connection between the conduit (5) and the liquid collection assembly (500), which is suitable for liquid to flow from the conduit (5) to the liquid collection assembly (500).

8. The precise and controllable electric medical fluid drainage device as described in claim 1, characterized in that, The fluid collection assembly (500) includes a drainage bag (7), which is connected to a conduit (5). The drainage bag (7) is equipped with a liquid level sensor (8) to detect the liquid level inside the drainage bag (7). And / or, the inlet of the pump housing (2) is provided with a first tube holder (6), the conduit (5) enters the pump housing (2) through the first tube holder (6), and the first tube holder (6) is provided with a first flow rate sensor, which is suitable for detecting the inlet speed of the liquid; And / or, the outlet of the pump housing (2) is provided with a second tube holder (10), the conduit (5) extends to the outside of the pump housing (2) through the second tube holder (10), and the second tube holder (10) is provided with a second flow rate sensor, which is suitable for detecting the outflow velocity of the liquid.

9. The precise and controllable electric medical fluid drainage device as described in claim 8, characterized in that, The outer casing (1) is also provided with a display screen (101), a handle (102), a speed control knob (103), an audible and visual alarm (104), and a main control switch (105). The handle (102) is located on the top of the outer casing (1), and the display screen (101), speed control knob (103), audible and visual alarm (104), and main control switch (105) are all located on the outer surface of the front of the outer casing (1).

10. The precise and controllable electric medical fluid drainage device as described in claim 9, characterized in that, The device also includes a main control circuit (112), which is located at the bottom of the inner shell (1). The main control circuit (112) is electrically connected to the first flow rate sensor, the second flow rate sensor, the liquid level sensor (8), the motor (11), the display screen (101), the speed control knob (103), the audible and visual alarm (104), and the main control switch (105). The main control circuit (112) is also connected to a control component (109), which is adapted to perform power-on control.

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