Perfusion and drainage system with pressure and flow monitoring and control functions

Abstract

The invention belongs to the technical field of medical flushers, and particularly relates to an infusion and drainage system with pressure and flow monitoring and control functions, which comprises a pipeline system and a control platform, and is characterized in that the pipeline system comprises a drainage tube and an infusion tube; the drainage part comprises a drainage mechanism and a drainage control mechanism, the drainage tube is connected with the drainage mechanism, the drainage control mechanism comprises a drainage driving device, a first flow meter and a first pressure meter, and the drainage driving device drives the drainage control mechanism; the perfusion part comprises a perfusion mechanism and a perfusion control mechanism, the perfusion pipe is connected with the perfusion mechanism, the perfusion control mechanism comprises a perfusion driving device, a second flow meter and a second pressure meter, and the perfusion driving device drives the perfusion control mechanism; the control system is used for controlling and monitoring the drainage part and the perfusion part. According to the invention, the problems of flushing, drainage, and monitoring and control of inlet and outlet flow and pressure in a clinical operation are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical flushers, and in particular relates to a perfusion and drainage system with pressure and flow monitoring and control functions. Background Art

[0002] After or during surgery, body tissues will produce fluids such as blood, exudate, and pus. Therefore, it is necessary to use a drain to drain these fluids from the surgical site or body cavity to prevent local accumulation of fluids. Drainage tubes are often used clinically for drainage. In some cases, drainage pressure and drainage volume also need to be monitored during drainage.

[0003] However, existing drainage tubes or drainage devices can only discharge fluid from the body, and do not have the function of monitoring drainage pressure and drainage volume. In addition, in surgical sites such as the intracranial, thoracic, abdominal, and bladder, fluid may continue to be produced in the tissues during or after surgery. Drainage alone cannot guarantee the cleanliness of the surgical area. Therefore, the surgical area needs to be flushed, and the irrigation volume and irrigation pressure need to be controlled during flushing. However, relying on drainage tubes cannot achieve monitoring and control of irrigation volume and irrigation pressure. Summary of the invention

[0004] The present invention is intended to provide a perfusion and drainage system with pressure and flow monitoring and control functions to solve the problem of requiring both flushing and drainage as well as monitoring and control of inlet and outlet flow and pressure in clinical surgery.

[0005] In order to achieve the above-mentioned object, the scheme of the present invention is: a perfusion drainage system with pressure and flow monitoring and control functions, including a pipeline system and a control platform:

[0006] Tubing system, including drainage and irrigation tubes;

[0007] Control platform, including drainage unit, perfusion unit and control system:

[0008] The drainage part includes a drainage mechanism and a drainage control mechanism, the drainage tube is connected to the drainage mechanism, the drainage mechanism is used to drive the fluid flow in the drainage tube, the drainage control mechanism includes a drainage drive device, a first flow meter and a first pressure gauge, and the drainage drive device drives the drainage control mechanism;

[0009] The perfusion part includes a perfusion mechanism and a perfusion control mechanism, the perfusion tube is connected to the perfusion mechanism, the perfusion mechanism is used to drive the fluid in the perfusion tube to flow in the opposite direction of the drainage direction, the perfusion control mechanism includes a perfusion drive device, a second flow meter and a second pressure gauge, and the perfusion drive device drives the perfusion control mechanism;

[0010] The control system is connected with the drainage driving device, the perfusion driving device, the first flow meter, the second flow meter, the first pressure gauge and the second pressure gauge by signal.

[0011] The working principle and beneficial effects of this solution are:

[0012] 1. The pipeline system and the control platform are separated and modularly designed, so that the pipeline system can be used independently. On the one hand, it is convenient to replace pipeline systems of different specifications according to different clinical operations; on the other hand, it is convenient to use the pipeline system as a disposable consumable, ensuring the reusability of the control platform and greatly reducing the medical costs of patients using this system; on the other hand, whether it is perfusion fluid or drainage fluid flowing out of the patient's body, it only passes through the pipeline system and will not directly contact the control platform and the outside world, greatly reducing the risk of infection.

[0013] 2. The drainage and perfusion parts can be accurately controlled through the control system, and the flow and pressure can be intuitively detected through the corresponding flow meter and pressure gauge, which is convenient for doctors to set and control the flow and pressure of drainage and flushing.

[0014] 3. When draining, the drainage part is used, and the drainage mechanism is accurately controlled by the drainage control mechanism, and the control result is monitored by the first flow meter and the first pressure gauge, so as to achieve the effect of accurately controlling the pressure and amount of drainage; when perfusion, the perfusion part is used, and the perfusion mechanism is accurately controlled by the perfusion control mechanism, and the control result is monitored by the second flow meter and the second pressure gauge, so as to achieve the effect of accurately controlling the pressure and amount of flushing; if necessary, drainage and flushing can also be performed at the same time.

[0015] Optionally, it also includes a liquid supply part, which is used to contain the perfusion liquid during perfusion when connected to the perfusion tube.

[0016] Optionally, it also includes a body, a control platform is installed in the body, the body includes an operation panel, a display screen and an operation compartment, the control system is integrated in the operation panel compartment, and the drainage part and the perfusion part are installed in the operation compartment.

[0017] Optionally, the perfusion mechanism and the drainage mechanism are integrated: comprising a skeleton, a groove is circumferentially arranged on the outer edge of the skeleton, a plurality of balls are arranged in the groove, a helix is ​​arranged on one side of the skeleton, a spiral groove is opened on the helix and cooperates with the balls, a spiral drive device for driving the helix to rotate axially is connected to the helix, and pressure covers are respectively arranged on both sides of the helix, and the pressure covers are slidably connected to the operating chamber; the perfusion drive device and the drainage drive device both include a driver and a wedge, the working end of the driver makes reciprocating motion, and the wedge is installed on the working end of the driver.

[0018] The frame and the grooves on both sides of the frame, the glands on both sides and the balls constitute the drainage mechanism and the perfusion mechanism: after the drainage tube and the perfusion tube are respectively pressed on both sides of the frame by the glands, the spiral drive device drives the spiral body to rotate axially. When the spiral body rotates, the spiral groove on it drives the balls to roll in the groove along the circumference of the frame. During the rolling process, when rolling to one side of the drainage tube, the balls squeeze the drainage tube, allowing the fluid in the drainage tube to flow from one end to the other end, thereby forming a pump pressure at one end of the drainage tube for drainage; and when rolling to one side of the perfusion tube, the balls squeeze the perfusion tube, allowing the fluid in the perfusion tube to flow in the opposite direction relative to the flow direction of the drainage tube, thereby forming a pump pressure at the end of the perfusion tube close to the drainage tube where the pump pressure is formed, for flushing. The adjustment of the pressure and flow of drainage and flushing is controlled by the driver and the driving device. The driver drives the wedge to expand and contract, and the wedge squeezes the gland to control the distance between it and the groove, thereby controlling the opening and closing degree of the pipeline system, controlling the flow rate, and thus controlling the flow. The stroke of the working end of the driver controls the telescopic stroke of the gland and the wedge, thereby controlling the amount by which the wedge squeezes the gland. The greater the squeezing amount, the smaller the spacing, the greater the flushing or drainage pressure and the smaller the flow rate. When the spiral drive device drives the spiral body to rotate, the higher the speed, the faster the ball rolls, the greater the flushing or drainage pressure and the greater the flow rate, and vice versa.

[0019] Optionally, the liquid supply unit includes a liquid supply driver, a barrel and a pressure plate, the pressure plate is slidably connected in the barrel, the barrel has a liquid outlet, and the working end of the liquid supply driver is connected to the pressure plate and enables the pressure plate to reciprocate in the barrel.

[0020] Optionally, the spiral drive device includes a speed change mechanism and a motor, the speed change mechanism includes a worm gear mechanism, the worm gear is arranged in the middle of the spiral body and is coaxially connected to the spiral body, and the worm gear is connected to the output end of the motor.

[0021] Optionally, the drainage tube and the perfusion tube are arranged side by side and in a Y shape.

[0022] Optionally, an alarm module is also included. The alarm module is integrated in the control system. After the flow or pressure threshold is set through the operation panel, the control system calculates the cumulative flow or real-time pressure based on the second flow meter and the second pressure gauge. When the cumulative flow is greater than the flow threshold or the real-time pressure is greater than the pressure threshold, the alarm module sends an alarm message to the outside world.

[0023] Optionally, it also includes a valve mechanism, which includes a valve sleeve and a valve core. The valve sleeve is provided with a tube-penetrating hole for the drainage tube and the perfusion tube to pass through. The valve core is rotatably connected in the valve sleeve. Three groups of protrusions are provided on the valve core, which are respectively used to squeeze the drainage tube alone, squeeze the perfusion tube alone, and squeeze the drainage tube and the drainage tube at the same time. There is also a gap on the valve core, which is used to release the drainage tube and the perfusion tube at the same time.

[0024] Optionally, an angle sensor for sensing the rotation angle of the valve core is also provided at the end of the valve core, and the angle sensor is connected to the control system signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a perfusion and drainage system with pressure and flow monitoring and control functions in Embodiment 1 of the present invention. DETAILED DESCRIPTION

[0026] The following is further described in detail through specific implementation methods:

[0027] The marks in the drawings of the specification include: body 1, operation compartment 101, operation panel 102, display screen 103, LED light 104, drainage tube 2, perfusion tube 3, skeleton 4, groove 401, ball 402, sleeve 5, worm gear mechanism 6, micro electric cylinder 7, wedge block 8, pressure cover 9, rib 10, flow meter hole 11, pressure gauge hole 12, valve sleeve 13, valve core 14.

[0028] Example

[0029] This embodiment is basically Figure 1 As shown: A perfusion drainage system with pressure and flow monitoring and control functions, including a body 1, a pipeline system and a control platform:

[0030] The pipeline system includes a drainage tube 2 and an irrigation tube 3, which are arranged side by side and in a Y shape. The hardness of the straight handle part of the Y shape is greater than that of the bifurcated part, and the straight handle part is a double-channel tube arranged side by side, which is convenient for doctors to operate. The drainage tube 2 and the irrigation tube 3 of the bifurcated part have certain flexibility and fatigue resistance, and in this embodiment, they are made of the same material as the commonly used infusion tube.

[0031] The body 1 includes an operation panel 102, a display screen 103 and an operation chamber 101. The operation panel 102 and the display screen 103 are located on the same side of the operation chamber 101. A protective cover is provided on the other side of the operation chamber 101. The protective cover covers the operation chamber 101 and is buckled onto the operation chamber 101. After the drainage tube 2 and the perfusion tube 3 are connected to the operation chamber 101, the protective cover covers the entire operation chamber 101 to protect the components inside the operation chamber 101.

[0032] Control platform, including drainage unit, perfusion unit and control system:

[0033] The drainage part and the perfusion part are both arranged in the operation chamber 101. In this embodiment, a perfusion mechanism and a drainage mechanism with a more compact structure and more convenient operation and control are used: including a skeleton 4, in this embodiment, the skeleton 4 is annular, and the skeleton 4 is circumferentially provided with an outward groove 401, and a plurality of balls 402 are arranged in the groove 401. A sleeve 5 is arranged on one side of the skeleton 4, and the groove 401 passes through the sleeve 5. A spiral body is coaxially connected in the sleeve 5, and a spiral groove that is spiral and cooperates with the ball 402 is opened on the spiral body, and a spiral driving device that drives the spiral body to rotate axially is connected to the spiral body. The spiral driving device includes a speed change mechanism and a motor, and the speed change mechanism includes a worm gear mechanism 6, the worm wheel is arranged in the middle of the spiral body and is coaxially connected with the spiral body, the radius difference between the worm wheel and the spiral body is not less than the diameter of the ball 402, and the worm is connected to the output end of the motor. When the motor of the spiral driving device rotates, it drives the spiral body to rotate, thereby driving the ball 402 to roll cyclically along the groove 401. The higher the speed of the motor, the faster the ball 402 circulates and rolls, and the greater the flow rate. The flow rate can be adjusted and controlled by controlling the speed of the motor.

[0034] Gland 9 is provided on both sides of the spiral body, and the gland 9 is slidably connected with the operation chamber 101. The skeleton 4, the groove 401 on one side of the skeleton 4, the ball 402 and the gland 9 constitute a drainage mechanism, and the skeleton 4, the groove 401 on the other side of the skeleton 4, the ball 402 and the gland 9 constitute a perfusion mechanism. The perfusion drive device and the drainage drive device both include a driver and a wedge 8, the working end of the driver reciprocates, and the wedge 8 is installed on the working end of the driver. The driver is preferably a micro-electric cylinder 7 or a combination of a servo motor and a lead screw structure, which can drive the wedge 8 to perform precise and controllable reciprocating linear motion. In this embodiment, the driver is a micro-electric cylinder 7. The ribs 10 on both sides of the operation chamber 101 are against the wedge 8, and the wedge 8 is against the rib 10 on one side and fits with the gland 9 on the other side. When the wedge 8 is inserted between the rib 10 and the gland 9 under the drive of the driver, the spacing between the gland 9 and the groove 401 / ball 402 is smaller, and the reverse spacing is larger. The spiral drive device, the spiral body, the speed change mechanism and the motor, the driver and the wedge block 8, the first flow meter, the first pressure gauge, the second flow meter, and the second pressure gauge together constitute a drainage control mechanism and an infusion control mechanism. In other embodiments, the drainage mechanism can also be a vacuum pump or a medical pump pressure aspirator; the infusion mechanism can also be an infusion pump or a syringe pump.

[0035] Before use, the driver drives the wedge 8 back, loosens the gland 9, and opens the two glands 9 to both sides, so that the two sides of the bifurcated portion formed by the drainage tube 2 and the perfusion tube 3 are respectively inserted between the glands 9 and the balls 402 on both sides. The driver drives the wedge 8 forward to clamp the gland 9.

[0036] After the drainage tube 2 and the perfusion tube 3 are respectively pressed on both sides of the skeleton 4 by the gland 9, the motor rotates, and the spiral body rotates axially under the drive of the worm gear structure. When the spiral body rotates, the spiral groove thereon drives the ball 402 to roll in the groove 401 along the circumference of the skeleton 4. During the rolling process, when rolling to one side of the drainage tube 2, the ball 402 squeezes the drainage tube 2, allowing the fluid in the drainage tube 2 to flow from one end to the other end, thereby forming a pump pressure in the local part of the drainage tube 2 for drainage; and when rolling to one side of the perfusion tube 3, the ball 402 squeezes the perfusion tube 3 to form a pump pressure, allowing the fluid in the perfusion tube 3 to flow in the opposite direction relative to the flow direction of the drainage tube 2 for flushing. The adjustment of drainage and flushing pressure and flow is controlled by the driver and the driving device. The driver drives the wedge 8 to expand and contract, and the wedge 8 squeezes the gland 9 (for pipeline systems with smaller pipe diameters, pads can be added inside or outside the gland 9, or a matching gland 9 can be replaced), and the spacing between the groove 401 is controlled, thereby controlling the opening and closing degree of the pipeline system, controlling the flow rate, and thus controlling the flow. The stroke of the working end of the driver controls the expansion and contraction stroke of the gland 9 and the wedge 8, thereby controlling the amount of the wedge 8 squeezing the gland 9. The greater the squeezing amount, the smaller the spacing, the greater the flushing or drainage pressure and the smaller the flow; when the spiral drive device drives the spiral body to rotate, the higher the speed, the faster the rolling of the ball 402, the greater the flushing or drainage pressure and the greater the flow, and vice versa.

[0037] The control system is connected to the drainage drive device, the perfusion drive device, the first flowmeter, the second flowmeter, the first pressure gauge and the second pressure gauge by signal. The control system is a microcomputer system with input, output, calculation and storage functions. The pressure and flow information set by the operator on the operation panel 102 are converted into control information of the drainage drive device and the perfusion drive device after calculation by the control system, and the stroke of their actions is controlled, thereby accurately controlling the pressure and flow, and verifying and correcting through the real-time monitoring data of the flowmeter and the pressure gauge. The first flowmeter and the second flowmeter are preferably electromagnetic flow sensors or ultrasonic flow sensors to achieve non-contact flow monitoring with the liquid. In this embodiment, ultrasonic flow sensors are used. The first pressure gauge and the second flowmeter use capacitive pressure sensors to achieve non-contact pressure monitoring with the liquid. Two flowmeter holes 11 and two pressure gauge holes 12 are provided in the operation chamber 101. The flowmeter holes 11 and the pressure gauge holes 12 are formed by U-shaped buckles buckled on the bottom wall of the operation chamber 101, which is convenient for installing the drainage tube 2 and the perfusion tube 3. The first flow meter and the second flow meter are respectively installed in the operating chamber 101 below the two flow meter holes 11, the first pressure gauge and the second pressure gauge are respectively installed in the operating chamber 101 below the two pressure gauge holes 12, the drainage tube 2 passes through one flow meter hole 11 and one pressure gauge hole 12, and the perfusion tube 3 passes through the other flow meter hole 11 and pressure gauge hole 12.

[0038] In this embodiment, the liquid supply unit includes a liquid supply driver, a holding barrel and a pressure plate. The pressure plate is slidably connected in the holding barrel. The holding barrel has a liquid outlet. The working end of the liquid supply driver is connected to the pressure plate and causes the pressure plate to reciprocate in the holding barrel. The liquid supply driver is also preferably a combination of a micro-electric cylinder 7 or a servo motor and a screw structure. The liquid used for perfusion is usually physiological saline, which is packaged in bags. The physiological saline is inserted into the perfusion tube 3 and placed in the holding barrel, or the physiological saline is directly poured into the sterilized holding barrel. The pressure plate is driven to squeeze by controlling the liquid supply driver, so that the perfusion liquid is pressed out, and the perfusion pressure is directly controlled by the liquid supply unit. In other embodiments, the liquid supply unit may not be used, and the perfusion liquid is directly connected to the perfusion tube 3, and the perfusion liquid flows freely into the perfusion unit, and the perfusion pressure is controlled by the perfusion unit.

[0039] In this embodiment, an alarm module is also included, which is an LED light 104 and a buzzer set on the body 1 in this embodiment. The alarm module is integrated in the control system. After the flow rate or pressure threshold is set through the operation panel 102, the control system calculates the cumulative flow rate or real-time pressure according to the second flow meter and the second pressure meter. When the cumulative flow rate is greater than the flow rate threshold or the real-time pressure is greater than the pressure threshold, the alarm module sends an alarm message to the outside world. In this embodiment, it is manifested as the LED light 104 flashing and the buzzer sounding. In other embodiments, the alarm module also includes a Bluetooth module or a Wifi module to facilitate sending alarm information to other terminals that are connected to the system by signal.

[0040] In this embodiment, a valve mechanism is also included, and the valve mechanism is arranged in the operation chamber 101. The invention mechanism includes a valve sleeve 13 and a valve core 14. In this embodiment, one end of the valve sleeve 13 is hinged to the bottom surface of the operation chamber 101, and the other end is provided with a buckle, and the valve sleeve 13 is fixed by buckling. A through hole for loosening the buckle is reserved on the ground of the operation chamber 101. After loosening the buckle and bending up the valve sleeve 13, the drainage tube 2 and the perfusion tube 3 can be easily installed in the valve mechanism. The valve sleeve 13 is provided with a through-tube hole for the drainage tube 2 and the perfusion tube 3 to pass through. The valve core 14 is rotatably connected in the valve sleeve 13. The valve core 14 is provided with three groups of protrusions, which are respectively used to squeeze the drainage tube 2 alone, squeeze the perfusion tube 3 alone, and squeeze the drainage tube 2 and the drainage tube 2 at the same time when the valve core 14 rotates to different angles. There is also a vacancy on the valve core 14, and the vacancy is used to release the drainage tube 2 and the perfusion tube 3 at the same time. By rotating the valve core 14, the drainage tube 2 and the perfusion tube 3 can be opened at the same time, the drainage tube 2 can be closed alone, the perfusion tube 3 can be closed alone, or the drainage tube 2 and the drainage tube 2 can be closed at the same time. An angle sensor for sensing the rotation angle of the valve core 14 is also provided at the end of the valve core 14, and the angle sensor is connected to the control system signal. The angle sensor identifies whether the drainage tube 2 and the perfusion tube 3 are opened at the same time, the drainage tube 2 is closed alone, the perfusion tube 3 is closed alone, or the drainage tube 2 and the drainage tube 2 are closed at the same time. After the control system obtains the above information, it can prevent the perfusion part or the liquid supply part from continuing to perfuse when the perfusion tube 3 is closed, so as to avoid tube bursting.

[0041] The above are only embodiments of the present invention. The invention is not limited to the fields involved in this implementation case. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field to which the invention belongs before the application date or the priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. A perfusion drainage system with pressure and flow monitoring and control functions, characterized in that: Including piping system and control platform: Tubing system, including drainage and irrigation tubes; Control platform, including drainage unit, perfusion unit and control system: The drainage part includes a drainage mechanism and a drainage control mechanism, the drainage tube is connected to the drainage mechanism, the drainage mechanism is used to drive the fluid flow in the drainage tube, the drainage control mechanism includes a drainage drive device, a first flow meter and a first pressure gauge, and the drainage drive device drives the drainage control mechanism; The perfusion part includes a perfusion mechanism and a perfusion control mechanism, the perfusion tube is connected to the perfusion mechanism, the perfusion mechanism is used to drive the fluid in the perfusion tube to flow in the opposite direction of the drainage direction, the perfusion control mechanism includes a perfusion drive device, a second flow meter and a second pressure gauge, and the perfusion drive device drives the perfusion control mechanism; The control system is connected with the drainage driving device, the perfusion driving device, the first flow meter, the second flow meter, the first pressure gauge and the second pressure gauge by signal.

2. The perfusion drainage system with pressure and flow monitoring and control functions according to claim 1, characterized in that: It also includes a liquid supply part, which is used to contain the perfusion liquid during perfusion when connected with the perfusion tube.

3. The perfusion drainage system with pressure and flow monitoring and control functions according to claim 1, characterized in that: It also includes a body, a control platform is installed in the body, the body includes an operation panel, a display screen and an operation compartment, the control system is integrated in the operation panel compartment, and the drainage part and the perfusion part are installed in the operation compartment.

4. The perfusion drainage system with pressure and flow monitoring and control functions according to claim 3, characterized in that: The perfusion mechanism and the drainage mechanism are integrated: they include a frame, a groove is circumferentially arranged on the outer edge of the frame, a plurality of balls are arranged in the groove, a helix is ​​arranged on one side of the frame, a spiral groove is opened on the helix and cooperates with the balls, a spiral driving device for driving the helix to rotate axially is connected to the helix, pressure covers are respectively arranged on both sides of the helix, and the pressure covers are slidably connected to the operating chamber; the perfusion driving device and the drainage driving device both include a driver and a wedge, the working end of the driver makes reciprocating motion, and the wedge is installed on the working end of the driver.

5. The perfusion drainage system with pressure and flow monitoring and control functions according to claim 2, characterized in that: The liquid supply part includes a liquid supply driver, a containing barrel and a pressing plate. The pressing plate is slidably connected in the containing barrel. The containing barrel is provided with a liquid outlet. The working end of the liquid supply driver is connected to the pressing plate and enables the pressing plate to reciprocate in the containing barrel.

6. The perfusion drainage system with pressure and flow monitoring and control functions according to claim 4, characterized in that: The spiral drive device comprises a speed change mechanism and a motor. The speed change mechanism comprises a worm gear mechanism. The worm gear is arranged in the middle of the spiral body and is coaxially connected with the spiral body. The worm gear is connected to the output end of the motor.

7. The perfusion and drainage system with pressure and flow monitoring and control functions according to claim 6, characterized in that: The drainage tube and the perfusion tube are arranged side by side and in a Y shape.

8. The perfusion drainage system with pressure and flow monitoring and control functions according to claim 7, characterized in that: It also includes an alarm module, which is integrated in the control system. After the flow or pressure threshold is set through the operation panel, the control system calculates the cumulative flow or real-time pressure based on the second flow meter and the second pressure gauge. When the cumulative flow is greater than the flow threshold or the real-time pressure is greater than the pressure threshold, the alarm module sends an alarm message to the outside world.

9. The perfusion drainage system with pressure and flow monitoring and control functions according to claim 1, characterized in that: The invention also includes a valve mechanism, which includes a valve sleeve and a valve core. The valve sleeve is provided with a tube-penetrating hole for the drainage tube and the perfusion tube to pass through. The valve core is rotatably connected in the valve sleeve. Three groups of protrusions are provided on the valve core, which are respectively used to squeeze the drainage tube alone, squeeze the perfusion tube alone, and squeeze the drainage tube and the drainage tube at the same time. There is also a gap on the valve core, which is used to release the drainage tube and the perfusion tube at the same time.

10. The perfusion drainage system with pressure and flow monitoring and control functions according to claim 1, characterized in that: An angle sensor for sensing the rotation angle of the valve core is also provided at the end of the valve core, and the angle sensor is connected to the control system signal.

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