Continuous blood purification device

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a continuous blood purification device, which comprises a filtering part, which comprises a blood guide filter tube, a blood filter blood guide tube, a filtering pump, a blood filter, a blood filter blood return tube and a blood return filter tube which are arranged on one side; the connecting part comprises a hose, a first connecting port, a measuring port and a second connecting port; the first connecting port and the second connecting port are located at the two ends of the hose respectively. The measuring port is connected in series in the hose; the hose is simultaneously communicated with the blood guide filter tube and the blood guide tube of the blood filter through the first connecting port; the hose is simultaneously communicated with the blood filter blood return tube and the blood return filter tube through the second connecting port; the control part comprises a voltage measuring device and a controller which are connected through a wire; the pressure measuring device is detachably connected with the measuring port; the controller is arranged outside the hose in a sleeving mode and located between the measuring port and the second connecting port. A limiter is arranged in the controller; and the limiter can selectively clamp the hose.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a continuous blood purification device. Background Art

[0002] Continuous blood purification is a new blood purification method developed. It is a continuous blood purification therapy for 24 hours or nearly 24 hours every day, replacing the damaged kidney function. It is one of the most commonly used blood purification techniques in the rescue of critically ill patients. Imitating the filtration principle of the glomerulus, it achieves the purpose of removing solutes through two methods, namely convection and diffusion. Arterial blood or venous blood is introduced into a semipermeable membrane filter with good permeability. The water in the plasma and the small and medium molecular weight solutes dissolved in it are removed by convection, that is, by the pressure gradient on both sides of the semipermeable membrane to achieve the purpose of removing water and solutes. Substances smaller than the pores of the filtration membrane are filtered out, and at the same time, the substances needed by the body are input into the body in the form of replacement fluid to maintain the stability of the internal environment.

[0003] During the continuous blood purification treatment process, the normal operation of the machine is the key to the smooth progress of the treatment, and the machine's monitoring system can ensure the safety of the patient during the treatment process. When an abnormal state occurs during the treatment process, the machine will prompt the medical staff through an alarm. However, the frequent alarm of the machine interrupts the patient's treatment process, the blood pump stops running, the blood stays outside the patient's body, and the risk of blood coagulation events increases, seriously threatening the patient's life in severe cases.

[0004] The main reasons for the alarm in continuous blood purification mainly include: pressure alarm, balance alarm, air bubble alarm, blood leakage alarm, etc. Among all the alarms, the proportion of pressure alarm is the highest. Among them, the main reason for the pressure alarm is insufficient blood flow. Therefore, it is particularly important to prevent the alarm in continuous blood purification, especially the alarm of poor blood drawing at the blood drawing end.

[0005] The present invention aims at the above problems and provides a continuous blood purification device. Summary of the Invention

[0006] In order to overcome the problems raised in the background art, the present invention provides a continuous blood purification device.

[0007] A continuous blood purification device includes: A filtering part, including a blood drawing filter tube, a blood filter machine blood drawing tube, a filtering pump, a blood filter machine, a blood filter machine blood return tube and a blood return filter tube; one end of the filtering pump is connected to the blood drawing filter tube through the blood filter machine blood drawing tube, and the other end is connected to the blood filter machine through a catheter; the end of the blood filter machine far from the filtering pump is connected to the blood return filter tube through the blood filter machine blood return tube; The connecting part includes a hose, a first connection port, a measurement port and a second connection port; the first connection port and the second connection port are respectively located at both ends of the hose; the measurement port is connected in series inside the hose; the hose is simultaneously connected to the blood extraction filter tube and the blood filter machine blood extraction tube through the first connection port; the hose is simultaneously connected to the blood filter machine return blood tube and the blood return filter tube through the second connection port; The control part includes a pressure gauge and a controller connected by a wire; the pressure gauge is detachably connected to the measurement port; the controller is sleeved outside the hose and is located between the measurement port and the second connection port; a limiter is provided inside the controller; the limiter can selectively clamp the hose.

[0008] Furthermore, the connecting part further includes a first auxiliary port; the first auxiliary port is connected in series on the hose; the first auxiliary port is located between the first connection port and the measurement port.

[0009] Preferably, the filtering part includes a first pump-in device; the first connection port is detachably connected to the first pump-in device.

[0010] Preferably, the first pump-in device includes a first pump-in tube, a first liquid pump, and a first pump-in wire; one end of the first liquid pump is connected to the first auxiliary port through the first pump-in tube, and the other end is connected to the controller through the first pump-in wire.

[0011] Preferably; a first pump-in joint is provided at the end of the first pump-in wire away from the first liquid pump; a first pump-in interface is provided on the controller; the first pump-in joint and the first pump-in interface are detachably connected.

[0012] Preferably, the first auxiliary port is a three-way valve.

[0013] Furthermore, the connecting part further includes a second auxiliary port; the second auxiliary port is connected in series on the hose; the second auxiliary port is located between the second connection port and the measurement port.

[0014] Preferably, the filtering part includes a second pump-in device; the second connection port is detachably connected to the second pump-in device.

[0015] Preferably, the second pump-in device includes a second pump-in tube, a second liquid pump, and a second pump-in wire; one end of the second liquid pump is connected to the second auxiliary port through the second pump-in tube, and the other end is connected to the controller through the second pump-in wire.

[0016] Preferably; a second pump-in joint is provided at the end of the second pump-in wire away from the second liquid pump; a second pump-in interface is provided on the controller; the second pump-in joint and the second pump-in interface are detachably connected.

[0017] Preferably, the second auxiliary port is a three-way valve.

[0018] Furthermore, the controller includes a housing and a limiting member; the housing and the limiting member are detachably connected; a first installation groove is provided on one side of the housing facing the limiting member; a second installation groove is provided on one side of the limiting member facing the housing; when the limiting member is installed on the housing, the first installation groove and the second installation groove are spliced into a channel.

[0019] Preferably, the limiter is located inside the housing.

[0020] Preferably, the hose passes through the controller via the channel.

[0021] Furthermore, the controller further includes a display and a button; the display and the button are both arranged on the side wall of the housing.

[0022] Preferably, the button includes one or more of a power-on button, a reset button, and a control button.

[0023] Preferably, the controller further includes an alarm; the alarm is arranged on the side wall of the housing.

[0024] Preferably, the button further includes a mute button.

[0025] Furthermore, the pressure gauge includes a pressure meter, a pressure measurement port, and a pressure measurement wire; the pressure meter is communicated with the measurement port through the pressure measurement port; the pressure meter is connected to the controller through the pressure measurement wire.

[0026] Preferably, a pressure measurement interface is provided on the housing; a pressure measurement joint is provided at one end of the pressure measurement wire away from the pressure meter; the pressure measurement joint is detachably connected to the pressure measurement interface.

[0027] Furthermore, a power interface is provided on the housing.

[0028] Furthermore, the first connection port, the measurement port, and the second connection port are all three-way valves.

[0029] Furthermore, the limiter includes a pressing block, a push rod, and a motor; the motor drives the push rod to drive the pressing block to move.

[0030] Preferably, the moving direction of the push rod is perpendicular to the axis of the channel.

[0031] Furthermore, a liquid inlet pipe and a liquid discharge pipe are provided on the blood filter.

[0032] Advantages of the present invention: 1. When in use, connect the first connection port to the blood extraction filter tube and the blood extraction tube of the blood filter machine, and connect the second connection port to the blood return filter tube and the blood return tube of the blood filter machine. At this time, the measurement port is located between the first connection port and the control unit. Connect the blood pressure monitor to the measurement port, and the blood flow rate information can be obtained by measuring the blood pressure at the blood extraction end. When the blood flow rate is sufficient, the restrictor clamps the hose. When the blood pressure monitor detects that the blood flow rate is insufficient, the restrictor releases the hose, allowing the filtered blood to flow through the hose again to the blood extraction end of the blood filter machine and enter the interior of the blood filter machine, preventing the blood filter machine from stopping, maintaining the continuity of treatment, avoiding interruption during the treatment process, reducing the risk of extracorporeal coagulation, improving the treatment efficiency, and relatively reducing the nursing workload.

[0033] 2. When the blood pressure monitor detects that the blood flow rate is insufficient, the control unit issues an alarm to prompt the medical staff to come and handle it.

[0034] 3. Use the first pump and the second pump to inject anticoagulant drugs or physiological saline into the hose through the first auxiliary port and the second auxiliary port respectively. While flushing the hose, it further prevents blood coagulation. Description of the Drawings

[0035] Figure 1 It is a perspective view of a continuous blood purification device for implementing the present invention; Figure 2 It is a top view of a continuous blood purification device for implementing the present invention; Figure 3 It is a front view of a controller for implementing the present invention; Figure 4 For Figure 3 The sectional view taken along the line A-A of; Figure 5 It is a rear view of a controller for implementing the present invention; Figure 6 It is a perspective view of a blood pressure monitor for implementing the present invention; Figure 7 It is a perspective view of another continuous blood purification device for implementing the present invention; Figure 8 It is a top view of another continuous blood purification device for implementing the present invention; Figure 9 It is a rear view of another controller for implementing the present invention; Figure 10 It is a perspective view of a pump for implementing the present invention; In the figure, 1 is the connecting part; 2 is the control part; 3 is the filtering part; 4 is the first pump-in device; 11 is the first connection port; 12 is the measurement port; 13 is the second connection port; 14 is the first auxiliary port; 15 is the second auxiliary port; 21 is the pressure gauge; 22 is the controller; 23 is the limiter; 24 is the power interface; 25 is the pump-in interface; 31 is the blood-drawing filter tube; 32 is the blood filter machine blood-drawing tube; 33 is the filtering pump; 34 is the blood filter machine; 35 is the blood filter machine return blood tube; 36 is the return blood filter tube; 41 is the first pump-in tube; 42 is the first liquid pump; 43 is the first pump-in wire; 431 is the first pump-in connector; 211 is the pressure meter; 212 is the pressure measurement connector; 213 is the pressure measurement port; 214 is the pressure measurement wire; 221 is the display; 222 is the alarm; 223 is the pressure measurement interface; 224 is the reset key; 225 is the mute key; 226 is the control key; 227 is the housing; 228 is the limiting part; 229 is the power-on key; 231 is the pressing block; 232 is the push rod; 233 is the motor; 341 is the liquid inlet tube; 342 is the liquid discharge tube. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings 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. The present invention can also be implemented or applied through other different specific implementation manners. Without conflict, the features in the following embodiments and the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0039] The present invention provides a blood purification device which, when the blood drawing pressure at the blood drawing end reaches a certain pressure during the treatment process, automatically connects a hose and circulates to prevent the filtration pump from stopping, relieve the problem of insufficient blood drawing, and reduce the occurrence of coagulation events.

[0040] Embodiment 1

[0041] As Figures 1-6 shown, a continuous blood purification device includes: A filtration section 3, including a blood drawing filter tube 31, a blood filter machine blood drawing tube 32, a filtration pump 33, a blood filter machine 34, a blood filter machine blood return tube 35 and a blood return filter tube 36; one end of the filtration pump 33 is connected to the blood drawing filter tube 31 through the blood filter machine blood drawing tube 32, and the other end is connected to the blood filter machine 34 through a catheter; the end of the blood filter machine 34 away from the filtration pump 33 is connected to the blood return filter tube 36 through the blood filter machine blood return tube 35; A connection section 1, including a hose, a first connection port 11, a measurement port 12 and a second connection port 13; the first connection port 11 and the second connection port 13 are respectively located at both ends of the hose; the measurement port 12 is connected in series inside the hose; the hose is connected to both the blood drawing filter tube 31 and the blood filter machine blood drawing tube 32 through the first connection port 11; the hose is connected to both the blood filter machine blood return tube 35 and the blood return filter tube 36 through the second connection port 13; A control section 2, including a pressure gauge 21 and a controller 22 connected by a wire; the pressure gauge 21 is detachably connected to the measurement port 12; the controller 22 is sleeved outside the hose and is located between the measurement port 12 and the second connection port 13; a restrictor 23 is provided inside the controller 22; the restrictor 23 can selectively clamp the hose.

[0042] During use, the blood drawing filter tube 31 and the blood return filter tube 36 are inserted into the patient's blood vessels, so that the patient's blood enters the filtration section 3 through the blood drawing filter tube 31, and the blood filtered by the blood filter machine 34 returns to the patient's blood vessels through the blood return filter tube 36.

[0043] Specifically, the first connection port 11, the measurement port 12 and the second connection port 13 are all three-way valves. One end of the first connection port 11 and the second connection port 13 is connected to the hose. Both ports of the measurement port 12 are connected to the hose, and the third port is detachably connected to the pressure gauge 21.

[0044] When in use, first pre-rinse the connecting part 1 with normal saline, and then connect the first connection port 11 to the blood drawing end of the blood filtration tube and the blood drawing end of the blood filter 34, and connect the second connection port 13 to the blood return end of the blood filtration tube and the blood return end of the blood filter 34. Then, sleeved the control part 2 outside the hose, and keep the control part 2 located between the measurement port 12 and the second connection port 13. At this time, the measurement port 12 is located between the first connection port 11 and the control part 2. Connect the blood pressure monitor 21 to the measurement port 12, and the blood flow rate information can be obtained by measuring the blood pressure at the blood drawing end.

[0045] The measurement port 12 is located between the first connection port 11 and the control part 2. Connect the blood pressure monitor 21 to the measurement port 12, and the blood flow rate information can be obtained by measuring the blood pressure at the blood drawing end. When the blood flow rate is sufficient, the limiter 23 clamps the hose. When the blood pressure monitor 21 detects that the blood flow rate is insufficient, the limiter 23 releases the hose, so that the filtered blood flows through the hose again to the blood drawing end of the blood filter 34 and enters the interior of the blood filter 34, preventing the blood filter 34 from stopping, maintaining the continuity of the treatment, avoiding the interruption of the treatment process, reducing the risk of extracorporeal coagulation, improving the treatment efficiency, and relatively reducing the nursing workload.

[0046] In some embodiments of the present application, the controller 22 includes a housing 227 and a limiting member 228; the housing 227 and the limiting member 228 are detachably connected; a first installation groove is provided on one side of the housing 227 facing the limiting member 228; a second installation groove is provided on one side of the limiting member 228 facing the housing 227; when the limiting member 228 is installed on the housing 227, the first installation groove and the second installation groove are spliced into a channel.

[0047] The limiter 23 is located inside the housing 227. When in use, pass the hose through the controller 22 through the channel, and at this time the limiter 23 is facing the hose.

[0048] In the illustrative embodiment of the present application, the limiter 23 includes a pressing block 231, a push rod 232 and a motor 233. The motor 233 drives the push rod 232 to drive the pressing block 231 to move. The moving direction of the push rod 232 is perpendicular to the axis of the channel, so as to ensure that the pressing block 231 can completely clamp the hose under the drive of the motor 233.

[0049] Specifically, the push rod 232 is a screw rod; the pressing block 231 is rotatably connected to the push rod 232, and the rotation of the motor 233 drives the push rod 232 to move along its own axis.

[0050] Further, the controller 22 further includes a display 221 and a key; both the display 221 and the key are arranged on the side wall of the housing 227. The attitude of the controller 22 can be adjusted through the key.

[0051] Specifically, the buttons include one or more of a power-on button 229, a reset button 224, and a control button 226. The power-on button 229 can turn on or off the controller 22. The reset button 224 can drive the limiter 23 to reset. The control button 226 can adjust the critical value of the alarm.

[0052] In some examples of the present application, the controller 22 further includes an alarm 222; the alarm 222 is disposed on the side wall of the housing 227. When the blood flow rate is detected to be insufficient by the blood pressure monitor 21, the control unit 2 drives the alarm 222 to give an alarm to prompt the medical staff to come and handle it.

[0053] Specifically, the alarm 222 gives an alarm by means of sound, light, etc.

[0054] Preferably, the button further includes a silencing button 225. The silencing button 225 can cancel the alarm of the alarm 222.

[0055] In a specific example of the present application, the blood pressure monitor 21 includes a pressure gauge 211, a pressure measurement port 213, and a pressure measurement wire 214. When in use, the pressure gauge 211 is connected to the measurement port 12 through the pressure measurement port 213; the pressure gauge 211 is connected to the controller 22 through the pressure measurement wire 214. At this time, the pressure gauge 211 can sense the pressure of the blood extraction filter tube 31, thereby measuring the blood extraction volume, and transmitting the blood extraction volume data to the inside of the controller 22 through the pressure measurement wire 214.

[0056] Preferably, a pressure measurement interface 223 is provided on the housing 227; a pressure measurement joint 212 is provided at one end of the pressure measurement wire 214 away from the pressure gauge 211; the pressure measurement joint 212 is detachably connected to the pressure measurement interface 223.

[0057] Further, a power interface 24 is provided on the housing 227. When in use, inserting the power cord into the inside of the power interface 24 can provide energy for the controller 22 and the blood pressure monitor 21.

[0058] In the illustrative embodiment of the present application, a liquid inlet pipe 341 and a liquid discharge pipe 342 are provided on the blood filter machine 34. Clean dialysis fluid enters the blood filter machine 34 through the liquid inlet pipe 341, and the used dialysis fluid leaves the blood filter machine 34 through the liquid discharge pipe 342.

[0059] Preferably, the direction in which the dialysis fluid enters the blood filter machine 34 is opposite to the direction in which the blood enters the blood filter machine 34.

[0060] The operating principle of this embodiment: When the pressure gauge 211 monitors that the internal pressure of the blood drawing filter tube 31 is normal, that is, the blood drawing volume is within the normal range. At this time, the restrictor 23 clamps the hose, and the patient's blood sequentially passes through the blood drawing filter tube 31, the blood filter machine blood drawing tube 32, and the filtration pump 33 and enters the interior of the blood filter machine 34 for filtration. The filtered blood sequentially passes through the blood filter machine return tube 35 and the blood return filter tube 36 and returns to the patient's blood vessel interior.

[0061] When the pressure gauge 211 monitors that the internal pressure of the blood drawing filter tube 31 is abnormal, that is, the blood drawing volume is lower than the normal range. At this time, the restrictor 23 loosens the hose, so that the blood filter machine blood drawing tube 32 and the blood filter machine return tube 35 are temporarily connected under the guidance of the hose. At this time, the filtered blood returns to the interior of the blood filter machine blood drawing tube 32 again through the hose for re-filtration, and the medical staff is reminded by the alarm 222. The purpose of this design is to prevent the filtration pump 33 from stopping. That is, when the blood drawing volume is low, the filtered blood is re-sucked into the interior of the blood filter machine blood drawing tube 32 to maintain the filtration pump 33 in a normal operating state and prevent blood from coagulating inside the filtration unit 3. After the medical staff handles it and the blood drawing volume returns to the normal range, the restrictor 23 can be driven to clamp the hose to restore the original filtration mode, so that the patient's blood sequentially enters the filtration unit 3 through the blood drawing filter tube 31, and the filtered blood returns to the patient's blood vessel interior through the blood return filter tube 36.

[0062] Embodiment 2

[0063] As Figures 7-10 shown, the difference between this embodiment and Embodiment 1 is that: The connecting portion 1 further includes a first auxiliary port 14; the first auxiliary port 14 is connected in series on the hose; the first auxiliary port 14 is located between the first connection port 11 and the measurement port 12; during use, liquid drugs such as anticoagulants or physiological saline can be injected through the first auxiliary port 14 to further prevent blood coagulation.

[0064] Preferably, the filtration unit 3 includes a first pump-in device 4; the first connection port 11 is detachably connected to the first pump-in device 4. The purpose of this design is: to be able to control the opening and closing of the first pump-in device 4 through the controller 22 to achieve automatic injection of liquid drugs into the hose through the first auxiliary port 14.

[0065] Specifically, the first pump-in device 4 includes a first pump-in tube 41, a first liquid pump 42, and a first pump-in wire 43; one end of the first liquid pump 42 is communicated with the first auxiliary port 14 through the first pump-in tube 41, and the other end is connected to the controller 22 through the first pump-in wire 43.

[0066] Preferably, for easy disassembly and cleaning, one end of the first pump-in wire 43 away from the first liquid pump 42 is provided with a first pump-in joint 431; the controller 22 is provided with a first pump-in interface 25; the first pump-in joint 431 and the first pump-in interface 25 are detachably connected; Preferably, the first auxiliary port 14 is a three-way valve, enabling the selective use of the first auxiliary port 14.

[0067] The connecting portion 1 further includes a second auxiliary port 15; the second auxiliary port 15 is connected in series on the hose; the second auxiliary port 15 is located between the second connection port 13 and the measurement port 12; during use, liquid drugs such as anticoagulants or physiological saline can be injected through the second auxiliary port 15 to further prevent blood coagulation.

[0068] Preferably, the filtering portion 3 includes a second pump-in device; the second connection port 13 is detachably connected to the second pump-in device. The purpose of this design is to be able to control the opening and closing of the second pump-in device through the controller 22 to automatically inject liquid drugs into the interior of the hose through the second auxiliary port 15.

[0069] Specifically, the second pump-in device includes a second pump-in tube, a second liquid pump, and a second pump-in wire; one end of the second liquid pump is communicated with the second auxiliary port 15 through the second pump-in tube, and the other end is connected to the controller 22 through the second pump-in wire.

[0070] Preferably, for easy disassembly and cleaning, a second pump-in joint is provided at one end of the second pump-in wire away from the second liquid pump; a second pump-in interface 25 is provided on the controller 22; the second pump-in joint is detachably connected to the second pump-in interface 25; Preferably, the second auxiliary port 15 is a three-way valve, enabling the selective use of the second auxiliary port 15.

[0071] Use the first pump-in device 4 and the second pump-in device to inject anticoagulant drugs or physiological saline into the interior of the hose through the first auxiliary port 14 and the second auxiliary port 15 respectively, while flushing the hose and further preventing blood coagulation.

[0072] The operating principle of this embodiment: When the pressure gauge 211 monitors that the internal pressure of the blood extraction filter tube 31 is normal, that is, the blood extraction volume is within the normal range. At this time, the restrictor 23 clamps the hose, and the patient's blood enters the filtering portion 3 through the blood extraction filter tube 31, and the filtered blood returns to the patient's blood vessel through the blood return filter tube 36.

[0073] When the manometer 211 monitors that the internal pressure of the blood extraction filter tube 31 is abnormal, that is, the blood extraction volume is lower than the normal range. At this time, the restrictor 23 loosens the hose, so that the blood extraction tube 32 of the blood filter machine and the blood return tube 35 of the blood filter machine are temporarily connected under the guidance of the hose, and the filtered blood is re-sucked into the inside of the blood extraction tube 32 of the blood filter machine to maintain the normal operation of the filtration pump 33 and prevent blood from coagulating inside the filtration unit 3. After the medical staff handle it and the blood extraction volume returns to the normal range, the first pump 4 and the second pump can respectively inject anticoagulant drugs or physiological saline into the inside of the hose through the first auxiliary port 14 and the second auxiliary port 15 to flush the hose to complete the tube sealing. Then, the restrictor 23 is driven to clamp the hose, and the original filtration mode is restored to continue filtering the patient's blood.

[0074] In the description of this specification, the descriptions with reference to terms such as "embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0075] The embodiments described in this application are only a part of the embodiments of the present invention, rather than all the embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Without conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

Claims

1. A continuous blood purification device, characterized in that: It includes: The filter part includes a blood inlet filter tube, a blood filter inlet blood tube, a filter pump, a blood filter, a blood filter return blood tube and a blood return filter tube; one end of the filter pump is connected to the blood inlet filter tube through the blood filter inlet blood tube, and the other end is connected to the blood filter through a catheter; the end of the blood filter away from the filter pump is connected to the blood return filter tube through the blood filter return blood tube; The connection part includes a hose, a first connection port, a measuring port and a second connection port; the first connection port and the second connection port are respectively located at two ends of the hose; the measuring port is connected in series inside the hose; the hose is connected to the blood inlet filter tube and the blood inlet blood tube of the blood filter at the same time through the first connection port; the hose is connected to the blood return blood tube of the blood filter and the blood return filter tube at the same time through the second connection port; The control unit includes a pressure gauge and a controller connected by a wire; the pressure gauge is detachably connected to the measuring port; the controller is sleeved on the outside of the hose and located between the measuring port and the second connecting port; a limiter is provided inside the controller; the limiter can selectively clamp the hose.

2. A continuous blood purification device according to claim 1, characterized in that: The connecting portion further comprises a first auxiliary port; the first auxiliary port is connected in series to the hose; the first auxiliary port is located between the first connecting port and the measuring port; Preferably, the filter unit includes a first pump; the first connection port is detachably connected to the first pump; Preferably, the first pumping device comprises a first pumping tube, a first liquid pump, and a first pumping wire; one end of the first liquid pump is connected to the first auxiliary port through the first pumping tube, and the other end is connected to the controller through the first pumping wire; Preferably, a first pumping connector is provided at one end of the first pumping wire away from the first liquid pump; a first pumping interface is provided on the controller; the first pumping connector is detachably connected to the first pumping interface; Preferably, the first auxiliary port is a three-way valve.

3. A continuous blood purification device according to claim 1, characterized in that: The connecting portion further comprises a second auxiliary port; the second auxiliary port is connected in series to the hose; the second auxiliary port is located between the second connecting port and the measuring port; Preferably, the filter unit includes a second pump; the second connection port is detachably connected to the second pump; Preferably, the second pumping device comprises a second pumping tube, a second liquid pump, and a second pumping wire; one end of the second liquid pump is connected to the second auxiliary port through the second pumping tube, and the other end is connected to the controller through the second pumping wire; Preferably, a second pumping connector is provided at one end of the second pumping wire away from the second liquid pump; a second pumping interface is provided on the controller; the second pumping connector is detachably connected to the second pumping interface; Preferably, the second auxiliary port is a three-way valve.

4. A continuous blood purification device according to claim 1, characterized in that: The controller comprises a housing and a stopper; the housing and the stopper are detachably connected; a first mounting groove is provided on a side of the housing facing the stopper; a second mounting groove is provided on a side of the stopper facing the housing; when the stopper is installed on the housing, the first mounting groove and the second mounting groove are spliced ​​into a channel; Preferably, the limiter is located inside the housing; Preferably, the hose passes through the controller via a channel.

5. A continuous blood purification device according to claim 4, characterized in that: The controller further comprises a display and buttons; the display and buttons are both arranged on the side wall of the housing; Preferably, the button includes one or more of a power button, a reset button, and a control button; Preferably, the controller further comprises an alarm; the alarm is arranged on the side wall of the housing; Preferably, the buttons also include a mute button.

6. A continuous blood purification device according to claim 4, characterized in that: The pressure gauge comprises a pressure gauge, a pressure measuring port and a pressure measuring wire; the pressure gauge is connected to the measuring port through the pressure measuring port; the pressure gauge is connected to the controller through the pressure measuring wire; Preferably, a pressure measuring interface is provided on the shell; a pressure measuring joint is provided at one end of the pressure measuring wire away from the pressure gauge; and the pressure measuring joint is detachably connected to the pressure measuring interface.

7. A continuous blood purification device according to claim 4, characterized in that: The shell is provided with a power interface.

8. A continuous blood purification device according to claim 4, characterized in that: The first connection port, the measuring port and the second connection port are all three-way valves.

9. A continuous blood purification device according to claim 4, characterized in that: The limiter comprises a pressing block, a push rod and a motor; the motor drives the push rod to drive the pressing block to move; Preferably, the moving direction of the push rod is perpendicular to the axis of the channel.

10. A continuous blood purification device according to claim 4, characterized in that: The blood filter is provided with a liquid inlet pipe and a liquid outlet pipe.

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