Bubble sensor capable of automatically monitoring blood transfusion process and continuous blood purification system

Abstract

The utility model discloses a bubble sensor and continuous blood purification system capable of automatically monitoring blood transfusion process, including bubble monitoring assembly and cover body, bubble monitoring assembly includes shell, the interior of said shell is provided with accommodation space, the top of shell is provided with the card slot that is used for clamping the pipeline, and the cover body is provided with the card slot that is used for clamping the pipeline. A color sensor used for detecting the color of fluid in the pipeline is arranged at the clamping groove, and the cover body is hinged to the bubble monitoring assembly and can be opened or closed relative to the bubble monitoring assembly. According to the bubble sensor capable of automatically monitoring the blood transfusion process, the color sensor is integrated in the bubble monitoring assembly, the color change of liquid in a pipeline can be monitored in real time, medical workers are informed in time through a feedback system, the operation state of a blood pump is automatically adjusted, excessive normal saline is prevented from being input into a human body, and the blood transfusion process is automatically monitored. The safety and reliability of blood purification treatment are improved, and meanwhile the burden of medical staff is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a bubble sensor capable of automatically monitoring the blood transfusion process and a continuous blood purification system. Background Art

[0002] In the medical field, especially in the field of blood purification technology, the application of bubble sensors is crucial. The ultrasonic bubble sensor utilizes the principle that the acoustic impedance of ultrasonic waves is different in liquids and gases, and detects bubbles in fluids by transmitting and receiving ultrasonic signals. When the ultrasonic signal propagates in a liquid, if it encounters a bubble, reflection, scattering, and absorption will occur, resulting in a change in the signal intensity. By analyzing these signal changes, it is possible to accurately determine whether there are bubbles in the fluid and their characteristics. This technology is not only applicable to the detection of microbubbles but also enables non-destructive detection without contacting the liquid, avoiding contamination or interference with the liquid.

[0003] However, in the field of blood purification technology, especially in processes such as continuous renal replacement therapy (CRRT) and hemodialysis, existing bubble sensors still have deficiencies in specific application scenarios. For example, during the blood transfusion process, when the treatment cycle ends, other peristaltic pumps stop operating, and only the blood pump continues to work. Normal saline is input to transfuse the remaining blood in the transfusion pipeline back into the patient's body. During this process, medical staff need to closely monitor the blood transfusion situation in the pipeline to ensure that the normal saline is not over-input. However, manual monitoring has limitations in subjectivity and timeliness. Once medical staff fail to observe in time or make a wrong judgment, it may lead to over-input of normal saline, thereby triggering a series of serious complications, such as a sharp increase in blood volume, increased cardiac burden, elevated blood pressure, electrolyte imbalance, impaired renal function, edema, etc., and may even lead to life-threatening conditions such as heart failure.

[0004] Therefore, developing a bubble sensor and a continuous blood purification system capable of automatically monitoring the blood transfusion process is of great significance for improving the safety and efficiency of blood purification treatment. The system should be able to real-time monitor the blood flow situation and bubble state in the transfusion pipeline. Once an abnormal situation is detected, it immediately stops the input of normal saline and issues an alarm, thereby effectively avoiding the risk of over-input of normal saline and ensuring the life safety of patients. Content of the Utility Model

[0005] In order to solve the above problems existing in the prior art, the purpose of the present utility model is to provide a bubble sensor capable of automatically monitoring the blood transfusion process and a continuous blood purification system, which can accurately detect in real time whether there is still blood in the pipeline, prevent excessive normal saline from being input into the human body, and improve the safety and reliability of blood purification treatment.

[0006] To solve the above technical problems, the technical solution adopted by the present utility model is as follows: A bubble sensor capable of automatically monitoring the blood transfusion process, comprising:

[0007] A bubble monitoring component, including a housing, the interior of the housing having an accommodation space, the top of the housing being provided with a clamping groove for clamping a pipeline, and a color sensor for detecting the color of the fluid in the pipeline being provided at the clamping groove;

[0008] A cover body, hinged to the bubble monitoring component and capable of being opened or closed relative to the bubble monitoring component.

[0009] As a further improvement of the present utility model, an opening is provided on the outer wall of the housing and at the position of the clamping groove, and a bubble sensor is provided at the opening, and both the transmitting end and the receiving end of the bubble sensor extend outward through the opening and into the clamping groove.

[0010] As a further improvement of the present utility model, the color sensor includes a light source and a light detection element symmetrically arranged on one side of the bubble sensor, and the light source and the light detection element extend through the opening and are flush with the outer wall of the clamping groove.

[0011] As a further improvement of the present utility model, the bubble monitoring component further includes a base connected to the housing, the light source and the light detection element are respectively arranged on the base through a first fixing block, and a support block for supporting the pipeline is further arranged between the light source and the light detection element, and the central axis of the pipeline coincides with the central axis of the support block.

[0012] As a further improvement of the present utility model, a micro switch component for detecting whether a pipeline is installed in the bubble monitoring component is further arranged in the housing;

[0013] The micro switch component includes a pressing block and a micro switch, one end of the pressing block penetrates through the bottom of the clamping groove and extends outward into the clamping groove, the other end of the pressing block is in contact with the moving contact of the micro switch, and the micro switch is fixed on the base through a second fixing block;

[0014] Wherein, when the pipeline is clamped in the clamping groove, the pressing block moves in the direction close to the moving contact of the micro switch, so that the moving contact of the micro switch is connected to the fixed contact of the micro switch; when there is no pipeline in the clamping groove, the pressing block moves in the direction away from the moving contact of the micro switch, so that the moving contact of the micro switch is separated from the fixed contact of the micro switch.

[0015] As a further improvement of the present utility model, the cover body includes a top cover, a connecting block arranged at the bottom of the top cover, and a fastener arranged on the connecting block;

[0016] Wherein, when the cover body is closed, the fastener locks the cover body and the bubble monitoring component.

[0017] As a further improvement of the present utility model, the fastener includes an adjusting screw rod and a top bead connected to the tail of the adjusting screw rod. The head of the adjusting screw rod passes through a threaded hole provided on the connecting block and is threadedly connected to the connecting block. A fastening groove adapted to the top bead is provided on the outer wall of the housing, and a notch is provided at the head of the adjusting screw rod.

[0018] As a further improvement of the present utility model, a pressing column for pressing the pipeline is further provided at the bottom of the top cover.

[0019] A continuous blood purification system includes:

[0020] A bubble sensor;

[0021] An arterial side blood circuit, a filter, an exhaust chamber, and a venous side blood circuit connected in sequence. A blood pump is provided on the arterial side blood circuit. The bubble sensor is provided on the venous side blood circuit. A venous clamp is provided on the venous side blood circuit and at the rear end of the bubble sensor. The bubble sensor is electrically connected to the system host, and the bubble sensor feeds back the detected signal to the system host to control the operation of the blood pump and the venous clamp.

[0022] Compared with the prior art, the present utility model has the following beneficial effects:

[0023] A bubble sensor of the present utility model that can automatically monitor the blood transfusion process integrates a color sensor inside the bubble monitoring component to continuously monitor the color change of the liquid in the pipeline, and timely notifies medical staff through a feedback system and automatically adjusts the operation state of the blood pump, preventing excessive normal saline from being input into the human body, improving the safety and reliability of blood purification treatment, and at the same time reducing the burden on medical staff. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the overall structure of a bubble sensor of the present utility model that can automatically monitor the blood transfusion process;

[0025] Figure 2 It is a schematic side view structure diagram of a bubble sensor of the present utility model that can automatically monitor the blood transfusion process;

[0026] Figure 3 It is a schematic diagram of the cover body of a bubble sensor of the present utility model that can automatically monitor the blood transfusion process being opened;

[0027] Figure 4 It is an explosion diagram of a bubble sensor of the present utility model that can automatically monitor the blood transfusion process;

[0028] Figure 5 It is a schematic diagram of the internal structure of the housing of a bubble sensor of the present utility model that can automatically monitor the blood transfusion process;

[0029] Figure 6 Schematic diagram of the cover structure of a bubble sensor for automatically monitoring the blood transfusion process of the present utility model;

[0030] Figure 7 Block diagram of the structure of a continuous blood purification system of the present utility model. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] Figures 1 to 6 Shown is a schematic diagram of the structure of an embodiment of a bubble sensor for automatically monitoring the blood transfusion process of the present utility model, the main part of which includes a bubble monitoring component 100 and a cover body 200.

[0033] The bubble monitoring component 100 includes a housing 110 and a base 120. The housing 110 has an accommodation space inside, the bottom of the housing 110 is open, and a clamping groove 110a for clamping the blood purification equipment's blood transfusion pipeline is provided at the top of the housing 110. A color sensor 130 for detecting the color of the fluid in the pipeline is provided at the clamping groove 110a. In this embodiment, an opening 110c is provided on the outer wall of the housing 110 and at the position of the clamping groove 110a. The color sensor 130 includes a light source 130a and a light detection element 130b symmetrically arranged on one side of the bubble sensor 140. The light source 130a and the light detection element 130b pass through the opening 110c and are flush with the outer wall of the clamping groove 110a. Connecting ears 120a are provided at both ends of the base 120, and connection holes are provided on the connecting ears 120a. Through the connecting ears 120a, the base 120 is fixed to the front end of the blood purification equipment. The light source 130a and the light detection element 130b are respectively arranged on the base 120 through a first fixing block 130c.

[0034] Preferably, in this embodiment, a support block 130d for supporting the pipeline is further provided between the light source 130a and the light detection element 130b. The central axis of the pipeline coincides with the central axis of the support block 130d, so that the light source 130a and the light detection element 130b are symmetrically distributed on both sides of the clamping groove 110a, further improving the accuracy of detection. The color sensor 130 is calibrated regularly to ensure the accuracy of color measurement. In addition, the color sensor may include an ambient light compensation function to reduce the influence of ambient light changes on color measurement.

[0035] After the end of a treatment cycle, normal saline is connected to the blood return pipeline of the blood purification device, and the remaining blood in the pipeline is returned to the human body. At this time, other peristaltic pumps on the device stop running, and only the blood pump continues to run. Blood and normal saline have different absorption and reflection characteristics under light of different wavelengths. The color sensor 130 is used to capture the spectral data of the liquid in the blood return pipeline, and these data are analyzed to determine the liquid type, that is, to identify whether the blood in the pipeline has been completely returned to the human body by judging the color in the pipeline. When the color detected by the color sensor 130 is red, a red signal is sent to the control terminal, and the control terminal transmits a signal to the display to control the blood pump to continue running; when the color detected by the color sensor 130 is transparent, it means that the blood has been completely returned, and a transparent color signal is sent to the control terminal to control the blood pump to stop running to prevent too much normal saline from being pumped into the human body. The color sensor 130 monitors the color change of the liquid in the pipeline in real time, and notifies the medical staff in time through the feedback system and automatically adjusts the operating state of the blood pump. At the same time, medical staff do not need to observe with the naked eye whether there is still blood in the pipeline and whether the blood return is complete, which reduces the burden on medical staff. It should be noted that manual blood return needs to be manually clicked on the screen at the rear end of the sensor on the blood return pipeline.

[0036] Preferably, in this embodiment, an opening 110c is provided on the outer wall of the housing 110 at the position of the card slot 110a, and a bubble sensor 140 is provided at the opening 110c to detect whether there are bubbles in the blood return pipeline, ensure that no bubbles enter the patient's blood, avoid serious complications such as air embolism, and ensure the treatment safety of the patient. The transmitting end and the receiving end of the bubble sensor 140 both extend outward into the card slot 110a after passing through the opening 110c. When the pipeline is placed in the card slot 110a, the transmitting end and the receiving end of the bubble sensor 140 protruding from the opening 110c are closely attached to the outer wall of the pipeline, so as to accurately detect the bubble condition in the pipeline.

[0037] Preferably, in this embodiment, a microswitch assembly 300 for detecting whether there is an installation pipeline in the bubble monitoring assembly 100 is further provided in the housing 110. Specifically, the microswitch assembly 300 includes a pressing block 310 and a microswitch 320. One end of the pressing block 310 penetrates through the bottom of the card slot 110a and extends outward into the card slot 110a. The other end of the pressing block 310 is in contact with the moving contact of the microswitch 320. The microswitch 320 is fixed on the base 120 through a second fixing block 330. In the initial state, the top of the pressing block 310 penetrates through the opening 110c and is located in the card slot 110a. When the pipeline is clamped in the card slot 110a, the pressing block 310 moves in the direction close to the moving contact of the microswitch 320, so that the moving contact of the microswitch 320 is connected to the fixed contact of the microswitch 320. When there is no pipeline in the card slot 110a, the pressing block 310 moves in the direction away from the moving contact of the microswitch 320, so that the moving contact of the microswitch 320 is separated from the fixed contact of the microswitch 320. Thus, by driving the connection or separation of the moving contact and the fixed contact of the microswitch 320 through the pressing block 310, it is possible to quickly identify whether there is an installation pipeline in the bubble monitoring assembly 100.

[0038] The cover 200 is used to cover the top of the bubble monitoring assembly 100 and can be opened or closed relative to the bubble monitoring assembly 100, preventing the pipeline from slipping out of the card slot 110a. At the same time, it can also reduce the influence of ambient light change on the measurement of the color sensor. The cover 200 is hinged to the bubble monitoring assembly 100 through a hinge block 240 provided at the top of the bubble sensor body 100. Specifically, the cover 200 includes a top cover 210, a connecting block 220 provided at the bottom of the top cover 210, and a fastener 230 provided on the connecting block 220. The connecting block 220 is provided on the side away from the hinged section. When the cover 200 is closed, the fastener 230 locks the cover 200 to the bubble monitoring assembly 100. Specifically, the fastener 230 includes an adjusting screw 230a and a top bead 230b connected to the tail of the adjusting screw 230a. The head of the adjusting screw 230a penetrates through a threaded hole provided on the connecting block 220 and is threadedly connected to the connecting block 220. A fastening groove 110b adapted to the top bead 230b is provided on the outer wall of the housing 110. A notch is provided at the head of the adjusting screw 230a. During use, push the end of the top cover 210 connected to the connecting block 220. When the top cover 210 is parallel to the top of the housing 110, at this time the top bead 230b is located in the fastening groove 110b, and the top cover 210 is locked to the housing 110.

[0039] Preferably, in the present embodiment, in order to adjust the tightness of the fastener 230, an adjustment cover 220a is provided on the outer wall of the connection block 220 on the side close to the head of the adjustment screw 230a. When adjustment is required, the adjustment cover 220a is opened, and the notch of the head of the adjustment screw 230a can be rotated by a wrench, so as to adjust the distance between the top bead 230b and the fastening groove 110b, thereby adjusting the tightness of the fastener 230. After the adjustment is completed, the adjustment cover 220a is covered again. In addition, in order to prevent the pipeline from being bent and improve the detection accuracy, a pressing column 250 for pressing the pipeline is further provided at the bottom of the top cover 210. When the pipeline is placed in the card slot 110a, the end of the pressing column 250 fits on the outer wall of the pipeline to limit the pipeline. The bottom of the pressing column 250 is spherical to reduce damage to the pipeline. The pressing columns 250 can be provided in multiple numbers along the length directions of the card slot 110a and the pipeline according to actual needs.

[0040] As Figure 7 shown, the present invention also protects a continuous blood purification system, including a bubble sensor, an arterial side blood circuit 2, a filter 3, an exhaust chamber 4, and a venous side blood circuit 5 connected in sequence. A blood pump 6 is provided on the arterial side blood circuit 5. The bubble sensor is provided on the venous side blood circuit 5. A venous clamp 7 is provided on the venous side blood circuit 5 and at the rear end of the bubble sensor. The bubble sensor is electrically connected to the system host, and the bubble sensor feeds back the detected signal to the system host, thereby controlling the operation of the blood pump 6 and the venous clamp 7. The bubble sensor of the present invention real-time detects the change in the color of bubbles and liquid in the venous side blood circuit 5. When bubbles are detected, the control end controls the venous clamp to clamp the pipeline. When the detected color is transparent, it indicates that the blood has been completely transfused back, and a transparent color signal is sent to the control end to control the blood pump 6 to stop operating, preventing too much physiological saline from being input into the human body.

[0041] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present invention can be combined with each other in any way. The exhaustive description of these combinations is not given in this specification only for the sake of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A bubble sensor capable of automatically monitoring the blood transfusion process, characterized in that: include: A bubble monitoring assembly (100) comprises a housing (110), wherein the housing (110) has a containing space inside, a slot (110a) for clamping a pipeline is provided at the top end of the housing (110), and a color sensor (130) for detecting the color of a fluid in the pipeline is provided at the slot (110a); The cover body (200) is hinged to the bubble monitoring assembly (100) and can be opened or closed relative to the bubble monitoring assembly (100).

2. The bubble sensor capable of automatically monitoring the blood transfusion process according to claim 1, characterized in that: An opening (110c) is provided on the outer wall of the housing (110) at the card slot (110a), and a bubble sensor (140) is provided at the opening (110c); a transmitting end and a receiving end of the bubble sensor (140) both penetrate the opening (110c) and extend outwards into the card slot (110a).

3. The bubble sensor capable of automatically monitoring the blood reinfusion process according to claim 2, characterized in that: The color sensor (130) comprises a light source (130a) and a light detection element (130b) symmetrically arranged on one side of the bubble sensor (140); the light source (130a) and the light detection element (130b) penetrate the opening (110c) and are flush with the outer wall of the card slot (110a).

4. The bubble sensor capable of automatically monitoring the blood reinfusion process according to claim 3, characterized in that: The bubble monitoring assembly (100) further comprises a base (120) connected to the housing (110); the light source (130a) and the light detection element (130b) are respectively arranged on the base (120) via a first fixing block (130c); a support block (130d) for supporting a pipeline is also arranged between the light source (130a) and the light detection element (130b); the central axis of the pipeline coincides with the central axis of the support block (130d).

5. The bubble sensor capable of automatically monitoring the blood reinfusion process according to claim 4, characterized in that: The housing (110) is also provided with a micro switch assembly (300) for detecting whether there is an installed pipeline in the bubble monitoring assembly (100); The micro switch assembly (300) comprises a pressing block (310) and a micro switch (320); one end of the pressing block (310) penetrates the bottom of the card slot (110a) and extends outward into the card slot (110a); the other end of the pressing block (310) contacts the moving contact of the micro switch (320); and the micro switch (320) is fixed to the base (120) via a second fixing block (330); When the pipeline is clamped in the slot (110a), the pressing block (310) moves in a direction close to the moving contact of the micro switch (320), so that the moving contact of the micro switch (320) is connected with the fixed contact of the micro switch (320); when there is no pipeline in the slot (110a), the pressing block (310) moves in a direction away from the moving contact of the micro switch (320), so that the moving contact of the micro switch (320) is separated from the fixed contact of the micro switch (320).

6. The bubble sensor capable of automatically monitoring the blood reinfusion process according to any one of claims 1 to 5, characterized in that: The cover body (200) comprises a top cover (210), a connecting block (220) arranged at the bottom of the top cover (210), and a fastener (230) arranged on the connecting block (220); Wherein, when the cover body (200) is closed, the fastener (230) locks the cover body (200) and the bubble monitoring assembly (100).

7. The bubble sensor capable of automatically monitoring the blood reinfusion process according to claim 6, characterized in that: The fastener (230) comprises an adjusting screw (230a) and a top ball (230b) connected to the tail of the adjusting screw (230a); the head of the adjusting screw (230a) passes through a threaded hole (220b) provided on the connecting block (220) and is threadedly connected to the connecting block (220); a fastening groove (110b) adapted to the top ball (230b) is provided on the outer wall of the housing (110); and a notch is provided on the head of the adjusting screw (230a).

8. The bubble sensor capable of automatically monitoring the blood reinfusion process according to claim 6, characterized in that: A compression column (250) for compressing the pipeline is also provided at the bottom of the top cover (210).

9. The bubble sensor capable of automatically monitoring the blood reinfusion process according to claim 7, characterized in that: An adjustment cover (220a) is provided on an outer wall of one side of the connection block (220) close to the head of the adjustment screw rod (230a).

10. A continuous blood purification system, characterized in that: include: A bubble sensor capable of automatically monitoring a blood transfusion process as claimed in any one of claims 1 to 9; An arterial blood circuit (2), a filter (3), an exhaust chamber (4), and a venous blood circuit (5) are sequentially connected; the arterial blood circuit (2) is provided with a blood pump (6); the bubble sensor is provided on the venous blood circuit (5); a venous clamp (7) is provided on the venous blood circuit (5) and at the rear end of the bubble sensor; the bubble sensor is electrically connected to a system host; the bubble sensor feeds back a detected signal to the system host, thereby controlling the operation of the blood pump (6) and the venous clamp (7).

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