A central venous catheter function assessment system for hemodialysis

Abstract

The present invention provides a central venous catheter function assessment system for hemodialysis, comprising a catheter assessment device and a catheter assessment pipeline. The catheter assessment device includes a support seat, on which are disposed a pipeline clamp, an infrared detector, an air detector, a pressure sensor, a blood pump, a 20ml sterile bag holder, a display screen, an alarm unit, a power button, a start / stop button, an alarm reset button, a re-infusion button, a controller, a timer, and a power supply. The catheter assessment pipeline includes a 20ml sterile bag, a flexible pipeline, and a catheter connector. The 20ml sterile bag is installed in the 20ml sterile bag holder and connected to one end of the flexible pipeline. The flexible pipeline is bent and nested with the blood pump, passing through the pressure sensor, infrared detector, air detector, and pipeline clamp, and fixedly engaged. The catheter connector is connected to the other end of the flexible pipeline. The combined volume of the flexible pipeline and the catheter connector is 20ml. This application can improve the safety, operability, objectivity, and scientific nature of clinical central venous catheter function assessment for hemodialysis.

Description

Technical Field

[0001] The present invention relates to the technical field of blood purification nursing, and in particular to a central venous catheter function evaluation system for hemodialysis. Background Art

[0002] International and domestic research and analysis indicate that over 60% of hemodialysis patients undergo their first dialysis session with a central venous catheter. Proper catheter function is essential for successful hemodialysis treatment, and scientifically and objectively evaluating the function of a central venous catheter prior to use is crucial for ensuring optimal dialysis outcomes. At present, a 20ml syringe is often used in clinical practice to aspirate the dialysis catheter within 6 seconds to fill the syringe to evaluate whether the central venous catheter for dialysis is functioning well. However, the inventors of the present application have found the following disadvantages in long-term clinical use of this method: First, this method cannot visually determine whether there is thrombus in the aspirated blood. Therefore, there is a risk of thrombus entering the body when the aspirated 20ml of blood is pushed back into the patient's dialysis catheter, which poses a safety hazard; Second, clinical work is busy, and nurses often cannot meet the timing and syringe aspiration requirements at the same time when operating alone, resulting in poor operability; Third, this method is relatively subjective, and assessment errors often occur in clinical practice, resulting in patients being forced to discontinue treatment immediately due to insufficient blood flow after being on the machine. This not only increases the patient's treatment costs and increases the incidence of unplanned disembarkation, but also reduces the treatment efficacy, causing great harm to the patient's physical and mental health, and is not very objective or scientific. Summary of the Invention

[0003] In response to the technical problems of existing central venous catheter function assessment methods for hemodialysis, such as the risk of thrombus entry into the body, poor operability, and lack of objectivity and scientificity, the present invention provides a central venous catheter function assessment system for hemodialysis.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A central venous catheter function evaluation system for hemodialysis includes a catheter evaluation device and a catheter evaluation pipeline. The catheter evaluation device includes a support seat, and the support seat surface is fixedly provided with a pipeline clamp, an infrared detector, an air detector, a pressure sensor, a blood pump, a 20ml sterile bag holder, a display screen, an alarm unit, a power button, a start / stop button, an alarm reset button, and a return button. The pipeline clamp and the 20ml sterile bag holder are respectively close to the opposite sides of the support seat. A controller, a timer, and a power supply are fixedly provided in the support seat. The pipeline clamp, infrared detector, air detector, pressure sensor, blood pump, display screen, and the like are fixedly provided. , alarm unit, power button, start / stop button, alarm reset button, re-infusion button and timer are electrically connected to the controller respectively, and the power supply is used to provide electrical energy to each electrical device; the catheter evaluation pipeline includes a 20ml sterile bag, a soft pipeline and a catheter connector, the 20ml sterile bag is fixedly installed in the 20ml sterile bag holder and connected to one end of the soft pipeline, the soft pipeline is bent to fit in the blood pump nest and passes through the pressure sensor, infrared detector, air detector and pipeline clamp to fit, the catheter connector is connected to the other end of the soft pipeline and extends out of the support seat, and the total volume of the soft pipeline and the catheter connector is 20ml.

[0006] Compared to the prior art, the central venous catheter function assessment system for hemodialysis provided by the present invention is used by first connecting the catheter connector to the patient's central venous catheter for hemodialysis. The power button is then pressed, followed by the start / stop button. A controller controls the blood pump, and blood fills the assessment line within a preset 12 seconds using a timer. During this process, a pressure sensor senses the catheter pressure and displays it in real time on a display screen. When the catheter pressure exceeds a preset normal range (catheter dysfunction, effective catheter blood flow less than 200 ml / min; or arterial pressure less than -250 mmHg when the blood pump flow rate reaches 200 ml / min), the controller controls the line clamp to close, the blood pump to pause, and the alarm unit to sound and light alarms, and the display screen to indicate the catheter dysfunction. If the infrared detector detects a thrombus in the blood through infrared detection, the controller controls the line clamp to close, the blood pump to pause, and the alarm unit to sound and light alarms, and the display screen to indicate the thrombus. After medical personnel have addressed the situation, they can press the alarm reset button to resume operation. When the blood fills the 20ml sterile bag, it indicates that the suction is completed and the tube clamp is closed, the blood pump is paused, and the alarm light in the alarm unit turns green. At this time, press the reinfusion button and the blood is reinfused within 12 seconds. When the air detector detects the presence of air in the tube, the controller will control the tube clamp to clamp and the blood pump to pause. At this time, the patient's central venous catheter function evaluation for dialysis is completed. On the one hand, this system uses an infrared detector to detect whether there is a thrombus in the aspirated blood, and gives a visual prompt through the display screen when a thrombus is detected in the blood, thereby avoiding the risk of thrombus entering the body when the aspirated blood is pushed back into the patient's dialysis catheter, and has high safety; on the other hand, the timer can achieve the preset 12s timing requirement, and the controller can control the blood pump to achieve automatic aspiration accordingly, and has high operability; thirdly, on the other hand, the catheter evaluation device and the catheter evaluation pipeline complete the self-evaluation, which is highly objective and scientific, and avoids the situation in clinical practice where evaluation errors lead to the patient being forced to discontinue treatment immediately due to insufficient blood flow after being on the machine, thereby reducing the patient's treatment costs, reducing the incidence of unplanned disembarkation, and improving the treatment efficacy.

[0007] Furthermore, the alarm unit includes an indicator light and a buzzer. The indicator light is fixedly arranged on the surface of the supporting seat, and the buzzer is arranged on a side of the supporting seat close to the 20ml sterile bag holder.

[0008] Furthermore, the power supply is a rechargeable power supply, and a charging interface connected to the rechargeable power supply is provided on one side of the supporting seat close to the 20ml sterile bag holder.

[0009] Furthermore, the catheter evaluation device further includes a memory electrically connected to the controller.

[0010] Furthermore, an upper mold column is fixedly sleeved on the soft pipe, a depression is provided at the bottom of the upper mold column, a lower mold column is fixedly provided on the pressure sensor, and a protrusion is provided on the top of the lower mold column to closely contact and cooperate with the depression. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of the central venous catheter function evaluation system for hemodialysis provided by the present invention.

[0012] Figure 2 It is a structural schematic diagram of the catheter evaluation pipeline in the functional evaluation system provided by the present invention.

[0013] In the figure, 1. Catheter evaluation device; 101. Support seat; 102. Tube clamp; 103. Infrared detector; 104. Air detector; 105. Pressure sensor; 106. Blood pump; 107. 20ml sterile bag holder; 108. Display screen; 109. Power button; 110. Start / stop button; 111. Alarm reset button; 112. Return button; 113. Indicator light; 114. Buzzer; 115. Charging port; 2. Catheter evaluation pipeline; 201. 20ml sterile bag; 202. Flexible pipeline; 203. Catheter connector; 204. Upper mold column. DETAILED DESCRIPTION

[0014] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0015] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0016] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0017] Please refer to Figure 1 and Figure 2As shown, the present invention provides a central venous catheter function evaluation system for hemodialysis, including a catheter evaluation device 1 and a catheter evaluation pipeline 2. The catheter evaluation device 1 includes a support base 101, on which a pipeline clamp 102, an infrared detector 103, an air detector 104, a pressure sensor 105, a blood pump 106, a 20ml sterile bag holder 107, a display screen 108, an alarm unit, a power button 109, a start / stop button 110, an alarm reset button 111, and a return button 112 are fixedly installed. 2 is used to clamp the pipeline, the infrared detector 103 is used to detect whether there is a thrombus in the blood, the air detector 104 is used to detect whether there is air in the catheter, the pressure sensor 105 is used to sense the pressure in the catheter, and the blood pump 106 is used to suck and push back the blood. The specific product structure and working principle of the pipeline clamp 102, infrared detector 103, air detector 104, pressure sensor 105 and blood pump 106 are existing technologies well known to those skilled in the art and will not be described in detail here. The pipeline clamp 102 and 2 The 0ml sterile bag holder 107 is respectively close to the opposite sides of the support base 101, that is, the tube clamp 102 and the 20ml sterile bag holder 107 are arranged opposite to each other on the support base 101. The support base 101 is fixedly provided with a controller, a timer and a power supply (not shown in the figure). The tube clamp 102, the infrared detector 103, the air detector 104, the pressure sensor 105, the blood pump 106, the display screen 108, the alarm unit, the power button 109, the start / stop button 110, the alarm reset button 111, the return button 112 and the timer The controller is electrically connected to the infrared detector 103, the air detector 104, the pressure sensor 105, the power button 109, the start / stop button 110, the alarm reset button 111, the re-injection button 112, and the timer. The controller processes the relevant input data signals of the infrared detector 103, the air detector 104, the pressure sensor 105, the power button 109, the start / stop button 110, the alarm reset button 111, the re-injection button 112, and the timer, and controls the clamping of the tube clamp 102, the start / stop of the blood pump 106, the prompt of the display screen 108, and the alarm of the alarm unit according to the processing results. The controller can be implemented by an existing PLC controller. The power supply is used to provide power to the various electrical components.The catheter evaluation line 2 includes a 20ml sterile bag 201, a soft line 202 and a catheter connection port 202. The 20ml sterile bag 201 is fixedly installed (e.g., by a stud) in the 20ml sterile bag holder 107 and connected to one end of the soft line 202. The soft line 202 is bent and nested with the blood pump 106 and passes through the pressure sensor 105, the infrared detector 103, the air detector 104 and the line clamp 102. Detector 104 is assembled into a single structure. The catheter connector 203 connects to the other end of the flexible tubing 202 and extends out of the support base 101 to facilitate connection to a patient's central venous catheter for dialysis. The combined volume of the flexible tubing 202 and the catheter connector 203 is 20ml, which is the same as the volume of the 20ml sterile bag 201. This ensures that blood fills the catheter evaluation line 2 within the 12 seconds set by the timer when the catheter is functioning properly.

[0018] Compared to the prior art, the central venous catheter function assessment system for hemodialysis provided by the present invention is used by first connecting the catheter connector to the patient's central venous catheter for hemodialysis. The power button is then pressed, followed by the start / stop button. A controller controls the blood pump, and blood fills the assessment line within a preset 12 seconds using a timer. During this process, a pressure sensor senses the catheter pressure and displays it in real time on a display screen. When the catheter pressure exceeds a preset normal range (catheter dysfunction, effective catheter blood flow less than 200 ml / min; or arterial pressure less than -250 mmHg when the blood pump flow rate reaches 200 ml / min), the controller controls the line clamp to close, the blood pump to pause, and the alarm unit to sound and light alarms, and the display screen to indicate the catheter dysfunction. If the infrared detector detects a thrombus in the blood through infrared detection, the controller controls the line clamp to close, the blood pump to pause, and the alarm unit to sound and light alarms, and the display screen to indicate the thrombus. After medical personnel have addressed the situation, they can press the alarm reset button to resume operation. When the blood fills the 20ml sterile bag, it indicates that the suction is completed and the tube clamp is closed, the blood pump is paused, and the alarm light in the alarm unit turns green. At this time, press the reinfusion button and the blood is reinfused within 12 seconds. When the air detector detects the presence of air in the tube, the controller will control the tube clamp to clamp and the blood pump to pause. At this time, the patient's central venous catheter function evaluation for dialysis is completed. On the one hand, this system uses an infrared detector to detect whether there is a thrombus in the aspirated blood, and gives a visual prompt through the display screen when a thrombus is detected in the blood, thereby avoiding the risk of thrombus entering the body when the aspirated blood is pushed back into the patient's dialysis catheter, and has high safety; on the other hand, the timer can achieve the preset 12s timing requirement, and the controller can control the blood pump to achieve automatic aspiration accordingly, and has high operability; thirdly, on the other hand, the catheter evaluation device and the catheter evaluation pipeline complete the self-evaluation, which is highly objective and scientific, and avoids the situation in clinical practice where evaluation errors lead to the patient being forced to discontinue treatment immediately due to insufficient blood flow after being on the machine, thereby reducing the patient's treatment costs, reducing the incidence of unplanned disembarkation, and improving the treatment efficacy.

[0019] As a specific example, please refer to Figure 1 As shown, the alarm unit includes an indicator light 113 and a buzzer 114. The indicator light 113 is fixedly arranged on the surface of the supporting seat 1, and the buzzer 114 is arranged on a side of the supporting seat 1 close to the 20ml sterile bag holder 107. Thus, an audible and visual alarm can be realized by the flashing light of the indicator light 113 and the buzzing sound of the buzzer 114.

[0020] As a specific example, please refer to Figure 1As shown, the power source is a rechargeable power source such as a battery power source, and a charging interface 115 connected to the rechargeable power source is provided on one side of the supporting seat 1 close to the 20ml sterile bag holder 107, so that the rechargeable power source can be charged multiple times through the charging interface 115 to extend the use time of the system.

[0021] As a specific embodiment, the catheter evaluation device 1 also includes a memory (not shown) electrically connected to the controller, so that the controller's processing data (such as catheter pressure) and control signals (such as blood pump start and stop) can be stored and recorded through the memory, so that the system has both evaluation and recording functions.

[0022] As a specific example, please refer to Figure 1 and Figure 2 As shown, an upper mold column 204 is fixedly sleeved on the soft pipe 202, and a depression is provided at the bottom of the upper mold column 204. A lower mold column is fixedly provided on the pressure sensor 105, and a protrusion is provided on the top of the lower mold column for close contact with the depression. Therefore, the close contact between the depression and the protrusion can better detect the catheter pressure, thereby improving the sensitivity of the catheter pressure detection.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A central venous catheter function assessment system for hemodialysis, characterized in that: The invention comprises a catheter evaluation device and a catheter evaluation pipeline, wherein the catheter evaluation device comprises a supporting seat, on the surface of which a pipeline clamp, an infrared detector, an air detector, a pressure sensor, a blood pump, a 20ml sterile bag holder, a display screen, an alarm unit, a power button, a start / stop button, an alarm reset button and a return key are fixedly arranged, the pipeline clamp and the 20ml sterile bag holder are respectively close to the opposite sides of the supporting seat, a controller, a timer and a power supply are fixedly arranged in the supporting seat, the pipeline clamp, the infrared detector, the air detector, the pressure sensor, the blood pump, the display screen, the alarm unit, the power button, the start / stop button, the alarm reset button, the return key and the timer are respectively electrically connected to the controller, and the controller is fixedly provided with a power supply. The timer can achieve the preset timing requirement of 12s, and accordingly control the blood pump through the controller to achieve automatic suction, and the power supply is used to provide electrical energy; the catheter evaluation pipeline includes a 20ml sterile bag, a soft pipeline and a catheter connector, the 20ml sterile bag is fixedly installed in the 20ml sterile bag holder and connected to one end of the soft pipeline, the soft pipeline is bent and nested with the blood pump and passes through the pressure sensor, infrared detector, air detector and pipeline clamp to be fixed, the catheter connector is connected to the other end of the soft pipeline and extends out of the support seat, the total volume of the soft pipeline and the catheter connector is 20ml, and the total volume of the soft pipeline and the catheter connector is the same as the volume of the 20ml sterile bag.

2. The central venous catheter function evaluation system for hemodialysis according to claim 1, characterized in that: The alarm unit includes an indicator light and a buzzer. The indicator light is fixedly arranged on the surface of the supporting seat, and the buzzer is arranged on a side of the supporting seat close to the 20ml sterile bag holder.

3. The central venous catheter function evaluation system for hemodialysis according to claim 1, characterized in that: The power supply is a rechargeable power supply, and a charging interface connected to the rechargeable power supply is provided on one side of the supporting seat close to the 20ml sterile bag holder.

4. The central venous catheter function evaluation system for hemodialysis according to claim 1, characterized in that: The catheter evaluation device also includes a memory electrically connected to the controller.

5. The central venous catheter function evaluation system for hemodialysis according to claim 1, characterized in that: An upper mold column is fixedly sleeved on the soft pipe, a depression is provided at the bottom of the upper mold column, a lower mold column is fixedly provided on the pressure sensor, and a protrusion is provided on the top of the lower mold column to closely contact and cooperate with the depression.

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