An arteriovenous fistula safety monitoring and early warning device
Patent Information
- Application Number
- CN202520932894.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-05-12
AI Technical Summary
In existing technologies, the monitoring of arteriovenous fistulas mainly relies on nurses' intermittent rounds, which cannot achieve continuous monitoring throughout the entire process. This leads to frequent occurrences of puncture site bleeding, hematoma caused by abnormal movement of the limb on the fistula side, and needle slippage, which affect the quality of dialysis and threaten patient safety.
This arteriovenous fistula safety monitoring and early warning device integrates three monitoring methods: passive infrared monitoring of human movement, capacitive detection of air in dialysis tubing, and conductive sensor monitoring of bleeding. It includes a main control unit, arm protection pad, airbag, and movable leakage probe to achieve real-time early warning of bleeding at the puncture site, fistula hematoma, and air embolism.
It enables highly sensitive monitoring of arteriovenous fistulas, reduces response time in critical situations, lowers the workload of medical staff, improves patient safety and comfort, and reduces the risk of medical disputes.
Smart Images
Figure CN224925142U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a hemodialysis treatment device, specifically an arteriovenous fistula safety monitoring and early warning device. Background Technology
[0002] Hemodialysis is the main treatment for patients with end-stage renal failure and critical illness. The prerequisite for hemodialysis treatment is to establish a stable vascular access for dialysis patients. Arteriovenous fistulas have become the first choice for vascular access for the vast majority of dialysis patients due to their advantages such as ease of puncture and long service life.
[0003] Arteriovenous fistulas (AVFs) can experience bleeding at the puncture site during dialysis. Abnormal movement of the limb on the fistula side during treatment can lead to AVF hematoma, AVF needle slippage, and other complications. These situations can cause blood loss, affect dialysis quality, and even threaten the patient's life. Currently, clinical monitoring of AVFs during dialysis relies on intermittent rounds by nurses, which is labor-intensive and cannot provide continuous monitoring throughout the entire process, making it difficult to ensure patient safety. Summary of the Invention
[0004] The technical problem to be solved by this utility model is to provide a safety monitoring and early warning device for arteriovenous fistulas with high monitoring sensitivity, timely early warning, simple structure and convenient operation.
[0005] To solve the above-mentioned technical problems, the arteriovenous fistula safety monitoring and early warning device of this utility model includes a main control device mounting layer, an arm protection pad for placing the patient's arm disposed above the main control device mounting layer, and an adjustable-height airbag disposed below the main control device mounting layer; the main control device mounting layer and the arm protection pad are equipped with monitoring devices.
[0006] The main control equipment is equipped with an internal sound alarm device and a remote control receiving and processing device, and a movable blood leakage monitoring probe is installed on the outside.
[0007] The arm protective pad is equipped with a human infrared sensor in the middle and an air monitor for the dialysis blood circuit on the outside.
[0008] The dialysis blood circuit air monitor includes a dialysis blood circuit fixing slot and an air monitoring device and a flow stop valve located next to the dialysis blood circuit fixing slot.
[0009] The arm guard is hinged to a protective cover on the side.
[0010] The airbag is equipped with a manual inflation device.
[0011] The advantages of this invention are: it uses passive infrared to monitor human movement, capacitive detection to monitor air in the dialysis tubing, and conductive sensors to monitor bleeding at the puncture site, integrating these three monitoring methods into one unit. The overall structure is simple, highly sensitive, and low-cost, significantly reducing response time in emergencies and the workload of medical staff, effectively protecting patient safety and reducing medical disputes. The airbag is height-adjustable, highly adaptable to patient posture, and provides good comfort. A protective cover is installed above the protective pad to prevent pressure on the patient's arm while providing support and insulation. Attached Figure Description
[0012] Figure 1 This is a front sectional view of the present invention; Figure 2 This is a top view of the present invention with the protective cover removed; Figure 3 This is a right view of the present invention without the protective cover; Figure 4 This is an enlarged view of the air-permeable blood circuit air monitor of this utility model. Detailed Implementation
[0013] The arteriovenous fistula safety monitoring and early warning device of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0014] As shown in the figure, the arteriovenous fistula safety monitoring and early warning device of this utility model includes a main control device mounting layer 1, an arm protection pad 2 for placing the patient's arm located above the main control device mounting layer 1, and an airbag 3 with a height adjustable and a manual inflation device 11 located below the main control device mounting layer 1.
[0015] The main control equipment mounting layer 1 houses a power supply, an audible alarm device, and a remote control receiving and processing device for receiving and processing signals from various sensors and performing control functions. A movable blood leakage monitoring probe 4 is located on the outside. This movable blood leakage monitoring probe 4 uses a conductive sensor, utilizing the conductivity of blood. The sensor is positioned in the puncture site area. When blood comes into contact with the electrode, the conductivity of the blood causes a sudden drop in resistance between the electrodes, forming a circuit. The remote control receiving and processing device receives the signal and triggers the audible alarm device to prevent arteriovenous fistula hematoma or fistula needle slippage caused by abnormal arm movement.
[0016] The arm protection pad 2 has a human infrared sensor 5 in the middle, a dialysis blood circuit air monitor 6 on one side, and a semi-circular protective cover 10 hinged to the other side to prevent the patient's arm from being compressed while providing support and heat preservation. The human infrared sensor 5 uses passive infrared monitoring. When abnormal human movement exceeds the permissible range, changes in infrared radiation intensity cause the pyroelectric material inside the sensor to generate an electric charge, which is converted into an electrical signal and transmitted to the remote control receiving and processing device, triggering an audible alarm. The dialysis blood circuit air monitor 6 uses a capacitive detection method, including a dialysis blood circuit fixing slot 7 and an air monitoring device and a stop valve 9 located next to the dialysis blood circuit fixing slot 7. In this embodiment, the air monitoring device is an air monitoring probe 8. During treatment, the dialysis blood circuit is filled with blood. Since the dielectric constant of blood is different from that of air, the presence of air will change the capacitance value. After the sensor electrode of the air monitoring probe 8, which surrounds the dialysis blood circuit, detects abnormal fluctuations in the capacitance value, the remote control receiving and processing device receives the signal and triggers the audible alarm. At the same time, the stop valve 9 pops out to block the pipeline and prevent air embolism.
[0017] In use, first place the patient's arm on the side undergoing arteriovenous fistula surgery in the middle of the arm protection pad 2, and inflate the air bag 3 to a height that is comfortable for the patient using the manual inflation device 11. Then, place the movable blood leakage monitoring probe 4 on the adhesive bandage at the puncture point and fix it with medical tape. Next, insert the arterial and venous tubes of the hemodialysis tubing into the dialysis tubing fixing slot 7 of the dialysis tubing air monitor 6. Finally, close the protective cover 10, and use the remote control device to turn on the device and perform remote operation.
[0018] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.
Claims
1. A safety monitoring and early warning device for arteriovenous fistulas, characterized in that: It includes a main control device mounting layer (1), an arm protection pad (2) for placing the patient's arm located above the main control device mounting layer (1), and an adjustable airbag (3) located below the main control device mounting layer (1); the main control device mounting layer (1) is equipped with an audible alarm device and a remote control receiving and processing device inside, and a movable blood leakage monitoring probe (4) is located on the outside; the arm protection pad (2) is equipped with a human infrared sensor probe (5) in the middle and a dialysis blood circuit air monitor (6) on the outside.
2. The arteriovenous fistula safety monitoring and early warning device according to claim 1, characterized in that: The dialysis blood circuit air monitor (6) includes a dialysis blood circuit fixing slot (7) and an air monitoring probe (8) and a stop valve (9) located next to the dialysis blood circuit fixing slot (7).
3. The arteriovenous fistula safety monitoring and early warning device according to claim 1, characterized in that: The arm protective pad (2) has a protective cover (10) hinged to its side.
4. The arteriovenous fistula safety monitoring and early warning device according to claim 1, characterized in that: The airbag (3) is equipped with a manual inflation device (11).