External protection and compression assist device for vascular access of dialysis patient

By combining a gradient decompression mechanism and an escapement rotation mechanism, a stepwise reduction in pressure during dialysis treatment is achieved, solving the limb discomfort and safety issues caused by fixed pressure in existing technologies, and improving the convenience and safety of operation.

CN122056645APending Publication Date: 2026-05-19ZHEJIANG QUHUA HOSPITAL (QUZHOU HOSPITAL OF ZHEJIANG MEDICAL HEALTH GRP)
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Patent Information

Application Number
CN202610403603.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-30
Publication Date
2026-05-19

AI Technical Summary

Technical Problem

In current dialysis treatments, the pressure of the compression device remains constant, leading to swelling, numbness, and pain in the distal extremities. Furthermore, excessively high or low pressure can cause thrombosis or subcutaneous hematoma, resulting in insufficient complexity and safety of the procedure.

Method used

An external protection and compression aid was designed, which includes a gradient pressure reduction mechanism. The pressure is reduced in a stepwise manner through gears and an escapement rotation mechanism to simulate the slow release process of manual compression. Combined with the energy storage of the spiral spring and the engagement of the escapement wheel, the pressure is automatically adjusted to ensure effective hemostasis and maintenance of the fistula vibration sensation.

Benefits of technology

This approach achieves gradient pressure changes, avoiding discomfort and thrombosis risks in distal limbs, improving the ease and safety of the procedure, ensuring effective protection of the arteriovenous fistula, and reducing the risk of subcutaneous hematoma and delayed bleeding.

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Abstract

The invention relates to the technical field of medical assistors, and discloses an external protection and compression assistor for a vascular access of a dialysis patient, the external protection and compression assistor comprises an outer protection shell, a structural groove is formed in the outer protection shell, and a gradient pressure reduction mechanism is arranged in the structural groove. According to the external protection and compression assist device for the vascular access of the dialysis patient, a pressing block is pressed to drive a rack to press downwards, kinetic energy is transmitted to a large gear and an escape wheel through a first gear, a rotating shaft and a small gear, and meanwhile energy storage is completed through a vortex curling strip; after the touch type clamping block is unlocked, the vortex curling hair strip releases energy, the continuous rotating motion is converted into intermittent stepping rotation through periodic meshing of the escapement fork and the escapement wheel, the first rack drives the pressing plate to return upwards extremely slowly in a sectional mode, it can be guaranteed that the pressure is gradually decreased in a stepped mode along with time, and therefore the effect that the pressure is gradually decreased is achieved. The operation habit of slow hand loosening during manual compression is simulated, effective hemostasis of a puncture point is ensured through initial high pressure, and the internal fistula tremor feeling is maintained through subsequent gradient pressure reduction.
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