Patent ID: 11872383
Assignee: FORQALY MEDICAL(SHANGHAI) CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A  F | IPC A  F

Claim 0:
1. A flexible shaft structure insulating wear particles by perfusion, comprising a flexible transmission shaft (1), a proximal holder (8) being provided at one end of the flexible transmission shaft (1), and a distal holder (9) being provided at the other end of the flexible transmission shaft (1), wherein a constraint insulator and an outer sheath tube (5) are provided outside the flexible transmission shaft (1), and the constraint insulator sequentially comprises an inner constraint layer (2), an insulation layer (3) and an outer constraint layer (4) from inside to outside;
a perfusion inflow annular cavity (7) is located between the outer constraint layer (4) and the outer sheath tube (5) and between the outer constraint layer (4) and the insulation layer (3), respectively, and a static sealed inner cavity (6) is located between the inner constraint layer (2) and the insulation layer (3) and between the inner constraint layer (2) and the flexible transmission shaft (1), respectively;
the proximal holder (8) is provided with a perfusion inlet pipeline (11) communicated with the perfusion inflow annular cavity (7) and a perfusion exhaust pipeline (12) communicated with the static sealed inner cavity (6); and
the distal holder (9) is provided with a perfusion insulation cavity (10) through which the flexible transmission shaft (1) passes.