Document Type and Number:
Japanese Patent JPWO2022049688
Kind Code:
A1
Abstract:
Provided is a dilator capable of maintaining high torquability irrespective of a rotation direction. The dilator includes a distal end side coil part 10, and a proximal end side coil part 20 located at a proximal end side of the distal end side coil part 10 and having a distal end portion 20A connected to a proximal end portion 10A of the distal end side coil part 10. The distal end side coil part 10 includes a first coil 11 formed by winding a wire in a first winding direction to have a hollow shape, and a second coil 12 provided on an outer periphery of the first coil 11 and formed by winding a wire in a second winding direction being an opposite winding direction to the first winding direction. The proximal end side coil part 20 includes a third coil 21 formed by winding a wire in the second winding direction to have a hollow shape, and a fourth coil 22 provided on an outer periphery of the third coil 21 and formed by winding a wire in the first winding direction.
Application Number:
JP2022546790A
Publication Date:
March 10, 2022
Filing Date:
September 03, 2020
Export Citation:
