Multilayer body, multilayer hollow body, and catheter with multilayer hollow body

Patent metadata

Field	Value
Publication number	US-2018104440-A1
Application number	US-201715651491-A
Country	US
Kind code	A1
Filing date	Jul 17, 2017
Priority date	Oct 13, 2016
Publication date	Apr 19, 2018
Grant date	—

Abstract

A multilayer body, a multilayer hollow body, and a catheter with a multilayer hollow body each have improved torque transmissibility to one end when the other end is rotated rightward or leftward. The multilayer hollow body includes a single-strand hollow body that is formed by winding one element wire, an inner multi-strand hollow body that is disposed adjacently to an inner periphery of the single-strand hollow body and is formed by winding a plurality of element wires in an opposite direction from the single-strand hollow body, and an outer multi-strand hollow body that is disposed adjacently to an outer periphery of the single-strand hollow body 7 and is formed by winding a plurality of element wires in an opposite direction from the single-strand hollow body.

First claim

What is claimed is:

1 . A multilayer body comprising:
a single-strand hollow body that is a coil body formed by winding only one element wire; an inner multi-strand hollow body that is disposed adjacently to an inner periphery of the single-strand hollow body and that is a coil body formed by winding a plurality of element wires in an opposite direction from the single-strand hollow body; and an outer multi-strand hollow body that is disposed adjacently to an outer periphery of the single-strand hollow body and that is a coil body formed by winding a plurality of element wires in an opposite direction from the single-strand hollow body.

2 . The multilayer body according to claim 1 , wherein a twisting angle of the single-strand hollow body is larger than a twisting angle of the inner multi-strand hollow body and a twisting angle of the outer multi-strand hollow body.

3 . The multilayer body according to claim 1 , wherein a lumen defined by an inner periphery of the inner multi-strand hollow body does not contain any solid structure.

4 . The multilayer body according to claim 3 , wherein a twisting angle of the single-strand hollow body is larger than a twisting angle of the inner multi-strand hollow body and a twisting angle of the outer multi-strand hollow body.

5 . The multilayer body according to claim 1 , further comprising:
a solid structure that is disposed within a lumen defined by an inner periphery of the inner multi-strand hollow body, the solid structure extending in cross section from a center of the lumen to the inner periphery of the inner multi-strand hollow body.

6 . The multilayer body according to claim 5 , wherein the solid structure is an element wire.

7 . The multilayer body according to claim 5 , wherein a twisting angle of the single-strand hollow body is larger than a twisting angle of the inner multi-strand hollow body and a twisting angle of the outer multi-strand hollow body.

8 . A catheter, comprising:
the multilayer body according to claim 3 ; a distal end tip that is connected to a distal end of the multilayer body; and a connector that is connected to a proximal end of the multilayer body.

9 . The catheter according to claim 8 , wherein a twisting angle of the single-strand hollow body is larger than a twisting angle of the inner multi-strand hollow body and a twisting angle of the outer multi-strand hollow body.

10 . A catheter comprising:
an inner layer; the multilayer body according to claim 3 disposed on an outer periphery of the inner layer; an outer layer that covers the inner layer and the multilayer body; a distal end tip that is connected to a distal end of the inner layer and a distal end of the outer layer, wherein a distal end of the multilayer body protrudes into the distal end tip; and a connector that is connected to a proximal end of the inner layer, a proximal end of the outer layer, and a proximal end of the multilayer body.

11 . The catheter according to claim 10 , wherein a twisting angle of the single-strand hollow body is larger than a twisting angle of the inner multi-strand hollow body and a twisting angle of the outer multi-strand hollow body.

Assignees

• Asahi Intecc Co Ltd

Inventors

• Hanaoka Atsuhiro

Classifications

• A61M25/0045 Primary

  multi-layered, e.g. coated (coating materials A61L29/08) · CPC title

• A61M25/0069

  Tip not integral with tube · CPC title

• A61M25/0105

  Steering means as part of the catheter or advancing means; Markers for positioning (systems for detection of markers A61B) · CPC title

• A61M25/0068

  Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure · CPC title

• A61M39/10

  Tube connectors; Tube couplings {(A61M39/02 takes precedence; connecting needles to syringes or hubs A61M5/34; connecting catheter tubes to hubs A61M25/0014)} · CPC title