# US 11,027,094 B2 · Tubular body and catheter having tubular body

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- Number: US 11,027,094 B2
- Document ID: US11027094B2
- Status: Granted
- Kind: B2
- Application number: 16/424,928
- Filed: 2019-05-29
- Published: 2019-09-12
- Granted: 2021-06-08
- Earliest claimed: 2017-04-06
- Assignees: Asahi Intecc Co., Ltd.
- Applicants: Asahi Intecc Co., Ltd.
- Inventors: Takeshi Kizuka
- Web page: https://patentgrep.com/patent/US11027094B2

## CPC

- A61M 25/0045: {multi-layered, e.g. coated (coating materials A61L29/08)}
- A61M 25/005: {with embedded materials for reinforcement, e.g. wires, coils, braids}
- A61M 25/00: Catheters; Hollow probes (dilators A61M29/00; {peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00} ; for measuring or testing A61B; {materials for catheters A61L29/00})
- A61M 25/0054: {with regions for increasing flexibility}
- A61M 25/0068: {Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure}
- A61M 25/0097: {characterised by the hub (tube connectors or tube couplings A61M39/10)}
- A61M 25/0069: {Tip not integral with tube}
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

A catheter having excellent flexibility in order to follow a guidewire, and that is not easily kinked even when the catheter is bent strongly. The catheter includes a catheter shaft having a hollow resin body and a coil body within the hollow resin body. The coil body is formed of a spirally wound wire, which is slidable with respect to the hollow resin body.

## Claims

### Claim 1

A tube comprising:
a hollow coil body formed of a spirally wound resin-coated wire, the resin-coated wire comprising a wire and a resin coating covering the wire, wherein:
adjacent turns of the resin-coated wire are fixed at contact portions between adjacent portions of the resin coating, and
the wire is slidable with respect to the resin coating.

### Claim 2 (depends on 1)

The tube according to claim 1, further comprising a gap between the wire and the resin coating along a length of the wire.

### Claim 3 (depends on 2)

The tube according to claim 2, wherein the gap extends along the entire length of the wire.

### Claim 4 (depends on 1)

The tube according to claim 1, wherein a proximal end of the wire is fixed to the resin coating.

### Claim 5 (depends on 2)

The tube according to claim 2, further comprising a distal gap portion distal to a distal end of the wire.

### Claim 6 (depends on 1)

A catheter comprising:
the tube according to claim 1;
a distal tip connected to a distal end of the tube; and
a connector connected to a proximal end of the tube.