# US 2022/0031383 A1 · Cautery puncture needle

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- Number: US 2022/0031383 A1
- Document ID: US20220031383A1
- Status: Published application
- Kind: A1
- Application number: 17/278,906
- Filed: 2019-07-11
- Published: 2022-02-03
- Earliest claimed: 2018-09-28
- Assignees: Yokowo Co., Ltd.
- Applicants: Yokowo Co., Ltd.
- Inventors: Koichi SAKAI; Koki YOSHIDA
- Web page: https://patentgrep.com/patent/US20220031383A1

## CPC

- A61B 18/1477: {Needle-like probes}
- A61B 17/3478: {Endoscopic needles, e.g. for infusion (biopsy needles A61B10/0233; catheters with injection needles A61M25/0067)}
- A61B 2018/00357: {Endocardium}
- A61B 2018/00595: {Cauterization}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A cautery puncture needle includes a metal hollow pipe having a hollow portion communicating in a longitudinal direction; and a distal end electrode portion through which a high-frequency current is to be passed, the distal end electrode portion integrally installed at a distal end of the hollow pipe, wherein a hole communicating with the hollow portion is formed at a side surface of the distal end electrode portion.

## Claims

### Claim 1

A cautery puncture needle comprising:
a metal hollow pipe having a hollow portion communicating in a longitudinal direction; and
a distal end electrode portion through which a high-frequency current is to be passed, the distal end electrode portion integrally installed at a distal end of the hollow pipe, wherein
a hole communicating with the hollow portion is formed at a side surface of the distal end electrode portion.

### Claim 2 (depends on 1)

The cautery puncture needle according to claim 1, wherein an insertion distal end of the distal end electrode portion has a semi-ellipsoidal shape.

### Claim 3 (depends on 2)

The cautery puncture needle according to claim 2, wherein the distal end electrode portion has an outer diameter of 0.4 to 0.9 mm.

### Claim 4 (depends on 1)

The cautery puncture needle according to claim 1, wherein an opening of the hole has an oval shape or an elliptical shape extending in a longitudinal direction.

### Claim 5 (depends on 2)

The cautery puncture needle according to claim 2, wherein an opening of the hole has an oval shape or an elliptical shape extending in a longitudinal direction.

### Claim 6 (depends on 3)

The cautery puncture needle according to claim 3, wherein an opening of the hole has an oval shape or an elliptical shape extending in a longitudinal direction.