# US 10,765,417 B2 · Medical retractor

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- Number: US 10,765,417 B2
- Document ID: US10765417B2
- Status: Granted
- Kind: B2
- Application number: 16/195,028
- Filed: 2018-11-19
- Published: 2019-03-21
- Granted: 2020-09-08
- Earliest claimed: 2014-09-13
- Assignees: Yusuke Shimizu; Yasui Corporation
- Applicants: Yusuke Shimizu; Yasui Co., Ltd.
- Inventors: Yusuke Shimizu; Satoshi Matsuta; Go Aradono
- Web page: https://patentgrep.com/patent/US10765417B2

## CPC

- A61B 17/02: for holding wounds open, e.g. retractors; Tractors
- A61B 1/06: with illuminating arrangements
- A61B 1/32: Devices for opening or enlarging the visual field, e.g. of a tube of the body
- A61B 90/30: Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
- A61B 2017/0046: {with a releasable handle; with handle and operating part separable}
- A61B 2017/00473: {Distal part, e.g. tip or head (A61B2017/00464 takes precedence)}
- A61B 2017/00734: {battery operated}
- A61B 2017/00907: {for light}
- A61B 2090/304: {using chemi-luminescent materials}
- A61B 2090/306: {using optical fibres}
- A61B 2090/308: {Lamp handles}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A medical retractor is capable of ensuring visibility in a field of operation and in the periphery of the field of operation while realizing the reduction of weight of the retractor compared to a conventional steel-made retractor. A medical retractor includes: a grip portion; and a resin functional portion made of a transparent resin and extending from the grip portion. The resin functional portion has: a trunk portion which has a proximal end thereof connected to the grip portion; and a hook-shaped portion extending in a hook shape from a distal end of the trunk portion. The resin functional portion is configured to allow the viewing of an affected part which opposedly faces a back surface of the resin functional portion from a front surface side in a see-through manner.

## Claims

### Claim 1

A medical retractor comprising:
a grip portion; and
a resin functional portion made of a transparent resin and extending from the grip portion, wherein
the resin functional portion has: a trunk portion which has a proximal end thereof connected to the grip portion; and a hook-shaped portion extending in a hook shape from a distal end of the trunk portion,
the resin functional portion is configured to allow a viewing of an affected part which opposedly faces a back surface of the resin functional portion from a front surface side in a see-through manner,
the grip portion has an accommodating space in which a light source is accommodated,
the grip portion has a hole at a distal end of the grip portion, the hole communicates with the accommodating space, and the hole is covered with a transparent flat part of a cap, the cap removably disposable within the resin functional portion and the grip portion,
the proximal end of the trunk portion is configured to cover a distal end surface of the grip portion and a side surface of the grip portion, and light from the light source in the accommodating space can be incident on the proximal end of the trunk portion.

### Claim 2 (depends on 1)

The medical retractor according to claim 1, wherein the resin functional portion includes a layered structure where layers are stacked so as to have a layer boundary along an extending direction of the trunk portion.

### Claim 3 (depends on 1)

The medical retractor according to claim 1, wherein the back surface and the front surface of the resin functional portion respectively comprises a flat surface.

### Claim 4 (depends on 1)

The medical retractor according to claim 1, wherein at least one of water repellant finish or oil repellant finish is applied to a surface of the resin functional portion.

### Claim 5 (depends on 1)

The medical retractor according to claim 1, wherein a portion of the hook-shaped portion is formed of a light storage member.

### Claim 6 (depends on 1)

The medical retractor according to claim 1, wherein a prism structure, which makes the light refract and advance, is disposed at a bent portion between the trunk portion and the hook-shaped portion.

### Claim 7 (depends on 1)

The medical retractor according to claim 1, wherein a reflection portion is formed along an outer peripheral surface of a bent portion between the trunk portion and the hook-shaped portion.

### Claim 8 (depends on 1)

The medical retractor according to claim 1, wherein finger hooking structures which project sideward from side surfaces of the grip portion are provided in left and right symmetry.

### Claim 9 (depends on 1)

The medical retractor according to claim 1, wherein the resin functional portion has a projection extending to the hook-shaped portion along the front surface of the resin functional portion, and the projection formed on the hook-shaped portion is formed with a larger width and a smaller projecting height compared to the projection formed in the trunk portion.

### Claim 10 (depends on 1)

The medical retractor according to claim 1, wherein the cap is attached to the grip portion.