Indwelling needle and liquid injection device

Patent metadata

Field	Value
Publication number	US-2016303333-A1
Application number	US-201615093940-A
Country	US
Kind code	A1
Filing date	Apr 8, 2016
Priority date	Apr 14, 2015
Publication date	Oct 20, 2016
Grant date	—

Abstract

An indwelling needle, which injects a liquid into a living body while being caused to indwell the living body, includes a tubular portion which includes a hollow space for transporting the liquid and a non-hollow distal portion which is stuck into the living body. The tubular portion includes a channel for guiding the liquid to the living body from the hollow space.

First claim

What is claimed is:

1 . An indwelling needle which is caused to indwell a living body, comprising:
a tubular portion that includes a hollow space for transporting a liquid; and a non-hollow distal portion that has a sharpened shape which can be stuck into the living body, wherein the tubular portion includes a channel for guiding the liquid to the living body from the hollow space.

2 . The indwelling needle according to claim 1 , further comprising:
a fixing member that is fixed to the living body.

3 . The indwelling needle according to claim 2 ,
wherein the fixing member includes a fixing surface which adheres to a surface of the living body, and wherein a distance from the fixing surface to the channel is equal to a thickness of a dermic layer of the living body.

4 . The indwelling needle according to claim 2 ,
wherein the fixing member causes the fixing surface to adhere to a surface of the living body, and wherein a distance from the fixing surface to the channel is 0.5 mm to 2.5 mm.

5 . The indwelling needle according to claim 2 ,
wherein the fixing member causes the fixing surface to adhere to a surface of the living body, and wherein a distance from the fixing surface to the channel is equal to a thickness of a subcutaneous tissue of the living body.

6 . The indwelling needle according to claim 4 ,
wherein the fixing member causes the fixing surface to adhere to the surface of the living body, and wherein the distance from the fixing surface to the channel is 3.0 mm to 5.0 mm.

7 . The indwelling needle according to claim 1 ,
wherein an opening of the channel is formed toward a surface of the living body.

8 . The indwelling needle according to claim 1 ,
wherein the entire length including the tubular portion and the distal portion is 5.0 mm or smaller.

9 . The indwelling needle according to claim 1 ,
wherein the tubular portion has a plurality of the channels.

10 . A liquid injection device which injects a liquid into a living body, comprising:
an indwelling needle that is caused to indwell the living body so as to inject the liquid into the living body, wherein the indwelling needle includes
a tubular portion which includes a hollow space for transporting the liquid and
a non-hollow distal portion that has a sharpened shape which can be stuck into the living body, and
wherein the tubular portion includes a channel for guiding the liquid to the living body from the hollow space.

11 . The liquid injection device according to claim 10 ,
wherein the liquid injection device includes a plurality of the indwelling needles.

12 . The liquid injection device according to claim 11 ,
wherein the plurality of the indwelling needles are arranged in parallel, and wherein a plurality of the channels are formed on the tubular portion outwardly.

13 . The liquid injection device according to claim 10 ,
wherein the indwelling needle is caused to indwell obliquely to a surface of the living body, and wherein an opening of the channel is formed toward the surface of the living body.

Assignees

• Seiko Epson Corp

Inventors

• Momose Yoshihiko

Classifications

• A61M5/3298 Primary

  Needles arranged in parallel · CPC title

• A61M5/3286

  Needle tip design, e.g. for improved penetration · CPC title

• A61M5/158 Primary

  Needles {for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body} · CPC title

• A61M5/14248

  of the skin patch type · CPC title

• A61M2005/1585

  Needle inserters · CPC title