# US 10,765,554 B2 · Piercing needle-equipped cannula

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- Number: US 10,765,554 B2
- Document ID: US10765554B2
- Status: Granted
- Kind: B2
- Application number: 15/779,526
- Filed: 2016-11-29
- Published: 2018-12-06
- Granted: 2020-09-08
- Earliest claimed: 2015-11-30
- Assignees: Mani, Inc.
- Applicants: MANI, Inc.
- Inventors: Etsuo Murakami
- Web page: https://patentgrep.com/patent/US10765554B2

## CPC

- A61F 9/007: Methods or devices for eye surgery
- A61F 9/00736: {Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments (A61F9/008 takes precedence)}
- A61B 17/3421: {Cannulas}
- A61B 17/3462: {with means for changing the diameter or the orientation of the entrance port of the cannula, e.g. for use with different-sized instruments, reduction ports, adapter seals (expandable cannulas A61B17/3417)}
- A61F 9/0017: {implantable in, or in contact with, the eye, e.g. ocular inserts}
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

There is provided a piercing needle-equipped cannula that has a pre-attached piercing needle, and no deformation of the slit portion due to the piercing needle is left after the piercing needle is pulled out. A piercing needle-equipped cannula (100) includes: a cannula (10) pierced in an eyeball and used in ophthalmic operations; a resin cap (13) having a slit (13a) opened in the cannula (10); and a piercing needle (15) attached to the cannula (10). The piercing needle (15) includes a needle main body (15c) on a front end side, a base (15d) on a base end side, and a slit piercing part (15s) piercing the slit (13a) in a state where the needle main body (15c) and the base (15d) are connected, and the cross-sectional area of the slit piercing part (15s) is smaller than that of the thickest part of the needle main body (15c).

## Claims

### Claim 1

A piercing needle-equipped device, comprising:
a cannula adapted to pierce an eyeball and used in ophthalmic operations;
a resin cap having a slit that can be opened in the cannula; and
a piercing needle attached to the cannula, wherein
the piercing needle is comprised of a needle main body on a front end side, a base on a base end side, and a slit piercing part connecting the needle main body and the base wherein the slit piercing part pierces the slit,
a cross-sectional area of the slit piercing part is smaller than a cross-sectional area of a thickest part of the needle main body, and
a cross-sectional shape of the slit piercing part is a flat rectangle.

### Claim 2 (depends on 1)

The piercing needle-equipped device of claim 1, wherein the slit piercing part and the base have the same cross-sectional shape.