Systems, methods, and devices for cannula insertion

Patent metadata

Field	Value
Publication number	US-2018271702-A1
Application number	US-201815996759-A
Country	US
Kind code	A1
Filing date	Jun 4, 2018
Priority date	Jul 16, 2014
Publication date	Sep 27, 2018
Grant date	—

Abstract

A cannula insertion system configured to divide a cannula insertion process into a two-step process. The first step advances a needle portion a first distance and the second step advances the needle portion a second distance. The first step and the second step may be at different angles. At least one of the angles may be less than 90°. At least one of the steps may be mechanically assisted.

First claim

1 . A method of implanting a cannula in an eye of a patient, the method comprising:
positioning a cannula insertion system at a first angle relative to a surface of the eye, the first angle being less than 90°; distally advancing a trocar-cannula pair into the eye at the first angle, the trocar-cannula pair comprising a needle portion and a cannula; positioning the cannula insertion system at a second angle relative to the surface of the eye, the second angle being 90°; and distally advancing the trocar-cannula pair further into the eye at the second angle.

2 . The method of claim 1 , wherein distally advancing the trocar-cannula pair into the eye at the first angle comprises distally advancing a slide inserter.

3 . The method of claim 1 , wherein distally advancing the trocar-cannula pair into the eye at the first angle comprises pressing a flexible trigger button.

4 . The method of claim 1 , wherein distally advancing the trocar-cannula pair further into the eye at the second angle comprises pressing a flexible trigger button.

5 . The method of claim 5 , wherein pressing a flexible trigger button comprises allowing a spring to decompress.

6 . The method of claim 1 , further comprising retracting the needle portion of the trocar-cannula pair out of the eye.

7 . The method of claim 1 , further comprising positioning a second trocar-cannula pair for positioning in the eye of the patient.

8 . The method of claim 7 , wherein positioning the second trocar-cannula pair comprises rotating the second trocar-cannula pair.

9 . The method of claim 7 , wherein rotating the second trocar-cannula pair comprises rotating a guiding trail tube having a longitudinal axis aligned with a longitudinal axis of the cannula insertion system.

10 . The method of claim 7 , wherein rotating the second trocar-cannula pair comprises rotating a revolver chamber having a longitudinal axis radially offset from a longitudinal axis of the cannula insertion system.

11 . The method of claim 7 , wherein positioning the second trocar-cannula pair comprises horizontally advancing the second trocar-cannula pair transverse to a longitudinal axis of the cannula insertion system.

12 . The method of claim 1 , wherein the first angle is 45°.

13 .- 23 . (canceled)

Assignees

• Doheny Eye Inst

Inventors

• Humayun Mark
• Lue Jaw-Chyng Lormen

Classifications

• A61B17/3421

  Cannulas · CPC title

• A61F9/007

  Methods or devices for eye surgery · CPC title

• A61F9/00736 Primary

  Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments (A61F9/008 takes precedence) · CPC title

• A61B17/3403

  Needle locating or guiding means · CPC title

• A61B2017/3409

  including needle or instrument drives · CPC title