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Iris Fixation via External Pentagram Suturing

Iris Fixation via External Pentagram Suturing

Published on: May 5, 2022

Iris suture fixation: Push-knot needle.

Fei Liu¹, Qiang Zhou¹, Charles Q Yu¹

¹From Dongguan Aier Ophthalmic Hospital (Liu), Dongguan, the Department of Ophthalmology (Geng), the First Affiliated Hospital of Kunming Medical University, Kumming City, and the Department of Ophthalmology (Chen), First Hospital of Xi'an, Shanxi Institute of Ophthalmology, Shanxi Provincial Key Laboratory of Ophthalmology, Xi'an, Shanxi, China; the Department of Ophthalmology and Visual Sciences (Zhou, Yu, Guaiquil, Rosenblatt), Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA.

Journal of Cataract and Refractive Surgery

|May 24, 2017

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This study introduces a novel technique for creating secure locking knots for ophthalmic procedures like iris reconstruction and lens fixation. The method utilizes a modified needle to enable controllable knot placement through a single small corneal incision.

Area of Science:

Ophthalmology
Surgical Techniques
Biomedical Engineering

Background:

Iris reconstruction and intraocular lens (IOL) fixation are critical ophthalmic procedures.
Current techniques may require multiple incisions or significant anterior chamber space.
A need exists for efficient and minimally invasive knot-tying methods in anterior segment surgery.

Purpose of the Study:

To describe a novel, controllable technique for creating locking knots for iris reconstruction and IOL fixation.
To demonstrate a method that minimizes corneal incisions and anterior chamber space requirements.

Main Methods:

A modified needle was created by straightening the tip of an ophthalmic viscosurgical device or lacrimal cannula needle.
Sutures were passed through the iris defect, externalized, and looped.

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One suture strand was inserted into the modified needle and advanced into the anterior chamber for knot placement.

The process was repeated to create additional locking knots.

Main Results:

The technique allows for the creation of secure locking knots in the anterior chamber.
Only one small corneal incision is required, irrespective of the number of knots.
The procedure requires minimal anterior chamber space during knot tying.

Conclusions:

This novel technique offers a minimally invasive approach to iris reconstruction and IOL fixation.
The controllable knot placement and reduced incision requirement represent a significant advancement in ophthalmic surgical methods.