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The effect of light source filters on tissue visualization: a multicenter trial

Session Details

Session Title: Quick Fire Free Paper Session 03

Session Date/Time: Sunday 29/09/2013 | 08:30-09:30

Paper Time: 08:55

Venue: Hall C (Level 1)

First Author: D.Chow CANADA

Co Author(s):                  

Abstract Details

Purpose:

To systematically evaluate multiple surgeons opinions on the value of light filters on visualization during various types and parts of vitreoretinal surgery.

Setting:

Worldwide Multicenter involving 24 surgeons

Methods:

24 Surgeons from around the world evaluated the effect of different light sources on tissue visualization during various types and parts of vitreoretinal surgery. The baseline Xenon light source on the Bausch and Lomb Stellaris PC was compared to the Mercury Vapor light source followed by the Xenon light source with Yellow, Green or Amber filters introduced. Impressions were recorded online in a grading system. The evaluation was performed during core vitrectomy, peripheral vitreous base work, macular work, and air-fluid exchange. Various factors affecting tissue visualization including fundus pigmentation and surgical pathology were recorded

Results:

359 cases from 24 surgeons were graded using the various light sources and filters. The baseline fundus pigmentation in the cases studied was; 7% Dark, 62% Medium, 20% Light, 10% High Myopes. The underlying surgical pathologies included; 55% Macular surgery, 28% Retinal Detachment, 22% Diabetic Retinopathy, 35% Other. During all stages of vitreoretinal surgery the Xenon light source, Mercury vapor light source and Xenon with Yellow and green filters were found to "Meet or exceed expectations" in >80% of the cases. The Xenon with Amber filter had a skewed response with about 50% of cases having a view that meets expectations and a split on surgeon who preferred this view vs those that hated the view. The results will be further segregated to present ideal viewing situations for specific situations.

Conclusions:

Compared to a baseline Xenon light source the Mercury vapor light source and Xenon with Yellow or Green filters were found to provide a surgical view that met or exceeded expectations in more than 80% cases. The Xenon with Amber filter had a mixed response with only 50% of cases providing a view that met expectations but some surgeons much preferred this filter in certain situations. Given the increased safety of the Mercury Vapor light source and Xenon with Amber filter if the view provided is able to meet surgeon expectations these options offer a clear advantage. Light Filters do appear to aid in tissue visualization for many surgeons.

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