Mechanical Versus Alcohol Epithelial Debridement During Hotorefractive Keratectomy (PRK)

October 12, 2010 updated by: Shahid Beheshti University of Medical Sciences

Mechanical Versus Alcohol-Assisted Epithelial Debridement During Photorefractive Keratectomy: A Confocal Microscopic Clinical Trial

In this prospective randomized clinical trial, confocal microscopy was used to evaluate the effect of mechanical versus alcohol-assisted epithelial debridement during photorefractive keratectomy (PRK)on corneal cellular elements. Sixty-six eyes of 33 subjects with a spherical equivalent less than -4.00 D who completed all follow-up visits were evaluated.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

33

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

16 years to 36 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • spherical equivalent ≤ -4.0 D
  • cylinder ≤ 1.50 D

Exclusion Criteria:

  • history of ocular trauma or surgery
  • any corneal and ocular pathologies
  • central corneal thickness < 500 µm
  • scotopic pupil diameter > 6.0 mm
  • any abnormalities in corneal plain or elevation topographies favoring keratoconus or other ectatic disorders
  • the presence of systemic disorders such as collagen vascular diseases

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Mechanical debridment
In this arm, corneal epithelium was removed during PRK using conventional mechanical method.
Procedure: Mechanical debridement
For mechanical epithelial removal, an 8.0-mm optical zone marker was applied to the cornea, centering over the entrance pupil. A hockey spatula was used to remove the central corneal epithelium.
Experimental: Alcohol-asstisted debridement
In this arm, corneal epithelium was removed using ethanol 20% during PRK.
Procedure: Alcohol-assisted debridement
For alcohol-assisted debridement, 20% ethyl-alcohol solution was instilled into an 8.0-mm well and kept in contact with epithelium for 20 seconds (being careful to avoid spillage over the areas not being treated). It then absorbed using a dry cellulose sponge followed by copious irrigation with BSS. The epithelium of the central cornea was removed using a blunt spatula.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Corneal cellular elements.
Confocal microscopic findings of corneal cellular elements.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Shahid Beheshti University of Medical Sciences

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

July 1, 2009

Study Completion (Actual)

March 1, 2010

Study Registration Dates

First Submitted

June 10, 2009

First Submitted That Met QC Criteria

June 10, 2009

First Posted (Estimate)

June 11, 2009

Study Record Updates

Last Update Posted (Estimate)

October 13, 2010

Last Update Submitted That Met QC Criteria

October 12, 2010

Last Verified

April 1, 2010

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 8713

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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