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Completed

NCT Number: NCT01033968

Pain Perception at Laser Treatment

The purpose of this study is to compare the pain perception at laser treatment of peripheral retinal degenerations with green and infrared wavelengths.

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Key information

Conditions

Laser Therapy, Low-Level

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 4

About this study

Purpose: To compare the pain perception at laser treatment of peripheral retinal degenerations with green and infrared wavelengths.

Methods: Thirty patients (60 eyes) were enrolled in the study. Each patient had one eye treated with infrared laser (diode, 810nm) and the other eye treated with green laser (frequency-doubled solid state laser, diode-pumped, with 532-nm). The laser treatment was performed following a standardized protocol. Immediately after photocoagulation, the patient was asked to grading pain perception according an 11-point (i.e. 0-10) numerical rating scale (NRS) 2,3, accompanied by the instructions "Please rate your pain by indicating the number that best describes it". This NRS is represented as a straight line (10 cm in length). The numbers between 0 and 10 are spaced at regular intervals along the line, at either end of the line are two poles that are defined as the extreme limits of the response to be measure, with '0' meaning 'No pain' and '10' meaning 'Pain as bad as you can imagine'.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • horseshoe tears and dialyses, besides operculated holes and lattice degeneration in symptomatic patients (photopsias) or with history of retinal disease

Exclusion criteria

  • severe liver disease, pregnancy, patients on regular analgesics, previous laser photocoagulation, and age less than 18 years old.

Treatment and study plan

retina photocoagulation

Procedure

Each patient had one eye treated with infrared laser (diode, 810nm wavelength) and the other eye treated with green laser (frequency-doubled solid state laser, diode-pumped, with 532-nm wavelength

Primary outcomes

  1. Although the treatment of peripheral retinal degenerations with infrared laser to be well tolerated by the majority of the patients, it is more painful than with green wavelength.

Sponsors and collaborators

Lead sponsor

University of Campinas, Brazil

Other

Registry information

Official study title

Pain Perception at Laser Treatment of Peripheral Retinal Degenerations With Green and Infrared Wavelengths

Important dates

Study start
2009
Primary completion
2009
Study completion
2010
First posted
Dec 17, 2009
Registry last updated
May 20, 2010

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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