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.
|Study Design:||Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Single Blind (Subject)
Primary Purpose: Treatment
|Official Title:||Pain Perception at Laser Treatment of Peripheral Retinal Degenerations With Green and Infrared Wavelengths|
- 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. [ Designated as safety issue: Yes ]
|Study Start Date:||January 2009|
|Study Completion Date:||May 2010|
|Primary Completion Date:||December 2009 (Final data collection date for primary outcome measure)|
Procedure: retina photocoagulation
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'.