Photobiomodulation on Pain Perception During the Insertion of the T 380 Copper Intrauterine Device (IUD)

The irradiated region will cover the lumbar and thoracic spine, specifically from T10 to L4, using the Light Emitting Diode panel in a vertical orientation. Photobiomodulation in the experimental group will be administered using 132 Light Emitting Diodes with wavelengths of 660 nm and 850 nm, applied in contact mode. Each Light Emitting Diode has an emission area of 0.5 cm², with an application time of 20 minutes, an irradiance of 16 mW/cm², and an energy delivery of 4.8 J per Light Emitting Diode, resulting in a radiant exposure of 9.6 J/cm².

"The researcher responsible for the photobiomodulation application will simulate irradiation by positioning the device in the exact location as in the Photobiomodulation Group; however, the equipment will remain turned off.~To prevent participants from identifying the group to which they belong, the device's activation sound (beep) will be pre-recorded and played during the application."