Clinical Research Directory

Posterior nasal nerve ablation using laser is performed through an angled nasal probe at 20 degrees and a 90-degree endoscope to deliver laser energy to the posterior nasal nerve area. The thermal energy is conducted to the middle meatus and the posterior superior part of the inferior turbinate, targeting the area supplied by the posterior nasal nerve. The ablation continues until there is widespread mucosal blanching and the formation of at least one continuous brown eschar

The same laser surgical instrument is used to enter the nasal cavity for a sham procedure with minimal dosage. The energy setting uses the lowest limit of 0.5W with intermittent emission (0.01 second emission with 1 second rest), and the emission mode is Super Pulse to reduce heat dispersion. It is applied to the mucosal surface without blood supply at the lower edge of the middle turbinate for 2 minutes on each side, totaling only 1.2 seconds of cumulative laser emission. Compared to the experimental group using 2W energy with continuous irradiation for 2 minutes, the total energy release difference in the sham surgery group is only 1/400 of the experimental group (2W120sec/0.5W1.2sec). This is to produce the sound, light, and tactile effects of the laser, but without sufficient energy transfer to cause high-temperature mucosal changes and tissue alterations, serving as a high-quality sham surgery control group.