Original Article The Effects of Thai Traditional Triangle Pillow and Self-Positional Therapy in Treating Positional Obstructive Sleep Apnea:A Pilot Study Chayungkorn Thonprasertvat,Pasiri Sithinamsuwan Positional obstructive sleep apnea (POSA) is common, affecting sleep quality. This study was to identify the efficacy of using a Thai traditional triangle pillow, as a position device, and self-positional therapy in POSA. ตุลาคม - ธันวาคม 2564