A Home Sleep Apnea Test (HSAT) is a test that uses a small portable sleep recorder to be worn overnight while you sleep in the comfort of your own home. The portable home sleep recorder will record your oxygen levels, your breathing, your heart rate, chest movements and show if you were snoring and what position you slept in. The results of an overnight Home Sleep Apnea Test will be interpreted by a board-certified sleep physician to diagnose sleep apnea.