Home > Lung Disease > Sleep Study- A Way to Measure How Well You Sleep Get the Flash Player to see this player. Rate: (Click the stars to rate) Published on Dec 17, 2009 by fauquierent, Views: 4334 The sleep study, a way to measure how well you sleep at night. Sleep apnea is a disease in which the sleep is disturbed by multiple episodes of brief awakening due to episodes when you briefly stop breathing. Sleep apnea can cause daytime sleepiness, fatigue, decreased energy. A sleep study helps to diagnose sleep apnea.