If you are suffering from snoring, day time sleepiness, feeling tired and fatigued, obesity, hypertension etc. then you might be suffering from Obstructive sleep apnoea (OSA). Sleep related breathing disorders including OSA can be diagnosed by sleep study, also called as polysomnography. Home sleep study are suitable for majority of patients without comorbidities, some patients requires in-lab polysomnography to be done in hospital under observation. It involves connecting various electrodes to your body (similar to done during taking ECG) to record sleep stages, oxygen saturation, heart rate etc to look for sleep disorders.