Sierra Sleep Diagnostics performs overnight sleep studies for diagnosing obstructive sleep apnea, central sleep apnea and other sleep related respiratory issues. We are also equipped to do home sleep testing. Although not nearly as comprehensive as an in-lab monitored study, it is the route insurances are going as a first line of testing. Symptoms of OSA would include snoring, stop breathing, gasping for breath, spontaneous awakening, daytime fatigue. Sleep apnea can contribute to diabetes and even glaucoma. Untreated sleep apnea increases your risks of heart attack, stroke, and even sudden death.