Early Feasibility Study of Transcutaneous Upper Airway Stimulation in Obstructive Sleep Apnea

Inclusion Criteria: * Provision of signed and dated informed consent form * Stated willingness to comply with all study procedures and availability for the duration of the study * Male or female, aged 18 years or older * In good general health, as evidenced by medical history and diagnosed with moderate or severe OSA * In-lab PSG, within the last 6 months, with an AHI of 15-50/hour. In addition, \<25% of the respiratory events on the diagnostic PSG can be attributed to central apneas * BMI less than or equal to 32 Exclusion Criteria: * No or mild OSA (AHI \<15/h) or very severe OSA (AHI \>50/hour), exclusively postural sleep apnea, or isolated Rapid-Eye-Movement (REM) sleep associated OSA. * Patients who are cachectic (BMI \<18.5 kg/m2) or obese (BMI \>32 kg/m2). * Patients should not have enlarged tonsils (size 3-4) and/or adenoids, nasal polyps, neuromuscular disease, hypoglossal nerve palsy, abnormal pulmonary function tests, severe pulmonary hypertension, valvular heart disease, heart failure (New York Heart Association, NYHA III-IV), recent myocardial infarction, significant cardiac arrhythmias, atrial fibrillation, stroke, opioid usage, uncontrolled hypertension, known allergic reaction to adhesives or latex, active psychiatric disease, co-existing non-respiratory sleep disorder, pregnancy or significant metal implants or cardiac/other pacemakers. * Patients with facial hair that affects the correct placement of the electrodes, if they are unwilling to shave.