Early feasibility study to estimate the functionality of a novel intervention based on non-invasive transcutaneous electrical stimulation of the hypoglossal nerve to reduce the Apnea Hypopnea Index (AHI).

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.