Obstructive Sleep Apnoea (OSA)

Project Breathe 1 is a short-duration (5 month) pilot investigation to assess the safety and tolerability of non-invasive electrical stimulation in adults with obstructive sleep apnoea. The investigation is an unblinded, uncontrolled, single arm design.

The goal of this study is to collect clinical data on patients who have had a sleep study and are given a diagnosis of a sleep related breathing disorder such as obstructive sleep apnoea. Collecting this data in an organised way will mean that the investigators can monitor patients and their health outcomes.

The goal of this clinical trial is to evaluate whether the Sunrise device (that measure small jaw movements) can improve the diagnosis and management of Obstructive Sleep Apnoea (OSA) in adults (≥ 18 years) referred to a Sleep Clinic. The main question it aims to answer are: \- Does Sunrise lead to a higher proportion of definitive management decisions (initiate OSA treatment, discharge from the sleep clinic service, additional diagnostic testing required or a clinic appointment) compared to current screening practices, which includes either overnight oximetry or use of a wearable device called WatchPAT 300? Researchers will compare Sunrise results with oximetry and WatchPAT 300 outcomes to see if Sunrise improves diagnostic efficiency, reduces time to a diagnosis or clinical decision and enhances patient experience. Participants will: * Follow the standard clinical pathway (oximetry or WatchPAT 300) * Use the Sunrise device simultaneously for one night with their usual test * Complete a patient feedback questionnaire on ease of use and experience * Return all equipment two days later, Sunrise results will not affect their clinical care and will be used for the study only