Study of the Usability and Efficacy of a New Pediatric CPAP Mask

This study will evaluate a newly developed pediatric mask (known as Pixi) on children aged 2-7 using continuous positive airway pressure (CPAP), or Non-invasive ventilation (NIV) treatment. The participants will undergo a monitored sleep study, followed by a 7 night trial of the Pixi mask in the home environment. During the study usability will be measured through questionnaires filled in by the parent and clinician. The study hypothesis is that the usability of the mask will be superior to the patient's usual mask.