Testing a novel mattress device to record sleep-disordered breathing in children

Use of a novel mattress sensor device and a finger pulse oximeter ring device for up to 14 nights in the home will provide comparative observational data for comparisons between devices across multiple nights in paediatric patients with clinical signs and symptoms of sleep disordered breathing. The mattress sensor device is a long, thin, flat sensor strip that is placed on top of the mattress under the chest of the person lying in bed. The bed sensor is placed under the mattress protector and bottom bed sheet so there is no physical contact with the study participant. The sensor connects to a low-voltage USB-powered device placed next to the bed (e.g. on a bedside table or floor), which also contains acoustic and environmental condition (light, temperature and humidity) sensors. The device is triggered to record when the bed sensor detects movement (body movements and respiratory movements) and continuously captures respiratory related motion and acoustic data when movement is present. Users can very easily turn the device off to prevent recordings if they wish. The finger pulse oximeter device is a wrist device with finger probe that is securely taped onto a suitable finger tip (one of the most reliable vascular beds for oximetry) prior to sleep. Trial participants will be asked to use the oximeter on at least on one night during the 14 nights at home, but preferably more often. Data are stored on onto the wrist device for subsequent download and off-line analysis of conventional oximetry metrics (average levels, oxygen desaturation indices and hypoxic burden). Participants and their parent will have a 30 minute face-to-face meeting with researchers where the devices will be shown and instructions given on their use. Instructional materials, including trouble-shooting guides and contact details for support if required will also be provided. The parent will be asked to complete a brief daily diary to record if the devices were used the previous night and any issues that arose. If the participant does undergo upper airway surgery after participating in the 14 at-home nights, there is an option to repeat the 14 nights at home with the two devices once recovered from the surgery. This will be an opt-in choice by the parent and participant. These preliminary observational data will be used to test the sensitivity of novel device measures to standard care surgical interventions, with oximetry as a useful comparator control.