Adenotonsillectomy is the primary treatment for type 1 obstructive sleep apnoea (OSA1). Although polysomnography (PSG) remains the gold standard for measuring Apnoea-Hypopnoea Index, it is a labour-intensive procedure and does not correlate with improvements in quality of life postadenotonsillectomy. Mouth breathing is associated with poorer quality of life in children. Mandibular movement (MM), which measures mouth opening, is a validated measure of respiratory effort that can be easily and safely assessed in children using the JAWAC technology. This study aims to evaluate the relationship between changes in quality of life and changes in mouth opening in children with OSA1 after undergoing adenotonsillectomy. Secondary objectives include evaluating changes in quality of life, clinical symptoms and other MM and PSG metrics in the same population.

This exploratory, non-randomised, monocentric, prospective cohort study with a non-blinded single arm will include 50 children aged 3–7 years, undergoing adenotonsillectomy at the Clinique Saint Jean, Montpellier, France. Quality of life will be measured using the parent version of the Paediatric Quality of Life Inventory and MM metrics will be measured during PSG using the JAWAC system during the inclusion visit and 3 months after adenotonsillectomy. The primary outcome will be the correlation between the changes in quality of life and mouth opening (1/10 mm) postadenotonsillectomy. Secondary analyses will evaluate changes in clinical symptoms, PSG measures and other MM metrics including respiratory effort, as well as the associations between these measures.

This study was approved by an independent ethics committee (Comité de Protection des Personnes Est) on 24 March 2025 (2024-A02761-46) and will be conducted in accordance with French law, good clinical practice and the guidelines of the Declaration of Helsinki. Study findings will be disseminated through international peer-reviewed journal articles as well as public, academic presentations at national and international conferences.

NCT06973928.

Hypoxaemic acute respiratory failure (ARF) in intensive care unit (ICU) patients is associated with high mortality. Three main devices are used to provide oxygen to hypoxaemic ARF patients: non-invasive ventilation (NIV), high-flow nasal cannula oxygen (HFNO) and standard oxygen (first-attempt device in usual care). To date, no multicentre randomised controlled study has compared NIV and HFNO to standard oxygen with day 28 mortality rate as primary outcome in hypoxaemic ARF in non-selected patients. Our hypothesis is that NIV and/or HFNO is superior to standard oxygen to reduce day 28 mortality rate in hypoxaemic ARF.

The Key oxygenation Interventions in Surgical and non-Surgical patients (KISS) trial is an adaptive investigator-initiated, multicentre, stratified, parallel-group unblinded trial with an electronic system–based randomisation. Patients with hypoxaemic ARF were randomly assigned to one of three groups: the ‘NIV-group’ to receive curative NIV combined with HFNO delivered between NIV trials, or the ‘HFNO’ group to receive HFNO alone, or the ‘standard oxygen-group’ to receive oxygen therapy alone.

The primary endpoint is day 28 all-cause mortality. The main secondary endpoint is intubation rate at day 28. The exploratory endpoints are intubation rates at day 3 and day 7; oxygenation up to day 7; need for other rescue oxygen therapy up to day 7; ICU and hospital length of stay; and mortality rates in ICU, hospital and at day 90.

The main objective is to assess if NIV and/or HFNO is superior to standard oxygen to reduce day 28 mortality rate in hypoxaemic ARF. Additional comparisons between predefined stratum following randomisation will be performed: (1) medical versus postoperative admissions, (2) among medical (immunocompromised vs non-immunocompromised) and (3) among postoperative (abdominal vs cardio-thoracic).

An adaptive design will be used. Two interim analyses will be performed after 700 and 1400 included patients among the 2100 planned.

The study project has been approved by the appropriate ethics committee ‘Comité-de-Protection-des-Personnes Sud-Est V-23-CHUM-01 Cat2 2022-A02761-42/1’. Informed consent is required. The results will be submitted for publication in a peer-reviewed journal and presented at one or more scientific conferences. If NIV and/or HFNO reduce the mortality at day 28, NIV and/or HFNO could be proposed to become one of the first-line therapies in hypoxaemic ARF patients.

NCT05812911.

In non-intubated patients, symptomatic treatment of hypoxaemic respiratory failure is still debated, with different options: (1) standard oxygen therapy (SOT), (2) high-flow nasal cannula oxygen therapy (HFNC) and (3) non-invasive ventilation (NIV). The objective of this study is to compare the effects of HFNC and NIV on lung volumes assessed by CT scan to allow a better understanding of their effectiveness.

The HONIVAH study (High-flow Oxygen therapy and Non-Invasive ventilation on lung Volumes and on upper Airway in Hypoxemic critically ill patients) is an investigator-initiated, prospective, single-centre, physiological, randomised, parallel-group, unblinded trial with an electronic system-based randomisation. Patients with hypoxaemic respiratory failure, defined as the need for SOT flow ≥3 L/min to maintain a pulsed oxygen saturation ≥95%, and a CT scan prescribed by the physician in charge of the patient, will be randomly assigned to the HFNC group or the NIV group. Two inspiratory thoracic CT scans will be performed, one with SOT as part of the routine patient management and a second thoracic CT scan with HFNC or NIV, depending on the allocation group. The primary outcome is the comparison of the relative variation in ‘poorly aerated’ and ‘non-aerated’ lung volumes before and after the intervention between the HFNC group and NIV group, assessed by thoracic CT scan. Secondary outcomes included the variation in tracheal cross-sectional upper airway area, lung volumes, gas exchange and patient comfort.

The study project has been approved by the appropriate ethics committee (Comité de Protection des Personnes Sud-Ouest et Outre-mer 1, France, 2022-A02458-35). Informed consent is required. The results will be submitted for publication in a peer-reviewed journal and presented at one or more scientific conferences.

ClinicalTrials.gov identifier: NCT05643911.