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Checks breathing at night in obese adults using CPAP for sleep apnea

Measures how often obese adults with sleep apnea have low night-time breathing while using CPAP.

Plain-language title generated from the registry record
Registry title: Prevalence of Nocturnal Hypoventilation in Obese Subjects Fiited With Continuous Positive Airway Pressure for Obstructive Sleep Apnea / Hypopnea Syndrome

Key facts

Where
Toulouse, FranceSee the site

Could this be for you?

Answer for yourself. This is not a decision: only the study team can say whether you can take part.

  • Are you between 18 and 80 years old?

Source: NCT07152990, who can take part

Where in France

  • CHU de Toulouse - Hopital LarreyToulouse, FranceNo longer taking part

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?
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Trial details

Who runs it
University Hospital, Toulouse
Trial code
NCT07152990
Record updated
3 September 2025
Original description
CAPNOSOH study is a single-center study conducted at Toulouse University Hospital, aiming to estimate the prevalence of obese and apneic subjects maintaining nocturnal hypoventilation under continuous positive airway pressure (CPAP).Read full original descriptionShow less

Prevalence of Nocturnal Hypoventilation Diagnosed by Transcutaneous Oxy-capnography in a Population of Obese Subjects Fitted With Continuous Positive Airway Pressure for Obstructive Sleep Apnea Hypopnea Syndrome.

CAPNOSOH study is a single-center study conducted at Toulouse University Hospital, aiming to estimate the prevalence of obese and apneic subjects maintaining nocturnal hypoventilation under continuous positive airway pressure (CPAP).

Inclusion: Obese patients (Body Mass Index > 30 kg/m2); Fitted by one of the following providers: ASTEN, Vitalaire, Orkyn, ISIS, RespiO2, BASTIDE for > 3 months with compliance of more than 4 consecutive hours per night in average during 3 months; "Good quality" criteria for continuous positive airway pressure (CPAP) treatment: compliance > 4 consecutive hours per night, unintentional leaks < limit defined by the manufacturer, residual AHI < 10/h; Aged 18 to 80; Affiliated or beneficiaries of the social security system or equivalent; Having given written informed consent; Able to understand instructions and information given.

Exclusion: Patient under legal protection measure; Non-compliant patients; Pregnant or breast-feeding women (assessed on questioning).

ClinicalTrials.gov NCT07152990