NCT07152990|Not Yet Recruiting
Prevalence of Nocturnal Hypoventilation in Obese Subjects Fiited With Continuous Positive Airway Pressure for Obstructive Sleep Apnea / Hypopnea Syndrome
CAPNOSOH
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CAPNOSOH
Sponsor study identifier
Secondary identifiers
OTHER · ANSM
interventional
139
1 country
1
Study Start
September 2025
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Primary Completion
May 2027
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
Study Completion
May 2027
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
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).
Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.
May 2027
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
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Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.
August 25, 2025
Actual (reported)September 2025
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
September 3, 2025
Actual (reported)May 2027
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
May 2027
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
Prevalence of nocturnal alveolar hypoventilation
Prevalence of nocturnal alveolar hypoventilation will be diagnosed by transcutaneous oxy-capnography. Nocturnal alveolar hypoventilation is defined with PTcCO2 \> 49 mmHg more than 10% of the time of capnographic recording.
1 month
Patients will be monitored using transcutaneous oxy-capnography to evaluate the prevalence of nocturnal alveolar hypoventilation in these population. Nocturnal alveolar hypoventilation is defined with PTcCO2 \> 49 mmHg more than 10% of the time of capnographic recording.
Epworth Sleepiness Scale, Pittsburgh Sleep Quality Index, and the "Patient-Reported Hypoventilation Questionnaire".
CHU de Toulouse Hôpital Larrey
Toulouse, Occitanie, 31059, France
First Submitted
August 25, 2025
First Posted
September 3, 2025
Study Start
September 2025
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Tongue Muscular Assessment in Children With Sleep Disordered Breathing
Arterial blood gas analysis will be performed only in patients presenting nocturnal hypoventilation.
Plethysmography will be performed only in patients presenting nocturnal hypoventilation. It will be used to measure lung volume and assess pulmonary function. This non-invasive procedure involves the patient breathing into a device that measures changes in pressure within a sealed chamber.
The intervention will be performed only in patients presenting nocturnal hypoventilation. Spirometry with a reversibility test will be performed to assess lung function and evaluate the response to bronchodilators. The procedure involves measuring forced expiratory volume and forced vital capacity before and after the administration of a bronchodilator.
Clinical exam will be performed only in patients presenting nocturnal hypoventilation. It will consists of standard interview/clinical examination: vital signs, cardiological, pulmonary, abdominal, neurological examination, search for clinical signs of nocturnal hypoventilation, search for signs of hypoxia/hypercapnia, pulmonary auscultation.
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Primary Completion
May 2027
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
Study Completion
May 2027
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
Last Updated
September 3, 2025
Record last verified: 2025-08
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Source: ClinicalTrials.gov.
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