Hypercapnic Burden in Adults With Obesity Undergoing Diagnostic Polysomnography for Suspected Obstructive Sleep Apnea (HBO-POSA)
Hypercapnic Burden in Adults With Obesity Undergoing Diagnostic Polysomnography for Suspected Obstructive Sleep Apnea: A Prospective Observational Cohort Study
Obesity-related sleep hypoventilation represents a continuum ranging from isolated nocturnal hypoventilation to obesity hypoventilation syndrome. Current diagnostic criteria rely mainly on dichotomous thresholds and may not adequately reflect cumulative nocturnal carbon dioxide exposure.
Hypercapnic burden, defined as the cumulative area under the transcutaneous carbon dioxide (PtcCO₂) curve above a predefined threshold, has recently emerged as a novel physiological marker integrating both the intensity and duration of nocturnal hypercapnia.
This prospective observational cohort study aims to evaluate the association between nocturnal hypercapnic burden and obstructive sleep apnea severity, assessed by the apnea-hypopnea index (AHI), in adults with obesity referred for diagnostic polysomnography.
Secondary objectives include evaluating associations between hypercapnic burden and sleep architecture, respiratory events, oxygenation parameters, daytime symptoms, and patient-reported outcomes. In addition, the study will investigate the relationship between nocturnal hypercapnic burden and sleep inertia, assessed using the Sleep Inertia Questionnaire (SIQ), based on the hypothesis that greater nocturnal carbon dioxide exposure immediately before awakening may contribute to impaired alertness upon awakening.
Hypothesis: Increased nocturnal hypercapnic burden is associated with greater obstructive sleep apnea severity and reflects an additional physiological dimension of obesity-related sleep hypoventilation beyond conventional polysomnographic indices. Furthermore, higher nocturnal hypercapnic burden is hypothesized to be associated with greater sleep inertia.
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Undersøgelsestype
Undersøgelsestype
Tilmelding (Anslået)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiekontakt
Studiekontakt
- Navn: Pierre TANKERE, Dr
- Telefonnummer: 0472071929
- E-mail: Pierre.tankere01@chu-lyon.fr
Undersøgelse Kontakt Backup
- Navn: Laure PETER DEREX, Pr
- Telefonnummer: 0472071929
- E-mail: Laure.peter-derex@chu-lyon.fr
Studiesteder
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Lyon, Frankrig, 69004
- Croix-Rousse Hospital, Hospices Civils de Lyon
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Kontakt:
- Pierre TANKERE, Dr
- Telefonnummer: 0472071929
- E-mail: Pierre.tankere01@chu-lyon.fr
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Ledende efterforsker:
- Virginie INFANTI, Dr
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
- Ældre voksen
Tager imod sunde frivillige
Beskrivelse
Inclusion Criteria:
- Age ≥18 years.
- Body mass index (BMI) ≥30 kg/m².
- Referred to the Sleep Medicine Center for routine diagnostic polysomnography because of suspected obstructive sleep apnea.
- Affiliated with a French health insurance scheme.
- Received information about the study and did not object to the use of their data.
- Able to understand the study information and complete study questionnaires.
Exclusion Criteria:
- Legal incapacity or inability to provide non-opposition to participation.
- Previous treatment with continuous positive airway pressure (CPAP) or non-invasive ventilation.
- Participation in another interventional clinical study that could interfere with the present study.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Diagnostisk
- Tildeling: N/A
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
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Eksperimentel: Adults with obesity referred for diagnostic polysomnography
Adults with obesity (body mass index ≥30 kg/m²) referred to the Sleep Medicine Center for routine diagnostic polysomnography because of suspected obstructive sleep apnea
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The only research-specific procedure is the completion of the Sleep Inertia Questionnaire (SIQ), a self-administered questionnaire requiring approximately 5 minutes to complete and performed once after the diagnostic sleep study.
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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Correlation between nocturnal hypercapnic burden and apnea-hypopnea index
Tidsramme: Baseline only (overnight diagnostic polysomnography)
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Correlation between nocturnal hypercapnic burden above 45 mmHg (HB45), defined as the area under the nocturnal transcutaneous carbon dioxide pressure (PtcCO₂) curve above 45 mmHg and normalized per hour of recording (mmHg·min/hour), and the apnea-hypopnea index derived from diagnostic polysomnography (events/hour). The correlation will be assessed using Pearson's or Spearman's correlation coefficient, according to data distribution. |
Baseline only (overnight diagnostic polysomnography)
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Datoer for undersøgelser
Studer store datoer
Studiestart (Anslået)
Studiestart
Primær færdiggørelse (Anslået)
Primær færdiggørelse
Studieafslutning (Anslået)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Sygdomme i nervesystemet
- Ernæringsforstyrrelser
- Overernæring
- Kropsvægt
- Luftvejssygdomme
- Respirationsforstyrrelser
- Søvnvågningsforstyrrelser
- Overvægtig
- Apnø
- Søvnforstyrrelser, iboende
- Dyssomnier
- Respiratorisk insufficiens
- Patologiske tilstande, tegn og symptomer
- Ernæringsmæssige og metaboliske sygdomme
- Tegn og symptomer
- Hypoventilation
- Fedme
- Søvnapnø syndromer
- Søvnapnø, obstruktiv
- Fedme Hypoventilationssyndrom
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- 69HCL26_0743
- ID RCB (Anden identifikator: 2026-A01760-51)
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
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