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Posture, Interface, and Peak Cough Flow (PCF P/I)

Body Posture and Interface Effects on Peak Cough Flow in Healthy Adults: A Randomized Crossover Study

Cough is a key airway protective mechanism requiring coordinated neuromuscular function. Peak cough flow (PCF) is a simple, non-invasive measure widely used to assess cough effectiveness and guide clinical decisions. Current ATS/ERS guidelines recommend measuring PCF in a seated position using a mouthpiece with a nose clip; however, this setup is not always feasible in clinical practice. Some patients cannot maintain posture or ensure an adequate mouthpiece seal, making a facial mask a potential alternative. The influence of body position and interface on PCF measurements remains unclear, with limited evidence from randomized crossover studies.

This study aims to evaluate the effects of body position (sitting vs standing) and measurement interface (mouthpiece vs facial mask) on PCF in healthy young adults. In a randomized within-subject crossover design, participants perform PCF measurements under four conditions (Sit-Mask, Stand-Mask, Sit-Mouthpiece, Stand-Mouthpiece) during a single session. The findings will help inform more flexible and standardized PCF assessment procedures in clinical practice.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Cough is an essential protective mechanism that requires intact neuromuscular function and precise coordination across the inspiratory, compressive, and expulsive phases. Peak cough flow (PCF) is a simple, non-invasive measure, widely used to assess cough intensity and guide clinical decisions. Because of its clinical relevance, standardized procedures are essential. Current ATS/ERS recommendations specify seated testing with a mouthpiece and a noseclip (MP). However, this configuration is not always possible or consistently used in practice. Many patients cannot maintain adequate posture or mouthpiece seal, and a facial mask (FM) may be a feasible alternative. Evidence regarding the effects of posture (sitting vs standing) and interface (MP vs FM) on PCF remains inconsistent, with few studies comparing both factors within the same individuals using a randomized crossover design.

Aims To determine the effects of body position (sitting vs standing) and measurement interface (FM vs MP) on PCF in healthy young adults. We hypothesized that both factors would influence PCF.

Methods This randomized within subject crossover study included healthy, non smoking adults aged 20-30 years. Exclusion criteria were chronic disease, top-level athletic status and any signs of obstruction and/or auscultatory noise (wheezing or stridor) before the trial. Each participant completed four randomized conditions during a single session: Sit-Mask, Stand-Mask, Sit-Mouthpiece, and Stand-Mouthpiece. PCF (L/s) was measured using an ultrasonic spirometer (SpiroScout, Ganshorn). For each condition, participants performed three standardized maneuvers consisting of three tidal breaths, a rapid inspiration to total lung capacity, and a maximal cough; the highest PCF per condition was used for analysis. A two factor repeated measures ANOVA evaluated the effects of posture, interface, and their interaction (α = 0.05).

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

24

Fase

  • Ikke anvendelig

Kontakter og lokationer

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Studiesteder

      • Brussels, Belgien, 1180
        • Cliniques universitaires Saint-Luc

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen

Tager imod sunde frivillige

Ja

Beskrivelse

Inclusion Criteria:

  • Healthy adults aged 20 to 30 years
  • Non-smoker
  • Self-reported good health status
  • Able to perform all four randomized cough conditions

Exclusion Criteria:

  • Any chronic disease
  • Signs of airway obstruction on clinical examination
  • Auscultatory abnormalities (wheezing or stridor) prior to testing
  • Incomplete participation in all four conditions

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Andet
  • Tildeling: Randomiseret
  • Interventionel model: Crossover opgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Aktiv komparator: Sit-Mask
Peak cough flow measured in the seated position. The facial mask (V2 Mask™, Hans Rudolph, Inc., Kansas, USA; size fitted to participant) was connected to an ultrasonic spirometer (SpiroScout, Ganshorn) via a PFT filter. Participants performed three tidal breaths followed by a maximal cough, repeated three times.
Peak cough flow measured in the standing position. Same device and procedure as Sit-Mask condition.
Aktiv komparator: Stand-Mask
Peak cough flow measured in the seated position. The facial mask (V2 Mask™, Hans Rudolph, Inc., Kansas, USA; size fitted to participant) was connected to an ultrasonic spirometer (SpiroScout, Ganshorn) via a PFT filter. Participants performed three tidal breaths followed by a maximal cough, repeated three times.
Peak cough flow measured in the standing position. Same device and procedure as Sit-Mask condition.
Aktiv komparator: Sit-Mouthpiece
Peak cough flow measured in the seated position. The mouthpiece (Pulmosafe, Lemon Medical GmbH, Hammelburg, Germany) was used with a nose clip and connected to an ultrasonic spirometer (SpiroScout, Ganshorn) via a PFT filter. Participants performed three tidal breaths followed by a maximal cough, repeated three times.
Peak cough flow measured in the standing position. Same device and procedure as Sit-Mouthpiece condition.
Aktiv komparator: Stand-Mouthpiece
Peak cough flow measured in the seated position. The mouthpiece (Pulmosafe, Lemon Medical GmbH, Hammelburg, Germany) was used with a nose clip and connected to an ultrasonic spirometer (SpiroScout, Ganshorn) via a PFT filter. Participants performed three tidal breaths followed by a maximal cough, repeated three times.
Peak cough flow measured in the standing position. Same device and procedure as Sit-Mouthpiece condition.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Peak cough Flow (PCF)
Tidsramme: Day 1
PCF measurement in L/s
Day 1

Samarbejdspartnere og efterforskere

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Sponsor

Publikationer og nyttige links

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Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

1. maj 2024

Primær færdiggørelse (Faktiske)

31. august 2024

Studieafslutning (Faktiske)

21. maj 2026

Datoer for studieregistrering

Først indsendt

21. maj 2026

Først indsendt, der opfyldte QC-kriterier

1. juni 2026

Først opslået (Faktiske)

8. juni 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

8. juni 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

1. juni 2026

Sidst verificeret

1. juni 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 2023/14JUI/264

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