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Forced Inspiratory Flow Volume Curve in Healthy Young Children

20. september 2007 oppdatert av: Sheba Medical Center

Spirometry testing should include both expiratory and inspiratory measurements as it may influence the expiratory flow volume curve indices. The ability to inhale medication may by judged by inspiratory flows. However, the inspiratory portion of the forced flow/volume maneuver in young healthy children has not yet been described.Objectives: To document and analyze the forced inspiratory flow volume curve indices in healthy young children.

Settings: Community kindergartens around Israel. participants; Healthy preschool children (age 2.5-6.5 years).

Methods: The teaching method included multi-target, interactive spirometry games (SpiroGame®) and accessory games for inspiration (e.g. inspiratory whistle).

Results: One hundred and fourteen of 157 children performed duplicate full adequate inspiratory maneuvers. Repeatability between two maneuvers was 5.6%, 4.0%, 5.1%, 7.3% for inspiratory capacity (IVC), forced inspiratory capacity (FIVC), peak inspiratory capacity (PIF), and mid inspiratory flow (MIF50), respectively. Inspiratory flow indices were significantly lower than the parallel expiratory flow indices and the time to reach PIF was significantly slower than the time to reach peak expiratory flow (meanSD; 22921ms vs. 92 8ms; p<0.0001). The shape of the inspiratory curve was parabolic and did not change with age. Predicted equations that were formed were in agreement with the extrapolated prediction equation values of older children.

We found that the majority of healthy young children can produce reliable inspiratory curves. Our results provide a framework for reference equations for inspiratory flow volume curve in the young ages. The clinical applications of these equations are yet to be explored.

Studieoversikt

Status

Fullført

Forhold

Detaljert beskrivelse

Study protocol: The study included healthy children (according to questionnaire) in their early childhood. Any children with previous symptoms or present treatment for asthma, respiratory symptoms (cough, post nasal drip, pneumonia, rhinitis) other respiratory diseases were excluded from the study. Forced maneuvers were measured with a commercial spirometer, ZAN100 (ZAN Messgerate, Oberthulba, Germany). The spirometer software included online analysis of inspiratory and expiratory maneuvers. The curves were monitored on the computer screen to ensure best effort. The software also included an incentive-guided spirometry game. Inspiratory indices were not part of the games, therefore efforts were continued until the child could not pass the former inspiratory attempt any further. Healthy children performed the tests in a designated room in the kindergarten. Tests were performed in a standing position without a nose-clip. Maneuvers were repeated to obtain best possible efforts on at least three technically acceptable maneuvers. Technically acceptable curves were stored and the three consecutive curves with the maximal inspiratory maneuvers were analyzed for the study.

Studietype

Observasjonsmessig

Registrering (Faktiske)

157

Kontakter og plasseringer

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Studiesteder

      • Ramat-Gan, Israel, 52621
        • The Edmond and Lily Safra Children's Hospital, Sheba Medical Center

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

3 år til 6 år (Barn)

Tar imot friske frivillige

Ja

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

Inclusion Criteria:

  • healthy children between 3-6 years old

Exclusion Criteria:

  • Past or present respiratory lung disease

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

Kohorter og intervensjoner

Gruppe / Kohort
>100

The study included healthy children (2.5-6.5 years old) from a number of public kindergartens. An initial screening questionnaire based on the ATA-DLD-78-A for adults, adapted for children and translated into Hebrew, concerning the child's birth, past and present health status, was completed by the parents.

Exclusion criteria: Previous symptoms or treatment for asthma, current respiratory symptoms or other present respiratory diseases.

Samarbeidspartnere og etterforskere

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Etterforskere

  • Hovedetterforsker: Barak Asher, MD, Sheba Medical Center

Publikasjoner og nyttige lenker

Den som er ansvarlig for å legge inn informasjon om studien leverer frivillig disse publikasjonene. Disse kan handle om alt relatert til studiet.

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart

1. januar 2003

Studiet fullført (Faktiske)

1. oktober 2005

Datoer for studieregistrering

Først innsendt

19. september 2007

Først innsendt som oppfylte QC-kriteriene

20. september 2007

Først lagt ut (Anslag)

21. september 2007

Oppdateringer av studieposter

Sist oppdatering lagt ut (Anslag)

21. september 2007

Siste oppdatering sendt inn som oppfylte QC-kriteriene

20. september 2007

Sist bekreftet

1. september 2007

Mer informasjon

Begreper knyttet til denne studien

Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .

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