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CT Indexes of Emphysema and Airways in Healthy Volunteers: Normal Values; Relations With Gender, Height and Weight

19. november 2015 opdateret af: Erasme University Hospital
Various indexes have been proposed to quantify both pulmonary emphysema and airways disease on chest CT scans. It is unknown whether these indexes should be consider in absolute values or as compared to predicted normal values. The purposes of the present study is thus : a) to measure these indexes at CT in healthy volunteers; b) to investigate their relations with gender, height and weight.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

87 healthy volunteers performed consecutively a low-dose chest CT scan and pulmonary function tests:

  1. On chest CT scans, indexes reflecting pulmonary emphysema and airways measurements have been computed by using dedicated softwares. Each of our three readers performed two reading sessions.

    Relative area of lung parenchyma with attenuation value less than -960 Hounsfield Units; luminal area and wall thickness in third and fourth generations airways were recorded.

  2. Pulmonary function tests were performed: vital capacity, forced vital capacity , functional residual capacity, total lung capacity, residual volume, forced expiratory volume in one second, and diffusion lung capacity for carbon monoxide were recorded (either in absolute values and percentage of predicted values).

CT indexes were compared with gender, height and weight.

Undersøgelsestype

Observationel

Tilmelding (Faktiske)

87

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Belgien
      • Brussels, Belgien, 1070
        • Erasme University Hospital

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

18 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Healthy Volunteers

Beskrivelse

Inclusion Criteria:

  • Never smoked.
  • No respiratory infection in the 4 weeks before the begin of the study.
  • No history of pulmonary resection.
  • No active malignancy or malignancy of any organ system within the past 5 years.

Exclusion Criteria:

  • no exclusion criteria

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
Healthy Volunteers

Inclusion criteria:

  1. Aged 18 or more.
  2. Never smoked.
  3. No respiratory infection in the 4 weeks before the begin of the study.
  4. No history of pulmonary resection.
  5. No active malignancy or malignancy of any organ system within the past 5 years.
Stråling: Low-dose chest CT scans

Supine chest CT scan after full inspiration. Acquisition parameters: (Topogram 35 mA 120 kV 512 mm length)

35 quality ref mAs with care-dose ON 120 kV Pitch 1.4 Rotation time 0.33 s Acquired images 64 x 0.6 mm

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
CT index - RA960 (%)
Tidsramme: 4 hours
From acquired data, images were reconstructed using a soft algorithm. On these soft images, the relative area of lung parenchyma with attenuation value less than -960 Hounsfield Units was computed (expressed in %), as an index representative of pulmonary emphysema extent.
4 hours
CT index - LA3rd (mm2)
Tidsramme: 4 hours
From acquired data, images were reconstructed using a high resolution algorithm. On these high-resolution images, the airway lumen was measured in third generations of airways (expressed in mm2).
4 hours
CT index - LA4th (mm2)
Tidsramme: 4 hours
From acquired data, images were reconstructed using a high resolution algorithm. On these high-resolution images, the airway lumen was measured in fourth generations of airways (expressed in mm2).
4 hours
CT index - WT3rd (mm)
Tidsramme: 4 hours
From acquired data, images were reconstructed using a high resolution algorithm. On these high-resolution images, the airway wall was measured in third generations of airways (expressed in mm).
4 hours
CT index - WT4th (mm)
Tidsramme: 4 hours
From acquired data, images were reconstructed using a high resolution algorithm. On these high-resolution images, the airway wall was measured in fourth generations of airways (expressed in mm).
4 hours

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Pulmonary function tests - VC (l)
Tidsramme: 4 hours
Vital capacity was measured (expressed in l).
4 hours
Pulmonary function tests - FVC (l)
Tidsramme: 4 hours
Forced vital capacity was measured (expressed in l).
4 hours
Pulmonary function tests - FRC (l)
Tidsramme: 4 hours
Functional residual capacity capacity was measured (expressed in l).
4 hours
Pulmonary function tests - TLC (l)
Tidsramme: 4 hours
Total lung capacity was measured (expressed in l).
4 hours
Pulmonary function tests - RV (l)
Tidsramme: 4 hours
Residual volume was measured (expressed in l).
4 hours
Pulmonary function tests - FEV1 (l)
Tidsramme: 4 hours
Forced expiratory volume in one second was measured (expressed in l).
4 hours
Pulmonary function tests - DLCO (ml/min/ mmHg)
Tidsramme: 4 hours
Diffusion lung capacity for carbon monoxide was measured (expressed in ml/min/ mmHg)
4 hours

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Erasme University Hospital

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

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

1. oktober 2010

Primær færdiggørelse (Faktiske)

1. juni 2011

Studieafslutning (Faktiske)

1. juni 2011

Datoer for studieregistrering

Først indsendt

30. oktober 2015

Først indsendt, der opfyldte QC-kriterier

19. november 2015

Først opslået (Skøn)

23. november 2015

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

23. november 2015

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

19. november 2015

Sidst verificeret

1. november 2015

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • P2010/175

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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