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Detection of Unsuspected Small Airways Obstruction in Cystic Fibrosis

RecruitingObservational study

The Measurement and Analysis of Maximal Expiratory Flow Volume Loops at Low Lung Volumes in Children With Cystic Fibrosis and Normal Routine Lung Function.

Who can join

Ages 5 to 40 · All sexes

Full eligibility criteria
Inclusion Criteria:

Heterozygote or homozygote patients with cystic fibrosis with normal routine pre bronchodilator spirometry including normal FEV1(L), FVC(L) and FEV1/FVC%.

Exclusion Criteria:Heterozygote or homozygote patients with cystic fibrosis with ABNORMAL routine pre bronchodilator spirometry

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About the study

Goal is to physiologically detect unsuspected small airways obstruction in children and adults with treated heterozygous and homozygous cystic fibrosis. Unsuspected refers to normal routine pre bronchodilator spirometry including normal FEV1(L), FVC (L). and FEV1/FVC%. This is a retrospective study.

What is being tested

Sponsor: Gelb, Arthur F., M.D. · Participants: 100 · Started: Apr 25, 2018

Contact the study team

Official record on ClinicalTrials.gov — NCT03839992

Locations in the U.S.

CaliforniaArthur F Gelb MD, Lakewood
Miller Children's Hospital and Long Beach Medical Center, Long Beach

Conditions

From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.