{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,7]],"date-time":"2026-09-07T22:31:45Z","timestamp":1788820305572,"version":"build-2803163510"},"reference-count":60,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2025,12,2]],"date-time":"2025-12-02T00:00:00Z","timestamp":1764633600000},"content-version":"vor","delay-in-days":1,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2025,12,1]],"date-time":"2025-12-01T00:00:00Z","timestamp":1764547200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Pediatric Pulmonology"],"published-print":{"date-parts":[[2025,12]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    <jats:bold>Rationale:<\/jats:bold>\n                    Primary ciliary dyskinesia (PCD) is a heterogeneous genetic disorder characterized by structural and functional abnormalities of motile cilia, leading to chronic oto\u2010sino\u2010pulmonary symptoms and progressive lung damage. Markers of early lung disease in PCD may help to identify individuals who may benefit from closer monitoring or earlier, more aggressive interventions. Multiple Breath Washout (MBW) offers a noninvasive assessment of ventilation distribution inhomogeneity. Whether MBW could serve as a marker of early lung disease in PCD or could be used as an efficacy endpoint in clinical trials in PCD remains to be established.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>Methods:<\/jats:bold>\n                    This narrative review evaluates current literature on the role of MBW in early detection and tracking of PCD\u2010related lung disease progression, focusing on its sensitivity compared to spirometry and to the results obtained in different PCD genotypes and phenotypes.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>Results:<\/jats:bold>\n                    Current evidence suggests that LCI outperforms spirometry in detecting early lung abnormalities, but it may also be overly sensitive in this population. The role of LCI in long\u2010term monitoring remains uncertain, requiring more longitudinal data. Alternative MBW indices, such as S\n                    <jats:sub>cond<\/jats:sub>\n                    and S\n                    <jats:sub>acin<\/jats:sub>\n                    , might offer additional insights into the source of ventilation heterogeneity but need further validation. Correlation of MBW with imaging is inconsistent, underscoring the need for integrated approaches.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>Conclusion:<\/jats:bold>\n                    MBW, particularly LCI, shows promise as a noninvasive sensitive marker of early lung disease in PCD. However, its long\u2010term utility in tracking PCD lung disease remain unclear. Further genotype\u2010stratified, longitudinal studies are needed to confirm its clinical value and optimize its application in PCD management\n                  <\/jats:p>","DOI":"10.1002\/ppul.71422","type":"journal-article","created":{"date-parts":[[2025,12,3]],"date-time":"2025-12-03T07:34:25Z","timestamp":1764747265000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Multiple Breath Washout in Primary Ciliary Dyskinesia: Potential for Lung Disease Monitoring"],"prefix":"10.1002","volume":"60","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5366-4594","authenticated-orcid":false,"given":"Michele","family":"Arigliani","sequence":"first","affiliation":[{"name":"Paediatric Respiratory Medicine, Royal Brompton and Harefield Hospitals Guy's and St Thomas' NHS Foundation Trust London UK"},{"name":"Infection, Immunity and Inflammation Research and Teaching Department UCL Great Ormond Street Institute of Child 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