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Infant Multi-Breath washout Study


Therapeutic category
the type of treatment or therapy being studied. A therapy could range from a medication addressing a particular characteristic of CF to a device or activity e.g. exercise


Trial status

Open to recruitment

Participating Centres
the different stages involved in the development of a new medication. Phase I focuses on initial safety in people. Phase 2 evaluates safety, correct dose and early signs of whether the medication works. Phase 3 is the stage before medication licensing and looks at safety and medication effectiveness. Phase 4 evaluates longer term use of a medication after it has been licensed for use

Not Applicable

Full title

Longitudinal Infant Multi-Breath washout Study (LIMBuS)

Lung Clearance Index (LCI) measured by multiple breath washout (MBW) has been shown to be a sensitive and non-invasive method of detecting early airways disease in infants with cystic fibrosis (CF). An abnormal measurement at a young age has been shown to track into later life, and could identify children that require more aggressive treatment earlier on. Currently however there is a lack of multi-centre data and of suitable scalable methodologies that can be used outside of highly specialised settings. This is a multi-centre longitudinal observational study of this measurement, LCI, in children younger than 3 years with CF, with a healthy control group and a disease group of babies who were born early. A novel method for MBW will be used, which has been developed and previously assessed in a pilot study at RMCH. We aim to show that LCI can be reliably measured across multiple centres using this method, with high rates of success and repeatability in the short term (2-3 months). We will also track any change in the children with CF and ex-premature babies in the longer term (12-18months). All parents will be consented prior to taking part in the study. The first LCI measurements on children with CF will be undertaken as soon as possible after diagnosis or recruitment, then 2-4 months and 12-18 months later. Infants who were born early (currently well, with no supplemental oxygen requirement) will have LCI close to, and ideally before NICU discharge and then 12 months later. Healthy controls under 3 years of age with no other comorbidity or respiratory concerns will be seen once whilst being sedated for other investigations. The children will be sedated as per local protocol, but at lower doses than previously used and than routinely used for scans in order to allow quicker discharge.

Trial Reference Number


Trial type


the name of the treatment or therapy being researched

Lung clearance index measurement via multi-breath washout.

Recruitment target
the number of participants who need to be recruited for the trial in the UK


Last edited date

02 July 2018

CF sponsor

University of Manchester

CF sponsor type


Who can take part?

Top inclusion criteria
  • Age less than 2 years at first assessment
  • Under the care of regional CF clinics in Manchester, Liverpool
  • No respiratory infections or courses of antibiotics in the 2 weeks prior to the study visit
Top exclusion criteria
  • Gestation at birth less than 34 weeks
  • Other neuromuscular, skeletal, metabolic or other condition that may impact on ventilation
  • History of apnoea or upper airway disorder

CF centres running this trial


Alder Hey Children's Hospital


Alder Hey Hospital Eaton Road West Derby Liverpool Merseyside L12 2AP

Recruitment starts

October 2018

Recruitment ends

March 2021


Thursfield, Rebecca

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Royal Manchester Childrens Hospital - Central Manchester University Hospitals NHS Foundation Trust


Oxford Road Manchester M13 9WL M27 4HA

Recruitment ends

March 2020



Get in touch