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A feasibility study to inform the design and conduct of a randomised controlled trial of high flow nasal cannula (HFNC) versus continuous positive airway pressure (CPAP) for non-invasive respiratory support in critically ill children
Full description
Breathing support is the most common intervention provided to critically ill children in a paediatric intensive care unit (PICU). Although invasive breathing support (delivered through a tracheal tube) is lifesaving, concerns regarding its risks (infection and lung damage) have prompted greater use of non-invasive respiratory support (NRS). However, there is little scientific evidence to guide PICU clinicians on the comparative effectiveness of the commonly used modes of NRS.
In this feasibility study, the investigators are testing whether it is possible to conduct a randomised clinical trial comparing two modes of NRS: continuous positive airway pressure (CPAP), which has been used for over two decades, and high flow nasal cannula (HFNC), a newer method of respiratory support. It is not known for sure how useful HFNC is in critically ill children because there is no published research comparing it with CPAP. However, since HFNC is easier to use and better tolerated by children, many hospitals are now using HFNC instead of CPAP. Before HFNC is widely adopted, a clinical trial to establish its role in the management of critically ill children is urgently needed.
As part of this study, the investigators will randomly allocate children deemed to require NRS by their treating clinician to either HFNC or CPAP. The investigators will mainly assess whether sufficient number of children can be recruited to the trial, whether clinicians are willing to randomise children, and test the proposed treatment pathways for CPAP and HFNC. The trial will run over six months, and recruit 120 sick children from three National Health Service (NHS) hospitals. Consent will be sought from parents/guardians for their children to be included in the study, usually before CPAP or HFNC is started, unless emergency life-saving treatment is required, in which case consent will be deferred until there is more time to discuss the study with parents/guardians.
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Inclusion criteria
Eligible patients will fall into one of two groups:
Group A (Step-up)
Age >36 weeks corrected gestational age and <16 years, AND
Deemed to require non-invasive respiratory support by the treating clinician for an acute illness, AND
Satisfies one or more of the following criteria:
Group B (Step-down)
Age >36 weeks corrected for gestation and <16 years, AND
Deemed to require non-invasive respiratory support by the treating clinician after extubation, following a spell of invasive ventilation
Exclusion criteria
Deemed by the treating clinician to require immediate intubation/invasive ventilation due to severe hypoxia, acidosis and/or respiratory distress, upper airway obstruction or recurrent apnoeas
Tracheostomy in place
Pre-existing air-leak syndrome (pneumothorax/pneumomediastinum)
Midfacial/craniofacial anomalies (unrepaired cleft palate, choanal atresia) or had recent craniofacial surgery
Agreed limitation of intensive care treatment plan in place ('not for intubation')
On domiciliary non-invasive ventilation prior to PICU admission
Managed on either HFNC and/or CPAP (or other form of non-invasive ventilation such as BiPAP) in the preceding 24 hours
Previously recruited to this study during the same PICU admission
Cannot be treated with HFNC
Cannot be treated with CPAP
Primary purpose
Allocation
Interventional model
Masking
121 participants in 2 patient groups
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Data sourced from clinicaltrials.gov
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