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A sub-study is an ‘add-on’ study that helps to answer specific questions within a larger research project. If you decide to participate in the CIRCA DIEM study, you or your child may be invited to take part in one of the CIRCA DIEM sub-studies.
Research
The development and refinement of a sensitive bedside test to continually measure the severity of BPD and lung development in preterm infantsGraham Jane Shannon Hall Pillow Simpson BAppSci PhD CRFS FANZSRS FThorSoc FERS BMedSci (Dist) MBBS, PhD (Dist) FRACP BMedSci (hons), PhD Honorary
Research
Pulmonary Gas Exchange Improves over the First Year in Preterm Infants with and without Bronchopulmonary DysplasiaRight shift of the peripheral oxyhaemoglobin saturation (SpO2) versus inspired oxygen pressure (PIO2) curve is a sensitive marker of pulmonary gas exchange. The aim of this study was to assess the impact of prematurity and bronchopulmonary dysplasia (BPD) on gas exchange and right-to-left shunt in the neonatal period, and its evolution over the first year of life.
Research
Neonatal high-frequency oscillatory ventilation: where are we now?High-frequency oscillatory ventilation (HFOV) is an established mode of respiratory support in the neonatal intensive care unit. Large clinical trial data is based on first intention use in preterm infants with acute respiratory distress syndrome. Clinical practice has evolved from this narrow population. HFOV is most often reserved for term and preterm infants with severe, and often complex, respiratory failure not responding to conventional modalities of respiratory support.

Research
Effect of Enteral Vitamin A on Fecal Calprotectin in Extremely Preterm Infants: A Nested Prospective Observational StudyVitamin A has anti-inflammatory and immune-modulating properties. We aimed to assess whether enteral water-soluble vitamin A supplementation in extremely preterm infants decreases fecal calprotectin, a marker of intestinal inflammation.
Research
Lung recruitment before surfactant administration in extremely preterm neonates with respiratory distress syndrome (IN-REC-SUR-E): a randomised, unblinded, controlled trialThe importance of lung recruitment before surfactant administration has been shown in animal studies. Well designed trials in preterm infants are absent. We aimed to examine whether the application of a recruitment manoeuvre just before surfactant administration, followed by rapid extubation (intubate-recruit-surfactant-extubate [IN-REC-SUR-E]), decreased the need for mechanical ventilation during the first 72 h of life compared with no recruitment manoeuvre (ie, intubate-surfactant-extubate [IN-SUR-E]).

The CIRCA DIEM Study is a multicentre study, involving several different hospital sites across Australia. Here, you can find out more about which hospitals recruit babies into the CIRCA DIEM Study.
Research
Positive End-Expiratory Pressure Levels during Resuscitation of Preterm Infants at Birth: The POLAR TrialInvestigators: Andrew Gill External collaborators: Assoc Prof David Tingay (Murdoch Children's Research Institute) The POLAR trial is an MRFF-funded