The NEU-STIM Trial (NEU-STIM)

A Randomised Trial of Repetitive Versus Selective Tactile Stimulation for Preterm Infants at Birth: The NEU-STIM Trial

The aim of this study is to determine the effect of repetitive tactile stimulation compared to selective stimulation on oxygenation of the infant at 5 minutes after birth. Infants born before 32 weeks of gestation will be included in this trial. This is a stepped-wedge cluster randomised controlled trial. The participating centre, rather than the individual infant, will be the unit of randomisation. This design is appropriate to test the effect of an intervention that encompasses a behavioral aspect - in this case the performance of tactile stimulation.

Rationale: A randomised study demonstrated that preterm infants who received repetitive stimulation at birth (10 second episodes of stroking of the soles of the feet and/or back, followed by 10 seconds rest) showed an increase in respiratory effort. This may in turn improve clinical outcomes as improved breathing effort may reduce the need for invasive respiratory support. Tactile stimulation can be immediately and easily performed at birth at no extra cost. It therefore has great potential to be implemented in delivery rooms (DRs) worldwide. Objective: To determine the effect of repetitive tactile stimulation compared to selective stimulation on oxygenation of the infant at 5 minutes after birth. Study design: This is a stepped-wedge cluster randomised controlled trial. The participating centre, rather than the individual infant, will be the unit of randomisation. This design is appropriate to test the effect of an intervention that encompasses a behavioral aspect - in this case the performance of tactile stimulation. Study population: Infants born before 32 weeks of gestation will be included in this trial. Intervention: At the start of the study, each participating centre will perform selective tactile stimulation in accordance with international guidelines, as is their usual practice. Clinicians will gently rub the back, chest, extremities or soles of the feet if they consider the breathing of the infant to be insufficient or absent. In the second stage of the study, centres will be randomised to switch their stimulation approach to repetitive stimulation. Clinicians will then gently rub the back, chest, extremities or soles of the feet for 10 seconds. To avoid extinction of the stimulatory effect (reflex), every 10 second period of stimulation will be followed by 10 seconds of rest (no stimulation). Repetitive stimulation will be performed for the first 5 minutes of life, or longer if the breathing is still considered insufficient or absent. Main study parameter: The proportion of infants with pre-ductal oxygen saturation (SpO2) ≥ 80%.

This is a stepped-wedge cluster randomised controlled trial. The participating centre, rather than the individual infant, will be the unit of randomisation.

Centres will be randomised for the fortnight at which they will switch their tactile stimulation practice from selective stimulation to repetitive stimulation. The analysing researcher will be blinded for the allocation of treatment switch.

At the start of the study, selective tactile stimulation will be performed at each participating centre in accordance with international guidelines. Clinicians will gently rub the back, chest, extremities or soles of the feet if they consider the breathing of the infant to be insufficient or absent. All other procedures in the delivery room and NICU will be performed according to international and local guidelines.

For each centre, a lot will be drawn which indicates the month in which the protocol for tactile stimulation changes from selective stimulation to repetitive stimulation. Repetitive stimulation is defined as gently rubbing the soles of the feet, back, chest, or extremities for 10 seconds. To prevent extinction of the stimulatory effect (reflex), every 10 second period of stimulation will be followed by 10 seconds rest (no stimulation). The repetitive stimulation will be performed for the first 5 minutes after birth, or longer if the breathing is still considered insufficient or absent. All other procedures in the delivery room and NICU will be performed according to international and local guidelines.

Inclusion Criteria: Infants born before 32 weeks of gestation can be included in this trial after parental consent. Exclusion Criteria: Infants will be excluded if they are found to have a congenital abnormality or condition that has an adverse effect on breathing/ventilation or oxygenation, including: congenital diaphragmatic hernia, trachea-oesophageal fistula, cyanotic heart disease and surfactant protein deficiency. Many of the infants enrolled in the study will later be diagnosed with respiratory distress syndrome (RDS); this will not render them ineligible for inclusion.