The preterm infant is receiving synthetic surfactant. Which data indicates the medication is effective? 1. The infant’s heel stick capillary blood glucose level is 90 mg/dL. 2. The infant’s arterial...

The preterm infant is receiving synthetic surfactant. Which data indicates the medication is effective?

1. The infant’s heel stick capillary blood glucose level is 90 mg/dL.

2. The infant’s arterial blood gases are within normal limits.

3. The positive end-expiratory pressure (PEEP) on the ventilator is turned off.

4. The infant’s pulse oximeter reading fluctuates between 90% and 92%.