Final answer:
The next step after a baby remains apneic and cyanotic following initial airway clearance and stimulation is to begin positive-pressure ventilation to ensure oxygen delivery and support respiratory function.
Step-by-step explanation:
If a baby is born apneic and cyanotic, and the initial steps of clearing the airway and stimulation have not led to improvement within thirty seconds, the next step is to begin positive-pressure ventilation. Timely initiation of ventilation is critical for a newborn that is not breathing adequately, as it helps to inflate the lungs and deliver oxygen to the body. It's essential for medical professionals to act swiftly in these situations to ensure the well-being of the newborn. Furthermore, the usage of techniques like nasal continuous positive airway pressure (CPAP) or even more advanced respiratory support with ventilators and the administration of pulmonary surfactant can be lifesaving interventions for newborns, particularly preterm infants who may have respiratory distress syndrome (RDS).