<prompt> Apnea in infant is10 sec20 sec30 sec40 sec  <response>: Apnea may be defined as cessation of respiraton for 20s with or without bradycardia and cyanosis or for shoer periods if it is associated with bradycardia and cyanosis.Apnea is a central problem in preterm neonates.It could be central ,obstructive, or mixed. In preterm neonates it occurs in 2-5 th day of life and is because of the immaturity of the developing brain.Central apnea can also occur due to pathological causes like sepsis,metabolic problems,temperature instability,respiratory distress, anemia ,polycytemia. Treatment:suppoive,underlying cause corrected.Drugs used include aminophylline and caffeine. Ref : ESSENTIAL PEDIATRICS,O.P.GHAI,PG NO:146,7th edition 