Thirty neonatal healthcare professionals who successfully completed the Neonatal Resuscitation Program performed CPR using ( i ) 3:1 compression : ventilation ( C : V ) ratio , ( ii ) continuous CC with asynchronous ventilation ( CCaV ) at a rate of 90 CC per min and ( iii ) CCaV at 120 CC per min for a duration of 10 min on a neonatal manikin .