endotracheal intubation (ETI) during child mannikin resuscitation with uninterrupted chest compressions. In order to simulate the difficulties associated with intubation during uninterrupted chest compressions, CPR was performed by using LUCAS-2 (Physio-Control, Redmond, WA, U.S.).

Endotracheal intubation of child mannikin during resuscitation without chest compressions.

direct laryngoscopy

effectiveness of the first, second and third intubation attempts and overall effectiveness of intubation by participants using four intubation devices.

time from insertion of the blade to the first manual ventilation of the manikin´s lungs. If time of intubation is over than 60 seconds, attempt was recognized as failure.If the examinee failed at all attempts, the case was excluded from the time calculations.

self reported Cormack-Lehan scale during intubation