“…The higher success rate in the present study when compared with the landmark technique of the studies by Troianos et al, [24] Denys et al, [25] and Turker et al, [2] is difficult to explain, but it may be due to different level of experience and the fact that in the present study, the cannulations were performed in anesthetized and mechanically ventilated patients, whereas in all the above mentioned studies, the patients were spontaneously breathing. Our results are in accordance with the study by Sznajder et al, [7] which shows higher success rate and lower complication rates by even inexperienced physicians in mechanically ventilated patients than in spontaneously breathing patients. Application of positive end expiratory pressure in mechanically ventilated patients also increases the cross sectional area of IJV and facilitates cannulation.…”