Artificial ventilation in infants and young children using a new ventilator with the T-piece.

Most ~r,~eSTI~TISTS use some modification of the T-piece technique with endotracheal intubation for infants and small children. The principles have been clearly defined for spontaneous respiration by Mapleson, 1 but there is very little in the literature on the performance of this system with controlled respiration, which is far more commonly indicated, particularly in the infant. The work of Harrison 2 on an experimental model, and the findings of Nightingale, Pdchards, and Glass s on another modification of the T-piece are certainly useful contributions. The Jackson Bees' modi~cation (Fig. 1) has gone unassessed so far, though it is very commonly used because of the greater flex/bility and the "feel" it imparts to controlled respiration. The search for a suitable respirator for neonatal anaesthesia which retains the simplicity of the T-piece has been frustrating. Each anaesthetist has his own criteria, but most would demand that such a device should retain a good deal of