Catheters for paediatric endotracheal suction were studied using an artificial lung with compliances in the range encountered in paediatric practice.
With various combinations of “lung” compliance, size of endotracheal tube, endotracheal connector and catheter,” tracheal” pressure and air flow between endotracheal tube and catheter were measured.
Recommendations for combinations of endotracheal tube, connector and catheter size are made. The maximum negative pressure applied to the catheter should be limited.
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