Volume not guaranteed: closed endotracheal suction compromises ventilation in volume-targeted mode.

Background: Closed endotracheal suction interferes with mechanical ventilation received by infants, but the change to ventilation may be different when ventilator modes that target expired tidal volume (VT(e)) are used.

Objective: To measure airway pressure and tidal volume distal to the endotracheal tube (ETT) during and after closed suction in a volume-targeted ventilation mode with the Dräger Babylog 8000+, and to determine the time until VT(e) returns to the baseline level.

Methods: In this benchtop study, closed suction was performed on 2.

Biphasic DC shock cardioverting doses for paediatric atrial dysrhythmias.

Objective: To determine cardioversion doses of biphasic DC shock for paediatric atrial dysrhythmias.

Design: Prospective recording of energy, pre-shock and post-shock rhythms.

Setting: Paediatric hospital.

External and internal biphasic direct current shock doses for pediatric ventricular fibrillation and pulseless ventricular tachycardia.

Objective: To determine energy dose and number of biphasic direct current shocks for pediatric ventricular fibrillation (VF) and pulseless ventricular tachycardia (VT).

Design: Observation of preshock and postshock rhythms, energy doses, and number of shocks.

Setting: Pediatric hospital.

The effect of suction method, catheter size, and suction pressure on lung volume changes during endotracheal suction in piglets.

We aimed to identify the effect of suction pressure and catheter size on change in lung volume during open and closed endotracheal suction. Anesthetized piglets (n = 12) were intubated with a 4.0-mm endotracheal tube.

The effects of closed endotracheal suction on ventilation during conventional and high-frequency oscillatory ventilation.

In newborn infants, closed endotracheal tube (ETT) suction may reduce associated adverse effects, but it is not clear whether ventilation is maintained during the procedure. We aimed to determine the effect of ETT size, catheter size, and suction pressure on ventilation parameters measured distal to the ETT. Suction was performed on a test lung, ventilated with conventional (CMV) and high-frequency oscillatory ventilation (HFOV) using ETT sizes 2.

Negative tracheal pressure during neonatal endotracheal suction.

Endotracheal tube (ETT) suction is the most frequently performed invasive procedure in ventilated newborn infants and is associated with adverse effects related to negative tracheal pressure. We aimed to measure suction catheter gas flow and intratracheal pressure during ETT suction of a test lung and develop a mathematical model to predict tracheal pressure from catheter and ETT dimensions and applied pressure. Tracheal pressure and catheter flow were recorded during suction of ETT sizes 2.

A comparison of the effectiveness of open and closed endotracheal suction.

Objective: To compare the effectiveness of open and closed endotracheal suction in recovering thin and thick secretions in normal and injured lungs during conventional and high frequency ventilation.

Design And Setting: Randomised study in a paediatric intensive care model in the animal research laboratory of a tertiary paediatric hospital.

Subjects: 16 New Zealand White rabbits.