A Volume-Preset Device for Mechanical Ventilation of Infants and Children

Abstract

A bag-in-bottle system for mechanical ventilation of infants and children is described. It is a modification of the C.l.G. Vent-Viva, which may be driven by an adult ventilator such as the Bennett P.R.2 or the Bird }vf ark 7.

Evaluation of Infant Ventilators

“…This is because a one-way valve is not used in the circuit and, at the moment the inspiratory valve opens, the pressure in the lung with PEEP applied is higher than the pressure in the bellows and so there is momentary backflow until the bellows pressure builds up to this value. This effect is prevented in the other ventilator by the oneway valve that is necessary on the inspiratory side of the circuit between the bellows and the patient (Fisk et al 1974).…”

“…• . bottle attachment fitted with a small bellows designed for use with children (Fisk et al 1974). This combination acts as a time-cycled volume pre-set machine.…”

The Stocks Suction Bullet

“…It consists of the modified Vent-Viva (CIG Mc. :.iishield) ventilator system (Fisk et al 1974) as used in clinical practice at the Prince of Wales Hospital, connected to an artificial lung. A ventilator (Bird Corporation, Palm Springs, CA USA) was used to drive the bagin-bottle which filled from a reservoir and ventilated the "lung" through a plastic tube representing a "trachea".…”