THE EFFECT OF THE RESPIRATORY FLOW PATTERN ON REBREATHING IN A T-PIECE SYSTEM

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Abstract
The effect of the respiratory flow pattern on the fresh gas flow required to prevent rebreathing in a T-piece system was investigated using laboratory models. With a sine wave pattern slighdy less than 2½ times the minute volume was necessary. With the flow patterns produced by the ventilators studied, up to 3 times the minute volume was required. It is suggested that during artificial ventilation with certain flow patterns higher fresh gas flows may be required.