Investigation into the patterns of respiratory heat and moisture exchange in intubated patients, under general anaesthesia, is detailed. This paper gives the inspiratory and expiratory temperatures and humidities found in a nonrebreathing circuit near the valve and near the trachea. A model lung was constructed to control and determine factors which have been implicated in playing a major part in heat and moisture homeostasis within the respiratory tract. Laboratory and clinical results are compared.
A biological assay was used to determine the potency of adrenaline solution 1 in 10000 soon after manufacture and again after storage at room temperature for 1 year. No deterioration in potency was observed.
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