Halothane-air anaesthesia using the “pulmotec” apparatus preliminary report

Macartney, H. H.

doi:10.1007/bf03028119

Cited by 7 publications

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“…In their series the average of arterial oxygen saturations in the group in which ventilation was controlled was 94.3 per cent but only 90.7 per cent in the group in whom respiration was spontaneous. A similar unit for halothane-air anaesthesia was described by Macartney (1961), and in 102 consecutive cases the arterial blood appeared satisfactorily pink as long as ventilation was maintained in accordance with Radford's nomogram. More precisely, Cole and Parkhouse (1961) showed in sixty-two cases in which ventilation was controlled using volatile agents in air, that oxygenation levels within 2 per cent of resting levels were maintained in 92 per cent.…”

Section: Discussionmentioning

confidence: 91%

“…The versatility of the EMO ether Inhaler (Epstein and Macintosh, 1956) and its physical principles have led to many reports of experiences or recommendations about the use of similar units vaporizing volatile agents in air in a non-rebreathing system (Parkhouse and Simpson, 1959;Ikezono et al, 1959;Soper, 1959Soper, , 1961Papantony and Landmesser, 1960;Hingson, 1961;Cole and Parkhouse, 1961;Macartney, 1961;Merrifield, 1961;Safar and Gedang, 1961;Pearson and Safar, 1961). The limitation in the oxygen tensions in the inhaled air when using these techniques raises questions concerning the degree of ventilation required to maintain arterial oxygen saturations at normal levels.…”

Section: Discussionmentioning

confidence: 99%

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Human Oxygenation by Air During Anaesthesia: The Relation of Ventilatory Volume and Arterial Oxygen Saturation

1963

British Journal of Anaesthesia

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Ventilation and arterial oxygen saturation have been measured in 18 patients during anaesthesia with ether or halothane carried in air. All patients were ventilated artificially with a Jefferson ventilator at a frequency of 16 breaths per minute and variable tidal volume. Ventilation has been expressed as a percentage of Radford's standard, Nunn's standard and the patient's pre-operative resting ventilation. 110 per cent of both Radford's and Nunn's standard ventilation and 98 per cent of the patient's own resting ventilation were found to yield a mean arterial oxygen saturation of 95 per cent. Below this the mean saturation fell sharply with decreasing ventilation. Cyanosis was never visible even with a saturation as low as 70 per cent, although desaturation was evident in the colour of the arterial blood when sampled.

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Section: Discussionmentioning

confidence: 91%