منابع مشابه
Measurement of breath-by-breath gas exchange during general anaesthesia.
We describe a single flow transducer breath-by-breath gas exchange measurement system suitable for use during general anaesthesia. The system uses a Fleisch No. 2 pneumotachograph, a mass spectrometer and a microcomputer to give real-time continuous measurements. Correction for apparent gas exchange attributable to changes in gas stored in the lung (functional residual capacity) is available. T...
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The nature of dense areas in dependent lung regions regularly seen in anaesthetized humans was examined in a sheep model. During anaesthesia with muscle paralysis and mechanical ventilation dense areas in dependent lung regions could be seen by means of computerized tomography (CT). They had the same location and the same attenuation as in anaesthetized humans. Gas exchange impairment tended to...
متن کاملInfluence of age on atelectasis formation and gas exchange impairment during general anaesthesia.
We have studied the effects of anaesthesia on atelectasis formation and gas exchange in 45 patients of both sexes, smokers and nonsmokers, aged 23-69 yr. None of the patients showed clinical signs of pulmonary disease, and preoperative spirometry was normal. In the awake patient, partial pressure of arterial oxygen (PaO2) decreased with increasing age (P less than 0.001) and the alveolar-arteri...
متن کاملBiologically variable ventilation prevents deterioration of gas exchange during prolonged anaesthesia.
We have studied the time course of changes in gas exchange and respiratory mechanics using two different modes of ventilation during 7 h of isoflurane anaesthesia in pigs. One group received conventional control mode ventilation (CV). The other group received biologically variable ventilation (BVV) which simulates the breath-to-breath variation in ventilatory frequency (f) that characterizes no...
متن کاملVentilation and gas exchange during anaesthesia and surgery in spontaneously breathing infants and children.
Minute ventilation (VE) (ml min-1), respiratory frequency (f), mixed expired carbon dioxide fraction (FECO2) and end-tidal carbon dioxide concentration (E'CO2) (%) were measured, and alveolar ventilation (VA), deadspace (VD), deadspace/tidal volume ratio (VD/VT) and carbon dioxide output (VCO2) calculated in 58 anaesthetized, spontaneously breathing infants and children weighing 2.8-20.5 kg. Al...
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ژورنال
عنوان ژورنال: British Journal of Anaesthesia
سال: 1990
ISSN: 0007-0912
DOI: 10.1093/bja/64.4.507