Arterial to end-tidal carbon dioxide tension difference during anaesthesia in early pregnancy |
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Authors: | K Bhavani Shankar H Moseley V Vemula M Ramasamy Y Kumar |
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Institution: | Department of Anaesthesia and Intensive Care, University of West Indies, Queen Elizabeth Hospital, Barbados. |
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Abstract: | Sixteen patients requiring general anaesthesia for termination of pregnancy by dilatation and evacuation of the uterus were studied. Arterial and end-tidal carbon dioxide tensions were determined during anaesthesia. The mean arterial to end-tidal carbon dioxide tension difference was 0.07 kPa (-0.02-0.16, 5-95 per cent confidence limits). These results were similar to those observed during Caesarean section and those during anaesthesia for post-delivery tubal ligations. The physiological changes such as increased cardiac output, haemodilution, and increased blood volume which manifest by 12 weeks of gestation probably result in a reduced (a-E')PCO2 value. |
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Keywords: | anaesthesia: obstetric general measurement technique: capnography |
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