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Correspondence |
Evaluating acid-base disorders
Holy Name Hospital Teaneck USA e-mail: rc18@columbia.edu
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Sir,
In their review of acid-base disturbances in cholera, Zalunardo et al. illustrate the limitations of the conventional approach when dealing with complex clinical situations.1 The patient with cholera was thought to have both contraction metabolic alkalosis and metabolic acidosis from bicarbonate losses in diarrhoea, with the combination leading to a relatively normal arterial pH, PCO2, and plasma bicarbonate concentration. A different approach to these issues was introduced by Stewart2,3 and supported by Fencl4 and Kellum,5 among others. In this development, acid-base disorders can be considered to arise from alterations in three independent variables:
St Michael's Hospital University of Toronto Canada