Evaluation of the methodology for the prophylaxis and correction of metabolic acidosis in patients undergoing cardiovascular surgery with cardiopulmonary bypass by Brazilian perfusionists.

Abstract

This study aimed to analyze the methods used to correct metabolic acidosis through the administration of 8.4% sodium bicarbonate during cardiopulmonary bypass (CPB), comparing the recommendations described in the literature with the practices adopted by Brazilian perfusionists. This is a cross-sectional study of an observational nature with a qualitative–quantitative approach, comprising a literature review and a field survey. Data were analyzed using the percentage-based statistical method, based on an electronic questionnaire administered to 82 perfusionists from different regions of Brazil. The results showed that 59.8% of the participants perform prophylaxis for metabolic acidosis, whereas 40.2% do not adopt this practice. It was also observed that 26.8% perform empirical correction, while 73.2% do not; this practice may be related to delays in obtaining laboratory results, since the vast majority wait for these results. It is concluded that, although there is consensus regarding the importance of maintaining acid–base balance during CPB, there is no national standardization concerning prophylaxis and the doses used.