COMPARISION OF TRADITIONAL VERSUS STEWART APPROACH BY ARTERIAL BLOOD GAS ANALYSIS

Abstract

Background: Acid-base disorders are commonly evaluated using the traditional Henderson-Hasselbalch approach, which focuses on pH, partial pressure of carbon dioxide (Pco2), and bicarbonate (Hco3) levels. In contrast, the Stewart approach, based on physicochemical principles, emphasizes the role of electrolytes and the strong ion difference (SID) in acid-base homeostasis. This study aims to compare these two methods of arterial blood gas (ABG) analysis in identifying acid-base disturbances in a retrospective cohort of 30 patients.