ABGuru is the study tool for arterial blood gas (ABG) interpretation. Enter pH and pCO2 and get a complete acid-base analysis in seconds, automatically adapted to your training level. Built for medical students, residents, specialist physicians, and critical care nurses who want to deepen their understanding of ABG pathophysiology — on the ward, in the library, or before an exam. THREE LEARNING LEVELS Explanations automatically adapt to your profile: • Medical Student — core concepts, reference values, basic interpretive logic • Resident — pathophysiology, differential reasoning, clinical correlations • Specialist Physician — advanced technical detail, compensation formulas, practical implications WHAT THE APP CALCULATES • Acid-base disorder type (23 zones in the pH/BE plane, Siggaard-Andersen method) • Calculated Base Excess and HCO3- • Expected compensation with adequacy assessment • Anion gap and delta ratio • Alveolar-arterial gradient (A-a) • P/F ratio and ARDS severity (Berlin criteria) • Lactate analysis • Arterial oxygen content (CaO2) • Automatic correction for venous samples • Interactive Davenport diagram TEACHING CARDS Every parameter has an info button (i) that opens a card with explanation, reference ranges, and cited scientific sources — Siggaard-Andersen, Berend, Schlichtig, Emmett & Narins, and others. PRIVACY The app does not collect, transmit, or store any personal or health data. Everything stays on your device. IMPORTANT NOTICE ABGuru is an exclusively educational application. It is not a medical device and is not intended to support decisions about real patients.