Episode 30: Arterial Blood Gas Tool

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In this episode, Dr. Igor Yankin, DACVECC introduces the new Arterial Blood Gas Analyzer inside the VetEmCrit Academy - a tool built around the question every dyspneic patient forces on you at the cage side: are the lungs failing, is this patient simply not ventilating, or both? And Why?

Igor walks through the reasoning the tool automates: the alveolar gas equation, the A–a gradient and where its published normals actually stop, the 120 rule, the P/F and S/F ratios, the oxygenation index and the oxygen saturation index, arterial oxygen content and the patient-specific cyanosis threshold, the full oxygen cascade from ambient air down to arterial blood, and the ARDSVet 2025 screen. He then moves into the practical half: the FiO₂ device estimator that works out inspired oxygen from delivery method and flow rate and names the study each estimate came from, the differential table that works through every mechanism of hypoxemia in turn and states plainly what a blood gas cannot tell you, the button that drops the whole analysis into the medical record as plain text with its caveats attached, printing, serial trending, and the 19 built-in demo cases.