ARF & ARDS Review 2026 – 55 Questions – BIOL 2402 – Respiratory Failure, Ventilation, P/F Ratios

This concise and clinically-focused document presents 55 exam-style questions and verified answers covering key concepts in Acute Respiratory Failure (ARF) and Acute Respiratory Distress Syndrome (ARDS), aligned with BIOL 2402 – Anatomy and Physiology II or advanced respiratory care and critical care nursing courses. Based on “Anatomy & Physiology” by Kenneth S. Saladin and contemporary respiratory care protocols, the content explores both hypoxemic and hypercapnic respiratory failure, including diagnostic indicators like PaO₂, PaCO₂, ABG interpretation, and oxygenation strategies. Students will learn to differentiate ARF causes such as V/Q mismatch, shunt, alveolar hypoventilation, and diffusion impairment, as well as how to respond to clinical signs including cyanosis, crackles, and abnormal breath sounds. In the ARDS section, the material covers: Pathophysiologic phases: Exudative, proliferative, fibrotic P/F ratios and severity classifications (mild, moderate, severe) Ventilation management: low tidal volume, permissive hypercapnia, pressure-controlled modes PEEP, prone positioning, NMBA use, and indications for ECMO Each question is answered clearly and accurately, making this a high-yield resource for: Nursing, respiratory therapy, pre-med, and critical care students Learners preparing for A&P II exams, pathophysiology units, or clinical skills evaluations Those seeking a practical review of respiratory emergency management protocols All questions are graded A+ and structured in a Q&A format for effective recall and test-readiness. Keywords: ARF, ARDS, acute respiratory failure, PaO2, PaCO2, hypoxemia, hypercapnia, P/F ratio, low tidal volume ventilation, mechanical ventilation, prone positioning, ECMO, ABG analysis, V/Q mismatch, shunt, respiratory therapy, BIOL 2402, Saladin, critical care, lung injury, ARDS phases