Respiratory crises in the field rarely fit textbook categories. JEMS Development Editor Mike Brown talks with Hamilton Medical’s Jesse Carroll to separate Type 1 (hypoxemic) from Type 2 (hypercapnic) respiratory failure and recognize the mixed presentations clinicians actually see. They walk through practical cues (SpO2 trends vs end‑tidal CO2), common causes (CHF, COPD, obesity, neuromuscular weakness), and epidemiology: roughly 360,000 prehospital respiratory calls annually with 41% involving COPD and obesity rates rising from 32% to about 60% since 1988. Jesse explains why pressure, flow and volume, not oxygen alone, drive meaningful physiologic change, how device limitations (disposable CPAP, pneumatic and turbine systems) affect flow delivery, and when early noninvasive strategies can buy time or prevent intubation.