Sleep apnea is a condition that has long gone underdiagnosed. Millions of people struggle with disrupted sleep, chronic fatigue, and serious health risks, yet the underlying cause often remains hidden. Traditionally, diagnosing sleep apnea requires overnight polysomnography (PSG) in a sleep laboratory—a process that is expensive, time-consuming, and inconvenient for patients. But a shift is happening in respiratory diagnostics. EtCO₂ (End-Tidal Carbon Dioxide) monitoring, once reserved for anaesthesia and critical care, is now emerging as a practical and non-invasive screening tool for conditions like sleep apnea. With modern portable monitors integrating EtCO₂ sensors, early detection of breathing irregularities is becoming...