During procedural sedation, capnography provides early detection of respiratory compromise by monitoring what?

During procedural sedation, capnography provides early detection of respiratory compromise by monitoring what?

• A. End-tidal CO2 monitoring provides early detection of respiratory compromise.
• B. Oxygen saturation alone is sufficient.
• C. Blood pressure.
• D. Heart rate.

Answer: (A)

Capnography monitors the amount of carbon dioxide in exhaled air, specifically end-tidal CO2, which reflects how well a patient is ventilating. During procedural sedation, this direct ventilation measure provides an early warning of respiratory compromise long before oxygen levels drop. If ventilation worsens, the capnography waveform changes and ETCO2 can rise with hypoventilation or fall to zero if the airway becomes obstructed or disconnected, triggering prompt intervention. Relying on oxygen saturation can miss early problems because SpO2 may remain normal for a time with supplemental oxygen or reserve. Heart rate and blood pressure may change for many reasons and do not specifically indicate ventilation status, making them less reliable for early detection of respiratory compromise.

Capnography monitors the amount of carbon dioxide in exhaled air, specifically end-tidal CO2, which reflects how well a patient is ventilating. During procedural sedation, this direct ventilation measure provides an early warning of respiratory compromise long before oxygen levels drop. If ventilation worsens, the capnography waveform changes and ETCO2 can rise with hypoventilation or fall to zero if the airway becomes obstructed or disconnected, triggering prompt intervention. Relying on oxygen saturation can miss early problems because SpO2 may remain normal for a time with supplemental oxygen or reserve. Heart rate and blood pressure may change for many reasons and do not specifically indicate ventilation status, making them less reliable for early detection of respiratory compromise.