What role does capnography play in CPR monitoring?

What role does capnography play in CPR monitoring?

• A. What role does capnography play in CPR monitoring?
• B. Capnography is used only after ROSC.
• C. Capnography is not used in ACLS.
• D. Assesses ventilation, CPR quality, and ROSC; low ETCO2 indicates poor CPR; rising ETCO2 may indicate ROSC.

Answer: (D)

Capnography during CPR provides real-time feedback on ventilation, the quality of chest compressions, and the possibility of return of spontaneous circulation. The key metric, end-tidal CO2 (ETCO2), mirrors how much CO2 is being delivered to the lungs, which depends on both ventilation and cardiac output during compressions. When ETCO2 is low, it signals that the current CPR may be suboptimal—insufficient chest compression depth or rate, excessive pauses, or overly aggressive ventilation limiting perfusion. This prompts the team to adjust technique to improve perfusion and reduce hyperventilation. Conversely, a rise in ETCO2, or a sudden sustained increase, can indicate improving blood flow and may herald ROSC. Because capnography provides this integrated view, it is used throughout CPR to monitor ventilation, guide CPR quality, and help detect ROSC, not just after circulation is restored.

Capnography during CPR provides real-time feedback on ventilation, the quality of chest compressions, and the possibility of return of spontaneous circulation. The key metric, end-tidal CO2 (ETCO2), mirrors how much CO2 is being delivered to the lungs, which depends on both ventilation and cardiac output during compressions. When ETCO2 is low, it signals that the current CPR may be suboptimal—insufficient chest compression depth or rate, excessive pauses, or overly aggressive ventilation limiting perfusion. This prompts the team to adjust technique to improve perfusion and reduce hyperventilation. Conversely, a rise in ETCO2, or a sudden sustained increase, can indicate improving blood flow and may herald ROSC. Because capnography provides this integrated view, it is used throughout CPR to monitor ventilation, guide CPR quality, and help detect ROSC, not just after circulation is restored.