What does capnography measure?

Capnography specifically measures the levels of carbon dioxide (CO2) in exhaled air. It provides valuable insights into a patient's ventilation status, reflecting not only the adequacy of ventilation but also the metabolism and perfusion of the tissues. This measurement is critical in various clinical settings, such as during anesthesia, critical care, and respiratory therapy, as it helps in monitoring a patient's respiratory function. By analyzing capnography data, healthcare providers can make informed decisions regarding respiratory support and potential interventions needed for patients who are at risk of respiratory failure. Other options, while important in their own contexts, do not pertain to capnography's specific function, which concentrates on CO2 levels.