What does the capnography waveform represent?

The capnography waveform is a graphical representation of the concentration of carbon dioxide (CO2) in exhaled air over time. It provides critical information about the patient's respiratory status. The primary focus of capnography is on monitoring the levels of CO2, which can indicate how well carbon dioxide is being eliminated from the body during respiration.

By analyzing the shape and phases of the waveform, healthcare providers can gain insights into various respiratory processes, such as the effectiveness of ventilation and the presence of any abnormalities in gas exchange. In situations like cardiac arrest or respiratory distress, an unexpected change in the capnography waveform can alert providers to issues such as hypoventilation or re-establishment of circulation after CPR.

The other options describe concepts that are not the primary purpose or function of capnography. While the movement of oxygen and airflow obstruction relate to respiratory dynamics, they are not specifically what the capnography waveform measures. Additionally, the depth of anesthesia may involve monitoring other parameters that are not directly depicted by capnography. Hence, the best interpretation of the capnography waveform centers on the movement and measurement of carbon dioxide through the respiratory system.