What does the term "end tidal CO2" monitor?

The term "end tidal CO2" monitor specifically measures the concentration of carbon dioxide (CO2) in exhaled air. This measurement provides valuable insight into a patient's ventilation status. When a person exhales, the CO2 concentration in the exhaled air can indicate how effectively the lungs are removing this gas from the bloodstream. High levels of CO2 can suggest hypoventilation, while low levels may indicate hyperventilation or insufficient CO2 production. Monitoring end tidal CO2 is crucial in various clinical settings, such as during anesthesia or in emergency situations, to assess respiratory function and ensure that adequate ventilation is maintained.

The other options relate to different physiological measurements that do not pertain to the end tidal CO2 monitor. For example, blood pressure in the lungs, oxygen levels in the blood, and body temperature during respiration are assessed using different methods and tools, highlighting the specific functionality of CO2 monitoring.