Medical providers have long used pulse oximeters as a quick and easy way to assess blood oxygen levels. However, the amount of CO2 a person expires is an equally useful piece of information that provides key details about ventilation. Capnography provides clear data about the amount of CO2 expired at each stage of respiration. Using capnography during medical suction can reduce the risk of hypoxia and provide additional details about patients at risk of serious suction-related complications.