Breath monitoring apparatus for producing a capnogram

Abstract

This apparatus produces a capnogram for a patient, comprising airflow means arrangeable such that air flowing into and out of a patient during a breathing cycle of the patient are conducted through the airflow means; a CO2 monitor (50) for repeatedly determining the presence, and level, of CO2 in the air within the airflow means; an airflow direction sensor for distinguishing between periods when air is flowing into the patient, when air is flowing out of the patient, and when air in the airflow means is stationary; a processor for producing a graph on a display of time versus an indication of CO2 levels, wherein the display includes different graphical qualities to distinguish between the level of CO2 in the air flowing out of the patient, the level of CO2 in the stationary air between breaths, and the level of CO2 in the air flowing into the patient.

Dependencies are inferred from the claim text.