COPD, chronic obstructive pulmonary disorder, and CHF, congestive heart failure, both have similar symptoms and risk factors. When a physician takes the vitals of the patient, the heart rate, respiratory rate, and blood pressure all may correlate to COPD, CHF, or even both sometimes. When looking at what the disorders actually impact makes them very different however. COPD generally affects the lungs, while CHF is a disorder from the heart. Smoking for example is a risk factor for both COPD and CHF. Smoking increases the risk of bronchitis and emphysema, the two conditions of COPD. Smoking may also increase the risk of heart failure and heart disease.

The entitled CO2 machine can better differentiate the breathing rates of these patients, while seeing whether the diagnoses of the patient is either COPD, CHF, or both. It allows us to see the rate of carbon dioxide being let out during exhalation of the patient.