If capnography were in use, an ETCO2 level of would indicate to the team that there could be a problem with the quality of chest
compressions.

If capnography were in use, an ETCO2 level of less than 10 mmHg would indicate to the team that there could be a problem with the quality of chest compressions.

Explanation:

Capnography is a non-invasive method to measure the concentration or partial pressure of carbon dioxide (CO2) in respiratory gases, which represents a sensitive index of the patient's breathing quality. A capnography monitor is used for measuring end-tidal CO2 (​EtCO2) at the end of exhalation. The normal ETCO2 values in adult patients range from 35-45 mmHg. A low ETCO2 value may be indicative of poor systemic perfusion (i.e., the heart is unable to supply sufficient oxygen-rich blood to the tissues), which can be caused by hypovolemia, sepsis,  dysrhythmias, etc. High-quality chest compressions are achieved when ETCO2 is at least 10-​20 mmHg.