Capnography Waveforms

Sudden loss of waveform

 • ET tube disconnected, dislodged, kinked or obstructec

 • Loss of circulatory function

Decreasing EtCO2

 • ET tube cuff leak

 • ET tube in hypopharynx

 • Partial obstruction

CPR Assessment

 • Attempt to maintain minimum of 10mmHg

Sudden increase in EtCO2

 • Return of spontaneous circulation (ROSC)

Bronchospasm ("Shark-fin" appearance)

 • Asthma

 • COPD

Hypoventilation

Hyperventilation

Decreased EtCO2

 • Apnea

 • Sedation





#Diagnosis #CriticalCare #Capnography #Waveforms #Interpretation #ETCO2 #EndTidalCO2 #pulmonary