Question 168 · LEK · EtCO₂ and capnography
Indicate the true statement concerning capnography (ETCO2) used during chest compressions in the course of CPR:
- A. values of ETCO2 < 10 mmHg after 20 minutes of CPR suggest good outcome of the treatment.
- B. values of ETCO2 are prognostically irrelevant during CPR.
- C. values of ETCO2 are independent of the depth of chest compressions.
- D. it helps to monitor the frequency of chest compressions.
- E. it may allow to diagnose the return of spontaneous circulation (ROSC) during CPR.
Hint
Consider what happens to CO2 delivery to the lungs when the heart suddenly starts pumping effectively again.
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