Interpretation of Individual Waveforms

Interpretation of Individual Waveforms

There is a lot to be learned from the capnograph and several cases are investigated in this video.

A normal capnograph has become a “gold standard” for confirming the correct placement of an endotracheal tube.

It is important to recognize that immediately following the intubation, the partial pressure of CO2 may be relatively high -but that this can be normalized with appropriate management of ventilation.

The DOPE mnemonic is discussed:

D – displacement

O – obstruction

P – pneumothorax

E – equipment failure.

Excessive carbon dioxide in the blood is hypercapnia and can be corrected by increasing the ventilatory rate.

C

Too little carbon dioxide in the blood is called hypocapnia and is corrected by decreasing the respiratory rate.

 

There are a couple of ways that capnography is useful in the management of cardiac arrest:

the partial pressure of CO2 can be used to measure the efficacy of chest compressions

And, a sudden increase in the partial pressure of CO2 can be indicative of a return of spontaneous circulation.

 

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