SAQ 833 – Anaesthetics – capnography interpretation in ED

Capnography is a vital form of monitoring in the ED. A normal CO2 waveform is shown below.

State three (3) of the most important common uses of ED capnography.

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On the normal waveform, which interval (for example A-B, B-C, C-D or D-E) contains the period of dead-space ventilation?

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In the table, state conditions that can cause abnormal EtCO2 values. Give only one unique example for each box.

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</p> <table class="saq-prop-table"> <thead> <tr> <th>Aetiology</th> <th>Low EtCO2</th> <th>High EtCO2</th> </tr> </thead> <tbody> <tr> <td>Metabolic</td> <td></td> <td></td> </tr> <tr> <td>Respiratory</td> <td></td> <td></td> </tr> <tr> <td>Circulation</td> <td></td> <td></td> </tr> <tr> <td>Equipment</td> <td></td> <td></td> </tr> </tbody> </table> <p>

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