Capnography — MCQs

A patient is undergoing MRND for laryngeal malignancy; while dissecting the venous tributaries the surgeon elevated the internal jugular vein for ligation. Suddenly the patient's EtCO2 dropped from 38 mmHg to 12 mmHg and the patient developed hypotension along with cardiac arrhythmia. Which of the following is the most likely cause?

During intraoperative period following capnograph waveform is seen. What does it signify.

Curare notch seen in capnograph is due to

Which of the following conditions does not cause a rise in end-tidal CO2 during thyroid surgery?

You are in the operating room and notice the tracing in yellow colour on this device. What does it indicate?

Endotracheal tube in the esophagus is best assessed by:

Capnography is useful for

What causes sudden decreased end tidal CO2 in GA?

Modern monitors to measure ETCO2 make use of

A patient undergoing surgery shows a sudden drop of end -tidal CO₂ (ETCO₂) to zero on capnography. What does this most likely indicate?