Question

But the colorimetric co2 detector does not turn yellow. What is the likely reason for this.

Answer 1

The reason why the colorimetric CO₂ detector does not turn yellow is because; The endotracheal tube is not in the trachea and as such the patient is not exhaling CO₂

Usage of Colorimeter Detector

The colorimetric CO₂  detector is simply a device that shows the existence of exhaled CO₂

Now, the colorimetric CO₂ detector has a pH-sensitive filter that could change color when it gets into contact with the CO₂ exhaled by the patient.

Thus, when the patient is not exhaling CO₂ , the pH filter will turn to purple and when the patient is exhaling CO₂ , the pH filter turns yellow.

The complete question is;

You are resuscitating a critically ill newborn whose heart rate is 20 bpm. The baby has been intubated and the endotracheal tube insertion depth is correct. You can see chest movement with PPV and hear bilateral breath sounds, but the colorimetric CO₂ detector does not turn yellow. What is the likely reason for this?

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