Midline cut, face to the left. Choose a device, watch it go in, and see where the tip ends up.
Waveform capnography--mmHg ETCO₂--breaths/min
- Idead-space gas, no CO₂
- IICO₂ rises as alveolar gas arrives
- IIIplateau of alveolar gas
- ETCO₂peak at the end of the plateau
- 0inspiration, back to baseline
Stylized teaching illustration, not CT-derived and not medically reviewed. Lengths are on a schematic scale of the drawing; check them, the steps and the contraindications against your device chart and Egan’s before class. For intubation, the drawing is compressed, so depth is scaled so that 25 cm at the lips reaches the carina; placement is judged against the landmarks.