End-tidal capnography (ETCO2) values and waveform morphology for oesophageal and tracheal intubation in four cadavers
| Cadaver | Site of intubation | ETCO2 initial kPa (mm Hg) | ETCO2 maximum kPa (mm Hg) | No. of breaths to reach maximum | ETCO2 minimum kPa (mm Hg) | Waveform morphology | Duration assessed |
|---|---|---|---|---|---|---|---|
| 1 | Oesophagus | 0 | 0 | 1 | 0 | N/A | 10 breaths |
| Trachea | 1.5 (11) | 6.2 (47) | 2 | 1.5 (11) | Normal | 2 min | |
| 2 | Oesophagus | 0 | 0 | 1 | 0 | N/A | 10 breaths |
| Trachea | 3.6 (27) | 7.2 (55) | 2 | 1.5 (11) | Normal | 2 min | |
| 3 | Oesophagus | 0 | 0 | 1 | 0 | N/A | 10 breaths |
| Trachea | 0 | 0 | 1 | 0 | N/A | 10 breaths | |
| 4 | Oesophagus | 0 | 0 | 1 | 0 | N/A | 10 breaths |
| Trachea | 0 | 0 | 1 | 0 | N/A | 10 breaths |