Table 1 Reference values for PO2, oxygen saturation and PCO2
From: Guidelines for diagnosis and management of congenital central hypoventilation syndrome
Measurement | Reference values | Comments |
|---|---|---|
Oxygenation | ||
 Arterial oxygenation (SpO2) | ≥ 95% | In room air / no supplemental O2 Ensure there is good detection of pulse waveforms to exclude movement artefacts or inadequate pulse detection |
 Transcutaneous PO2 (TcPO2) Arterial/Capillary PO2 | 80–100 mmHg 10.7–13.3 kPa | In-hospital use only Change site of the heated probe according to manufacturer’s recommendations |
Carbon Dioxide | ||
Transcutaneous (TcPCO2)/ Arterial/Capillary PCO2 | 35–45 mmHg 4.7–6.0 kPa | Change site of the heated probe according to manufacturer’s recommendations |
End-tidal CO2 (ETCO2) | 30–40 mmHg 4.0–5.3 kPa | Measured at the nose or tracheostomy cannula Technically difficult, requires end-tidal plateau |