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Table 2 Intra-operative blood gas analysis in patients randomly allocated to high-flow nasal oxygen therapy (HFNT) or standard oxygen therapy (SOT) during sedation for transcatheter aortic valve replacement. Values are median (IQR [range])

From: High-flow nasal oxygen vs. standard oxygen therapy for patients undergoing transcatheter aortic valve replacement with conscious sedation: a randomised controlled trial

Variable

Oxygen therapy

Baseline

30 min

p value

pO2; kPa

Standard oxygen therapy

15.45 (12.17–19.33 [9.2–22.8])

14.20 (11.80–19.40 [9.7–35.1])

0.69

 

High-flow nasal oxygen therapy

12.10 (10.05–15.22 [7.2–29.8])

13.69 (10.85–18.38 [8.5–32.3])

0.067

pCO2; kPa

Standard oxygen therapy

6.15 (5.65–6.93 [2.0–8.7])

6.0 (5.65–7.30 [4.8–9.3])

0.0044

 

High-flow nasal oxygen therapy

5.85 (5.18–6.23 [3.4–7.3])

5.85 (5.30–6.53 [4.1–10.2])

0.043

FiO2

Standard oxygen therapy

0.3 (0.3–0.3 [0.28–0.5])

0.3 (0.3–0.3 [0.29–1.0])

0.388

High-flow nasal oxygen therapy

0.3 (0.3–0.3 [0.3–0.4])

0.3 (0.3–0.4 [0.3–0.5])

0.296

  1. SD Standard deviation, IQR Interquartile range, pCO2 Arterial partial pressure of carbon dioxide, pO2 Arterial partial pressure of oxygen, FiO2 Inspiratory fraction of oxygen