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Table 4 Arterial blood gas analyses

From: Comparison of volume-controlled ventilation mode and pressure-controlled ventilation with volume-guaranteed mode in the prone position during lumbar spine surgery

 

Group

15 min after induction

15 min after positioning

30 min after positioning

Supine at the end

pH

VCV

7.44 (7.42–7.45)

7.44 (7.41–7.47)

7.44 (7.42–7.46)

7.42 (7.38–7.45)

PCV-VG

7.43 (7.41–7.48)

7.43 (7.42–7.45)

7.42 (7.40–7.47)

7.41 (7.39–7.45)

PaO2 (mmHg)

VCV

242 (209–285)

252 (237–271)

258 (234–272)

216 (192–255)

PCV-VG

209 (177–248)

234 (215–260)

233 (218–259)

230 (215–262)

PaCO2 (mmHg)

VCV

32 (30–34)

31 (30–33)

31 (30–33)

34 (31–36)

PCV-VG

34 (31–35)

33 (31–35)

34 (31–35)

35 (32–38)

SaO2 (%)

VCV

99.9 (99.8–99.9)

99.9 (99.8–99.9)

99.9 (99.8–99.9)

99.8 (99.7–99.9)

PCV-VG

99.8 (99.6–99.9)

99.9 (99.8–99.9)

99.8 (99.8–99.9)

99.8 (99.8–99.9)

  1. PaO2 partial arterial oxygen tension, PaCO2 partial arterial carbon dioxide tension, VCV volume-controlled ventilation, PCV-VG pressure-controlled ventilation with volume guaranteed
  2. Data are listed as the median (interquartile range)