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Table 3 Perioperative arterial blood gas analysis and systemic stress response

From: Effects of pressure-controlled and volume-controlled ventilation on respiratory mechanics and systemic stress response during prone position

	Group PC (n = 27)	Group VC (n = 27)	p value
PaO₂ (mmHg)
PRE	83.8 ± 8.5	84.0 ± 10.4	NS
PRONE	171.8 ± 47.3	156.0 ± 48.8	NS
POST	91.4 ± 8.0	83.5 ± 6.2	<0.001
PaCO₂ (mmHg)
PRE	39.3 ± 5.9	39.8 ± 6.7	NS
PRONE	36.5 ± 6.0	37.9 ± 5.6	NS
POST	39.4 ± 4.2	39.4 ± 4.4	NS
pH
PRE	7.39 ± 0.05	7.37 ± 0.05	NS
PRONE	7.39 ± 0.05	7.37 ± 0.05	NS
POST	7.39 ± 0.05	7.38 ± 0.05	NS
Cortisol (mg/dL)
PRE	11.45 ± 5.08	11.98 ± 4.76	NS
PRONE	17.77 ± 5.66	21.82 ± 6.61	0.016
POST	12.54 ± 6.45	22.92 ± 8.72	<0.001
Insulin (μU/mL)
PRE	6.10 ± 3.33	4.81 ± 3.69	NS
PRONE	6.19 ± 5.01	5.65 ± 5.01	NS
POST	12.8 ± 15.9	11.1 ± 12.7	NS
Glucose (mg/dL)
PRE	84.0 ± 14.5	79.5 ± 14.6	NS
PRONE	103.5 ± 25.1	105.8 ± 17.3	NS
POST	102.6 ± 19.2	113.8 ± 16.0	0.028
Lactate (mmol/L)
PRE	2.28 ± 0.84	1.94 ± 0.83	NS
PRONE	2.59 ± 0.87	2.85 ± 0.70	NS
POST	2.08 ± 0.82	2.17 ± 0.72	NS

PaO ₂ arterial oxygen pressure, PaCO ₂ arterial carbon dioxide pressure, PRE: preoperative values, PRONE values during surgery in prone position, POST postoperative values, NS not significant (p > 0.05)
p < 0.05: statistically significant

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