Blood gas, glucose, lactate, and hemoglobin values in the preoperative and postoperative periods in the two populations
| All patients (n=122) | Apnea group (n=12) | No apnea group (n=110) | P value | |
| Admission | ||||
| pH | 7.42±0.08 (7.42, 7.37–7.47) | 7.46±0.08 (7.44, 7.42–7.46) | 7.42±0.08 (7.41, 7.37–7.47) | 0.18 |
| pCO2, mm Hg | 43.58±9.58 (44.00, 38.60–49.00) | 40.26±7.33 (40.30, 33.28–45.75) | 43.89±9.75 (44.00, 39.00–49.00) | 0.30 |
| HCO3, mmol/L | 27.48±5.11 (27.00, 24.40–29.87) | 29.05±6.14 (27.70, 25.30–32.75) | 27.32±5.01 (27.00, 24.10–29.75) | 0.36 |
| BE, mmol/L | 3.96±5.94 (3.30, 0.40–6.20) | 4.70±6.27 (3.70, 0.52–7.65) | 3.89±5.94 (3.30, 0.40–6.00) | 0.71 |
| Lactate, mmol/L | 3.04±1.59 (2.65, 1.87–3.75) | 3.86±2.45 (2.70, 2.30–5.80) | 2.96±1.48 (2.55, 1.87–3.70) | 0.13 |
| Glucose, mg/dL | 88.18±30.51 (87.00, 77.00–96.00) | 82.71±28.94 (70.00, 66.00–88.00) | 88.64±30.76 (87.00, 77.25–96.00) | 0.60 |
| Hemoglobin, g/L | 127.5±28.6 (124.5, 105.3–143.8) | 130.9±22.6 (128.0, 116.0–139.5) | 127.2±29.2 (123.0, 103.5–146.8) | 0.72 |
| Preoperative | ||||
| pH | 7.42±0.06 (7.42, 7.39–7.45) | 7.42±0.03 (7.42, 7.39–7.45) | 7.42±0.06 (7.42, 7.39–7.45) | 0.92 |
| pCO2, mm Hg | 42.35±6.54 (42.00, 38.20–47.00) | 41.33±4.44 (41.50, 38.65–44.17) | 42.44±6.72 (42.00, 38.20–48.00) | 0.74 |
| HCO3, mmol/L | 27.22±3.74 (26.00, 24.80–28.50) | 28.32±1.88 (28.35, 27.73–28.95) | 27.12±3.86 (25.70, 24.80–28.50) | 0.53 |
| BE, mmol/L | 3.51±4.12 (2.70, 0.50–5.65) | 4.1±2.18 (4.45, 2.70–5.85) | 3.46±4.26 (2.65, 0.48–5.53) | 0.76 |
| Lactate, mmol/L | 2.00±1.04 (1.80, 1.00–2.70) | 1.38±0.81 (1.30, 0.75–1.93) | 2.05±1.04 (2.10, 1.30–2.70) | 0.22 |
| Glucose, mg/dL | 96.64±34.20 (87.50, 78.75–97.50) | 90.33±2.31 (89.00, 89.00–91.00) | 97.10±35.41 (86.00, 78.00–99.00) | 0.74 |
| Hemoglobin, g/L | 129.8±32.2 (131.0, 108.0–151.0) | 133.5±52.8 (130.5, 100.0–164.0) | 129.5±30.5 (131.0, 109.0–148.0) | 0.8 |
| Postoperative | ||||
| pH | 7.40±0.05 (7.40, 7.38–7.43) | 7.37±0.04 (7.38, 7.36–7.40) | 7.41±0.05 (7.40, 7.38–7.43) | 0.09 |
| pCO2, mm Hg | 43.00±7.35 (42.40, 38.00–47.50) | 40.64±6.13 (39.35, 35.75–44.17) | 48.09±7.75 (46.80, 43.00–52.00) | 0.06 |
| HCO3, mmol/L | 26.31±3.66 (25.85, 23.87–27.92) | 27.59±4.36 (26.50, 25.00–28.65) | 26.16±3.59 (25.80, 23.80–27.30) | 0.33 |
| BE, mmol/L | 2.45±3.98 (2.20, −0.15 to 3.80) | 3.46±3.33 (2.30, 1.45–3.50) | 2.33±4.06 (2.10, −0.05 to 4.05) | 0.47 |
| Lactate, mmol/L | 1.60±0.99 (1.40, 0.90–2.00) | 1.29±1.08 (1.00, 0.75–1.10) | 1.63±0.98 (1.50, 0.90–2.00) | 0.37 |
| Glucose, mg/dL | 103.29±26.02 (97.00, 83.00–118.00) | 106.00±16.49 (107.50, 97.50–117.50) | 103.02±26.89 (95.00, 83.00–119.00) | 0.78 |
| Hemoglobin, g/L | 116.9±28.9 (112.0, 93.0–135.0) | 92.3±16.6 (90.0, 84.5–96.0) | 119.8±28.8 (117.0, 96.7–140.0) | 0.03* |
Data are presented as mean±SD (median, IQR).
P values apply to the apnea vs no apnea comparison (likelihood ratio test).
*statistically significant
BE, base excess; Cl, serum chloride; Hb, blood hemoglobin; HCO3, serum bicarbonate; IQR, interquartile range; K, serum potassium; Na, serum sodium; pCO2, partial pressure of carbon dioxide in blood; SD, standard deviation.