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Table 3 Laboratory parameters in patients undergoing OPCAB

From: Epidural anesthesia and postoperative analgesia with ropivacaine and fentanyl in off-pump coronary artery bypass grafting: a randomized, controlled study

Characteristic

Group

Period

  

After induction of anesthesia

End of

Operation

2 hours

6 hours

12 hours

18 hours

24 hours

 

Control

7.39 ± 0.04

7.34 ± 0.05+

7.30 ± 0.04+

7.33 ± 0.03+

7.36 ± 0.03+

7.39 ± 0.03

7.40 ± 0.06

pH

EI

7.37 ± 0.03

7.34 ± 0.04+

7.30 ± 0.06+

7.34 ± 0.04+

7.38 ± 0.03+

7.39 ± 0.03+

7.41 ± 0.03+

 

PCEA

7.38 ± 0.03

7.34 ± 0.05+

7.30 ± 0.04+

7.35 ± 0.04+

7.37 ± 0.04

7.40 ± 0.03

7.40 ± 0.03+

 

Control

38.2 ± 3.49

39.0 ± 5.56

41.1 ± 5.05

39.0 ± 4.21

38.0 ± 5.10

36.8 ± 4.14

33.7 ± 4.13+

PaCO2, mm Hg

EI

40.1 ± 4.41

39.4 ± 5.16

42.1 ± 6.90

38.5 ± 4.93

35.7 ± 4.82+

36.1 ± 3.61+

34.2 ± 2.86+

 

PCEA

39.2 ± 3.77

39.2 ± 5.36

42.1 ± 4.34

37.8 ± 3.29

36.7 ± 3.97

34.5 ± 3.73+

33.9 ± 4.38+

 

Control

287 ± 100

243 ± 108

275 ± 73

282 ± 80

273 ± 76

272 ± 139

302 ± 98

PaO2/FiO2, mm Hg

EI

323 ± 110

272 ± 93

292 ± 97

296 ± 71

290 ± 87

281 ± 89

282 ± 110

 

PCEA

336 ± 104

257 ± 83

300 ± 71

303 ± 103

298 ± 91

340 ± 129*

347 ± 124

 

Control

1.00 ± 0.28

1.28 ± 0.63

1.50 ± 0.74+

1.75 ± 0.76+

1.74 ± 0.87+

1.80 ± 0.58+

1.50 ± 0.40+

Lactate, mmol/l

EI

1.07 ± 0.78

1.16 ± 0.36

1.38 ± 0.62

1.50 ± 0.74+

1.46 ± 0.81

1.44 ± 0.44

1.20 ± 0.37

 

PCEA

1.06 ± 0.36

1.09 ± 0.42

1.40 ± 0.80+

1.81 ± 0.86+

1.70 ± 0.77+

1.35 ± 0.44+*

1.48 ± 0.71+

 

Control

5.71 ± 1.51

6.77 ± 2.00+

8.01 ± 2.67+

8.42 ± 3.15+

7.22 ± 2.56+

6.17 ± 1.47

6.33 ± 1.36

Glucose, mmol/l

EI

5.16 ± 1.40

5.97 ± 1.44

7.28 ± 2.24+

6.90 ± 1.84+

6.25 ± 1.96+

5.64 ± 1.32

6.81 ± 2.34+

 

PCEA

5.60 ± 1.48

6.41 ± 2.18+

7.68 ± 2.79+

7.84 ± 2.64+

7.12 ± 1.92+

6.13 ± 1.68+

6.59 ± 1.52

 

Control

219 ± 80

-

-

984 ± 334+

-

714 ± 297+

-

Cortisol, nmol/l

EI

296 ± 111

-

-

861 ± 366+

-

618 ± 322+

-

 

PCEA

303 ± 108

-

-

832 ± 371+

-

591 ± 223+

-

 

Control

0.01 ± 0.00

-

-

0.32 ± 0.30+

-

0.25 ± 0.35

-

Troponin T, ng/ml

EI

0.01 ± 0.00

-

-

0.20 ± 0.11+

-

0.10 ± 0.08

-

 

PCEA

0.01 ± 0.00

-

-

0.26 ± 0.20+

-

0.33 ± 0.52

-

  1. Data are presented as mean ± SD.
  2. *P < 0.05 compared with the control group;
  3. + P < 0.05 compared with baseline (after induction of anesthesia).
  4. Control, control group; EI, epidural infusion group; PCEA, patient controlled epidural analgesia group.