Table 1. Individual Patients Demographics

Duration

Duration of

Duration of

Mean Arterial

Compound A

Compound A

Group

of

Mean

Surgical

Surgical

Surgical

Tourniquet

Blood

Blood Pressure

Concentration

Inspired

Patient

Age

Height

Weight

Anesthesia

MAC H

MAC

Procedure

Site

Procedure

Inflation

Loss

(mmHg)

(ppm)

AUC

No.

(yr)

(cm)

(kg)

(min)

(min)

(min)

(ml)

Pre

Lowest

Ave

Peak

Mean

(ppm-h)

Low-flow

101

22

163

75

585

21.3

2.2

550

Knee

Ligament reconstruction

155

130

78

63

81

57.2

35.1

342.2

Sevoflurane

104

27

165

61

425

9.3

1.3

295

Knee

Ligament reconstruction

115

8

98

81

91

39.4

25.5

180.5

plus

202

20

176

72

425

13.4

1.9

311

Shoulder

Arthroplasty

141

75

61

78

54.2

25.2

178.4

Probenecid

105

25

173

68

370

8.0

1.3

229

Knee

Ligament reconstruction

135

4

67

63

72

48.0

26.7

164.4

(LSP)

204

21

171

70

320

7.1

1.3

235

Shoulder

Arthroplasty

111

65

68

77

31.6

25.6

136.6

107

23

176

68

485

11.4

1.4

352

Knee

Ligament reconstruction

172

44

73

62

70

46.7

30.2

244.0

205

23

176

73

460

9.2

1.2

346

Shoulder

Arthroplasty

47

75

61

81

41.3

21.8

167.5

207

23

170

58

485

8.7

1.1

387

Shoulder

Arthroplasty

108

83

67

79

36.5

18.7

151.1

111

24

164

80

480

9.8

1.2

350

Knee

Ligament reconstruction

185

33

80

65

75

57.1

33.8

270.3

210

23

180

77

475

14.1

1.8

362

Shoulder

Arthroplasty

187

89

73

83

54.9

43.1

341.5

112

22

170

65

485

17.5

2.2

358

Knee

Ligament reconstruction

121

24

87

73

83

62.7

41.5

335.1

114

19

175

68

435

8.5

1.2

289

Knee

Ligament reconstruction

151

16

72

66

75

33.5

25.6

185.6

211

36

183

74

365

8.4

1.4

259

Shoulder

Arthroplasty

98

83

68

73

33.8

26.1

158.5

120

27

177

74

375

13.9

2.2

268

Knee

Ligament reconstruction

115

30

71

61

69

44.3

34.4

214.8

129

24

175

75

375

8.8

1.4

275

Knee

Ligament reconstruction

134

82

79

64

76

52.0

34.4

212.3

223

33

168

60

245

8.3

2.0

121

Shoulder

Arthroplasty

95

82

67

74

39.2

24.9

101.8

mean±SD

25±5

173±6

70±6

424±82

11.1±4.0

1.6±0.4

312±92

143±25

72±54

79±9

66±5

77±6

45.8±9.8

29.5±6.9

211.5±75.2

Low-flow

102

28

177

75

430

11.7

1.6

301

Knee

Ligament reconstruction

175

4

81

70

76

48.9

38.5

276.0

Sevoflurane

103

21

162

65

430

7.9

1.1

298

Knee

Ligament reconstruction

192

9

71

67

77

39.3

31.5

225.9

(LS)

201

24

174

70

335

9.6

1.7

210

Shoulder

Arthroplasty

55

73

59

65

45.1

26.7

148.8

203

26

174

63

430

115.0

1.6

313

Shoulder

Arthroplasty

145

74

68

76

55.3

33.9

242.7

106

19

180

70

430

16.8

2.3

303

Knee

Ligament reconstruction

177

20

82

67

75

74.0

37.3

267.1

206

21

170

63

445

13.0

1.6

332

Shoulder

Arthroplasty

159

70

57

66

32.9

24.7

182.9

208

18

176

86

315

11.2

1.4

197

Shoulder

Arthroplasty

157

67

58

70

44.4

33.1

173.6

108

22

175

75

485

9.0

1.2

349

Knee

Ligament reconstruction

133

55

77

63

70

50.4

31.9

257.7

209

24

171

73

470

9.2

1.8

351

Shoulder

Arthroplasty

182

78

63

83

73.5

43.0

336.6

109

34

172

66

485

14.0

1.7

359

Knee

Ligament reconstruction

125

40

88

71

79

49.9

33.0

267.1

110

24

171

65

490

16.6

2.1

360

Knee

Ligament reconstruction

129

45

76

69

77

36.3

27.2

222.0

212

24

165

55

335

5.8

1.0

223

Shoulder

Arthroplasty

246

74

75

83

28.3

19.9

111.0

113

21

173

70

415

13.8

2.0

295

Knee

Ligament reconstruction

210

50

73

71

82

76.6

35.4

244.6

122

18

175

62

485

8.9

1.4

395

Knee

Ligament reconstruction

109

21

87

76

88

32.1

16.3

131.7

218

26

170

65

335

11.6

2.1

210

Shoulder

Arthroplasty

71

99

79

88

25.7

19.9

111.3

125

36

180

78

555

14.9

1.9

468

Knee

Ligament reconstruction

94

23

78

79

88

33.3

26.7

247.0

mean±SD

24±5

173±5

69±8

429±69

11.6±3.1

1.7±0.4

310±74

160±37

80±73

78±8

68±7

78±8

46.6±16.3

29.9±7.4

215.4±65.4

High-flow

213

22

173

90

495

16.6

1.9

398

Shoulder

Arthroplasty

325

85

70

81

11.8

6.6

54.3

Sevoflurane

118

29

160

51

455

10.1

1.8

313

Knee

Ligament reconstruction

241

4

74

65

81

5.8

3.0

22.6

plus

119

21

180

75

500

12.3

1.4

403

Knee

Ligament reconstruction

178

6

84

73

80

4.5

1.8

14.8

Probenecid

121

22

162

52

450

11.4

1.5

340

Knee

Ligament reconstruction

123

8

78

67

82

8.2

3.2

24.4

(HSP)

216

22

164

54

350

10.4

1.5

247

Shoulder

Arthroplasty

46

74

65

69

2.9

1.7

10.2

126

23

170

62

435

15.4

1.7

313

Knee

Ligament reconstruction

153

12

69

56

68

3.5

2.1

15.0

127

24

168

70

470

14.2

2.0

320

Knee

Ligament reconstruction

234

11

77

65

82

5.9

2.7

21.3

217

22

178

85

355

10.8

1.9

234

Shoulder

Arthroplasty

27

90

78

95

11.0

7.8

45.9

222

34

173

90

410

9.3

1.3

308

Shoulder

Arthroplasty

186

86

71

82

6.5

5.0

33.9

128

35

173

61

410

7.6

1.3

265

Knee

Ligament reconstruction

102

9

83

68

80

2.8

1.2

8.4

224

20

168

82

380

8.4

1.8

288

Shoulder

Arthroplasty

77

69

59

69

7.7

4.8

30.5

132

32

170

66

480

9.8

1.4

358

Knee

Ligament reconstruction

133

102

75

61

81

6.5

3.4

27.6

133

22

166

62

475

11.0

1.6

340

Knee

Ligament reconstruction

125

27

89

77

89

15.3

6.5

51.4

225

23

173

75

425

13.4

1.6

338

Shoulder

Arthroplasty

60

83

72

90

8.7

5.0

35.2

136

20

165

58

390

10.1

1.5

267

Knee

Ligament reconstruction

113

85

83

68

79

8.6

3.5

22.8

228

31

160

64

335

13.8

1.8

265

Shoulder

Arthroplasty

79

70

57

66

5.1

3.3

18.7

mean±SD

25±5

169±6

69±13

426±53

11.5±2.5

1.6±0.2

312±50

156±51

67±84

79±7

67±7

80±8

7.2±3.4  ,##

3.9±1.9  ,##

27.3±13.9  ,##

High-flow

115

37

165

75

520

14.4

1.7

400

Knee

Ligament reconstruction

120

192

65

53

65

7.7

5.3

45.3

Sevoflurane

214

30

168

65

340

12.7

1.7

230

Shoulder

Arthroplasty

45

81

67

65

5.2

2.9

16.2

(HS)

116

23

177

84

515

11.3

1.4

435

Knee

Ligament reconstruction

314

7

90

73

82

8.9

3.7

31.7

117

22

174

72

465

10.1

1.3

365

Knee

Ligament reconstruction

139

102

76

68

83

8.9

4.3

33.6

215

32

170

70

410

8.5

1.5

307

Shoulder

Arthroplasty

108

87

76

92

6.9

3.2

21.7

123

21

162

54

545

7.9

1.1

445

Knee

Ligament reconstruction

142

7

84

75

90

6.6

2.9

26.2

219

28

162

62

420

14.3

1.8

325

Shoulder

Arthroplasty

237

84

75

84

6.8

4.7

32.6

220

23

165

59

340

9.0

1.5

221

Shoulder

Arthroplasty

110

73

65

76

12.1

9.5

53.9

124

23

172

72

445

11.7

1.7

348

Knee

Ligament reconstruction

83

24

89

77

83

4.8

2.4

17.6

221

23

167

68

340

11.3

1.6

245

Shoulder

Arthroplasty

136

73

67

75

7.2

3.4

19.3

226

22

165

70

285

11.5

1.8

210

Shoulder

Arthroplasty

145

69

66

77

8.1

4.2

19.9

130

20

164

61

430

11.6

1.4

331

Knee

Ligament reconstruction

121

7

77

70

81

5.8

3.3

23.9

131

19

180

70

425

12.4

1.6

320

Knee

Ligament reconstruction

135

11

64

52

67

5.3

2.5

17.5

227

31

185

76

505

12.8

1.8

423

Shoulder

Arthroplasty

540

84

75

90

8.6

5.4

45.5

134

27

166

71

405

13.1

2.0

277

Knee

Ligament reconstruction

178

9

78

64

78

5.4

1.9

12.8

135

21

165

70

460

8.8

1.6

350

Knee

Ligament reconstruction

156

8

92

74

89

6.1

3.8

29.3

mean±SD

25±5

169±7

69±7

428±74

11.3±2.0

1.6±0.2

327±76

154±65

106±137

78±9

68±7

79±8

7.2±1.9  ,##

4.0±1.8  ,##

27.9±11.9  ,##

Pre = preanesthesia; Lowest = the lowest mean arterial blood pressure during anesthesia; Ave = average mean arterial blood pressure during anesthesia

AUC= area under the curve

  P<0.01 compared with the low-flow sevoflurane group. __P<0.01 compared with the low-flow plus probenecid sevoflurane group.

Table 2. Preoperative and Postoperative Serum BUN, Creatinine Concentrations, and Creatinine Clearance

Group

Preanesthesia

Day 1

Day 3

Day 5

Day 7

Serum BUN (mg/dL)

Low-flow Sevoflurane plus Probenecid (LSP)

13±3

11±3**

11±2**

13±3

14±4

Low-flow Sevoflurane (LS)

14±3

10±3**

10±3**

14±4

15±4

High-flow Sevoflurane plus Probenecid (HSP)

14±3

10±4**

11±3**

15±4*

16±4*

High-flow Sevoflurane (HS)

13±4

10±4**

10±2**

13±3

14±3

Serum Creatinine (mg/dL)

Low-flow Sevoflurane plus Probenecid (LSP)

0.9±0.2

0.9±0.1

0.8±0.1**

0.9±0.1*

0.9±0.1

Low-flow Sevoflurane (LS)

0.9±0.1

0.9±0.1

0.9±0.2*

0.9±0.2

0.9±0.1

High-flow Sevoflurane plus Probenecid (HSP)

0.9±0.1

0.9±0.1

0.8±0.1**

0.8±0.1*

0.8±0.1

High-flow Sevoflurane (HS)

0.9±0.1

0.8±0.1

0.8±0.1*

0.8±0.1

0.9±0.1

Creatinine Clearance (ml/min)

Low-flow Sevoflurane plus Probenecid (LSP)

110±24

127±32*

113±24

104±18

104±23

Low-flow Sevoflurane (LS)

106±18

127±27*

98±19

104±24

110±30

High-flow Sevoflurane plus Probenecid (HSP)

109±35

129±49

127±47

112±49

106±37

High-flow Sevoflurane (HS)

113±28

144±26*

128±41

113±30

104±19

BUN=Blood Urea Nitrogen

*P<0.05 compared with preanesthesia value.**P<0.01 compared with preanesthesia value.

Table 3. Time Course of Urinary Excretion of Protein, Albumin, _2-microglobilin, Glucose, and NAG

Group

Days after anesthesia

Pre

1

2

3

4

5

6

7

Max

Ave

24 h Urinary Protein Excretion (mg)

Low-flow Sevoflurane plus Probenecid (LSP)

60±33

94±32 

106±44** 

106±50

89±52

64±39

60±37

65±35

129±55 

83±30  

Low-flow Sevoflurane (LS)

54±18

279±508**

293±296**

339±403**

240±267*

140±117

97±63

88±44

466±562

211±214

High-flow Sevoflurane plus Probenecid (HSP)

65±16

73±31**  

62±32  

65±24*  

53±36  

42±24  

56±57  

49±37  

100±51  

57±22  

High-flow Sevoflurane (HS)

47±17

144±222** 

84±47  

77±39  

48±31  

50±28  

44±27  

48±31  

150±219  

70±47  

24 h Urinary Albumin Excretion (mg)

Low-flow Sevoflurane plus Probenecid (LSP)

8±4

12±7 

14±7**

12±8

12±6

9±6

9±4

8±3

17±7 

11±5

Low-flow Sevoflurane (LS)

7±5

55±87**

67±84**

115±165**

129±186**

48±75

21±29

9±6

145±191

63±86

High-flow Sevoflurane plus Probenecid (HSP)

8±7

15±12* 

9±6  

12±7

11±10  

8±5

8±4

7±4

20±14 

10±5 

High-flow Sevoflurane (HS)

8±5

20±24*

10±6  

9±5 

9±7  

7±3 

8±4

7±4

21±24 

10±5 

24 h Urinary _2-microglobulin Excretion

Low-flow Sevoflurane plus Probenecid (LSP)

45±14

146±234** 

218±299**

172±247**

67±39

54±26 

52±23

41±20

285±370

107±99 

(_g/g_creatinine)

Low-flow Sevoflurane (LS)

44±18

3073±10294**

2691±8743**

1111±2514**

339±942

189±364

97±115

61±37

3411±10863

1075±3346

High-flow Sevoflurane plus Probenecid (HSP)

54±36

118±115*

156±128

248±341

115±184

138±236

100±135

116±200

341±374

141±139

High-flow Sevoflurane (HS)

46±23

443±1317**

285±408**

159±151**

88±103

55±48  

79±102

53±36

609±1324

166±244

24 h Urinary Glucose Excretion (mg)

Low-flow Sevoflurane plus Probenecid (LSP)

55±42

225±270**

446±931**

144±108**

102±59

145±305

58±30 

58±24

555±934

168±194

Low-flow Sevoflurane (LS)

65±19

535±1000**

750±1471**

732±1395**

588±1067**

196±282

117±83

94±94

833±1498

430±749

High-flow Sevoflurane plus Probenecid (HSP)

66±77

145±110*

117±96 

190±231

85±94  

46±30  

67±60 

52±21

241±216

100±66 

High-flow Sevoflurane (HS)

62±30

205±194**

111±51 

101±74

62±27  

79±82

64±43 

58±22

239±194

97±40 

24 h Urinary NAG Excretion

Low-flow Sevoflurane plus Probenecid (LSP)

1.6±0.7

1.6±1.1@

1.9±1.2  

2.7±1.1

3.0±1.8*

2.5±1.4

2.6±1.4

2.3±1.6

3.8±1.5

2.4±1.1 

(U/g_creatinine)

Low-flow Sevoflurane (LS)

1.5±0.8

2.9±4.9

4.6±4.1**

6.1±5.2**

4.2±2.8**

4.2±3.0**

3.1±1.5

3.1±1.8

7.5±5.2

4.0±2.4

High-flow Sevoflurane plus Probenecid (HSP)

1.9±0.8

2.2±0.9

2.1±1.3 

2.5±1.5 

2.8±1.0**

3.0±1.7*

3.2±2.4**

3.0±2.4

3.8±2.3 

2.7±1.3

High-flow Sevoflurane (HS)

2.0±0.6

2.6±1.3

3.8±5.0

4.0±4.0

3.8±2.4**

3.8±1.9

3.3±2.1

2.8±1.0

5.7±5.1

3.4±2.1

NAG=N-acetyl-_-glucosaminidase

Pre = preanesthesia; Max = maximum value after anesthesia; Ave = average value after anesthesia

*P<0.05 compared with preanesthesia value.**P<0.01 compared with preanesthesia value.

  P<0.05 compared with the Low-flow sevoflurane (LS) group.  P<0.01 compared with the Low-flow sevoflurane (LS) group.

@P<0.05 compared with the High-flow sevoflurane (HS) group.