Table 1.
Patient demography, Comorbidities, and Operative Data
| Parameters | Group CINB (n = 130) | Group SI (n = 86) | P |
|---|---|---|---|
| Age, years | 62.0 ± 9.5 | 62.6 ± 10.6 | 0.665 |
| Weight, kg | 69.2 ± 11.6 | 69.6 ± 10.0 | 0.809 |
| Male, % | 98(75%) | 59(69%) | 0.280 |
| BMI, kg.m−2 | 25.0 ± 3.3 | 25.0 ± 2.9 | 0.995 |
| Hypertension | 89 (68%) | 54 (63%) | 0.388 |
| Diabetes | 41 (32%) | 26 (30%) | 0.839 |
| NYHA | 0.814 | ||
| I/asymptomatic | 42(32%) | 30(35%) | |
| II | 65(50%) | 45(52%) | |
| III | 21(16%) | 10(12%) | |
| IV | 2(2%) | 1(1%) | |
| Pulmonary function a | |||
| FVC actual, L | 3.31 ± 0.82 | 3.12 ± 0.86 | 0.130 |
| FVC% predicted | 89 ± 14 | 85 ± 15 | 0.114 |
| FEV1 actual, L | 2.49 ± 0.72 | 2.45 ± 0.68 | 0.767 |
| FEV1% predicted | 85 ± 18 | 86 ± 16 | 0.630 |
| Pre. PO2, mmHg# | 82 ± 18 | 81 ± 15 | 0.742 |
| Pre. PCO2, mmHg # | 39 ± 4 | 40 ± 4 | 0.647 |
| Pre. glucose, mmol/L | 7.8(5.9–9.6) | 7.0(5.8–9.2) | 0.164 |
| No. of grafts | < 0.0001 | ||
| 1 | 77(59%) | 79(92%) | |
| 2 | 45(35%) | 7(8%) | |
| 3 | 8(6%) | / | |
| Duration of surgery, h | 2.9(2.1–4.6) | 2.5(2.1–3.0) | 0.003 |
Values are mean ± SD, median (interquartile range), or number with percentage
Abbreviations: SI Single injection, CINB Continuous intercostal nerve block, NYHA New York Heart Association, FEV1 Forced expiratory volume in 1 s, FVC Functional vital capacity, BMI Body mass index, Pre Preoperative
aIndicates that only 77 patients in CINB group had preoperative pulmonary function data. # Indicates n = 82 in SI, and n = 123 in CINB