Table 2 Hypotensive episodes, infused fluid volumes and circulatory parameters in the patients in the general anaesthesia group (GA) and the general anaesthesia with interscalene block group (GA-ISB)
GA | GA-ISB | p | |
|---|---|---|---|
(n = 42) | (n = 41) | ||
Hypotension requiring vasopressor treatment (n (%)) | 27 (64%) | 31 (76%) | 0.45 |
Bradycardia requiring atropine (n) | 8 | 5 | 0.30 |
Infused fluid volumes (ml) | 1488 ± 209 | 1536 ± 447 | 0.54 |
Systolic arterial blood pressure (mmHg) | |||
Supine before induction | 132 ± 5.6 | 138 ± 17 | 0.11 |
After positioning in beach-chair | |||
Average | 114 ± 7.3 | 116 ± 8.3 | 0.09 |
Maximum | 135 ± 15 | 146 ± 19 | < 0.005 |
Minimum | 96 ± 11 | 90 ± 14 | < 0.02 |
Maximum change from baseline (%) | −27% | −34% | < 0.002 |
Heart rate (beats per minute) | |||
Supine before induction | 77.6 ± 11.6 | 70.0 ± 12.8 | < 0.01 |
After positioning in beach-chair | |||
Average over anaesthesia time | 73.2 ± 8.3 | 67.4 ± 10.4 | < 0.01 |
Maximum | 83.9 ± 9.1 | 77.9 ± 12.7 | < 0.02 |
Minimum | 66.3 ± 9.1 | 60.4 ± 9.3 | < 0.02 |
Maximum change from baseline (%) | 9.1 ± 10.8 | 13.8 ± 23.0 | 0.24 |