Table 2 Surgery and anesthesia characteristics
BF1 group (n = 74) | BF2 group (n = 74) | B group (n = 32) | P value | |
|---|---|---|---|---|
Type of surgery, n (%) | 0.316 | |||
Femoral head arthroplasty | 3 (4.1) | 5 (6.8) | 2 (6.3) | |
Hip joint arthroplasty | 10 (13.5) | 4 (5.4) | 0 (0.0) | |
Knee joint arthroplasty | 53 (71.6) | 57 (77.0) | 26 (81.3) | |
Open reduction of fracture or removal of internal fixation for fracture | 8 (10.8) | 8 (10.8) | 4 (13.5) | |
Surgery time, min, mean, (SD) | 87.7 (29.0) | 96.4 (38.7) | 101.6 (27.8) | 0.096 |
Volume expansion, mL, n (%) | 0.949 | |||
≤ 500 | 1 (1.4) | 0 (0.0) | 0 (0.0) | |
500–1000 | 14 (18.9) | 14 (18.9) | 7 (21.9) | |
> 1000 | 59 (79.7) | 60 (81.1) | 25 (78.1) | |
Time to complete injection, s, median (IQR) | 20(16–28) | 22.5 (16.8–30) | 21 (16.3–23.8) | 0.244 |