Blood Loss and Other Parameters for Patients Who Underwent Total Knee Arthroplasty With (33 Patients) and Without (30 Patients) the Use of a Pneumatic Tourniquet
| Parameter | Tourniquet | Nontourniquet | p value |
|---|---|---|---|
| Blood loss | |||
| Intraoperative blood loss, mL | 148 (81) | 295 (193) | < 0.0001 |
| Hemovac drainage blood loss, mL | 507 (317) | 449 (226) | > 0.4 |
| Total measured blood loss, mL | 654 (324) | 742 (287) | > 0.25 |
| Calculated blood loss, mL | 1792 (572) | 1499 (373) | = 0.02 |
| Preoperative hemoglobin level, g/L | 134 (16) | 133 (16) | > 0.8 |
| “Low” postoperative hemoglobin level, g/L | 93 (15) | 95 (15) | > 0.6 |
| Change in hemoglobin level, g/L | 41 (12) | 38 (10) | > 0.2 |
| No. of patients receiving transfusions | 10 | 6 | > 0.1* |
| Other | |||
| Operative time, min | 83 (13) | 81 (13) | > 0.5 |
| No. of complications | 11 | 5 | = 0.06* |
| Hospital stay, d | 8.5 (4.3) | 6.9 (2.2) | = 0.075 |
Values are means (and standard deviations).
↵* χ2 analysis