Research Article
Risk Factors of Total Blood Loss and Hidden Blood Loss in Patients with Adolescent Idiopathic Scoliosis: A Retrospective Study
Table 1
The clinical data of 114 patients who underwent posterior orthopedic surgery for AIS.
| | Parameters | Mean | SD |
| | Gender (male/female) | 38/76 | | Age (year) | 14.86 | 4.84 | | BMI (kg/m2) | 18.73 | 3.45 | | The number of surgical fixation segments | 9.62 | 2.56 | | The number of pedicle screws | 17.14 | 4.39 | | Operative time (min) | 311.23 | 117.63 | | PLTpre (109/L) | 235.06 | 55.28 | | PLTpost (109/L) | 190.59 | 73.92 | | TBV (mL) | 3429.19 | 720.19 | | Blood transfusion volume (mL) | 822.46 | 523.59 | | TBL (mL) | 1655.51 | 564.10 | | TBL (mL/level) | 173.51 | 40.13 | | HBL (mL) | 475.09 | 197.59 | | HBL (mL/level) | 48.64 | 13.10 | | HBL/TBL | 0.29 | 0.08 | | Hospital stay (day) | 12.26 | 1.95 | | Type of scoliosis (1/5/others) | 68/37/9 | | Risser sign | 3.46 | 1.06 | | Correction angle (°) | 29.39 | 12.84 |
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AIS: adolescent idiopathic scoliosis; BMI: body mass index; TBL: total blood loss; HBL: hidden blood loss; TBV: total blood volume; PLTpre: preoperative platelets; PLTpost: postoperative platelets.
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