Park et al identified risk factors for massive transfusion in adolescents undergoing surgical correction of idiopathic scoliosis. The authors are from the University of Ulsan in Seoul.
Patient selection: adolescent with idiopathic scoliosis
Procedure: corrective surgery by the posterior approach
Outcome: massive transfusion (transfusion of > 100% total blood volume within 24 hours)
About 10% of patients received a massive transfusion.
Risk factors associated with massive transfusion in multivariate analysis:
(1) higher number of fused vertebrae
(2) lower body mass index
where:
• The body mass index had a mean of 19.6 kg per sq m +/- 3.0, with minimum 16. A BMI < 18.1 will be used in the implementation to indicate increased risk.
• The number of fused vertebrae had a mean of 11.15 +/- 1.49, with maximum 12.6. A number >= 12 fused vertebrae will be used in the implementation.
Additional factors associated with massive transfusion
(3) Lenke curve type 4
(4) greater Cobb angle when standing
where:
• The Cobb angles had a mean of 56.8 degrees +/- 10.35. maximum 77.2. An angle > 60 will be used in the implementation.
