Matthay et al evaluated patients receiving ultramassive blood transfusions and identified factors associated with outcomes. The authors created 2 classification and regression tree (CART) models, one composed of patients with the most complete data. The authors are from multiple institutions in the United States.
Ultramassive blood transfusion: > 20 units of RBCs in first 24 hours, complete or near complete data
Outcome: survival
Ultramassive blood transfusion: > 20 units of RBCs in first 24 hours
Parameters:
(1) resuscitative thoracotomy
(2) Glasgow Coma Score (GCS)
(3) hemoglobin in g/dL
(4) blunt mechanism
(5) age in years
Thoracotomy
GCS
Hgb
Blunt
Age
Survival
yes
NA
NA
NA
NA
15%
no
3
< 11 g/dL
NA
NA
11%
no
3
>= 11
yes
NA
21%
no
3
>= 11
no
NA
75%
no
>= 4
NA
NA
< 50
78%
no
>= 4
NA
NA
>= 50
32%
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