Lappas et al developed a model for predicting blood
transfusion requirements during cardiac bypass surgery. This can help determine
the number of units that should be crossmatched prior to the surgery. The
authors are from Duke University in Durham, North Carolina.
|
Parameters
|
Findings
|
Points
|
|
age
|
> 75 years
|
1.5
|
|
|
65.1 - 75 years
|
1.0
|
|
|
<= 65 years
|
0
|
|
body weight
|
< 121 pounds
|
1.5
|
|
|
121 - 186.9
|
0.5
|
|
|
>= 187 pounds
|
0
|
|
serum creatinine
|
> 1.4 mg/dL
|
1.5
|
|
|
1.21 - 1.4 mg/dL
|
0.5
|
|
|
<= 1.2
|
0
|
|
gender
|
female
|
1.0
|
|
|
male
|
0
|
|
hematocrit
|
>= 36 percent
|
0
|
|
|
< 36 percent
|
1.0
|
|
cardiac function
|
moderate to marked impairment
|
0.5
|
|
|
mild to no impairment
|
0
|