The probability for needing a blood transfusion following
total joint arthroplasty for the knee or hip can be estimated from certain
clinical parameters. This can help especially in minimizing wastage of
autologous units.
|
Predictor
|
Value
|
Points
|
|
hemoglobin in g/L
|
> 130
|
0
|
|
|
111 - 130
|
2
|
|
|
<= 110
|
3
|
|
weight in kilograms
|
> 100
|
0
|
|
|
81 - 100
|
1
|
|
|
<= 80
|
2
|
|
arthroplasty type
|
knee
|
0
|
|
|
hip
|
2
|
|
|
bilateral knee
|
3
|
|
|
bilateral hip
|
6
|
|
primary or revision surgery
|
primary
|
0
|
|
|
revision
|
2
|
|
Predictive Score
|
Group
|
Frequency of Blood Transfusion
|
|
<= 2
|
1
|
1.7%
|
|
3 or 4
|
2
|
11%
|
|
5, 6, 7
|
3
|
40%
|
|
>= 8
|
4
|
78.3%
|