| | | | | | The Medical Algorithms Project |
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| Chapter : | ch5. Transfusion Medicine | Section : | Estimation of Blood Loss and Prediction of Blood Transfusion Needs | | Score of Larocque et al for Predicting Blood Transfusion in Knee or Hip Joint Arthroplasty | | Copyright (c) 2006-2007, Institute for Algorithmic Medicine, Houston, TX, USA. All rights reserved. |
|
Overview :
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 =
= SUM(points for 4 predictors)
Interpretation:
• minimum score: 0
• maximum score: 13
• usual observed range: 0 to 10
|
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% |
| | References: | |
Larocque
BJ, Gilbert K, Brien WF. A point score system for predicting the likelihood of
blood transfusion after hip or knee arthroplasty. Transfusion. 1997; 37:
463-467.
Lacocque
BJ, Gilbert K, Brien WF. Prospective validation of a point score system for
predicting blood transfusion following hip or knee replacement. Transfusion.
1998; 38: 932-937.
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