The Penn Arthroplasty Risk Score (PARS) can help to identify a patient undergoing total joint arthroplasty (knee, hip, other) who may need intensive care following surgery. The authors are from the University of Pennsylvania.
Patient selection: total joint arthroplasty (TJA)
Parameters:
(1) chronic obstructive pulmonary disease (COPD)
(2) congestive heart failure (CHF)
(3) coronary artery disease (CAD)
(4) estimated blood loss (EBL) in mL
(5) need for intraoperative vasopressors
Parameter
Finding
Points
COPD
no
0
yes
1
CHF
no
0
yes
1
coronary artery disease
no
0
yes
1
estimated blood loss
<= 1,000 mL
0
> 1,000 mL
2
intraoperative vasopressors
no
0
yes
2
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 7
Total Score
Percent ICU Care
0
7%
1
13%
2
24%
3
38%
4
55%
5
71%
6
83%
7
91%
Performance:
• The area under the ROC curve is 0.82.
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