Wymer et al reported a score for predicting urinary tract infection (UTI) in a patient with obstructive urolithiasis with upper urinary tract decompression. The authors are from the Mayo Clinic and Indiana University.
Patient selection: obstructive urolithiasis, undergoing decompression
Parameters:
(1) urinary Gram stain
(2) perinephric fat stranding on CT scan
(3) serum CRP in mg/L
(4) serum procalcitonin in ng/mL
Parameter
Finding
Points
urinary Gram stain
negative
0
positive
1
perinephric fat stranding
absent
serum CRP
<= 21.97
> 21.97
serum procalcitonin
< = 0.36
> 0.36
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 4
Score
Percent with Confirmed UTI
8%
11%
2
68%
3
100%
4
Performance:
• The area under the ROC curve is 0.91.
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Specialty: Infectious Diseases
