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Nomogram of Shoobridge et al for Predicting Nephrectomy After Renal Trauma

Description

Shoobridge et al reported a nomogram for predicting surgical exploration in a patient with renal trauma. This is a modification of the nomogram of Shariat et al. The authors are from Alfred Hospital, Royal Melbourne Hospital, University of Melbourne and Guy's and St Thomas' NHS Foundation Trust.


Patient selection: trauma

 

Parameters:

(1) renal injury grade

(2) number of units of platelet transfused in the first 24 hours

(3) serum BUN in mg/dL

(4) hemoglobin in g/L

 

Parameter

Finding

Points

renal injury

Grade 1

0

 

Grade 2

25

 

Grade 3

50

 

Grade 4

75

 

Grade 5

100

 

points for serum BUN =

= MIN(33.3,0.555*(serum BUN))

 

points for platelets =

= MIN(57.4,3.5875*(number of platelet products))

 

points for hemoglobin =

= MAX(0,0.064107 * (hemoglobin)-4.4946)

 

total score =

= SUM(points for all 4 parameters)

 

Interpretation:

• minimum score: 0

• maximum score: 198.4

• The higher the score the greater the risk of surgical exploration and Nephrectomy.

 

Score

Probability of Nephrectomy

< 80

< 1%

80 to 97.4

(0.51724 * (score)) - 40.3793

97.4 to 120

(0.054146 * ((score)^2)) - (9.1075 * (score)) + 383.11

120 to 136

(-0.052813 * ((score)^2)) + (15.2 * (score)) - 994.12

> 136

> 95%

 


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