Shibahashi et al reported a nomogram to screen for blunt trauma to the thoracic aorta. The authors are from Tokyo Metropolitan Bokutoh Hospital in Japan.
Patient selection: blunt trauma
Parameters:
(1) age in years
(2) sex
(3) high-energy impact
(4) hypotension
(5) Glasgow coma scale (GCS)
(6) injury to the diaphragm
(7) hepatic injury
(8) pulmonary injury
(9) cardiac injury
(10) renal injury
(11) sternal fracture
(12) multiple rib fractures
(13) pelvic fracture
Parameter
Finding
Points
age in years
< 55 years
0
>= 55 years
22.8
sex
female
0
male
29.7
high-energy impact
no
0
yes
100
hypotension
no
0
yes
89
Glasgow coma scale
9 to 15
0
3 to 8
54.1
injury to diaphragm
no
0
yes
48
hepatic injury
no
0
yes
24.7
pulmonary injury
no
0
yes
24
cardiac injury
no
0
yes
49.3
renal injury
no
0
yes
33.2
sternal fracture
no
0
yes
24
multiple rib fractures
no
0
yes
40.5
pelvic fracture
no
0
yes
31.8
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 571.3
value of X =
= (0.01391 * (score)) - 7.126
probability of blunt thoracic aortic trauma =
= 1 / ( 1 + EXP((-1) * X))
Performance:
• The area under the ROC curve is 0.87.
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