Tobiasen et al developed the Burn Severity Risk Index to predict the chances of survival in a patient with a severe thermal injury. The authors are from the University of Virginia at Charlottesville.
Parameters:
(1) gender
(2) age
(3) percentage of second-degree burn
(4) percentage of third-degree burn
(5) percentage of total body surface area involved by burn
(6) inhalation injury
(7) cranium involved
(8) abdomen involved
(9) back involved
(10) arm involved
(11) foot involved
|
Parameter |
Finding |
Points |
|---|---|---|
|
gender |
male |
-8.214 |
|
|
female |
-7.269 |
|
age in years |
|
closest year |
|
percent second degree burn |
0% |
0 |
|
|
1-10% |
1 |
|
|
11-20% |
2 |
|
|
21-30% |
3 |
|
|
31-40% |
4 |
|
|
41-50% |
5 |
|
|
51-60% |
6 |
|
|
61-70% |
7 |
|
|
71-80% |
8 |
|
|
81-90% |
9 |
|
|
91-100% |
10 |
|
percent third degree burn |
0% |
0 |
|
|
1-10% |
1 |
|
|
11-20% |
2 |
|
|
21-30% |
3 |
|
|
31-40% |
4 |
|
|
41-50% |
5 |
|
|
51-60% |
6 |
|
|
61-70% |
7 |
|
|
71-80% |
8 |
|
|
81-90% |
9 |
|
|
91-100% |
10 |
|
total percent BSA burn |
0% |
0 |
|
|
1-10% |
10 |
|
|
11-20% |
20 |
|
|
21-30% |
30 |
|
|
31-40% |
40 |
|
|
41-50% |
50 |
|
|
51-60% |
60 |
|
|
61-70% |
70 |
|
|
71-80% |
80 |
|
|
81-90% |
90 |
|
|
91-100% |
100 |
|
inhalation injury |
no |
0 |
|
|
yes |
1.18 |
|
cranium involved |
no |
0 |
|
|
yes |
1.079 |
|
abdomen involved |
no |
0 |
|
|
yes |
1.079 |
|
back involved |
no |
0 |
|
|
yes |
1.079 |
|
arm involved |
no |
0 |
|
|
yes |
1.079 |
|
foot involved |
no |
0 |
|
|
yes |
1.079 |
where:
• The total body surface area burned may have 2 interpretations: (a) total body surface area involved (first, second and third degree), (b) just second and third degree burn areas.
• The neck, hands and legs are not listed.
total score =
= (points for gender) + (0.055 * (points for age)) – (0.77 * (points for second degree burn)) + (0.31 * (points for third degree burn)) + (0.068 * (points for total body surface area burned)) + (points for inhalation injury) + (points for cranium) + (points for abdomen) + (points for back) + (points for arm) + (points for foot)
burn severity index =
= (2 * (total score)) + 17
|
Burn Severity Index |
Probability of Survival |
|---|---|
|
0 – 11.2 |
0.99 |
|
11.3 – 13.7 |
0.90 |
|
13.8 – 14.7 |
0.80 |
|
14.8 – 15.7 |
0.70 |
|
15.8 – 16.5 |
0.60 |
|
16.6 – 17.4 |
0.50 |
|
17.5 – 18.2 |
0.40 |
|
18.3 – 19.0 |
0.30 |
|
19.1 – 20.4 |
0.20 |
|
20.5 – 23.1 |
0.10 |
|
>= 23.2 |
< 0.10 |
Limitations:
• The score was derived in 1980 and the prognosis may not reflect current management practices.
Specialty: Toxicology, Emergency Medicine, Critical Care
