Wallgren et al reference the BAS 90-30-90 score to screen for sepsis. The authors are from the Karolinska Institutet in Sweden.
BAS is an acronym based on terms for vital signs in Swedish.
|
Abbreviation |
Swedish |
English |
|
B |
systoliskt blodtryck |
systolic blood pressure |
|
A |
andningfrekvens |
respiratory rate |
|
S |
saturation |
oxygen saturation |
Parameters:
(1) systolic blood pressure in mm Hg
(2) respiratory rate in breaths per minute
(3) oxygen saturation in percent
|
Parameter |
Finding |
Points |
|
systolic blood pressure |
>= 90 mm Hg |
0 |
|
|
< 90 mm Hg |
1 |
|
respiratory rate |
<= 30 breaths per minute |
0 |
|
|
> 30 breaths per minute |
1 |
|
oxygen saturation |
>= 90% |
0 |
|
|
< 90% |
1 |
total score =
= SUM(points for all 3 parameters)
Interpetation:
• minimum score: 0
• maximum score: 3
• The higher the score the more significant the physiologic impact.
• A score >= 1 is considered positive.
Performance:
• Wallgren et al found that the BAS screen was insensitive in the prehospital setting (43%). Increasing the number of items to make the screen positive would reduce sensitivity but probably increase specificity.
• One problem with assessing performance of a prehospital screen is that the reference is status in the Emergency Department which may be some time later. A patient with significant sepsis can deteriorate in that time.
Specialty: Infectious Diseases
