Asuzu et al reported the FAS score for predicting post-operative complications in a patient undergoing open surgical adhesiolysis for small bowel obstruction. The authors are from Yale University and Harvard University.
Patient selection: open surgical adhesiolysis for small bowel obstruction
FAS is an acronym for functional status, ASA classification and prior sepsis.
Parameters:
(1) preoperative functional status
(2) ASA classification
(3) history of prior sepsis
|
Parameter
|
Finding
|
Points
|
|
preoperative functional status
|
independent
|
1
|
|
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partially dependent
|
2
|
|
|
total dependent
|
3
|
|
ASA classification
|
ASA 1
|
1
|
|
|
ASA 2
|
2
|
|
|
ASA 3
|
3
|
|
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ASA 4
|
4
|
|
|
ASA 5
|
5
|
|
history of sepsis
|
none
|
0
|
|
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SIRS
|
1
|
|
|
sepsis
|
2
|
|
|
septic shock
|
3
|
total score =
= (6 * (points for functional status)) + (6 * (points for ASA status)) + (4 * (points for sepsis))
value of X =
= (0.58 * (points for functional status)) + (0.6 * (points for ASA status)) + (0.42 * (points for sepsis)) - 3.73
probability of postoperative complications =
= 1 / (1 + EXP((-1) * X))
Interpretation:
• minimum total score: 12
• maximum total score: 60
The authors also reported a FAST score which is the FAS score plus operative time in minutes (T). This is suitable for post-operative patient assessment.
Performance:
• The area under the ROC curve is 0.68.
