The Simplified Acute Physiology Score (SAPS) is a simplified version of the APACHE acute physiology score (APS). It provides a simply calculated score using clinical data ; the score correlates with a patient's mortality rate in the ICU.
Data:
(1) collected during the first 24 hours after ICU admission
(2) 14 data items, versus 34 items in the APACHE APS
|
Parameter |
Finding |
Points |
|---|---|---|
|
age in years |
<= 45 |
0 |
|
|
46 – 55 |
1 |
|
|
55 – 65 |
2 |
|
|
66 – 75 |
3 |
|
|
> 75 |
4 |
|
heart rate (beats per minute) |
>= 180 |
4 |
|
|
140 – 179 |
3 |
|
|
110 – 139 |
2 |
|
|
70 – 109 |
0 |
|
|
55 – 69 |
2 |
|
|
40 – 54 |
3 |
|
|
< 40 |
4 |
|
systolic blood pressure (mm Hg) |
>= 190 |
4 |
|
|
150 – 189 |
2 |
|
|
80 – 149 |
0 |
|
|
55 – 79 |
2 |
|
|
< 55 |
4 |
|
body temperature (°C) |
>= 41 |
4 |
|
|
39 – 40.9 |
3 |
|
|
38.5 – 38.9 |
1 |
|
|
36 – 38.4 |
0 |
|
|
34 - 35.9 |
1 |
|
|
32 – 33.9 |
2 |
|
|
30 – 31.9 |
3 |
|
|
< 30 |
4 |
|
spontaneous respiratory rate (breaths/min) |
>= 50 |
4 |
|
|
35 – 49 |
3 |
|
|
25 – 34 |
1 |
|
|
12 – 24 |
0 |
|
|
10 – 11 |
1 |
|
|
6 – 9 |
2 |
|
|
< 6 |
4 |
|
|
on ventilation or CPAP |
3 |
|
urinary output (L per 24 hours) |
>= 5.00 |
2 |
|
|
3.5 – 4.99 |
1 |
|
|
0.70 – 3.49 |
0 |
|
|
0.50 – 0.69 |
2 |
|
|
0.20 – 0.49 |
3 |
|
|
< 0.20 |
4 |
|
blood urea nitrogen in mg/dL |
>= 154 |
4 |
|
|
101 – 153 |
3 |
|
|
81 – 100 |
2 |
|
|
21 – 80 |
1 |
|
|
10 – 20 |
0 |
|
|
< 10 |
1 |
|
hematocrit in percent |
>= 60 |
4 |
|
|
50 – 59.9 |
2 |
|
|
46 – 49.9 |
1 |
|
|
30 – 45.9 |
0 |
|
|
20.0 – 29.9 |
2 |
|
|
< 20.0 |
4 |
|
white blood cell count (1000/µL) |
>= 40 |
4 |
|
|
20 – 39.9 |
2 |
|
|
15 – 19.9 |
1 |
|
|
3.0 – 14.9 |
0 |
|
|
1.0 – 2.9 |
2 |
|
|
< 1.0 |
4 |
|
serum glucose in mg/dL |
>= 800 |
4 |
|
|
500 – 799 |
3 |
|
|
250 – 499 |
1 |
|
|
70 – 249 |
0 |
|
|
50 – 69 |
2 |
|
|
29 – 49 |
3 |
|
|
< 29 |
4 |
|
serum potassium in mEq/L |
>= 7.0 |
4 |
|
|
6.0 – 6.9 |
3 |
|
|
5.5 – 5.9 |
1 |
|
|
3.5 – 5.4 |
0 |
|
|
3.0 – 3.4 |
1 |
|
|
2.5 – 2.9 |
2 |
|
|
< 2.5 |
4 |
|
serum sodium in mEq/L |
>= 180 |
4 |
|
|
161 – 179 |
3 |
|
|
156 – 160 |
2 |
|
|
151 – 155 |
1 |
|
|
130 – 150 |
0 |
|
|
120 – 129 |
2 |
|
|
110 – 110 |
3 |
|
|
< 110 |
4 |
|
serum HCO3 in mEq/L |
>= 40 |
3 |
|
|
30 – 39.9 |
1 |
|
|
20 – 29.9 |
0 |
|
|
10 – 19.9 |
1 |
|
|
5.0 – 9.9 |
3 |
|
|
< 5.0 |
4 |
|
Glasgow Coma Score |
13 – 15 |
0 |
|
|
10 – 12 |
1 |
|
|
7 – 9 |
2 |
|
|
4 – 6 |
3 |
|
|
3 |
4 |
where:
• glucose converted from mmol/L to mg/dL (multiply mmol/L by 18.018)
• blood urea nitrogen converted from mmol/L to mg/dL (multiple mmol/L by 2.801)
SAPS score =
= SUMMATION (points for each data item)
Interpretation:
• minimum score: 0
• maximum score: 56
|
SAPS |
Mortality Rate |
|---|---|
|
4 |
|
|
5-6 |
10.7 +/- 4.1 |
|
7-8 |
13.3 +/- 3.9 |
|
9-10 |
19.4 +/- 7.8 |
|
11-12 |
24.5 +/- 4.1 |
|
13-14 |
30.0+/- 5.5 |
|
15-16 |
32.1 +/- 5.1 |
|
17-18 |
44.2 +/- 7.6 |
|
19-20 |
50.0 +/- 9.4 |
|
>= 21 |
81.1+/- 5.4 |
Specialty: Critical Care, Emergency Medicine
