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  SAPS II: Simplified Acute Physiology Score II

 
Input
 
Age  
Heart rate  
Systolic blood pressure  
Temperature  
On ventilator or BiPAP within 24 hours No (0)

Yes (1)
PaO2/FIO2  
Urine output  
Serum BUN  
White blood cell count  
Serum potassium  
Serum sodium  
Serum bicarbonate  
Serum bilirubin  
Glasgow coma score  
Chronic diseases No (0)

Metastatic cancer (9)

Hematologic malignancy (10)

AIDS (17)
Admission type Scheduled surgery (0)

Medical (6)

Unscheduled surgery (8)

 
Results
 
 
SAPS II Score  
Logit  
Hospital Mortality Probability  
 

 
     
 
Include literature references: Yes   No
 
Notes
  • For the SAPS 2 score to be correct, a value must be selected for every variable.

 
Equations used
 
SAPS II Score = AgeFactor + TemperatureFactor + Systolic blood pressureFactor + Heart rateFactor + (On ventilator or BiPAP within 24 hours * PaO2/FIO2Factor ) + Urine outputFactor + Serum bicarbonateFactor + Serum bilirubinFactor + Serum sodiumFactor + Serum potassiumFactor + Serum BUNFactor + Glasgow coma scoreFactor + White blood cell countFactor + Chronic diseases + Admission type
Logit = (0.0737 * SAPS II Score)+ (0.9971 * ln(SAPS II Score + 1)) -7.7631
Hospital Mortality Probability = 100 * e(Logit) / (1 + e(Logit))

 
Calculation Details and Variables
  • AgeFactor is assigned values by this ordered logic:
    • If Age <40 yr AgeFactor = 0
    • Else if Age <60 yr AgeFactor = 7
    • Else if Age <70 yr AgeFactor = 12
    • Else if Age <75 yr AgeFactor = 15
    • Else if Age <80 yr AgeFactor = 16
    • Else AgeFactor = 18.
  • HRFactor is assigned values by this ordered logic:
    • If HR ≥160 beats/min HRFactor = 7
    • Else if HR ≥120 beats/min HRFactor = 4
    • Else if HR ≥70 beats/min HRFactor = 0
    • Else if HR ≥40 beats/min HRFactor = 2
    • Else HRFactor = 11.
  • SBPFactor is assigned values by this ordered logic:
    • If SBP ≥200 mmHg SBPFactor = 2
    • Else if SBP ≥100 mmHg SBPFactor = 0
    • Else if SBP ≥70 mmHg SBPFactor = 5
    • Else SBPFactor = 13.
  • TempFactor is assigned values by this ordered logic:
    • If Temp ≥39 degC TempFactor = 3
    • Else TempFactor = 0.
  • Equation parameters such as On ventilator or BiPAP within 24 hours, have two or more discrete values that may be used in the calculation. The numbers in the parentheses, e.g. (0), represent the values that will be used.
  • pafiFactor is assigned values by this ordered logic:
    • If pafi ≥200 mmHg/FIO2 pafiFactor = 6
    • Else if pafi ≥100 mmHg/FIO2 pafiFactor = 9
    • Else pafiFactor = 11.
  • UOFactor is assigned values by this ordered logic:
    • If UO ≥1000 mL/day UOFactor = 0
    • Else if UO ≥500 mL/day UOFactor = 4
    • Else UOFactor = 11.
  • BUNFactor is assigned values by this ordered logic:
    • If BUN ≥84 mg/dL BUNFactor = 10
    • Else if BUN ≥28 mg/dL BUNFactor = 6
    • Else BUNFactor = 0.
  • WBCFactor is assigned values by this ordered logic:
    • If WBC ≥20 x10(3)/mcL WBCFactor = 3
    • Else if WBC ≥1 x10(3)/mcL WBCFactor = 0
    • Else WBCFactor = 12.
  • KFactor is assigned values by this ordered logic:
    • If K ≥5 mmol/L KFactor = 3
    • Else if K ≥3 mmol/L KFactor = 0
    • Else KFactor = 3.
  • NaFactor is assigned values by this ordered logic:
    • If Na ≥145 mmol/L NaFactor = 1
    • Else if Na ≥125 mmol/L NaFactor = 0
    • Else NaFactor = 5.
  • HCO3Factor is assigned values by this ordered logic:
    • If HCO3 ≥20 mEq/L HCO3Factor = 0
    • Else if HCO3 ≥15 mEq/L HCO3Factor = 3
    • Else HCO3Factor = 6.
  • BiliFactor is assigned values by this ordered logic:
    • If Bili ≥6 mg/dL BiliFactor = 9
    • Else if Bili ≥4 mg/dL BiliFactor = 4
    • Else BiliFactor = 0.
  • GCSFactor is assigned values by this ordered logic:
    • If GCS ≥14 points GCSFactor = 0
    • Else if GCS ≥11 points GCSFactor = 5
    • Else if GCS ≥9 points GCSFactor = 7
    • Else if GCS ≥6 points GCSFactor = 13
    • Else GCSFactor = 26.

 
References
  1. Le Gall JR, Lemeshow S, Saulnier F. A new Simplified Acute Physiology Score (SAPS II) based on a European/North American multicenter study. JAMA. 1993 Dec 22-29;270(24):2957-63. PubMed ID: 8254858 PubMed Logo

 
Associated Logical Observation Identifiers Names and Codes [LOINC]
 
Parameter LOINC's and Suggested Units
Age 21612-7 : Years old      21612-7 : yr      21612-7 : years      30525-0 : Years old      30525-0 : yr      30525-0 : years      
HR 8867-4 : beats/min      
SBP 8480-6 : mmHg      
Temp 8310-5 : degC      
BUN 3094-0 : mg/dL      6299-2 : mg/dL      14937-7 : mmol/L      59570-2 : mmol/L      
WBC 6690-2 : #/microL      
K 2823-3 : mEq/L      6298-4 : mEq/L      
Na 2951-2 : mmol/L      2947-0 : mEq/L      32340-2 : mEq/L      39791-9 : mEq/L      
HCO3 2028-9 : mmol/L      1959-6 : mEq/L      1960-4 : mEq/L      14627-4 : mEq/L      1961-2 : mEq/L      22735-5 : mEq/L      1963-8 : mEq/L      
Bili 32303-0 : mmol/L      1975-2 : mg/dL      59828-4 : mg/dL      54363-7 : mcmol/L      58941-6 : mg/dL      
GCS 35088-4 : score      55285-1 : score      9269-2 : score      

 
This material contains content from LOINC® (http://loinc.org). The LOINC table, LOINC codes, and LOINC panels and forms file are copyright © 1995-2014, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and available at no cost under the license at http://loinc.org/terms-of-use.

 
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