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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  
BUN  
WBC  
Potassium  
Sodium  
Bicarbonate  
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
 
Important: Inputs must be complete to perform calculation.

 
 
SAPS II Score  
Logit  
Hospital Mortality Probability  
 

 
Data action

 
     
 
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 + BicarbonateFactor + BilirubinFactor + SodiumFactor + PotassiumFactor + BUNFactor + Glasgow Coma ScoreFactor + WBCFactor + 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.
  • HeartRateFactor is assigned values by this ordered logic:
    • If Heart Rate ≥160 beats/min, HeartRateFactor = 7
    • Else if Heart Rate ≥120 beats/min, HeartRateFactor = 4
    • Else if Heart Rate ≥70 beats/min, HeartRateFactor = 0
    • Else if Heart Rate ≥40 beats/min, HeartRateFactor = 2
    • Else HeartRateFactor = 11.
  • SystolicBloodPressureFactor is assigned values by this ordered logic:
    • If Systolic Blood Pressure ≥200 mmHg, SystolicBloodPressureFactor = 2
    • Else if Systolic Blood Pressure ≥100 mmHg, SystolicBloodPressureFactor = 0
    • Else if Systolic Blood Pressure ≥70 mmHg, SystolicBloodPressureFactor = 5
    • Else SystolicBloodPressureFactor = 13.
  • TemperatureFactor is assigned values by this ordered logic:
    • If Temperature ≥39 degC, TemperatureFactor = 3
    • Else TemperatureFactor = 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 PaO2/FIO2 ≥200 mmHg/FIO2, pafiFactor = 6
    • Else if PaO2/FIO2 ≥100 mmHg/FIO2, pafiFactor = 9
    • Else pafiFactor = 11.
  • UOFactor is assigned values by this ordered logic:
    • If Urine Output ≥1000 mL/day, UOFactor = 0
    • Else if Urine Output ≥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.
  • PotassiumFactor is assigned values by this ordered logic:
    • If Potassium ≥5 mmol/L, PotassiumFactor = 3
    • Else if Potassium ≥3 mmol/L, PotassiumFactor = 0
    • Else PotassiumFactor = 3.
  • SodiumFactor is assigned values by this ordered logic:
    • If Sodium ≥145 mmol/L, SodiumFactor = 1
    • Else if Sodium ≥125 mmol/L, SodiumFactor = 0
    • Else SodiumFactor = 5.
  • BicarbonateFactor is assigned values by this ordered logic:
    • If Bicarbonate ≥20 mEq/L, BicarbonateFactor = 0
    • Else if Bicarbonate ≥15 mEq/L, BicarbonateFactor = 3
    • Else BicarbonateFactor = 6.
  • BilirubinFactor is assigned values by this ordered logic:
    • If Bilirubin ≥6 mg/dL, BilirubinFactor = 9
    • Else if Bilirubin ≥4 mg/dL, BilirubinFactor = 4
    • Else BilirubinFactor = 0.
  • GCSFactor is assigned values by this ordered logic:
    • If Glasgow Coma Score ≥14 points, GCSFactor = 0
    • Else if Glasgow Coma Score ≥11 points, GCSFactor = 5
    • Else if Glasgow Coma Score ≥9 points, GCSFactor = 7
    • Else if Glasgow Coma Score ≥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 PubMedLink

 
Associated Logical Observation Identifiers Names and Codes [LOINC]
 
Parameter LOINC's and Suggested Units
Age 21612-7 : yr      21612-7 : yr      21612-7 : years      30525-0 : Years old      30525-0 : yr      30525-0 : years      
Heart Rate 8867-4 : beats/min      8893-0 : beats/min      8890-6 : beats/min      8889-8 : beats/min      68999-2 : beats/min      76282-3 : beats/min      69000-8 : beats/min      69001-6 : beats/min      
Systolic Blood Pressure 8480-6 : mmHg      
Temperature 8329-5 : degC      8310-5 : degC      8331-1 : degC      8332-9 : degC      8333-7 : degC      8328-7 : degC      75539-7 : degC      
BUN 3094-0 : mg/dL      6299-2 : mg/dL      14937-7 : mmol/L      59570-2 : mmol/L      
WBC 6690-2 : #/microL      
Potassium 2823-3 : mEq/L      6298-4 : mEq/L      
Sodium 2951-2 : mmol/L      2947-0 : mEq/L      32340-2 : mEq/L      39791-9 : mEq/L      
Bicarbonate 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      
Bilirubin 1975-2 : mg/dL      32303-0 : mmol/L      59828-4 : mg/dL      54363-7 : mcmol/L      58941-6 : mg/dL      
GCS 9269-2 : score      35088-4 : score      

 
This material contains content from LOINC (http://loinc.org). LOINC is copyright © 1995-2023, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license. LOINC® is a registered United States trademark of Regenstrief Institute, Inc.

 
Associated ICD10-CM Codes
 
   J96.90Respiratory failure, unspecified, unspecified whether with hypoxia or hypercapnia
   J96.00Acute respiratory failure, unspecified whether with hypoxia or hypercapnia
   A41.9Sepsis, unspecified organism
   I50.9Heart failure, unspecified
   I50.9Heart failure, unspecified
   N19Unspecified kidney failure

 
Associated ICD9-CM Codes
 
   584.9Acute renal failure nos
   586Renal failure nos
   428.9Heart failure nos
   038.9Septicemia nos
   518.81Acute respiratry failure

 

 
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