MDCalc

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Equations

• A-a O₂ Gradient
• Abs Neutrophil Count
• Abs Retic Count (Retic Index)
• Age
• Anion Gap (w/Delta Gap)
• Basal Energy Expenditure
• Bayes Sensitivty & Specificity
• Bicarb Deficit
• BMI/Surface Area
• Calcium Correction in Hypoalbuminemia
• Cockcroft-Gault GFR
• Cardiac Output (Fick)
• Corrected QT (QTc)
• Corrected Sodium
• CSF WBC Correction for RBCs
• Endotracheal Tube Size for Children
• FENa
• FEUrea
• Ideal Body Weight by Height
• LDL (Calculated)
• Maddrey's Discriminant Function
• Maintenance Fluids
• MDRD GFR
• Mean Arterial Pressure (MAP)
• Oxygenation Index
• Parkland Burns
• Pedi Ins & Outs
• Sodium Deficit
• Serum Osmolality
• Stool Osmolal Gap
• Transtubular Potassium Gradient
• Water Deficit
• Winter's Formula

Scores

• APACHE II Score for ICU Mortality
• APGAR Score
• Cardiac Risk (Framingham)
• CHADS2 Score for Afib
• PORT Score / CAP Risk
• Glasgow Coma Score
• MELD Score
• Ottawa Ankle and Pittsburgh Knee Rules
• Ranson's Pancreatitis Mortality
• San Francisco Syncope Rule
• Strep Probability Score
• TIMI Score for UA/NSTEMI
• TIMI Score for STEMI
• Well's Criteria for PE

San Francisco Syncope Rule to Predict Serious Outcomes

Congestive Heart Failure history?	Yes +1
Hematocrit < 30%?	Yes +1
ECG Abnormal ?	Yes +1
Shortness of Breath History?	Yes +1
Systoplic BP < 90 mmHg at Triage?	Yes +1
Score	points

Note: This rule has a 96% sensitivity and 62% specificity for serious outcome. Negative predictive value: 99.2%; positive predictive value 24.8%.

Serious Outcome in this study is defined as "death, myocardial infarction, arrhythmia, pulmonary embolism, stroke, subarachnoid hemorrhage, significant hemorrhage, or any condition causing a return ED visit and hospitalization for a related event."