Serum Osmolality/Osmolarity
Serum Osmolality (US) = (2 * (Na) + (BUN / 2.8) + (glucose / 18) + (ethanol/4.6); SI units ares all molar, so no need to divide by 2.8 or 18 or 4.6.
Posted in: Endocrine/Metabolic • Endocrinology • Nephrology • Renal
NOTE: All calculations must be re-checked and should not be used alone to guide patient care. See disclaimer.
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- Calcium Correction for Hypoalbuminemia
- Hunt and Hess Classification of Subarachnoid Hemorrhage (SAH)
- TIMI Risk Score for STEMI
- Transtubular Potassium Gradient (TTKG)
- PELD Score (Pediatric End-Stage Liver Disease) (younger than 12)
- Ranson's Criteria for Pancreatitis Mortality
- Intracerebral Hemorrhage (ICH) Score
- Framingham Cardiac Risk Score
- MELD Score (Model For End-Stage Liver Disease) (12 and older)
- Framingham Cardiac Risk Score (SI Units)
Equations
- A-a O2 Gradient
- Absolute Neutrophil Count (ANC)
- Absolute Reticulocyte Count (Reticulocyte Index)
- Age
- Anion Gap
- Basal Energy Expenditure
- Bayesian Sensitivty, Specificity, Probabilities
- Bicarbonate Deficit
- BMI and Body Surface Area (BSA)
- Calcium Correction for Hypoalbuminemia
- Corrected QT Interval (QTc)
- Creatinine Clearance (Cockcroft-Gault Equation)
- CSF WBC Correction for RBCs
- Endotracheal Tube (ETT) Size for Pediatrics
- Fractional Excretion of Sodium (FENa)
- Fractional Excretion of Urea (FEUrea)
- Free Water Deficit in Hypernatremia
- Ideal Body Weight
- LDL Calculated
- Maintenance Fluids Calculations
- MDRD GFR Equation
- Mean Arterial Pressure (MAP)
- Oxygenation Index
- Parkland Formula for Burns
- Pediatric Ins and Outs (per kg and per hour)
- Phenytoin/Dilantin Correction for Albumin or Renal Failure
- Pregnancy Due Dates Calculator
- Serum Osmolality/Osmolarity
- Sodium Correction for Hyperglycemia
- Sodium Correction Rate in Hyponatremia
- Sodium Deficit in Hyponatremia
- Stool Osmolar/Osmotic Gap
- Transtubular Potassium Gradient (TTKG)
- Winters’ Formula for Metabolic Acidosis Compensation
Scores
- ABCD2 Score for TIA
- APACHE II Score for ICU Mortality
- APGAR Score
- CHADS2 Score for Atrial Fibrillation Stroke Risk
- Child-Pugh Score for Cirrhosis Mortality
- CURB-65 Severity Score for Community-Acquired Pneumonia
- Framingham Cardiac Risk Score
- Framingham Cardiac Risk Score (SI Units)
- Glasgow Coma Scale/Score
- Glasgow-Blatchford Bleeding Score (GBS)
- Hunt and Hess Classification of Subarachnoid Hemorrhage (SAH)
- Intracerebral Hemorrhage (ICH) Score
- King’s College Criteria
- Maddrey’s Discriminant Function for Alcoholic Hepatitis
- Mangled Extremity Severity Score (MESS Score)
- MELD Score (Model For End-Stage Liver Disease) (12 and older)
- Modified Centor Score for Strep Pharyngitis
- Ottawa and Pittsburgh Knee Rules
- Ottawa Ankle Rules
- Parkland Formula for Burns
- PELD Score (Pediatric End-Stage Liver Disease) (younger than 12)
- PERC Rule for Pulmonary Embolism
- PSI/PORT Score: Pneumonia Severity Index for Adult CAP
- Ranson’s Criteria for Pancreatitis Mortality
- San Francisco Syncope Rule to Predict Serious Outcomes
- TIMI Risk Score for STEMI
- TIMI Risk Score for UA/NSTEMI
- Well’s Criteria for DVT
- Well’s Criteria for Pulmonary Embolism / PE