Absolute Neutrophil Count (ANC)

Frequently used to assess neutropenic fever in chemotherapy patients.

Absolute Neutrophil Count

APGAR Score

Assesses neonates 1 and 5 minutes after birth.

Assesses neonates 1 and 5 mins postpartum.

Basal Energy Expenditure

Calculates daily energy expenditure.

Estimates minimum caloric requirements.

Bicarbonate Deficit

Calculates the total body bicarbonate deficit.

Calculates total body bicarb deficit.

BMI Calculator (Body Mass Index and BSA)

Calculates body mass index and body surface area.

Categorizes obesity, assists some med dosing.

BMI & BSA

Calcium Correction for Hypoalbuminemia and Hyperalbuminemia

Calculates a corrected calcium level for patients with hypoalbuminemia or hyperalbuminemia.

Corrects Ca for hypoalbuminemia or hyperalbuminemia.

Ca Correction for Albumin

PSI/PORT Score: Pneumonia Severity Index for CAP

Estimates mortality for adult patients with community-acquired pneumonia.

Mortality in CAP: more complex than CURB-65.

PSI/PORT Score

Framingham Risk Score for Hard Coronary Heart Disease

Estimates 10-year risk of heart attack in patients 30-79 years with no history of CHD or diabetes.

Framingham Risk Score (Hard Coronary Heart Disease)

CHADS₂ Score for Atrial Fibrillation Stroke Risk

Estimates stroke risk in patients with atrial fibrillation.

CHADS₂ Score

Creatinine Clearance (Cockcroft-Gault Equation)

Calculates CrCl according to the Cockcroft-Gault equation.

Estimates creatinine clearance (kidney function).

Creatinine Clearance

Corrected QT Interval (QTc)

Corrects the QT interval for heart rate extremes (choose from Bazett, Fridericia, Framingham, Hodges, or Rautaharju formulas).

Corrected QT (QTc)

Sodium Correction for Hyperglycemia

Calculates the actual sodium level in patients with hyperglycemia.

Maddrey's Discriminant Function for Alcoholic Hepatitis

Predicts prognosis and steroid benefit in alcoholic hepatitis.

Alcoholic Hepatitis prognosis &amp; steroid treatment.

Maddrey's Discriminant Function

Pediatric Endotracheal Tube (ETT) Size

Estimates ET tube size based on age.

Pediatric ET Tube Size

Fractional Excretion of Sodium (FENa)

Determines if renal failure is due to prerenal or intrinsic pathology.

Prerenal or intrinsic kidney failure.

FENa

Fractional Excretion of Urea (FEUrea)

Differentiates between prerenal azotemia and acute tubular necrosis in patients with acute kidney injury. Similar to the <calculator id="60">FENa</calculator>, but can be used on patients on diuretics.

Similar to <calculator id="60">FENa</calculator>; for pts on diuretics.

FEUrea

Glasgow Coma Scale (GCS)

Coma severity based on Eye (4), Verbal (5), and Motor (6) criteria.

Ideal Body Weight and Adjusted Body Weight

Calculates ideal body weight (Devine formula) and adjusted body weight.

Friedewald Equation for Low-Density Lipoprotein Cholesterol (LDL-C)

Calculates LDL-C based on total and HDL cholesterol and triglycerides.

Friedewald Equation for LDL-C

Maintenance Fluids Calculations

Calculates maintenance fluid requirements by weight.

Maintenance Fluids

Mean Arterial Pressure (MAP)

Calculates mean arterial pressure.

MDRD GFR Equation

Estimates GFR in CKD patients using creatinine and patient characteristics.

MELD Na (UNOS/OPTN)

Quantifies end-stage liver disease for transplant planning with sodium.

Oxygenation Index

Predicts outcomes, especially in pediatric patients; helps determine need for ECMO.

Parkland Formula for Burns

Calculates fluid requirements for burn patients in a 24-hour period.

Pediatric Ins and Outs

Calculates fluid status in volume per weight &amp; volume per weight per time, for pediatrics.

PELD Score (Pediatric End-Stage Liver Disease) (younger than 12)

Calculates the pediatric version of the MELD score for liver cirrhosis severity and transplant planning.

PELD Score

Ranson's Criteria for Pancreatitis Mortality

Estimates mortality of patients with pancreatitis, based on initial and 48-hour lab values.

Ranson's Criteria

Serum Osmolality/Osmolarity

Calculates expected serum osmolarity, for comparison to measured osmolality to detect unmeasured compounds in the serum.

Screens for toxic alcohols and more.

Serum Osmolality

San Francisco Syncope Rule

Predicts risk for serious outcomes at 7 days in patients presenting with syncope or near-syncope.

Sodium Deficit in Hyponatremia

Calculates sodium quantity missing in hyponatremia.

Total sodium missing in hyponatremia.

TIMI Risk Score for STEMI

Estimates mortality in patients with STEMI.

TIMI Score for STEMI

Stool Osmolar/Osmotic Gap

Determines if chronic diarrhea is osmotic or secretory in nature.

Chronic Diarrhea: Osmotic vs Secretory.

Centor Score (Modified/McIsaac) for Strep Pharyngitis

Estimates probability that pharyngitis is streptococcal, and suggests management course.

Strep throat diagnosis and treatment.

Centor Score (Modified/McIsaac)

TIMI Risk Score for UA/NSTEMI

Estimates mortality for patients with unstable angina and non-ST elevation MI.

TIMI Score for UA/NSTEMI

Free Water Deficit in Hypernatremia

Calculates free water deficit by estimated total body water in a patient with hypernatremia or dehydration.

Free water deficit in hypernatremia or dehydration.

Wells' Criteria for Pulmonary Embolism

Calculates pre-test probability of PE to determine next steps in evaluation.

Wells' Score for PE

Winters' Formula for Metabolic Acidosis Compensation

Calculates the expected pCO₂&nbsp;compensation in a purely metabolic acidosis.

Expected pCO₂ if pure metabolic acidosis.

Winters' Formula

A-a O₂ Gradient

Assesses for degree of shunting and V/Q mismatch.

ASAS Criteria for Axial Spondyloarthritis (SpA)

Classifies axial spondyloarthritis according to Assessment of Spondyloarthritis International Society (ASAS) criteria.

ASAS Criteria for Axial SpA

CURB-65 Score for Pneumonia Severity

Estimates mortality of community-acquired pneumonia to help determine inpatient vs. outpatient treatment.

Mortality in CAP: inpatient vs outpatient.

CURB-65 Score

Phenytoin (Dilantin) Correction for Albumin/Renal Failure

Corrects serum phenytoin level for renal failure and/or hypoalbuminemia.

Phenytoin (Dilantin) Correction

Child-Pugh Score for Cirrhosis Mortality

Prognosis in cirrhosis; guides treatment.

Child-Pugh Score

PERC Rule for Pulmonary Embolism

Rules out PE if no criteria are present and pre-test probability is &le;15%.

Clinically rules out PE (&lt;2%).

PERC Rule

ABCD² Score for TIA

Estimates the risk of stroke after a suspected transient ischemic attack (TIA).

Stroke risk after TIA: inpt vs outpt.

ABCD² Score

Wells' Criteria for DVT

Calculates risk of DVT based on clinical criteria.

Risk of DVT based on clinical criteria.

Wells' Score for DVT

Ottawa Knee Rule

Describes criteria for knee trauma patients so low risk as not to warrant knee imaging.

Sensitive; rules out imaging in some.

Intracerebral Hemorrhage (ICH) Score

Estimates mortality in ICH based on age and CT findings.

Hunt & Hess Classification of Subarachnoid Hemorrhage

Classifies severity of subarachnoid hemorrhage to predict mortality.

Hunt & Hess Classification

Pregnancy Due Dates Calculator

Calculates pregnancy dates from last period, gestational age, or date of conception.

From LMP, EGA, or date of conception.

Pregnancy Due Dates

Sodium Correction Rate in Hyponatremia and Hypernatremia

Calculates recommended IV fluid type, rate, and volume to correct hyponatremia or hypernatremia at desired rate depending on clinical scenario.

Recommends fluid choice and rate for hyponatremia/hypernatremia treatment.

Sodium Correction Rate in Hyponatremia/Hypernatremia

Glasgow-Blatchford Bleeding Score (GBS)

Stratifies upper GI bleeding patients who are "low-risk" and candidates for outpatient management.

Glasgow-Blatchford Bleeding Score

King's College Criteria for Acetaminophen Toxicity

Recommends who should be immediately referred for liver transplant.

Liver Transplant after acetaminophen OD.

King's College Criteria

Mangled Extremity Severity Score (MESS)

Estimates viability of an extremity after trauma, to determine need for salvage vs empiric amputation.

MESS

Acetaminophen Overdose and NAC Dosing

Calculates PO/IV NAC dosing for acetaminophen overdose (and nomogram to determine toxic 4 hour level).

NAC Dosing (Tylenol OD)

PECARN Pediatric Head Injury/Trauma Algorithm

Predicts need for brain imaging after pediatric head injury.

Clears peds head injury without imaging.

PECARN Pediatric Head Injury Rule

New Orleans/Charity Head Trauma/Injury Rule

Criteria for which patients are unlikely to require imaging after head trauma.

Very sensitive, rules out imaging in some.

New Orleans Head CT Rule

Canadian CT Head Injury/Trauma Rule

Rules out need for head CT in minor head trauma.

Very sensitive, rules out imaging in many.

Canadian CT Head Rule

Alvarado Score for Acute Appendicitis

Predicts likelihood of appendicitis diagnosis.

Alvarado Score

TIMI Risk Index

Provides mortality estimate in patients with ACS using only blood pressure, heart rate, and age.

West Haven Criteria

Defines the stages of hepatic encephalopathy.

Westley Croup Score

Quantifies croup severity (although mainly used for research, not clinically).

Glasgow Alcoholic Hepatitis Score

Predicts mortality in patients with alcoholic hepatitis by lab results and age.

Revised Trauma Score

Quantifies severity of trauma injuries based on GCS, blood pressure, and respiratory rate.

Sequential Organ Failure Assessment (SOFA) Score

Predicts ICU mortality based on lab results and clinical data.

SOFA Score

Canadian C-Spine Rule

Clinically clears cervical spine fracture without imaging in alert, stable trauma patients.

More sens/spec, but more complex, than NEXUS.

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Cutting Through 36 Calculators: How to Actually Diagnose a PE

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Cutting Through 36 Calculators: How to Actually Diagnose a PE