Clinical Tools - Dr. Sagar

General Medicine

BMI Calculator

Body Mass Index — classify weight category per WHO standards.

WHO: <18.5 Underweight · 18.5–24.9 Normal · 25–29.9 Overweight · ≥30 Obese

Paediatrics

Pediatric Dose Calculator

Calculate exact child dosage based on weight and mg/kg formulation.

Pharmacology

Tablet / Unit Dosage

Calculate how many tablets or ml of liquid to administer.

Nephrology

eGFR (Cockcroft-Gault)

Estimate creatinine clearance for renal function & drug dosing.

Obstetrics

Pregnancy EDD

Calculate Estimated Date of Delivery based on LMP (Naegele's rule).

Critical Care

IV Drip Rate

Calculate drops per minute (gtt/min) for intravenous infusions.

Cardiovascular

Mean Arterial Pressure

MAP from BP readings — assess organ perfusion adequacy.

Normal: 70–100 mmHg. MAP <60 → inadequate perfusion.

General Medicine

Ideal Body Weight (IBW)

Devine Formula — medication dosing, ventilator TV, nutrition.

Cardiology

Corrected QT (QTc)

Bazett's formula — QT prolongation risk & TdP danger.

General Medicine

Body Surface Area (BSA)

Mosteller formula for chemo, renal dosing, and burn assessment.

Nephrology

Corrected Calcium

Adjusts total calcium for albumin level (hypoalbuminemia).

Formula: Measured Ca + 0.8 × (4.0 - Albumin)

Endocrinology

Corrected Sodium

Adjusts sodium for hyperglycemia (DKA, HHS).

Nephrology

Anion Gap

Evaluate for High Anion Gap Metabolic Acidosis (MUDPILES).

Normal: 8–12 mEq/L

Paediatrics

Pediatric Maintenance IV Fluid

Holliday-Segar (4-2-1 rule) for hourly maintenance fluid.

Hepatology

MELD Score

Model for End-Stage Liver Disease (mortality risk).

Pulmonology

A-a Gradient

Alveolar-arterial gradient for working up hypoxia.

Cardiology

Wells Score (DVT)

Clinical probability of Deep Vein Thrombosis.

0

Low Risk (Probability 5%)

Cardiology

Wells Score (PE)

Clinical probability of Pulmonary Embolism.

Clinical symptoms of DVT (leg swelling, pain)+3 points

Alternative diagnosis less likely than PE+3 points

Heart rate > 100 bpm+1.5 points

Immobilization >3 days or surgery <4 weeks+1.5 points

Previous DVT or PE+1.5 points

Hemoptysis+1 points

Active cancer+1 points

0

PE Unlikely (Probability 12%)

Cardiology

CHA₂DS₂-VASc Score

Stroke risk in atrial fibrillation (A-fib).

Congestive Heart Failure / LV dysfunction+1 points

Hypertension+1 points

Age ≥75 years+2 points

Diabetes Mellitus+1 points

Stroke / TIA / Thromboembolism+2 points

Vascular disease (prior MI, PAD, aortic plaque)+1 points

Age 65-74 years+1 points

Sex category (Female)+1 points

0

Low Risk (0% stroke risk/yr)

Cardiology

HAS-BLED Score

1-year risk of major bleeding in patients with atrial fibrillation.

Hypertension (uncontrolled, >160 mmHg systolic)+1 points

Abnormal renal function (Dialysis, transplant, Cr >2.26 mg/dL)+1 points

Abnormal liver function (Cirrhosis or Bilirubin >2x Normal with AST/ALT/AP >3x Normal)+1 points

Stroke history+1 points

Bleeding history or predisposition (anemia)+1 points

Labile INRs (unstable/high INRs or in therapeutic range < 60% of time)+1 points

Elderly (Age > 65 years)+1 points

Drugs predisposing to bleeding (Antiplatelets, NSAIDs)+1 points

Drugs/Alcohol use (≥ 8 drinks/week)+1 points

0

Low Risk (1.13% bleeding risk)

Surgery

Alvarado Score

Probability of Acute Appendicitis.

Migratory RIF pain+1 points

Anorexia+1 points

Nausea and vomiting+1 points

Tenderness in RIF+2 points

Rebound tenderness in RIF+1 points

Elevated temperature (>37.3°C / 99.1°F)+1 points

Leukocytosis (>10,000 WBC)+2 points

Shift of WBC to the left+1 points

0

Low Probability of Appendicitis

Pulmonology

CURB-65 Score

Pneumonia severity and mortality risk.

Confusion (AMTS ≤ 8 or disorientation)+1 points

Urea > 7 mmol/L (BUN > 19 mg/dL)+1 points

Respiratory rate ≥ 30 breaths/min+1 points

Blood pressure (SBP < 90 mmHg or DBP ≤ 60 mmHg)+1 points

Age ≥ 65 years+1 points

0

Outpatient Care (Mortality 0.6%)

ICU

qSOFA Score

Quick assessment for sepsis-related poor outcomes.

Altered mental status (GCS < 15)+1 points

Respiratory rate ≥ 22 breaths/min+1 points

Systolic blood pressure ≤ 100 mmHg+1 points

0

Not high risk for sepsis

Emergency

Glasgow Coma Scale (GCS)

Level of consciousness in trauma and acute brain injury.

15

Normal (Mild: 13-15)

Nephrology

CKD-EPI (2021) eGFR

Current recommended formula for eGFR (race-free).

Nephrology

Fractional Excretion of Na (FENa)

Differentiate pre-renal from intrinsic AKI.

<1% = Pre-renal | >2% = ATN (in oliguric patients)

Emergency

Absolute Neutrophil Count (ANC)

Determine risk of infection in neutropenic patients.

Pulmonology

Winter's Formula

Expected PCO₂ respiratory compensation in metabolic acidosis.

Endocrinology

Serum Osmolality

Estimate serum osmolality and evaluate for osmolar gap.

Drug Reference

Common Drug Dosage Reference

Standard adult dosages of frequently prescribed medications.

Drug	Standard Adult Dose	Max/Day	Notes
Paracetamol	500–1000 mg q4–6h	4000 mg	Reduce to 2g in liver disease
Ibuprofen	400–600 mg q6–8h	2400 mg	Take with food; avoid in renal impairment
Amoxicillin	500 mg q8h or 875 mg q12h	3000 mg	Adjust if GFR <30
Azithromycin	500 mg D1, then 250 mg OD ×4	500 mg	Z-pack regimen
Metformin	500–1000 mg BD with meals	2550 mg	Hold if GFR <30
Omeprazole	20–40 mg OD before meals	80 mg	Higher doses for H. pylori
Amlodipine	5–10 mg OD	10 mg	Start low in elderly
Atenolol	25–100 mg OD	100 mg	Reduce in renal impairment
Diclofenac	50 mg BD–TDS	150 mg	GI protection recommended
Ciprofloxacin	500–750 mg BD	1500 mg	Avoid antacids; monitor QTc
Metronidazole	400–500 mg TDS	1500 mg	Avoid alcohol; reduce in liver dz
Prednisolone	5–60 mg OD	Variable	Taper when stopping long-term

⚠ For educational use only. Always consult current drug formularies.

Emergency

Fluid Deficit Calculator

Calculate dehydration fluid deficit and replacement.

Paediatrics

Schwartz eGFR

Estimate GFR in children (updated bedside formula).

Obstetrics

Bishop Score

Assess cervical favorability for labor induction.

Dilation (cm)

Effacement (%)

Station

Consistency

Position

0

Unfavorable

Endocrinology

DKA Severity Classifier

ADA classification for Diabetic Ketoacidosis severity.

Nephrology

Electrolyte Replacement

Replacement protocols for Potassium, Magnesium & Phosphate.

Pulmonology

ABG Interpreter ★ Most Requested

Identifies primary disorder, compensation, and calculates Anion Gap/Delta ratio.

Gastroenterology

Glasgow-Blatchford Score

Risk of needing intervention in upper GI bleeding.

BUN (mg/dL)

Hemoglobin for Men (g/dL)

Hemoglobin for Women (g/dL)

Systolic BP (mmHg)

Other Risk Factors (Select all that apply) Heart Rate ≥100 (+1) Melena (+1) Syncope (+2) Hepatic Disease (+2) Heart Failure (+2)

0

Low Risk (Score 0)

ICU

APACHE II Score

ICU mortality prediction based on worst values in initial 24 hours.

Age (Years)

History of Severe Organ Insufficiency or Immunocompromised

Temperature (°C)

MAP (mmHg)

Heart Rate

Respiratory Rate

Arterial pH

Serum Sodium

Serum Potassium

Serum Creatinine (mg/dL)

WBC Count (x1000)

Glasgow Coma Scale

Note: GCS points are 15 minus actual GCS. Double Cr points for acute renal failure.

0

Estimated Mortality: ~4%

Pharmacology

Drug Interaction Checker ★ Top 30 Critical Pairs

Check common and severe drug-drug interactions (educational only).

Clinical Tools & Calculators

Medical Calculators

BMI Calculator

Pediatric Dose Calculator

Tablet / Unit Dosage

eGFR (Cockcroft-Gault)

Pregnancy EDD

IV Drip Rate

Mean Arterial Pressure

Ideal Body Weight (IBW)

Corrected QT (QTc)

Body Surface Area (BSA)

Corrected Calcium

Corrected Sodium

Anion Gap

Pediatric Maintenance IV Fluid

MELD Score

A-a Gradient

Wells Score (DVT)

Wells Score (PE)

CHA₂DS₂-VASc Score

HAS-BLED Score

Alvarado Score

CURB-65 Score

qSOFA Score

Glasgow Coma Scale (GCS)

Eye Opening (E)

Verbal Response (V)

Motor Response (M)

CKD-EPI (2021) eGFR

Fractional Excretion of Na (FENa)

Absolute Neutrophil Count (ANC)

Winter's Formula

Serum Osmolality

Common Drug Dosage Reference

Fluid Deficit Calculator

Schwartz eGFR

Bishop Score

DKA Severity Classifier

Electrolyte Replacement

ABG Interpreter ★ Most Requested

Glasgow-Blatchford Score

APACHE II Score

Drug Interaction Checker ★ Top 30 Critical Pairs

Calculation History