Heparin Weight-Based Protocol (DVT/PE & ACS)

Calculates unfractionated heparin dosing by indication. DVT/PE: bolus 80 units/kg + infusion 18 units/kg/h. ACS (NSTEMI/UA): bolus 60 units/kg (max 4,000 units) + infusion 12 units/kg/h (max 1,000 units/h). Target aPTT 60–100 seconds (1.5–2.5× normal). Adjust per institutional aPTT-based titration nomogram.

Weight (kg)
Height (cm)
⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How to use this calculator

  1. 1

    Enter patient clinical data

    Enter the patient's age, weight, lab values, vitals, or clinical findings into the Heparin Weight-Based Protocol (DVT/PE & ACS) input fields.

  2. 2

    Select the clinical scoring system

    Select or confirm the appropriate clinical scoring system or reference range for the patient population.

  3. 3

    Calculate the clinical score

    Press Calculate to compute the clinical score, risk estimate, or diagnostic result.

  4. 4

    Interpret the result

    Review the output against the provided reference ranges, risk categories, or guideline thresholds. Consult a qualified clinician before acting on results.

Formula

Result = f(patient inputs, clinical reference)

patient inputs
Age, weight, height, lab values, vitals, or clinical findings entered into the Heparin Protocol.
clinical reference
Reference range, scoring system, or population standard the result is compared against.
Result
Computed clinical score, risk estimate, or diagnostic value.

Clinical results are decision-support only and must be interpreted by a qualified clinician.

Glossary and Definitions

Clinical score
A numeric value derived from patient inputs that estimates risk, severity, or diagnostic likelihood for a given condition.
Reference range
The set of values considered normal for a healthy population, used to interpret a calculated result.
Sensitivity
The probability that a positive result correctly identifies a patient with the condition.
Specificity
The probability that a negative result correctly identifies a patient without the condition.
Heparin
A key concept referenced by the Heparin Protocol: Calculates unfractionated heparin dosing by indication. DVT/PE: bolus 80 units/kg + infusion 18 units/kg/h. ACS (NSTEMI/UA): bolus 60 units/kg (max 4,000 units) + infusion 12 units/kg/h (max 1,000 units/h). Target aPTT 60–100 seconds (1.5–2.5× normal). Adjust per institutional aPTT-based titration nomogram.
Unfractionated heparin
A key concept referenced by the Heparin Protocol: Calculates unfractionated heparin dosing by indication. DVT/PE: bolus 80 units/kg + infusion 18 units/kg/h. ACS (NSTEMI/UA): bolus 60 units/kg (max 4,000 units) + infusion 12 units/kg/h (max 1,000 units/h). Target aPTT 60–100 seconds (1.5–2.5× normal). Adjust per institutional aPTT-based titration nomogram.
Weight-based heparin
A key concept referenced by the Heparin Protocol: Calculates unfractionated heparin dosing by indication. DVT/PE: bolus 80 units/kg + infusion 18 units/kg/h. ACS (NSTEMI/UA): bolus 60 units/kg (max 4,000 units) + infusion 12 units/kg/h (max 1,000 units/h). Target aPTT 60–100 seconds (1.5–2.5× normal). Adjust per institutional aPTT-based titration nomogram.
DVT
A key concept referenced by the Heparin Protocol: Calculates unfractionated heparin dosing by indication. DVT/PE: bolus 80 units/kg + infusion 18 units/kg/h. ACS (NSTEMI/UA): bolus 60 units/kg (max 4,000 units) + infusion 12 units/kg/h (max 1,000 units/h). Target aPTT 60–100 seconds (1.5–2.5× normal). Adjust per institutional aPTT-based titration nomogram.
PE
A key concept referenced by the Heparin Protocol: Calculates unfractionated heparin dosing by indication. DVT/PE: bolus 80 units/kg + infusion 18 units/kg/h. ACS (NSTEMI/UA): bolus 60 units/kg (max 4,000 units) + infusion 12 units/kg/h (max 1,000 units/h). Target aPTT 60–100 seconds (1.5–2.5× normal). Adjust per institutional aPTT-based titration nomogram.
ACS
A key concept referenced by the Heparin Protocol: Calculates unfractionated heparin dosing by indication. DVT/PE: bolus 80 units/kg + infusion 18 units/kg/h. ACS (NSTEMI/UA): bolus 60 units/kg (max 4,000 units) + infusion 12 units/kg/h (max 1,000 units/h). Target aPTT 60–100 seconds (1.5–2.5× normal). Adjust per institutional aPTT-based titration nomogram.
Anticoagulation
A key concept referenced by the Heparin Protocol: Calculates unfractionated heparin dosing by indication. DVT/PE: bolus 80 units/kg + infusion 18 units/kg/h. ACS (NSTEMI/UA): bolus 60 units/kg (max 4,000 units) + infusion 12 units/kg/h (max 1,000 units/h). Target aPTT 60–100 seconds (1.5–2.5× normal). Adjust per institutional aPTT-based titration nomogram.
APTT
A key concept referenced by the Heparin Protocol: Calculates unfractionated heparin dosing by indication. DVT/PE: bolus 80 units/kg + infusion 18 units/kg/h. ACS (NSTEMI/UA): bolus 60 units/kg (max 4,000 units) + infusion 12 units/kg/h (max 1,000 units/h). Target aPTT 60–100 seconds (1.5–2.5× normal). Adjust per institutional aPTT-based titration nomogram.
UFH
A key concept referenced by the Heparin Protocol: Calculates unfractionated heparin dosing by indication. DVT/PE: bolus 80 units/kg + infusion 18 units/kg/h. ACS (NSTEMI/UA): bolus 60 units/kg (max 4,000 units) + infusion 12 units/kg/h (max 1,000 units/h). Target aPTT 60–100 seconds (1.5–2.5× normal). Adjust per institutional aPTT-based titration nomogram.
NSTEMI
A key concept referenced by the Heparin Protocol: Calculates unfractionated heparin dosing by indication. DVT/PE: bolus 80 units/kg + infusion 18 units/kg/h. ACS (NSTEMI/UA): bolus 60 units/kg (max 4,000 units) + infusion 12 units/kg/h (max 1,000 units/h). Target aPTT 60–100 seconds (1.5–2.5× normal). Adjust per institutional aPTT-based titration nomogram.

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Frequently Asked Questions