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Caprini Score (VTE Risk, 2005)

Written by the Elysia Tools team · Last updated：2026-08-07

This tool is for informational purposes only and does not constitute medical, financial, or legal advice; consult a qualified professional for advice.

Calculate the 2005 Caprini Risk Assessment Model to stratify venous thromboembolism (VTE) risk in surgical patients. ~40 items weighted 1/2/3/5 points: 1 point (age 41-60, minor surgery, BMI >25, swollen legs, varicose veins, pregnancy/postpartum, recurrent miscarriage, OCP/HRT, sepsis <1mo, lung disease/pneumonia <1mo, COPD, acute MI, CHF <1mo, bedridden, medical bed rest, IBD); 2 points (age 61-74, arthroscopic surgery, major open surgery >45min, laparoscopic >45min, malignancy, bed >72h, plaster cast, central line); 3 points (age ≥75, personal/family VTE history, factor V Leiden, prothrombin 20210A, lupus anticoagulant, anticardiolipin, homocysteine, HIT, other thrombophilia); 5 points (stroke <1mo, elective major lower-extremity arthroplasty, hip/pelvis/leg fracture <1mo, acute spinal cord injury <1mo, multiple trauma <1mo). Management tiers: 0 lowest, 1-4 low-moderate (mechanical), 5-6 high (consider LMWH 7-10d), 7-8 high (LMWH 7-10d), ≥9 highest (LMWH 30d). Derived from Caprini 2005. Not medical advice.

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Tool usage guide

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Key facts

Category
Health
Input types
checkbox
Output type
json
Sample coverage
4
API ready
Yes

Overview

The Caprini Score calculator applies the 2005 Caprini Risk Assessment Model to selected risk factors in surgical patients, adds the assigned points, and returns a total score, risk category, and model-based interpretation for venous thromboembolism (VTE) risk. It is not medical advice.

When to use

  • Estimate VTE risk for a surgical patient using the 2005 Caprini RAM.

© 2026 Elysia Tools. All rights reserved.

Review how age, surgery type, cancer, immobility, prior VTE, and thrombophilia affect the total score.
  • Use the calculated score and interpretation as structured information to discuss with a qualified clinician.

    • How it works

    1. 1Select every checkbox that matches the patient's documented risk factors.
    2. 2Each selected factor contributes 1, 2, 3, or 5 points according to the Caprini 2005 model.
    3. 3The calculator adds the points and assigns a risk category based on the total.
    4. 4The JSON result includes the total, point-group subtotals, category, interpretation, and model name.

    Use cases

    • Preoperative VTE risk review for patients undergoing minor, open, laparoscopic, arthroscopic, or lower-extremity surgery.
    • Structured assessment of patients with malignancy, immobility, previous VTE, family history, or thrombophilia.
    • Educational review of how individual risk factors combine into Caprini risk categories.

    Examples

    1. Older patient with cancer and prior VTE

    Surgical risk reviewer

    Background

    A patient aged 61–74 years has a planned major open surgery, a current or previous malignancy, and a personal history of VTE.

    Problem

    Calculate the combined Caprini score and identify the resulting risk category.

    How to use

    Select Age 61–74 years, Major open surgery (> 45 min), Malignancy, and Personal history of VTE.

    Selected points: age 61–74 (2) + major open surgery (2) + malignancy (2) + personal VTE history (3).

    Outcome

    The calculator returns a total of 9 and classifies the result as Highest risk (9), with the model-based interpretation.

    2. Middle-aged patient having minor surgery

    Clinical learner

    Background

    A healthy 50-year-old patient has a BMI above 25 and is scheduled for minor surgery lasting less than 45 minutes.

    Problem

    See how three one-point factors combine in the Caprini model.

    How to use

    Select Age 41–60 years, BMI > 25, and Minor surgery (< 45 min).

    Selected points: age 41–60 (1) + BMI > 25 (1) + minor surgery (1).

    Outcome

    The calculator returns a total of 3 and classifies the result as Low to moderate risk (3).

    FAQ

    What does the Caprini Score measure?

    It stratifies venous thromboembolism risk in surgical patients using the 2005 Caprini Risk Assessment Model.

    How are Caprini points assigned?

    Risk factors contribute 1, 2, 3, or 5 points, depending on their weight in the model.

    What does a score of 0 mean?

    A score of 0 is classified as the lowest risk category in this calculator.

    What information does the result include?

    The result includes the total score, point subtotals, risk category, interpretation, and the Caprini RAM 2005 method.

    Is this calculator medical advice?

    No. It is an informational calculator and does not replace assessment or treatment decisions by a qualified clinician.

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