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Printed on 7/19/2026
For informational purposes only. This is not medical advice.
The Caprini score is a commonly used risk assessment model for postoperative venous thromboembolism (VTE). It assigns weighted points to patient risk factors and stratifies risk to inform thromboprophylaxis planning.
Formula: Caprini score = age points + (1 x count of 1-point factors) + (2 x count of 2-point factors) + (3 x count of 3-point factors) + (5 x count of 5-point factors).
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The Caprini score is more complex than Padua or other medical VTE tools because it was designed for the nuanced risk landscape of surgical patients. Systematically assess all four tiers: 1-point factors (awarded for: age 41–60 years, minor surgery planned, prior major surgery <1 month, varicose veins, current swollen legs, obesity [BMI >25], small vessel disease, MI, congestive heart failure, sepsis <1 month, serious lung disease, on oral contraceptives/HRT, history of unexplained stillbirth or 3+ spontaneous abortions, medical patient currently at bed rest, BMI >25); 2-point factors (age 61–74 years, major surgery >45 min, arthroscopic surgery, laparoscopic surgery >45 min, malignancy present or previously, central venous access, confined to bed >72 hours, immobilizing cast <1 month); 3-point factors (age ≥75 years, DVT/PE history, family history of thrombosis, Factor V Leiden, prothrombin 20210A, lupus anticoagulant/anticardiolipin antibody, elevated serum homocysteine, heparin-induced thrombocytopenia, elevated anti-thrombin III); 5-point factors (stroke <1 month, elective major arthroplasty [hip/knee], hip/pelvis/leg fracture <1 month, acute spinal cord injury <1 month, multiple trauma <1 month).
Add the point values for all qualifying risk factors. There is no upper limit — complex patients with multiple high-point factors can easily score 10 or higher. Common Caprini score categories and associated VTE risk: 0 points (very low risk, ~0.5% VTE); 1–2 points (low risk, ~1.5%); 3–4 points (moderate risk, ~3%); 5–6 points (high risk, ~6%); 7–8 points (high risk, ~6–8%); ≥9 points (highest risk, up to 6–8% proximal DVT or PE without prophylaxis). These estimates are from the original Caprini plastic surgery validation dataset and may differ for other surgical specialties.
Translate Caprini score into a prophylaxis recommendation, always balanced against the patient's bleeding risk: Score 0 (very low risk): early ambulation only, no pharmacologic prophylaxis. Score 1–2 (low risk): ambulation + consider mechanical prophylaxis (graduated compression stockings or IPC); pharmacologic prophylaxis optional. Score 3–4 (moderate risk): LMWH or UFH + mechanical prophylaxis (IPC stockings); start within 12–24 hours post-op unless bleeding risk is high. Score ≥5 (high/highest risk): LMWH/UFH + mechanical prophylaxis; consider extended prophylaxis (4 weeks post-discharge) for high-risk abdominal/pelvic cancer surgery and hip/knee arthroplasty. Always initiate mechanical prophylaxis (IPC boots) intraoperatively in virtually all surgical patients regardless of score. Reassess the score at discharge for extended prophylaxis decisions.
General surgeons, colorectal surgeons, hepatobiliary surgeons
Caprini score drives perioperative VTE prophylaxis decisions for the full spectrum of abdominal surgery, from laparoscopic cholecystectomy (typically low Caprini) to open cancer resections (often Caprini ≥7). ACCP guidelines recommend Caprini-based risk stratification for all non-orthopedic surgical patients. High Caprini scores (≥5) in cancer surgery patients justify extended post-discharge pharmacologic prophylaxis with LMWH for 28 days, which reduces VTE by approximately 60% (ENOXACAN II, FAME studies). Review Caprini score in tumor board and pre-operative planning meetings for complex oncologic cases.
Plastic surgeons, aesthetic surgeons, reconstructive surgeons
The Caprini score was originally developed and validated specifically in plastic surgery patients by Dr. Joseph Caprini, and this remains its best-validated context. DVT is a leading cause of mortality after abdominoplasty, body contouring, and major reconstructive surgery. Caprini stratification in plastic surgery is especially critical because many patients are young and healthy in other respects, making systematic scoring (rather than clinical gestalt) essential for identifying high-risk cases. Combine Caprini score with chemoprophylaxis protocol — many centers use a Caprini ≥7 or ≥8 threshold for mandating LMWH prophylaxis after cosmetic/reconstructive procedures.
Orthopedic surgeons, joint replacement surgeons
Hip and knee arthroplasty are assigned 5 points each in the Caprini model, immediately placing most arthroplasty patients in the high or highest risk category. Extended prophylaxis for 28–35 days post-arthroplasty is recommended by ACCP for total hip and total knee replacement. The Caprini score helps individualize this further — patients with Caprini ≥7 or additional thrombophilia risk factors may warrant extended LMWH over aspirin alone, while very low additional risk patients (Caprini 5–6) may be managed with extended aspirin. Coordinate with neuraxial anesthesia anticoagulation timing per ASRA guidelines (12-hour gap for LMWH before and after neuraxial).
Surgeons, pre-operative nurses, perioperative clinicians
Caprini score provides a quantitative foundation for patient counseling about DVT and PE risk before surgery. Patients often underestimate surgical VTE risk — a Caprini ≥7 patient faces a 6–8% risk of symptomatic VTE without prophylaxis. This context motivates patient adherence to compression stockings, early ambulation, and extended LMWH injections post-discharge. Counseling should also address hormonal contraceptive management: patients on combined oral contraceptives or HRT should be counseled to discontinue 4 weeks before major elective surgery.
Oncological surgeons, oncologists, surgical APPs
Patients undergoing abdominal or pelvic surgery for malignancy are at the highest surgical VTE risk — roughly 20–30× greater than the general population. The ACCP Antithrombotic Therapy Guidelines (Gould et al., Chest 2012) and ASCO/SSO guidelines strongly recommend extended prophylaxis (28 days post-operatively) with LMWH for high-Caprini cancer surgery patients. Caprini score ≥5 in cancer surgery patients is the typical threshold for prescribing enoxaparin 40 mg daily for 28 days post-discharge. The ENOXACAN II trial demonstrated a 60% relative reduction in VTE with extended prophylaxis versus in-hospital prophylaxis alone.
The most important distinction in surgical vs. medical VTE prophylaxis is which risk assessment model to use. Caprini was developed and validated in surgical patients and is recommended by ACCP for non-orthopedic surgical VTE risk stratification. The Padua Prediction Score was developed and validated in medical inpatients and should be used for non-surgical patients. Using Caprini in a medical patient or Padua in a surgical patient is methodologically incorrect and may lead to inappropriate prophylaxis decisions. Confirm the clinical context (surgical vs. medical) before choosing the model.
Patients with Caprini ≥5 undergoing abdominal or pelvic cancer surgery should receive extended LMWH prophylaxis for 28 days post-operatively, not just during hospital admission. ACCP Level 1B recommendation (Gould et al., Chest 2012). The ENOXACAN II trial (Bergqvist, NEJM 2002) demonstrated a 60% reduction in VTE with 1-month versus in-hospital-only enoxaparin in colorectal cancer surgery patients. Discuss extended prophylaxis prescriptions pre-operatively so patients are prepared to self-inject or have assistance after discharge.
Intermittent pneumatic compression (IPC) boots should be applied and activated before skin incision and maintained throughout the intraoperative and early post-operative period in virtually all surgical patients, regardless of Caprini score or bleeding risk. IPC reduces VTE by approximately 60% and has no bleeding risk. This is ACCP Grade 1B for intermediate and high-risk patients, and Grade 2C for low-risk patients. The only contraindications to IPC are known or suspected DVT (acute clot in the leg), severe peripheral arterial disease, or recent skin graft over the application area.
Combined oral contraceptives (containing estrogen) and hormone replacement therapy (HRT) increase VTE risk 3–4× and are included as 1-point Caprini risk factors. For major elective surgery with Caprini ≥3, patients should ideally stop combined hormonal contraceptives 4 weeks before surgery (per ACOG and ACCP guidance). Alternative contraception must be provided during this period. Progestin-only contraceptives (mini-pill, Depo-Provera, Mirena IUD) do not significantly increase VTE risk and do not need to be stopped. Document hormone use in the pre-operative assessment.
Pharmacologic VTE prophylaxis must be balanced against bleeding risk. High bleeding-risk scenarios where anticoagulation may be deferred: neurosurgery (intracranial or spinal), ophthalmologic surgery, major joint arthroplasty with neuraxial anesthesia (timing constraints), open prostatectomy, and any surgery in a patient with active bleeding, severe thrombocytopenia, or recent major hemorrhage. In these cases, rely on mechanical prophylaxis (IPC boots) until anticoagulation can be safely initiated. The ACCP recommends mechanical prophylaxis alone when pharmacologic prophylaxis is contraindicated, rather than no prophylaxis.
Thrombophilia testing (Factor V Leiden, prothrombin gene mutation, antiphospholipid antibodies, protein C/S deficiency) is included in the Caprini model as 3-point factors when results are known. However, routine pre-operative thrombophilia workup is NOT recommended just to complete the Caprini score — score only what is already known from the patient's history and prior testing. Ordering thrombophilia panels on all surgical patients is costly, delays surgery, and is not supported by evidence. If a patient has a known personal or family history of VTE, perform targeted thrombophilia testing as part of hematology workup, but not as a routine Caprini scoring prerequisite.
Epidural and spinal anesthesia require specific intervals before and after LMWH dosing to prevent epidural hematoma. Per ASRA (American Society of Regional Anesthesia) 2018 guidelines: LMWH prophylactic dose (enoxaparin 40 mg daily): wait ≥12 hours after last dose before neuraxial placement; resume LMWH ≥12 hours after neuraxial catheter removal. LMWH therapeutic dose: wait ≥24 hours. Violation of these intervals is the primary cause of epidural hematoma — a catastrophic complication with high rates of permanent paraplegia. Coordinate LMWH timing explicitly with the anesthesia team in all patients receiving neuraxial blocks.
High Caprini score in ambulatory surgery patients informs prophylaxis planning but does not automatically mandate hospital admission. Many high-Caprini ambulatory patients can be safely managed with: extended-use sequential compression device (portable home IPC device), enoxaparin prescribed for post-discharge administration, patient education on early ambulation, and telephonic or clinic follow-up at 2 weeks. Outpatient thromboprophylaxis prescribing has been shown to reduce VTE without increasing bleeding in plastic surgery and general surgery outpatient populations. Document the Caprini score in the operative note and ensure outpatient VTE prescriptions are provided before discharge.
The five 5-point Caprini factors represent the highest individual VTE risk scenarios: stroke within 1 month, elective major arthroplasty (hip or knee replacement), hip/pelvis/leg fracture within 1 month, acute spinal cord injury within 1 month, and multiple trauma within 1 month. A single 5-point factor immediately places the patient in the high/highest risk category (Caprini ≥5), mandating LMWH + mechanical prophylaxis. Any patient with one or more of these factors should be flagged for aggressive VTE prophylaxis planning before surgery.
Pre-operative Caprini scoring guides intra-operative and in-hospital prophylaxis. At discharge, reassess the score incorporating any new risk factors that developed during hospitalization: prolonged bed rest (new 2-point factor), post-operative infection/sepsis (new 1-point factor), central venous catheter placement (new 2-point factor), or immobilizing cast (new 2-point factor). Post-operative Caprini recalculation may justify extended prophylaxis in patients who were initially moderate risk pre-operatively. Document both pre-operative and post-operative Caprini scores when prescribing extended prophylaxis.
Caprini score was developed by Caprini et al. (Semin Thromb Hemost 2005) and validated in plastic/general surgery populations. ACCP Antithrombotic Therapy Guidelines (Gould et al., Chest 2012) recommend Caprini-based surgical VTE prophylaxis decision-making. Extended prophylaxis evidence from the ENOXACAN II trial (Bergqvist et al., NEJM 2002) in abdominal cancer surgery. The Rogers score is an alternative validated for general surgery patients (Rogers et al., J Am Coll Surg 2007). The 2018 American Society of Regional Anesthesia (ASRA) guidelines govern anticoagulant-neuraxial timing.
Higher total scores indicate greater postoperative VTE risk and stronger indication for pharmacologic or extended prophylaxis depending on bleeding risk.
Use Caprini scoring in perioperative planning, especially for inpatient and major surgery pathways where VTE prevention protocols are used.
Risk-factor definitions vary across versions and institutions. Use this calculator with local protocols and formal guideline recommendations.
For related assessments, see Wells Score (DVT), RCRI Score and ASA Class.
Disclaimer: This tool is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about your health.
April 21, 2026 · trust-baseline
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