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O&G TopicsPerioperative care

O&G · Perioperative care

Perioperative venous thromboembolism prophylaxis

Also known as VTE prophylaxis · DVT prevention · thromboprophylaxis · perioperative anticoagulation

FRANZCOG fellowship guide to perioperative VTE prevention: ACOG 2021 gynaecological surgery bulletin, ACCP mechanical and pharmacological rungs, ENOXACAN II enoxaparin 40 mg SC daily with 12.0 versus 4.8 percent VTE at four weeks after abdominal or pelvic cancer surgery, HIGHLOW neuraxial intervals, and obstetric guideline disagreement after caesarean.

high13 referencesUpdated 3 Sept 20268 min readSource-verified · Sept 2026

Checked against its sources on 3 Sept 2026

Your progress

Saved on this device.

Target exams

FRANZCOGMRCOGABOGFRCSCMRCPI

Red flags

  • Sudden dyspnoea, pleuritic pain, syncope or unexplained tachycardia needs a PE pathway, not another prophylactic dose
  • Uncontrolled bleeding overrides pharmacological prophylaxis; use mechanical measures and reassess
  • LMWH around neuraxial procedures requires an anaesthetic timing plan to prevent spinal haematoma
  • Extended prophylaxis fails if the discharge prescription, injection teaching or stop date is omitted
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Your progress

Saved on this device.

Target exams

FRANZCOGMRCOGABOGFRCSCMRCPI

Red flags

  • Sudden dyspnoea, pleuritic pain, syncope or unexplained tachycardia needs a PE pathway, not another prophylactic dose
  • Uncontrolled bleeding overrides pharmacological prophylaxis; use mechanical measures and reassess
  • LMWH around neuraxial procedures requires an anaesthetic timing plan to prevent spinal haematoma
  • Extended prophylaxis fails if the discharge prescription, injection teaching or stop date is omitted
One-line fellowship answerRisk-assess the patient and the procedure, then balance VTE against bleeding: early mobilisation for everyone, correctly fitted IPC, and pharmacological prophylaxis with LMWH—enoxaparin 40 mg subcutaneously once daily in ENOXACAN II—or unfractionated heparin 5,000 units twice or three times daily; after major abdominal or pelvic cancer surgery continue LMWH for four weeks (ENOXACAN II 12.0 versus 4.8 percent VTE) unless bleeding risk prevents it.[2][3][9][12]

The benign laparoscopy and the open ovarian-cancer cytoreduction are both “gynaecological surgery,” but they do not carry the same thrombotic risk. The safe registrar names procedure risk, patient risk, bleeding risk, method, timing and duration—then reassesses all six after surgery.[1][4]

Definition and classification

Venous thromboembolism (VTE) combines deep-vein thrombosis (DVT) and pulmonary embolism (PE). Perioperative thromboprophylaxis reduces risk with mobilisation, mechanical compression and/or anticoagulants before a clot forms. Treatment-dose anticoagulation for suspected or proven VTE is a different pathway.[1][4]

        Mechanical methods include intermittent pneumatic compression (IPC) and, in selected protocols, graduated compression stockings. Pharmacological options are low-molecular-weight heparin (LMWH) or unfractionated heparin (UFH). Aspirin is not routine first-line prophylaxis for major gynaecological cancer surgery.[1][4][5]

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        References13ShowHide
        1. [1]American College of Obstetricians and Gynecologists’ Committee on Practice Bulletins—Gynecology Prevention of Venous Thromboembolism in Gynecologic Surgery: ACOG Practice Bulletin, Number 232 Obstet Gynecol, 2021.PMID 34259490
        2. [2]Bergqvist D, Agnelli G, Cohen AT, et al. Duration of prophylaxis against venous thromboembolism with enoxaparin after surgery for cancer N Engl J Med, 2002.PMID 11919306
        3. [3]Lyman GH, Bohlke K, Khorana AA, et al. Venous thromboembolism prophylaxis and treatment in patients with cancer: american society of clinical oncology clinical practice guideline update 2014 J Clin Oncol, 2015.PMID 25605844
        4. [4]Geerts WH, Bergqvist D, Pineo GF, et al. Prevention of venous thromboembolism: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines (8th Edition) Chest, 2008.PMID 18574271
        5. [5]Kuderer NM, Lyman GH Guidelines for treatment and prevention of venous thromboembolism among patients with cancer Thromb Res, 2014.PMID 24862132
        6. [6]Cain K, Schmeler KM, Langley G, et al. Patient cost associated with filling a prescription for extended-duration venous thromboembolism (VTE) prophylaxis following surgery for gynecologic cancer Gynecol Oncol, 2012.PMID 22813886
        7. [7]Vázquez FJ, Bilbao MS, Saimovici J, et al. Improving adherence rate of extended prophylaxis for venous thromboembolic disease after abdominal and pelvic oncologic surgery: a pilot educational study Clin Appl Thromb Hemost, 2015.PMID 25908111
        8. [8]Palmerola KL, D'Alton ME, Brock CO, Friedman AM A comparison of recommendations for pharmacologic thromboembolism prophylaxis after caesarean delivery from three major guidelines BJOG, 2016.PMID 26435300
        9. [9]Geerts WH, Pineo GF, Heit JA, et al. Prevention of venous thromboembolism: the Seventh ACCP Conference on Antithrombotic and Thrombolytic Therapy Chest, 2004.PMID 15383478
        10. [10]Gomez D, Orfanelli T, Awomolo A, et al. A comparison of pregnancy-specific risk scoring systems for venous thromboembolic pharmacoprophylaxis in hospitalized maternity patients J Matern Fetal Neonatal Med, 2022.PMID 33043758
        11. [11]Friedman AM, D'Alton ME Leveraging resources for obstetric venous thromboembolism prevention in a state safety collaborative Semin Perinatol, 2019.PMID 30935754
        12. [12]Gould MK, Garcia DA, Wren SM, et al. Prevention of VTE in nonorthopedic surgical patients: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines Chest, 2012.PMID 22315263
        13. [13]Bistervels IM, Wiegers HMG, Áinle FN, et al. Onset of labor and use of analgesia in women using thromboprophylaxis with 2 doses of low-molecular-weight heparin: insights from the Highlow study J Thromb Haemost, 2023.PMID 36695396
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