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Updated: May 16, 2026

Prehospital Thrombolysis: A Manual from Berlin
Published on: November 26, 2013
Thromboprophylaxis in nonsurgical patients
Michael B Streiff1, Brandyn D Lau
1Division of Hematology, Department of Medicine and Associate Faculty, Armstrong Institute of Patient Safety and Quality Care, Johns Hopkins University School of Medicine, 1830 E MonumentSt, Ste 7300, Baltimore, MD 21205, USA. mstreif@jhmi.edu
Pharmacologic prophylaxis effectively prevents venous thromboembolism (VTE) in medically ill patients. Low-molecular-weight heparin is preferred over unfractionated heparin due to less bleeding, while new risk tools and extended prophylaxis warrant further study.
Area of Science:
- Internal Medicine
- Hematology
- Critical Care Medicine
Background:
- Venous thromboembolism (VTE) is a significant cause of preventable harm in hospitalized patients.
- Pharmacologic prophylaxis is a key strategy to reduce VTE events.
Purpose of the Study:
- To review the efficacy and safety of pharmacologic VTE prophylaxis in medically ill patients.
- To discuss emerging risk stratification tools and alternative prophylaxis methods.
Main Methods:
- Systematic review of randomized controlled trials comparing pharmacologic prophylaxis versus placebo or other interventions.
- Analysis of comparative effectiveness and safety data for different anticoagulant agents and mechanical devices.
Main Results:
- Pharmacologic prophylaxis significantly reduces deep vein thrombosis and pulmonary embolism.
- Low-molecular-weight heparin (LMWH) shows similar efficacy to unfractionated heparin but with less major bleeding.
- Intermittent pneumatic compression devices are recommended for patients with contraindications to pharmacologic prophylaxis.
Conclusions:
- LMWH is favored for VTE prophylaxis in critically ill patients.
- Novel risk stratification tools and extended-duration prophylaxis require further investigation.
- Improving VTE prophylaxis adherence requires multidisciplinary performance improvement initiatives.
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