Related Experiment Video
Updated: Aug 6, 2025

Microfluidics in Assessing Platelet Function
Published on: November 8, 2024
Prehospital tranexamic acid for trauma victims.
1Centre for Trauma Sciences, Blizard Institute, Queen Mary University of London, 4 Newark Street, London, E1 2AT, UK. koomori@juntendo.ac.jp.
Paramedics in the UK can now administer tranexamic acid (TXA) intramuscularly to trauma patients. This paper reviews evidence for pre-hospital TXA use, including the intramuscular route, for traumatic bleeding.
Area of Science:
- Emergency Medicine
- Trauma Care
- Pharmacology
Background:
- A public inquiry highlighted the need for rapid tranexamic acid administration in trauma.
- UK paramedics are authorized for pre-hospital intramuscular tranexamic acid, but Japan lags despite the drug's origin.
- Instances of pre-hospital death from traumatic bleeding in Japan underscore the need for improved emergency care.
Purpose of the Study:
- To summarize the current evidence on tranexamic acid use in patients with traumatic bleeding.
- To specifically review new evidence supporting the intramuscular route of tranexamic acid administration.
- To inform the discussion on authorizing pre-hospital tranexamic acid administration in Japan.
Main Methods:
- Review of existing studies and clinical trials on tranexamic acid in trauma.
- Inclusion of recent evidence focusing on the intramuscular administration route.
- Synthesis of data relevant to pre-hospital settings.
Main Results:
- Evidence supports the timely administration of tranexamic acid to reduce mortality in trauma.
- The intramuscular route offers a viable alternative for pre-hospital administration.
- UK's authorization of paramedics using intramuscular tranexamic acid serves as a potential model.
Conclusions:
- Pre-hospital tranexamic acid, particularly via the intramuscular route, is crucial for managing traumatic bleeding.
- Further consideration is needed for authorizing emergency life-saving technicians in Japan to administer tranexamic acid.
- Implementing pre-hospital tranexamic acid can improve outcomes for critically injured patients.
Related Concept Videos
Anticoagulant Drugs: Low-Molecular-Weight Heparins
Introduction to Hemostasis
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized,...
Venous Thrombosis III: Interprofessional Care
Cardiopulmonary Resuscitation IV: Pharmacological Management
Extrinsic and Intrinsic Pathways of Hemostasis
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...
Acute Coronary Syndrome IV: Interprofessional Care

