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Updated: Jun 6, 2026
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Developing a Clinically Relevant Hemorrhagic Shock Model in Rats
Published on: March 22, 2024
Rabbit model of uncontrolled hemorrhagic shock and hypotensive resuscitation
J B Rezende-Neto1, S B Rizoli, M V Andrade
1Departamento de Cirurgia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil. jbrezende.ufmg@gmail.com
Summary
Developing a new rabbit model for traumatic hemorrhagic shock, this study found that hypotensive resuscitation significantly reduced blood loss and improved outcomes compared to normotensive resuscitation in penetrating trauma scenarios.
Area of Science:
- Trauma and Emergency Medicine
- Surgical Research
- Animal Models in Research
Background:
- Clinically relevant animal models are crucial for studying traumatic hemorrhagic shock.
- Current models may not fully replicate pre-hospital and acute care scenarios of penetrating trauma.
Purpose of the Study:
- To develop and validate a small animal model simulating penetrating traumatic hemorrhagic shock.
- To compare the efficacy of normotensive versus hypotensive resuscitation strategies in this model.
Main Methods:
- A penetrating aortic injury model was created in male New Zealand rabbits.
- Two resuscitation regimens were tested: normotensive and hypotensive (60% baseline MAP).
- Sham-operated animals served as controls; experiments simulated pre-hospital and emergency room care.
Main Results:
- Hypotensive resuscitation significantly reduced intra-abdominal blood loss (8.0 ± 1.5 mL/kg) compared to normotensive resuscitation (17.1 ± 2.0 mL/kg).
- Normotensive resuscitation led to decreased antithrombin levels and evidence of re-bleeding.
- The model successfully simulated penetrating trauma and hemorrhagic shock with current resuscitation strategies.
Conclusions:
- Hypotensive resuscitation is a more effective strategy for managing penetrating traumatic hemorrhagic shock in this novel small animal model.
- This model provides a valuable platform for further research into hemorrhagic shock and resuscitation techniques.
