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Related Experiment Videos

Endotoxic shock model with fluid resuscitation in Macaca mulatta.

Guo Qing Yin1, Hai Bo Qiu, Kai He Du

  • 1The Second Hospital of Nanjing, affiliated with Medical College, Southeast University, 1-1 Zhongfu Road, Nanjing, Jiangsu, 210003, People's Republic of China. yinguoq@jlonline.com

Laboratory Animals
|July 12, 2005
PubMed
Summary

This study developed a macaque model for endotoxic shock and tested resuscitation fluids. Sodium bicarbonate showed improved hemodynamic function compared to normal saline in endotoxic shock models.

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Area of Science:

  • Veterinary Medicine
  • Critical Care Medicine
  • Cardiovascular Physiology

Background:

  • Endotoxemia, often caused by Gram-negative bacteria, leads to sepsis and shock.
  • Early resuscitation is critical in managing endotoxic shock.
  • Evaluating fluid therapies in relevant animal models is essential for clinical practice.

Purpose of the Study:

  • To establish a macaque model for early-phase endotoxic shock.
  • To investigate the resuscitation effects of normal saline, sodium bicarbonate, and hypertonic saline.
  • To assess hemodynamic parameters and myocardial morphology in response to fluid therapy.

Main Methods:

  • Twenty-four macaques were used, with 19 receiving lipopolysaccharide (LPS) to induce endotoxic shock.
  • Animals were randomized into groups receiving normal saline, sodium bicarbonate, or hypertonic saline for resuscitation.

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  • Hemodynamic parameters, blood gases, and myocardial pathology were analyzed.

    • Main Results:

    • LPS administration induced hypotension and reduced left ventricular work index (LVWI).
    • The sodium bicarbonate group exhibited significantly higher mean arterial pressure, cardiac index, systemic vascular resistance index, LVWI, and right ventricular work index compared to the normal saline group.
    • Myocardial pathological changes were observed in all LPS-treated groups.

    Conclusions:

    • Macaques serve as a suitable animal model for studying endotoxic shock.
    • Sodium bicarbonate demonstrated superior hemodynamic resuscitation effects compared to normal saline in this model.
    • Further research into fluid therapies for endotoxic shock is warranted.