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Related Experiment Videos

Tourniquet-induced systemic inflammatory response in extremity surgery.

A Wakai1, J H Wang, D C Winter

  • 1Department of Academic Surgery, Cork University Hospital, Cork, Ireland.

The Journal of Trauma
|November 14, 2001
PubMed
Summary

Tourniquet use during knee arthroscopy causes temporary neutrophil and monocyte activation. This leads to increased neutrophil migration, potentially causing tissue injury from reperfusion.

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Area of Science:

  • Inflammation and Immunology
  • Surgical Research

Background:

  • Tourniquet application can induce systemic inflammatory responses.
  • Investigated biologic response in a clinical tourniquet reperfusion injury model.

Purpose of the Study:

  • To determine if tourniquet-induced reperfusion causes biologic responses in patients.
  • To assess monocyte and neutrophil activation and transendothelial migration (TEM).

Main Methods:

  • Prospective randomized study comparing tourniquet vs. no tourniquet groups during knee arthroscopy.
  • Monitored monocyte/neutrophil activation, TEM, and cytokine levels (TNF-α, IL-1β, IL-10).

Main Results:

  • Neutrophil and monocyte activation significantly increased 15 minutes post-reperfusion.

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  • Ischemia-primed plasma enhanced neutrophil TEM, but not endothelial cell TEM.
  • Elevated tumor necrosis factor-alpha and IL-1beta observed post-reperfusion.

    • Conclusions:

    • Tourniquet-induced ischemia transiently activates neutrophils and monocytes.
    • This activation enhances neutrophil transendothelial migration, indicating potential for tissue injury.