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[Initial shock from burns. Physiopathology: therapeutic principles].
1Service des brûlés, CHU de Bordeaux, place Amélie Raba-Léon, 33076 Bordeaux, France. raymond.sanchez@chu-bordeaux.fr
Pathologie-Biologie
|April 6, 2002
Summary
Severe burns cause skin barrier loss and inflammation, leading to hypovolemic shock. Early vascular filling is crucial, but hyperkinetic shock can occur later, requiring hemodynamic monitoring and potential pressor amine use.
Area of Science:
- Burn injury pathophysiology
- Inflammatory mediator release
- Hemodynamic alterations
Context:
- Widespread skin destruction triggers significant inflammatory responses.
- Release of numerous mediators (e.g., endothelin, histamine, cytokines) occurs at burn sites and systemically.
- Abnormalities in capillary walls and interstitial spaces lead to fluid shifts.
Purpose:
- To describe the pathophysiological cascade following severe burns.
- To highlight the risks of hypovolemic and hyperkinetic shock.
- To emphasize the importance of hemodynamic monitoring in burn management.
Summary:
- Severe burns disrupt the skin barrier, initiating intense inflammation and mediator release.
- Fluid shifts cause hypovolemia, hemoconcentration, and potential myocardial dysfunction, risking irreversible hypovolemic shock.
- Later, hyperkinetic shock may develop, characterized by tachycardia and decreased systemic vascular resistance, potentially leading to multi-organ failure.
Impact:
- Early recognition and management of hemodynamic changes are critical for survival.
- Rational use of fluid resuscitation, pressor amines, and hemodialysis is guided by hemodynamic profiling.
- Understanding these complex physiological responses is key to improving burn care outcomes.