Fluid overload in children undergoing mechanical ventilation

Area of Science:

• Critical Care Medicine
• Nephrology
• Pediatric Critical Care

Background:

• Intensive care unit (ICU) patients often experience fluid overload due to aggressive fluid resuscitation for septic shock and other fluid sources.
• Liberal fluid administration is linked to increased morbidity and mortality, particularly in pediatric populations.

Purpose of the Study:

• To review the pathophysiology of fluid overload in critically ill patients.
• To discuss the consequences of fluid overload, including endothelial glycocalyx damage and interstitial edema.
• To explore current and proposed therapeutic strategies for managing fluid overload.

Main Methods:

• This article presents a non-systematic review of existing literature.
• It discusses the pathophysiology, consequences, and therapeutic options for fluid overload.
• Focuses on strategies relevant to intensive care unit settings.

Main Results:

• Systemic inflammatory response syndrome damages the endothelial glycocalyx, leading to fluid extravasation and edema.
• Fluid extravasation increases the need for mechanical ventilation, renal replacement therapy, and prolongs ICU and hospital stays.
• Cautious fluid management and hemodynamic monitoring are crucial for minimizing damage.

Conclusions:

• Early use of vasopressors (e.g., norepinephrine) can improve cardiac output and renal perfusion.
• Combination therapy with diuretics and aminophylline can effectively induce diuresis.
• Sedation and early mobilization protocols are key strategies to reduce ICU morbidity and mortality.