End organ perfusion and pediatric microcirculation assessment

Area of Science:

• Anesthesiology
• Pediatric Critical Care
• Hemodynamics

Background:

• Cardiovascular instability and hypoxemia are common perioperative risks in neonates and infants.
• Current methods for assessing end-organ perfusion rely on macrocirculatory parameters.
• Microcirculation assessment is emerging as a key factor in optimizing hemodynamic management.

Purpose of the Study:

• To review current modalities for assessing end-organ perfusion in neonates and infants during the perioperative period.
• To explore the role of microcirculation assessment in improving hemodynamic management.
• To discuss the physiological basis, pathophysiology, and detection techniques for microcirculatory alterations.

Main Methods:

• Review of current literature on perioperative hemodynamic monitoring in neonates and infants.
• Discussion of macrocirculatory parameters (vital signs, urinary output, blood gases) and their limitations.
• Exploration of advanced microcirculation assessment techniques, including handheld vital microscopy (HVM), incident dark field (IDF), and sidestream dark field (SDF) imaging.

Main Results:

• Adequate tissue oxygenation is typically assessed using macrocirculatory parameters and blood markers.
• Microcirculation assessment, termed 'hemodynamic coherence,' shows promise for evaluating tissue perfusion.
• Technological advancements have improved the ability to measure microcirculatory function, moving beyond limited scope methods.

Conclusions:

• Microcirculation assessment is a vital area for improving hemodynamic management in critically ill pediatric patients.
• Handheld vital microscopy and related technologies offer enhanced capabilities for evaluating microcirculatory function.
• Further research is needed to fully understand and utilize microcirculatory assessment in clinical practice, especially in septic shock.