Lactate levels and hemodynamic coherence in acute circulatory failure

Area of Science:

• Critical care medicine
• Hemodynamics
• Microcirculation research

Background:

• Acute circulatory failure presents complex challenges in monitoring and treatment.
• Understanding the interplay between macrohemodynamics, microcirculation, and metabolic markers like lactate is crucial.

Purpose of the Study:

• To review the relationship between macrohemodynamic changes and microcirculatory alterations during acute circulatory failure.
• To evaluate the coherence between macrocirculation, microcirculation, and lactate levels in different clinical contexts.
• To guide resuscitation strategies by integrating systemic hemodynamics, microcirculatory parameters, and lactate monitoring.

Main Methods:

• Review of existing literature on macrohemodynamics, microcirculation, and lactate in circulatory failure models and patients.
• Analysis of coherence between circulatory parameters in experimental models versus clinical settings.
• Discussion of factors influencing these relationships, particularly in septic shock.

Main Results:

• In experimental models, coherence between macrocirculation, microcirculation, and lactate is generally preserved.
• In human patients, especially those with septic shock, this coherence is significantly less clear.
• Numerous factors complicate the interpretation of microcirculatory and lactate changes in critically ill patients.

Conclusions:

• Resuscitation in acute circulatory failure should prioritize adequate tissue perfusion.
• Integrated assessment of systemic hemodynamics, microcirculatory perfusion, and lactate levels is essential.
• Each patient represents a unique case (n=1), requiring tailored treatment based on individual responses.