Microcirculation and red cell transfusion in patients with sepsis

Area of Science:

• Critical Care Medicine
• Hematology
• Microbiology

Background:

• Sepsis management hinges on early identification, antibiotics, and source control.
• Hemodynamic optimization, including red blood cell (RBC) transfusion, aims to improve oxygen delivery in unstable septic patients.
• Stored RBCs and endogenous factors can negatively impact microcirculation in sepsis.

Purpose of the Study:

• To evaluate the role and potential complications of RBC transfusion in sepsis management.
• To explore the detrimental effects of RBC storage and endogenous factors on microcirculation during sepsis.
• To inform transfusion strategies for septic patients based on current evidence.

Main Methods:

• Review of current sepsis management protocols and transfusion guidelines.
• Analysis of factors affecting RBC function and microcirculation in sepsis.
• Examination of evidence regarding the efficacy of fresh versus stored RBCs in septic patients.

Main Results:

• Early sepsis management includes antibiotics, cultures, and source control.
• RBC transfusion is considered for hypoperfusion but faces challenges due to RBC changes.
• Stored RBCs exhibit altered morphology, membrane properties, deformability, and impaired nitric oxide signaling, negatively affecting microcirculation.

Conclusions:

• A restrictive RBC transfusion strategy (hemoglobin <7 g/dL) is recommended for septic patients due to potential harm from stored RBCs.
• Further research is needed to clarify the optimal use of RBCs in sepsis.
• Optimizing hemodynamics remains crucial, but the benefits of RBC transfusion require careful consideration of RBC quality.