Correlation between Arterial Lactate and Central Venous Lactate in Children with Sepsis

Area of Science:

• Pediatric Critical Care Medicine
• Biomedical Monitoring
• Sepsis Pathophysiology

Background:

• Lactate is a key biomarker for assessing tissue perfusion and guiding treatment in sepsis.
• Accurate lactate measurement is crucial for managing pediatric sepsis and septic shock.
• Understanding the agreement between arterial and central venous lactate is important for clinical practice.

Purpose of the Study:

• To determine if significant differences exist between arterial and central venous lactate measurements in pediatric patients diagnosed with sepsis or septic shock.
• To evaluate the correlation between simultaneous arterial and central venous lactate levels.

Main Methods:

• A longitudinal retrospective observational study design was employed.
• Data were collected from 42 pediatric patients (1 month to 17 years) with sepsis/septic shock admitted to the ICU.
• Simultaneous arterial and central venous lactate samples were drawn within 24 hours of admission.

Main Results:

• A strong positive correlation (Spearman's Rho = 0.872, p < 0.001) was observed between arterial and venous lactate levels.
• This correlation remained significant after adjusting for patient age (p < 0.05).
• The correlation was also unaffected by the use of vasoactive drugs (p < 0.05).

Conclusions:

• Arterial and central venous lactate measurements are highly correlated in pediatric patients with sepsis and septic shock.
• This agreement is robust and not influenced by demographic factors or hemodynamic support.
• The findings suggest that either arterial or central venous lactate can be reliably used for monitoring in this patient population.