[Association between glucose variability and poor prognosis in critically ill patients]

Area of Science:

• Critical Care Medicine
• Endocrinology
• Metabolic Disorders

Background:

• Glycemic control is vital in intensive care units (ICUs).
• Glucose variability, beyond average glucose levels, may impact patient outcomes.
• The prognostic significance of glucose fluctuations in critically ill patients requires further elucidation.

Purpose of the Study:

• To investigate the association between glucose variability and prognosis in critically ill patients.
• To determine if glucose variability predicts mortality and other adverse outcomes.

Main Methods:

• Prospective study in a 24-bed ICU involving 145 patients.
• Arterial blood glucose measured four times daily; coefficient of variation (CV) calculated.
• Outcomes including mortality, renal replacement therapy, mechanical ventilation, and ICU-free days were recorded.

Main Results:

• Nonsurvival group exhibited higher CV, increased incidence of moderate/severe hypoglycemia, and longer durations of renal replacement therapy.
• Higher CV was observed in surviving non-diabetic patients, but not in diabetic patients.
• Increased glucose variability correlated with poorer prognosis, including shorter mechanical ventilation and ICU-free time.

Conclusions:

• Critically ill patients, especially non-diabetics, demonstrate significant glucose variability (higher CV).
• Elevated glucose variability is associated with a worse prognosis and increased risk of hypoglycemia.
• Frequent blood glucose monitoring is essential for detecting clinical changes and guiding treatment adjustments.