Dynamic neuroendocrine changes in critically ill patients with polytrauma

Area of Science:

• Endocrinology
• Trauma Medicine
• Critical Care

Background:

• Acute polytrauma triggers neuroendocrine system activation.
• Nonthyroidal illness syndrome (NTIS) is linked to poor outcomes in intensive care unit (ICU) patients.

Purpose of the Study:

• To assess dynamic changes in neuroendocrine hormones in polytrauma patients.
• To investigate the association between these hormonal changes and the polytrauma score (PTS).

Main Methods:

• Collected blood samples from 24 polytrauma patients on days 1, 2, 3, and 7 post-ICU admission.
• Analyzed levels of TSH, T3, fT3, T4, fT4, GH, PRL, and procalcitonin.

Main Results:

• Initially, patients showed normal TSH, T4, fT4, but low T3 and fT3 levels.
• By day 7, TSH tended to increase (p=0.07) and fT4 significantly decreased (p=0.03).
• Prolactin (PRL) levels increased significantly on day 3 (p=0.04).
• PTS positively correlated with fT3 (r=0.582, p=0.004) and negatively with fT4 (r=-0.422, p=0.04) on day 1.

Conclusions:

• Critical illness in polytrauma patients causes trauma severity-dependent alterations in thyroid axis response.
• Dynamic hormonal monitoring is more informative than single measurements.
• Further research is needed before considering supplemental therapy for NTIS.