Circadian Rhythm in Critical Illness

The goal of this clinical trial is to determine whether intermittent enteral feeding positively influences circadian rhythms in critically ill patients in intensive care units (ICUs). The main research questions are: 1. Does intermittent feeding improve circadian rhythms in ICU patients? 2. How does intermittent feeding affect metabolic markers and recovery outcomes? Researchers will compare intermittent feeding to continuous feeding, the current standard method, to assess its impact on circadian stability and patient health. Participants will: 1. Receive intermittent enteral feeding or continuous enteral feeding for at least 10 days 2. Undergo blood sample collection at three time points daily (morning, afternoon, midnight) to analyze circadian gene expression and metabolic markers 3. Have their clinical condition, nutrition status, and recovery progress monitored throughout the study