Impact of Comprehensive Rehabilitation Nursing Combined With Refined Airway Management and Nutritional Support on Prognosis and Care Delivery Models in Critically Ill Patients

Inclusion Criteria: * Fulfillment of ICU admission standards with critical illness confirmed by attending physicians or senior specialists * Age ≥ 18 years * Stable vital signs: Systolic blood pressure ≥ 90 mmHg and ≤ 180 mmHg Heart rate ≤ 120 beats/min Oxygen saturation (SpO₂) ≥ 85% under ≤ 60% fraction of inspired oxygen (FiO₂) * Intact or tolerable gastrointestinal (GI) function for enteral nutrition * Informed consent from both patients and families Exclusion Criteria:(1) * Terminal malignancies * Brain death * Irreversible organ failure (e.g., end-stage cirrhosis, advanced heart failure) * Comorbidities potentially confounding study outcomes * Contraindications to interventions (e.g., laryngeal edema, complete intestinal obstruction) * Pregnancy or lactation