This prospective observational study evaluates whether continuing enteral feeding until tracheostomy affects aspiration pneumonia risk and early clinical outcomes in mechanically ventilated intensive care unit patients undergoing elective percutaneous tracheostomy. Patients are managed according to routine ICU practice and are observed in two groups: those who continue enteral feeding until tracheostomy preparation and those who undergo conventional 6-8-hour fasting before the procedure. The primary outcome is the incidence of aspiration pneumonia within 72 hours after tracheostomy. Secondary outcomes include respiratory parameters, arterial blood gas values, procedure-related complications, length of stay, and mortality. The study aims to determine whether routine fasting before tracheostomy provides additional clinical benefit or whether maintaining nutritional continuity may be a safe alternative in critically ill patients.

This prospective observational study was conducted in the intensive care units of Bursa Yüksek İhtisas Training and Research Hospital to evaluate the clinical impact of enteral nutrition management before elective bedside percutaneous tracheostomy in mechanically ventilated patients. In routine clinical practice, enteral feeding is often interrupted for several hours prior to tracheostomy due to concerns about aspiration risk; however, evidence supporting this approach is limited.

In this study, patients were managed according to existing institutional practices and were observed in two groups based on enteral nutrition management strategy: continuation of enteral feeding until tracheostomy preparation or discontinuation of feeding 6-8 hours before the procedure. No randomization or intervention assignment was performed.

The primary objective is to assess the incidence of aspiration pneumonia within the early post-procedural period. Secondary outcomes include respiratory parameters, arterial blood gas measurements, procedure-related complications, length of stay in the intensive care unit and hospital, and mortality.

By comparing these two commonly used approaches, this study aims to determine whether routine pre-procedural fasting provides additional clinical benefit or whether maintaining enteral nutrition until tracheostomy is a safe and feasible alternative in critically ill patients. The findings may contribute to optimizing peri-procedural nutritional strategies and reducing unnecessary interruptions in enteral feeding in intensive care practice.

Inclusion Criteria:

1. Age ≥18 years

2. Mechanically ventilated patients in the intensive care unit

3. Receiving enteral nutrition

4. Scheduled for elective percutaneous tracheostomy

5. No radiologically confirmed active pneumonia at baseline

6. No diagnosis of acute respiratory distress syndrome (ARDS)

7. No ventilator-associated pneumonia at the time of tracheostomy

   • Exclusion Criteria:

1-) Early death after ICU admission 2-) Inability to receive enteral nutrition (e.g., ileostomy, colostomy, severe gastrointestinal pathology) 3-) Clinically significant gastric intolerance (persistent vomiting, abdominal distension, feeding intolerance) 4-) Hemodynamic instability requiring inotropic support 5-) Refusal of participation by patient or legal representative 6-) Pre-procedural enteral nutrition interruption between 1-6 hours 7-) Missing or incomplete clinical data

The study population consists of adult (≥18 years) mechanically ventilated patients admitted to the intensive care units of Bursa Yüksek İhtisas Training and Research Hospital who were scheduled for elective bedside percutaneous tracheostomy. Patients were managed according to routine ICU enteral nutrition practices and included those receiving either continuous enteral feeding until tracheostomy preparation or conventional pre-procedural fasting.

Individual participant data (IPD) will not be shared due to the inclusion of sensitive patient information and institutional data protection policies. Data may be available from the corresponding author upon reasonable request and subject to ethical and institutional approval.