This randomized clinical trial investigates the comparative efficacy of percutaneous endoscopic gastrostomy (PEG) versus percutaneous endoscopic gastrostomy with jejunal extension (PEGJ) for long-term enteral access. The study addresses a critical knowledge gap in the literature regarding the optimal approach for enteral feeding in patients at risk for aspiration.
Current evidence suggests that aspiration pneumonia occurs in up to 30% of patients following PEG placement, with some studies demonstrating aspiration in up to 38% of patients immediately after enteral feeding administration. This high rate is hypothesized to result from gastric reflux. While PEGJ has been proposed as a potential solution by advancing feeds beyond the pylorus, existing evidence consists primarily of small case series and retrospective studies, with reported aspiration pneumonia rates of approximately 10%. However, the methodological limitations of these studies and contradicting findings create uncertainty about the optimal approach.
A recent meta-analysis of enteral feeding in critically ill patients suggested potential benefits of post-pyloric feeding, but included moderate to low quality evidence and did not directly compare PEG versus PEGJ. Furthermore, some researchers argue that aspiration events may result from oropharyngeal dysphagia rather than gastric reflux, potentially limiting the benefit of jejunal extension.
The study employs a prospective, randomized design with 1:1 allocation using distance randomization via RedCap to ensure allocation concealment. Sample size calculation was based on detecting a 20% difference between groups in aspiration pneumonia rates, with power analysis accounting for a statistical power of 0.8 using chi-square test methodology.
The technical aspects of tube placement follow standardized protocols. For PEG placement, a 20-French pull-type tube is positioned using safe track technique with transillumination and 1:1 finger indentation, placing the tube midway between the greater and lesser curves of the stomach. The PEGJ procedure begins similarly but utilizes a 24-French pull-type PEG followed by advancement of a 12-French jejunal extension tube, which is secured to the small bowel wall with endoclips as indicated.
Both groups will receive continuous feeding rather than bolus feeding to standardize the feeding methodology. The study design accounts for potential confounding factors by excluding patients with conditions that might independently affect aspiration risk or tube function, such as gastroparesis or prior upper gastrointestinal surgery.
The research addresses both clinical efficacy and practical considerations, as PEGJ tubes have reported malfunction rates of up to 50%, potentially requiring additional interventions. This prospective investigation will provide high-quality evidence to guide clinical decision-making, balancing the potential benefits of aspiration reduction against the risks of tube dysfunction and need for reintervention.
Statistical analysis will be conducted by an internal biostatistician using appropriate methodologies for both continuous and categorical variables, with adjustments for non-normal distributions when necessary. The study's 30-day follow-up period was selected based on typical timeframes for post-procedure complications and tube-related adverse events.
