Final answer:
The most effective intervention to prevent aspiration in patients receiving enteral feedings is to use a small-bore duodenal feeding tube, which reduces the risk of regurgitation and aspiration.
Step-by-step explanation:
In the prevention of aspiration during enteral feedings, the most effective intervention mentioned in the options provided is B. Use a small-bore duodenal feeding tube. This technique involves placing a tube into the small intestine, rather than the stomach, reducing the risk of regurgitation and aspiration. Option A, checking for gastric residuals, helps to monitor for potential overfeeding or delayed gastric emptying but is not directly preventative for aspiration. Option C, using a high-fat feeding, is not associated with reducing aspiration risk and could potentially slow gastric emptying. Lastly, option D, adding blue food coloring to the enteral feeding, does not prevent aspiration; it is merely a method to identify aspirated material.