Has the association between gastric residual volume amount and aspiration risk been validated?

• A. No
• B. Yes
• C. Inconclusive
• D. Not studied

Answer: (A)

The idea that the amount of gastric residual volume predicts aspiration risk has not been validated. Research shows that aspiration can occur even with small or normal residuals, and conversely, high residual volumes don’t consistently predict who will aspirate. This lack of reliable association is compounded by variability in how GRV is measured and when it’s checked, making it an inconsistent predictor across patients and settings. Because relying on GRV alone to gauge risk can lead to unnecessary withholding of feeds and undernutrition, clinical practice has moved toward broader tolerance of GRV values and emphasis on other indicators of tolerance and risk reduction (such as head-of-bed elevation, consistent monitoring for signs of intolerance, and using post-pyloric feeding in certain high-risk patients). So, there isn’t validated evidence supporting GRV amount as a dependable predictor of aspiration risk.