Which of the following are recommendations for measuring GRVs?

• A. Use a large bore feeding tube; Use a 60 mL syringe; Check GRVs the first 2 days of feeding
• B. Use a small bore feeding tube; Use a 5 mL syringe; Check GRVs weekly
• C. Do not measure GRV; Do not check for first 3 days; Use a 100 mL syringe
• D. Check GRV only after day 3; Use a large bore feeding tube; Use a 10 mL syringe

Answer: (A)

Measuring gastric residual volumes helps you assess tolerance to enteral feeding and catch delayed gastric emptying early, so feeds can be adjusted promptly for safety and effectiveness. To get a meaningful measurement, the aspiration technique matters. A large-bore tube is easier to aspirate from and less prone to occlusion, which means the residual you withdraw is more representative of what’s in the stomach. Using a 60 mL syringe provides enough suction to pull out the residual volume reliably without needing excessive force. Checking GRVs in the first two days of feeding targets the period when intolerance often emerges and allows timely adjustments to the feeding plan.

opting for a small-bore tube or a very small syringe can hinder accurate aspiration; you may underestimate GRVs or struggle to obtain any reading at all. Delaying GRV checks or omitting them misses early signs of intolerance and increases risk of complications. Therefore, the recommended approach is to use a large-bore tube with a 60 mL syringe and assess GRV during the initial two days of feeding.