Small-Bore vs. Large-Bore Enteral Tubes: 5 Disadvantages of Narrow Lumens

1. Clogging risk: Viscous formulas, crushed meds, fiber supplements obstruct <8–10 Fr lumens.
2. Slower infusion rates: Gravity/pump flow limited; may not meet caloric goals in time windows.
3. Reflux/aspiration potential: Less gastric sealing; higher gastric residuals reported.
4. Formula restrictions: Requires low-viscosity, polymeric/peptide-based products—limits options.
5. Patency maintenance burden: Frequent flushing, prone to kinking; more nursing time, displacement risk.

Small-bore advantages: nasal comfort, reduced sinusitis, easier placement. Choose based on patient acuity, GI anatomy, and formula needs.