Enteral Feeding on the NCLEX
Head of bed rules, residuals, aspiration prevention, flushes, and meds through the tube.
Enteral feeding questions are aspiration questions in disguise. Position and verification come first every time.
Aspiration prevention
Head of bed at 30 to 45 degrees during feeding and for at least 30 to 60 minutes after an intermittent feeding; continuous feedings keep the head up the whole time. Verify tube placement before each intermittent feeding and med pass (external length, pH per policy; X-ray confirmed the tube initially). Hold the feeding and reassess for vomiting, coughing with feeds, new desaturation, or a change in external tube length. If the head of bed must come down for a procedure, pause the feeding.
Residuals
Check gastric residual volume per facility policy for gastric tubes. Modern guidance has relaxed: a single residual under 500 mL, with no other signs of intolerance, does not by itself justify stopping feeds. Rising residuals plus distention, nausea, or vomiting do. Return aspirated contents unless policy says otherwise; discarding them throws away fluid and electrolytes. Small-bowel tubes are not checked for residuals.
Flushes and formula handling
Flush with 30 mL water before and after each intermittent feeding, before and after each medication, and every 4 hours during continuous feeding. Water is the flush; never force a clogged tube with a stylet. Formula: room temperature, hang no more than 4 to 8 hours for open systems (per product and policy), change the bag and tubing every 24 hours, label with date and time. Cold formula cramps; outdated formula grows bacteria.
Meds via tube
Liquid form when available. Crush only immediate-release tablets, finely, and dissolve in water. Never crush enteric-coated, extended-release, or sublingual medications. Give each drug separately with a small water flush between; mixing them in one slurry clogs tubes and alters absorption. Phenytoin is the classic interaction: hold feeds before and after per policy. Clogged tube prevention is exactly this section done right.
Frequently asked
Residual is 350 mL, patient comfortable?
Under 500 with no intolerance signs: continue feeds per policy, recheck, and monitor. Document the trend.
Why give meds one at a time?
Combined crushed meds form a paste that clogs tubes and can interact. Separate doses with water flushes between.
Patient needs to lie flat for a bedside procedure?
Pause the feeding first. Restarting after is easier than treating aspiration pneumonia.
Quick check
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