Nursing care
Gastrostomy Tube Care: the nurse's role, start to finish
Written and reviewed by Dana Whitfield, RN, MSN · 6 min read · Updated September 2026
Short answer
Gastrostomy tube care nursing means confirming placement and checking residual before every feed, flushing the tube before and after feeds and medications, and assessing the insertion site for leakage, redness, or breakdown every shift. Skipping any one of these steps is how aspiration, tube occlusion, and skin injury get missed.
When it is done and why
A gastrostomy tube, placed surgically, endoscopically as a PEG, or radiologically, provides long-term enteral access when a patient cannot meet nutritional needs orally: dysphagia after stroke, head and neck cancer, prolonged intubation, or progressive neurological disease such as ALS. It is chosen over nasogastric feeding when the need is expected to last beyond four to six weeks, since a gastrostomy avoids the nasal and oesophageal irritation of long-term NG placement.
The nurse's role starts well before the tube exists, in recognising the patient who is failing oral intake and advocating for a swallow evaluation, and continues for as long as the tube is in place, often months or years. Understanding the underlying reason for the tube shapes the whole care plan, since a stroke patient working toward oral intake again is managed differently from a patient with a terminal diagnosis for whom the tube is comfort-focused.
Preparing the patient
Before initiating or resuming feeds, elevate the head of the bed to at least 30 to 45 degrees and keep it there during the feed and for 30 to 60 minutes afterwards, since this single position change is the most effective intervention against aspiration. Explain to the patient and family what the feeding schedule will look like, bolus, intermittent, or continuous, and why the tube exists if this is a new placement.
For a fresh PEG, expect the site to be tender and possibly to ooze small amounts of serosanguinous drainage for the first few days; this settles as the tract matures over one to two weeks. Assess the patient's baseline skin integrity around the stoma, nutritional status, and any coagulation issues that would affect healing, and confirm with the surgical or GI team when feeds may safely begin, since most protocols start feeding within hours of placement rather than waiting days.
The steps that matter for safety
Three checks happen at every feed without exception: confirm placement, check residual, and flush before and after. Confirm placement by checking the external length marking against what was documented at insertion, checking for a stable, non-tender site, and following facility protocol for pH testing of aspirate where used; a tube that has migrated inward or outward changes both delivery and aspiration risk.
Check gastric residual volume before bolus or intermittent feeds. A high residual, generally above the threshold set in unit protocol, is a signal to hold the feed and reassess rather than push forward on schedule. Flush the tube with 30 mL of water before and after each feed and before and after each medication, and flush between medications if giving more than one, because unflushed tubes clog with formula or crushed medication residue and an occluded tube is often only fixable by replacement.
During the procedure — the nurse's role
During a bolus or intermittent feed, stay with or check on the patient rather than starting the feed and leaving, watching for coughing, gagging, or regurgitation that signals the feed is not tolerated. Administer the feed at the rate ordered, since running formula in too fast increases the risk of vomiting, cramping, and dumping syndrome.
For continuous feeds via pump, verify the rate matches the order at the start of the shift and after any interruption, and check the external tubing and connections for kinks or disconnection. Never add medications directly to a hanging feed bag; give them separately through the tube with flushes on either side, since formula and many medications interact and clog the line.
After: monitoring and complications
Assess the stoma site every shift for leakage of gastric contents, redness, warmth, swelling, or purulent drainage, all of which suggest peristomal infection or skin breakdown from gastric acid exposure. A small amount of clear to serosanguinous drainage is normal in a new tube; frank pus, a fever, or spreading erythema is not and needs prompt reporting.
Watch for buried bumper syndrome, where the internal retention disc migrates into the gastric or abdominal wall tissue and causes pain, difficulty flushing, and resistance to rotating the tube; this is a surgical concern, not something to push through. Also monitor for signs of aspiration pneumonia, diarrhoea or constipation related to formula tolerance, and dislodgement, which in a mature tract needs a replacement tube placed within hours to prevent the stoma closing.
Documentation and teaching
Document external tube length at every shift, residual volumes and what was done with them, site assessment findings, feed type and rate given, and flush volumes and timing. Consistent external length documentation is what lets the next nurse detect migration early, so do not skip it because the site looks fine.
Teach the patient and caregiver to rotate the external bumper daily to prevent skin adherence, to clean the site with mild soap and water rather than harsh antiseptics, and to keep the site dry between cleanings. Cover what to do if the tube falls out, cover the stoma and seek care urgently since a mature tract can begin closing within hours, and give clear signs to report: fever, increasing pain, site drainage that changes in colour or amount, or the tube not flushing.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our gastrointestinal practice questions are the closest set to what this page covers.
Common questions
What do you do if a gastrostomy tube falls out?
Cover the stoma with a clean dressing to protect it and seek medical attention urgently, since a mature tract can start to close within hours. If a replacement tube or a Foley catheter is available and the nurse is trained and authorised to do so per facility policy, temporary insertion may be indicated to keep the tract open until definitive replacement.
How much residual volume means you should hold a gastrostomy feed?
There is no single universal cutoff; it is set by facility or unit protocol and often considered alongside the patient's clinical picture rather than the number alone. A residual well above what was last instilled, or one accompanied by distension, nausea, or discomfort, is a reason to hold the feed and reassess rather than proceed on schedule.
Can you crush all medications for a gastrostomy tube?
No. Enteric-coated and extended-release medications cannot be crushed without changing how the drug is absorbed, and some formulations are contraindicated for tube administration altogether. Check each medication against a drug reference or pharmacy before crushing, and flush between each one to prevent interactions and clogging.
What does leakage around a PEG site indicate?
Ongoing leakage of gastric contents around the tube can indicate a stoma that has stretched, an internal bumper sitting too loosely, or early skin breakdown from acid exposure. It needs assessment rather than just more dressings, since persistent leakage left unaddressed leads to significant peristomal skin damage.
Why elevate the head of the bed for gastrostomy feeds?
Elevating the head of the bed to at least 30 to 45 degrees during the feed and for 30 to 60 minutes afterwards reduces the risk of gastric contents refluxing into the airway. This one positioning step is one of the most effective and lowest-cost interventions against aspiration pneumonia in tube-fed patients.