The most common cause of feeding tube failure is dislodgement, where the tube is accidentally pulled out or shifts from its correct position. In one study of emergency department visits related to feeding tube problems, dislodged tubes accounted for 59% of all complications, followed by blocked (clogged) tubes at 22%. Together, these two problems make up the vast majority of tube failures that send people to the hospital.
Dislodgement: The Leading Cause
A feeding tube can slip out of place during sleep, routine movement, or daily care. For tubes held in place by a small internal balloon, the balloon itself is often the weak link. A study of balloon-type gastrostomy devices found that inner balloon rupture was the reason for removal in 61% of cases, with accidental removal accounting for another 12%. Once the balloon deflates or ruptures, there’s nothing anchoring the tube internally, and it can slide out with little resistance.
The average lifespan of a balloon-type gastrostomy device is about 5 months, though some last as long as 14 months and others fail in as little as two weeks. When the balloon ruptures specifically, tubes tend to last around 6 months before needing replacement. This means if you or someone you care for has a balloon-retained tube, dislodgement from balloon failure is not a question of “if” but “when.”
Clogging and Blockages
Tube occlusion is the second most common failure. Clogs typically happen during medication administration, not during feeding alone. Crushed enteric-coated tablets are a frequent culprit because they tend to clump inside the narrow tubing. Mixing two or more crushed medications together before pushing them through the tube increases the risk further, as drug-to-drug incompatibility can form a paste-like mass.
Formula and medication interactions also cause blockages. When a drug is mixed directly into a feeding formula rather than administered separately, it can trigger a chemical reaction that thickens the mixture enough to obstruct the tube. Even giving formula and certain medications too close together without a water flush in between can create the same problem.
To prevent clogs, flushing with 15 to 30 milliliters of water after every feeding session and after each medication is the standard recommendation. Each medication should ideally be given separately rather than combined, with a small flush between doses.
Tube Material Makes a Difference
Feeding tubes are made from either silicone or polyurethane, and the material significantly affects how long a tube lasts before it degrades. In a study comparing the two, silicone tubes deteriorated much faster, lasting an average of 287 days (roughly 9.5 months) before needing removal. Polyurethane tubes lasted nearly twice as long at 574 days (about 19 months). Tube deterioration requiring removal occurred in 36% of silicone tubes compared to about 16% of polyurethane tubes.
If you’re getting a tube placed for long-term use, polyurethane is generally the more durable option. Silicone tubes are softer and more flexible, which can feel more comfortable, but that flexibility comes at the cost of a shorter functional life.
Leaking Around the Tube Site
Peristomal leakage, where stomach contents seep around the outside of the tube at the skin surface, is one of the most common minor complications. In one case series, complications occurred in 70% of patients, and 88% of those were considered minor, including leakage, wound infection, and tube dislodgement. Leaking often indicates that the tube has loosened in the stoma (the opening in the abdominal wall) or that the stoma tract has widened over time.
Leaking can also be a sign of a more serious problem called buried bumper syndrome, where the internal anchoring disc of the tube migrates into the stomach wall. Symptoms include difficulty pushing formula through the tube, needing more pressure than usual during feedings, persistent leaking, and abdominal pain. If a tube that previously worked fine suddenly becomes hard to use and leaks at the same time, that combination warrants prompt evaluation.
Signs a Tube Is Failing
Some failures happen suddenly, like a balloon rupture or accidental pull. Others develop gradually. Watch for these warning signs:
- Increased resistance during feeding or flushing, which suggests a partial blockage forming inside the tube
- Visible cracking, stiffening, or discoloration of the external portion of the tube, indicating material degradation
- Persistent leaking around the insertion site, especially if the tube appears to sit differently than it used to
- The tube sliding in and out more freely, which may mean the internal balloon is slowly deflating
- Stool appearing around the tube site, which can indicate a fistula (abnormal connection) has formed between the stomach and the colon
Scheduled Replacement
Feeding tubes are not permanent devices. Routine exchange every 6 to 12 months is generally recommended to prevent malfunction, though there are no universal consensus guidelines on exact timing. In practice, balloon-type devices tend to need replacement closer to the 5- to 6-month mark because of balloon degradation, while non-balloon tubes with internal bumpers can often last closer to 12 months or longer depending on the material.
Replacement of an established tube through a mature stoma tract is typically a quick procedure that doesn’t require sedation. The first replacement is usually the one that requires the most caution, since the tract may not be fully healed if done too early. After that, swaps become more routine. Keeping track of when your tube was placed and knowing its expected lifespan helps you plan replacements before an emergency failure forces one.