Anyone caring for someone on home enteral feeding will hear two device names used almost interchangeably: the PEG tube and the gastrostomy “button” (often referred to by a brand name such as Mic-Key). They do the same basic job – delivering feed and medication directly into the stomach through a surgically created opening, or stoma – but day to day they behave quite differently. Understanding the practical gap between them helps carers ask the right questions when a clinical team raises the possibility of switching.
What Actually Separates a PEG Tube From a Button
A PEG (percutaneous endoscopic gastrostomy) tube is the device usually fitted first. It is a longer tube that protrudes several inches from the abdomen, held in place internally by a soft disc or bumper and externally by a fixation disc against the skin. A gastrostomy button, by contrast, is a short, low-profile device that sits almost flush with the skin. Instead of a permanent length of tubing, it has a small port that a separate extension set clips onto whenever a feed, flush or medication is due, then disconnects afterwards. Internally, a button is usually held in place by a small balloon filled with water rather than a fixed bumper.
That difference in retention method matters in daily care. A PEG’s bumper does not need regular checking. A button’s balloon can slowly lose volume over time and needs periodic verification that it still holds enough water to keep the device seated correctly.
When Clinicians Typically Convert From PEG to Button
A button is not usually the first device fitted. Conversion is generally considered once the stoma tract has had time to form and mature around the original PEG, which commonly takes a few months. The first change to a button is typically carried out in a clinical setting, such as a hospital or clinic, by a nutrition nurse specialist or another suitably trained clinician, rather than at home.
The decision to convert is not automatic and depends on individual circumstances. Considerations clinicians and families weigh up include how active the person is day to day – a flush-fitting button is generally easier to manage under clothing during school, work or exercise than a longer protruding tube – and, in some cases, whether a blended diet is planned, since the diameter of the tube affects what can safely pass through it. This is a decision to raise with the dietitian or nutrition nurse managing the feeding plan rather than something to request unprompted.
Replacement Frequency and Balloon Checks
Buttons are consumable devices with a limited working life. General guidance suggests replacement is typically needed every few months, though the exact interval varies by device, manufacturer and individual wear, and should always follow what the prescribing team specifies rather than a generic timeframe. The first replacement is usually done by a healthcare professional; subsequent changes may be taught to a trained carer or handled by a community nurse, once competency has been signed off.
Balloon volume checks are a routine part of button care. The balloon is filled with sterile or distilled water – never tap water or saline, which can crystallise or be absorbed unpredictably. A syringe is used to withdraw the existing water, measure it against what should be there, and top it back up to the correct volume as specified for that device. If the balloon will not hold water at all, that is a signal the button itself needs replacing rather than simply refilling. Carers should always have a spare button and a compatible syringe on hand, since a balloon that fails unexpectedly needs prompt action to stop the stoma tract starting to close.
Comfort, Discretion and Skin Care
The practical daily-life differences are where families often notice the biggest change after converting. A PEG’s external tube can catch on clothing, seatbelts or during personal care, and is harder to conceal. A button sits close to the skin and, because the extension set disconnects between uses, there is nothing dangling for most of the day – a meaningful difference for anyone self-conscious about visible medical equipment, or for a carer managing an active child or adult.
Skin care around the stoma is important for both devices. Daily cleaning with mild soap and water, thorough rinsing and drying, and avoiding creams or powders on the site are standard practice. Gentle daily rotation of the device is also commonly advised once the initial healing period has passed, to prevent the internal disc or balloon adhering to the stomach lining. Redness, moist pink tissue, or minor bleeding around the stoma (granulation tissue) is a common but manageable issue – not an emergency, but worth flagging to the clinical team rather than treating at home without advice. For buttons specifically, the extension set itself should be changed regularly, and should never be left attached when not actively feeding, since a dangling extension is a common cause of the button being accidentally pulled out.
Which Device Is Right for a Given Situation
Neither device is universally “better” – each suits different points in a feeding journey. A PEG remains the standard starting device while a stoma is establishing. A button becomes an option once the tract is mature and stable, and tends to suit people who are mobile, self-conscious about visible equipment, or managing feeding around school, work or an active routine. Some people remain on a PEG long-term without ever converting, particularly if the tube is functioning well and a switch is not felt to add real benefit.
If a conversion is being discussed, the useful questions to bring to the appointment are practical ones: how often will this specific device need replacing, what balloon volume does it use, who carries out the first change, and at what point does responsibility for balloon checks and replacements pass to a trained carer at home. Getting clear, device-specific answers – rather than general reassurance – is what actually makes the switch to a gastrostomy button go smoothly.