A MIC-KEY tube (often written “mickey tube”) is a low-profile feeding tube that sits flush against the skin of the abdomen, delivering nutrition, fluids, and medication directly into the stomach. Unlike traditional gastrostomy tubes that dangle several inches outside the body, a MIC-KEY button barely protrudes from the surface. It’s one of the most commonly used feeding tubes in children, though adults use them too.
How a MIC-KEY Tube Works
The device has two main parts: a button that sits at skin level and a detachable extension tube that connects when it’s time for a feeding or medication. A small water-filled balloon on the inside of the stomach wall holds the button in place, similar to how a Foley catheter stays in the bladder. When feeding is done, you disconnect the extension tube, and the button sits flat against the abdomen with a cap covering its opening.
This design is what makes it “low-profile.” Standard gastrostomy tubes have a long external tube that hangs from the abdomen at all times, which can catch on clothing, get pulled accidentally, and be visible under shirts. The MIC-KEY button lies discreetly under clothing and is far less bulky, making it a popular choice for active children and adults who want fewer restrictions on movement and daily life.
Who Gets a MIC-KEY Tube
A MIC-KEY tube is typically placed after someone already has an established stoma, which is the small, healed opening in the abdominal wall created during an initial gastrostomy procedure. Most people start with a standard long G-tube first because the stoma needs time to mature and form a stable tract between the skin and stomach. Once that tract is well-healed (usually after several weeks), a surgeon or gastroenterologist can swap the long tube for a MIC-KEY button.
The tube comes in different shaft lengths and diameters to match each person’s body. Getting the right fit matters because a tube that’s too long allows excess movement, which irritates the skin, while one that’s too short puts pressure on the stoma.
Daily Care and Cleaning
Caring for a MIC-KEY tube is straightforward once you learn the routine. Wash the skin around and under the button each day with mild soap and water, and check for any redness, swelling, or drainage that could signal irritation. If you use a gauze dressing around the site, change it daily or whenever it gets wet, since trapped moisture is one of the fastest routes to skin breakdown.
The extension tube needs attention too. After every feeding or medication dose, disconnect it, wash it with warm soapy water, rinse thoroughly, and let it air dry before storing it in a clean spot. Keeping formula residue from building up inside the tubing prevents clogs and bacterial growth.
Balloon Checks and Replacement
The balloon that anchors the tube inside the stomach gradually loses water over time. Check the balloon volume at least once per week by attaching a syringe to the balloon port and withdrawing the water to measure it. If the volume has dropped, refill it to the amount specified for your tube size. Use sterile or distilled water for the balloon. Tap water that has been boiled and cooled also works.
A MIC-KEY tube doesn’t last forever. Most need replacement every three to six months, though the exact timeline varies depending on how the balloon holds up, how acidic the stomach contents are, and whether the tube develops any wear. The replacement itself is relatively quick: deflate the old balloon, slide the button out, and insert a new one into the existing stoma. Many caregivers learn to do this at home, since no surgery is involved once the tract is established.
Common Complications
The most frequent issue is skin irritation around the stoma, usually from stomach contents leaking around the tube. This can happen when the balloon deflates partially or when the tube size no longer fits well. Keeping the site clean and dry, and checking the balloon weekly, helps prevent most leakage problems.
Granulation tissue is another common complication. It looks like small, red, moist bumps forming around the stoma opening. It’s not dangerous, but it can bleed easily and be uncomfortable. Preventing it comes down to keeping the site dry, limiting how much the tube moves, and making sure the tube fits properly. When granulation tissue does develop, it’s typically treated by a healthcare provider applying silver nitrate to shrink the tissue.
Infection around the stoma is less common but worth watching for. Signs include increasing redness that spreads outward, warmth, pus, or a foul smell. Bleeding can also occur, particularly if the tube gets tugged or if granulation tissue is present.
Living With a MIC-KEY Tube
One of the biggest advantages of the MIC-KEY design is how little it interferes with normal activity. Because the button sits at skin level, it works well for crawling babies, active toddlers, and adults who don’t want a visible tube. Most clothing fits over it without issue, and many people can swim and bathe normally once the stoma is fully healed (with the cap securely closed).
Between feedings, there’s nothing hanging from the body to manage. The extension set connects only when needed, which makes the rest of the day feel closer to life without a feeding tube at all. For families adjusting to tube feeding for the first time, the transition from a long external G-tube to a MIC-KEY button often feels like a significant quality-of-life improvement.