A GI tube (gastrointestinal tube) is a flexible medical tube placed into the stomach or small intestine to deliver nutrition, fluids, or medication when someone can’t eat or swallow normally. It can also be used to drain the stomach when the digestive system needs rest. GI tubes range from temporary options threaded through the nose to long-term tubes placed directly through the skin into the stomach or intestine.
Types of GI Tubes
GI tubes fall into two broad categories based on where they end up: the stomach or the jejunum (the upper part of the small intestine). Within those categories, the main difference is how the tube gets there.
Tubes that reach the stomach include:
- Nasogastric (NG) tubes: thin tubes inserted through the nose, down the throat, and into the stomach. These are the most common short-term option and can be placed at the bedside without surgery.
- Orogastric (OG) tubes: similar to NG tubes but inserted through the mouth instead of the nose, often used in infants or during surgery.
- PEG tubes (percutaneous endoscopic gastrostomy): placed directly through the abdominal wall into the stomach using a camera-guided procedure. These are the standard choice for long-term feeding.
- RIG tubes (radiologically inserted gastrostomy): also placed through the abdominal wall, but guided by X-ray imaging rather than a camera.
Tubes that reach the jejunum are used when food needs to bypass the stomach entirely, often because of severe reflux, delayed stomach emptying, or after certain surgeries. These include nasojejunal tubes (through the nose), jejunostomy tubes (surgically placed through the abdomen), and PEG-J tubes (which pass through the stomach and extend into the small intestine).
Why Someone Might Need a GI Tube
The core reason is straightforward: the person isn’t getting adequate nutrition by mouth. This can happen because of difficulty chewing or swallowing (called dysphagia), a narrowed esophagus, head and neck cancers, or a serious injury affecting the mouth or throat. Neurological conditions like stroke, advanced dementia, or ALS can gradually make eating unsafe because food or liquid enters the airway instead of the stomach.
GI tubes are also used for people with digestive conditions that prevent normal nutrient absorption, such as severe Crohn’s disease. Children with certain developmental or metabolic conditions may rely on tube feeding for years. And severe eating disorders sometimes require temporary tube feeding to stabilize nutrition when oral intake is dangerously low.
Beyond feeding, NG tubes serve a completely different purpose: decompression. When the intestines are blocked (bowel obstruction) or have temporarily stopped moving after surgery (ileus), fluid and gas build up in the stomach. An NG tube connected to gentle suction drains that buildup, relieving nausea and vomiting and preventing fluid from being inhaled into the lungs.
How a PEG Tube Is Placed
Since PEG tubes are the most common long-term GI tube, knowing what the procedure involves can ease a lot of anxiety. It’s not a major surgery. You’ll need to fast for at least four hours beforehand, and you’ll receive sedation so you’re relaxed but not fully under general anesthesia in most cases.
A doctor passes a thin, flexible camera down through your mouth and into your stomach. The camera’s light shines through the abdominal wall from the inside, showing the doctor exactly where to make a small skin incision, typically less than a centimeter wide. A guide wire is threaded through that opening and into the stomach, then pulled up and out through the mouth. The feeding tube is attached to the wire and pulled back down through the mouth, through the stomach, and out through the abdominal wall, where it’s secured with an internal bumper on the inside and a disc against the skin on the outside.
The whole procedure usually takes about 20 to 30 minutes. Most people can start using the tube for feeding within a day or two.
Risks and Complications
GI tube placement is generally safe, but complications do occur. A large study in the Journal of Vascular and Interventional Radiology found an overall 30-day complication rate of 12.3% for tubes placed through the abdominal wall. The vast majority of these (10.7%) were minor, things like skin irritation around the tube site, minor leaking, or temporary pain. Major complications occurred in 1.6% of cases, and the procedure-related mortality rate was 0.7%, with deaths linked to abdominal infection.
The most common day-to-day issues people experience are tube clogging (usually from medications or thick formula), skin irritation or redness around the stoma (the opening in the skin), and the tube accidentally being pulled or falling out. Granulation tissue, a small area of bumpy, pink tissue that forms around the stoma, is common and usually manageable with topical treatment.
How Long GI Tubes Last
NG tubes are temporary by design. They’re typically used for days to a few weeks and then removed. Tubes placed through the abdominal wall are meant for longer use, but they don’t last forever.
The material matters. Research comparing the two main tube materials found that polyurethane PEG tubes lasted an average of about 574 days (roughly 19 months), while silicone tubes lasted about 287 days (roughly 9.5 months). Silicone tubes deteriorated significantly faster. When a tube wears out or becomes damaged, replacing it is usually a quick office procedure once the original tract has matured, which takes about 8 to 12 weeks after initial placement.
Daily Care and Maintenance
Keeping a GI tube working well comes down to a few consistent habits. The most important is flushing with water to prevent clogs. Standard practice is to flush with about 120 milliliters (roughly half a cup) of water before and after each feeding. If medications are given through the tube, additional flushes of 30 to 50 milliliters before and after each medication help keep the line clear. These water flushes also contribute to daily hydration, which matters since tube-fed patients don’t get the fluid they’d normally take in by drinking.
The skin around the tube site needs daily cleaning with mild soap and water. You’ll want to check for redness, swelling, drainage, or any changes in how the tube sits. The external disc or bumper should be snug against the skin but not pressing so tightly that it causes irritation or buries into the tissue.
Living With a GI Tube
One of the most common concerns is how much a GI tube limits normal activity. The restrictions are real but mostly temporary. For the first two weeks after placement, baths should be kept to sponge baths or shallow water that doesn’t submerge the site. After two weeks, full baths and swimming in chlorinated pools are typically fine as long as the site has healed well. Swimming in lakes or the ocean requires a longer wait, about two months, because of the higher risk of infection from natural water.
Strenuous physical activity and contact sports are off limits for about a month after placement. Gentler exercise and physical therapy can usually resume after two weeks, though core-intensive movements and lying on the stomach should be avoided until then. Once fully healed, most people return to their regular activities. Many adults and children with long-term feeding tubes go to work, attend school, play sports, and travel.
Feeding itself can be done in different ways depending on the person’s needs. Bolus feeding delivers a set amount of formula several times a day through a syringe, mimicking regular mealtimes. Continuous feeding uses a pump to deliver formula slowly over many hours, often overnight. Some people use a combination of both. The flexibility means tube feeding can be adapted around daily routines rather than the other way around.