A gastrostomy is a small opening made through the abdomen into the stomach, allowing a feeding tube to deliver nutrition, fluids, and medications directly to the digestive system. It’s one of the most common procedures for people who can’t eat enough by mouth, whether due to neurological conditions, cancer, or other illnesses that make swallowing difficult or unsafe. When doctors expect someone will need tube feeding for more than 30 days, a gastrostomy is generally preferred over a tube placed through the nose.
Why a Gastrostomy Is Placed
The primary reason is nutrition. When a person can’t swallow safely or can’t take in enough calories orally, a gastrostomy tube (often called a G-tube) provides a reliable way to maintain body weight and prevent malnutrition. Beyond feeding, the tube can also be used to give crushed medications or to decompress the stomach by draining excess air or fluid.
The conditions that lead to a gastrostomy span a wide range. Neurological diseases are among the most common reasons. These include stroke, ALS (motor neuron disease), multiple sclerosis, Parkinson’s disease, cerebral palsy, dementia, and traumatic brain injuries. Head and neck cancers and esophageal cancers frequently require a G-tube as well, either because the tumor blocks swallowing or because radiation treatment temporarily damages the throat. Other conditions include prolonged coma, severe burns, cystic fibrosis, Crohn’s disease, and congenital abnormalities in infants.
Types of Gastrostomy Procedures
There are three main ways to create a gastrostomy, and the choice depends on the patient’s anatomy and overall health.
Percutaneous endoscopic gastrostomy (PEG) is by far the most common. A thin, flexible camera is passed through the mouth into the stomach, and the doctor uses it to guide the tube through a small puncture in the abdominal wall. This approach doesn’t require general anesthesia, which is a significant advantage since many patients needing G-tubes are elderly or medically fragile. PEG has largely replaced surgical methods in everyday practice because it’s simpler, faster, and avoids the risks of a larger operation.
Radiologic gastrostomy uses X-ray or fluoroscopy imaging instead of an endoscope to guide tube placement. This is sometimes chosen for patients with head and neck tumors where passing a camera through the mouth isn’t feasible.
Surgical gastrostomy can be done as an open procedure (through an abdominal incision) or laparoscopically (through a few tiny incisions with a camera). The laparoscopic approach gives the surgeon a better view of the stomach than the open technique but still requires general anesthesia. Surgical gastrostomy is typically reserved for cases where endoscopic or radiologic placement isn’t possible.
What Happens During the Procedure
For a PEG placement, you’ll receive sedation and local anesthesia rather than being fully put under. The actual tube insertion is relatively quick. Surgical gastrostomy takes longer and involves general anesthesia, though the operative portion itself can be quite brief, sometimes around 12 minutes for straightforward cases.
Most people stay in the hospital for one to three days after the tube is placed. A feeding plan is typically established before discharge, with the care team walking you or your family through how to use and maintain the tube at home.
How Feeding Works Through a G-Tube
There are two main approaches to delivering nutrition through a gastrostomy tube, and your care team will recommend one based on medical needs and lifestyle.
Bolus feeding mimics a normal meal pattern. Formula is delivered four to six times a day using a large syringe or gravity bag, with each session providing roughly 250 to 750 mL. This method is considered more natural because it triggers the same digestive hormones your body releases during regular meals, and it promotes better protein and energy delivery. It also allows more freedom of movement between feedings. The downside is that some people experience nausea, diarrhea, or a higher risk of reflux with larger volumes given at once.
Continuous feeding uses an electric pump to deliver formula at a slow, steady rate over many hours. This can reduce nausea and diarrhea in some patients. However, being tethered to a pump limits mobility, and continuous feeding has been linked to higher rates of constipation. Over time, it may also interfere with the body’s normal insulin response.
Daily Tube Care
Keeping the tube and the surrounding skin in good condition prevents most complications. The basics are straightforward but need to become routine.
- Flushing: Push 50 mL of water through the tube twice a day, and always flush after giving formula or medication. This prevents clogs.
- Medications: Crush all pills thoroughly and mix them with water before putting them through the tube. Flush well afterward.
- Site cleaning: Change the dressing around the tube daily, or any time it gets wet or soiled. Clean the skin around the tube with diluted peroxide and saline using a cotton ball or swab to remove crusting or drainage. Keep the area dry until stitches are removed.
- After stitches come out: Gently rotate the tube a full 360 degrees once a day to prevent the skin from growing tightly around it. At this point, you can shower normally and wash the site with soap and water, rinsing well.
How Long a G-Tube Lasts
Gastrostomy tubes don’t last forever and need periodic replacement. How often depends on the type of tube. Balloon-type tubes, which are held in place by a small water-filled balloon inside the stomach, typically last around seven months, with North American guidelines suggesting replacement every three to five months. Larger diameter balloon tubes tend to last somewhat longer than smaller ones.
Non-balloon tubes (sometimes called “bumper” or “peg” style) are more durable, with a median lifespan of about 13 months in one study. A common approach is to place a non-balloon tube initially, then switch to a balloon type after about a year. Balloon tubes are easier to replace since they don’t require an endoscopy, just deflating the balloon and sliding in a new one.
Replacement schedules remain somewhat flexible. Some research suggests that routine, calendar-based exchanges don’t necessarily reduce complications compared to replacing tubes only when problems arise.
Common Stoma Complications
The stoma (the opening in the skin where the tube sits) can develop irritation over time. One of the most frequent issues is granulation tissue, a mound of pink, moist tissue that forms around the tube site. This happens because of moisture from leaking stomach contents, movement of the tube, or inflammation from leftover suture material. In one study of children, granulation tissue developed at the tube site in 35% to 90% of cases depending on the surgical technique used, with smaller skin incisions and less suture material producing significantly lower rates.
Granulation tissue isn’t dangerous but can be uncomfortable, bleed easily, and produce discharge. Treatment typically involves silver nitrate application or steroid creams. Keeping the site dry and minimizing tube movement helps prevent it from forming in the first place. Skin redness, persistent drainage, or increasing pain around the stoma can signal infection and should be evaluated promptly.