Gastrostomy Tube
- A gastrostomy tube is a feeding shortcut: a small tube that goes straight through the belly wall into the stomach, bypassing a mouth or throat that can't safely do the swallowing.
- IR places it under fluoroscopy by inflating the stomach with air, pinning it to the abdominal wall, and threading a tube in — no endoscope required.
- The usual customers are people who can't swallow safely (stroke, head and neck cancer, ALS) but still have a working gut downstream.
- The scary early complication is a tube that tracks into the peritoneum or a nearby organ instead of the stomach; the late annoyances are leakage, clogging, and the tube falling out.
- A G-tube feeds the stomach; a GJ-tube extends past the stomach into the jejunum for people who reflux and aspirate their feeds.
Imagine the stomach is a water balloon sitting just behind the front wall of the abdomen, and someone needs to get soup into it without going through the front door (the mouth). A gastrostomy tube is the side window we install for exactly that purpose — a permanent, refillable hatch from the outside world straight into the stomach.
It sounds dramatic, but it's one of the most quietly life-changing things interventional radiology does. The patient who couldn't get enough calories in suddenly can.
Who actually needs one
The common thread: the plumbing downstream of the stomach works fine, but the road into the stomach is broken or unsafe.
- Neurologic swallowing failure — stroke, advanced dementia, ALS. The brain can't coordinate a safe swallow, so food keeps heading for the lungs.
- Mechanical obstruction up top — head and neck cancers, or an esophageal tumor blocking the path.
- Long-haul nutrition — anyone who'll need tube feeding for more than a few weeks, since a nose tube taped to the face is miserable as a long-term plan.
There's also a less obvious use: venting. In bowel obstruction that isn't getting fixed, a G-tube can drain the stomach instead of fill it — a relief valve for a backed-up system.
Before you poke: the safety checklist
The whole game is making sure the needle's path from skin to stomach doesn't cross anything important. Two organs love to get in the way.
The transverse colon can drape across the front of the stomach, and the left lobe of the liver can hang down over it. Push a tube blindly and you can skewer either one, creating a gastrocolic fistula or a bleeding liver tract. This is why we distend the stomach big and image carefully first.
To make the target obvious, the stomach gets inflated with air — usually through a thin nasogastric tube — until it balloons up and shoves the colon and liver out of the firing line. A puffed-up stomach is a big, easy, well-separated target. A flat one is a trap.
Significant ascites is a real problem: fluid between the stomach and the abdominal wall keeps the two surfaces from sealing together, so the tract may never mature and the feeds can leak into the belly. Uncorrectable coagulopathy and no safe window are the other classic reasons to stop and rethink.
How IR actually places it
The radiologic version is done under fluoroscopy — real-time X-ray — rather than with a scope down the throat. The rough choreography:
- Inflate the stomach with air so it presses against the abdominal wall.
- Gastropexy (often): fire a few tiny T-fastener anchors through the skin to tack the stomach wall snugly to the inside of the abdominal wall, like stapling two sheets of paper together before you cut. This holds the target still and seals the seam.
- Puncture through skin into the air-filled stomach with a needle, confirm position, then exchange over a wire.
- Dilate the tract and slide the feeding tube in, inflating its retention balloon or deploying its pigtail so it can't slip back out.
- Confirm with a little water-soluble contrast that the tube tip sits in the stomach lumen and nothing's leaking.
G-tube versus GJ-tube
Sometimes the stomach itself is the problem — the patient refluxes feeds back up and aspirates them. The fix is to feed past the stomach.
| Feature | Gastrostomy (G) | Gastrojejunostomy (GJ) |
|---|---|---|
| Tube tip sits in | Stomach | Jejunum, past the stomach |
| Feeding style | Can give bolus "meals" | Needs slow continuous drip |
| Best for | Most patients | Severe reflux / aspiration risk, gastroparesis |
| Trade-off | Simpler, more forgiving | Longer tube, clogs and migrates more easily |
A GJ-tube is basically a G-tube with a long extension threaded through the pylorus into the small bowel — more real estate, more ways to get cranky.
When it goes wrong
A small amount of water-soluble contrast through a fresh tube is the cheapest insurance you'll ever buy: it confirms the tip is intraluminal and rules out a leak before anyone runs feeds. If contrast tracks into the peritoneum instead of swirling in the stomach, stop.
The early disaster is malposition — the tube tracking into the peritoneal cavity or through colon or liver, which can seed peritonitis if feeds go in. Bleeding and bowel injury round out the acute list. These are the reasons everything above is so paranoid about the needle's path.
The late issues are more mundane but more common: the tube clogs (crushed pills are the usual culprit), leaks around the site, gets dislodged, or the internal balloon deflates and the whole thing slides out. A dislodged tube is a clock-watching problem — a mature tract can close surprisingly fast, so a tube that falls out often needs replacing the same day before the window heals shut.
A G-tube that comes out is not always an emergency, but the tract it leaves behind is impatient — it can start closing within hours, so don't sit on a dislodged tube assuming it'll wait for you.
The same image-guided, "distend-anchor-puncture-confirm" mindset shows up across nonvascular IR — it's the exact logic behind percutaneous abscess drainage: find a safe window, get into the right space, and prove you're there before you trust it.