If a feeding tube has just entered the conversation for you or someone you care for, the first wave of questions is almost always about the tube itself: nose or abdomen, stomach or intestine, weeks or years. As a dietitian who builds feeding plans around whichever tube a patient has, I get asked to explain the types of feeding tubes more often than almost anything else in this part of my work. There is no single "right" tube — the choice comes down to how long nutrition support is expected to be needed and which part of the digestive tract can safely take the feed. Here is the plain-language rundown, and why it matters for the plan that follows.
Short-term tubes: NG and NJ
A nasogastric (NG) tube is a thin, flexible tube that runs from the nose, down the esophagus, and into the stomach. It is the tube most people picture first, and it is meant to be temporary. Clinical guidance from the European Society for Parenteral and Enteral Nutrition (ESPEN) points to a ceiling of roughly four to six weeks of NG feeding before a longer-term option should be considered, largely because of the risk of nasal and sinus irritation with prolonged use. A nasojejunal (NJ) tube works the same way but travels further, past the stomach and into the jejunum — the middle section of the small intestine — and is used on a similarly short-term basis, typically removed within four to six weeks for the same reasons.
Long-term tubes: the gastrostomy (G-tube / PEG)
When tube feeding is expected to run past that four-to-six-week window, the conversation usually shifts to a gastrostomy tube, commonly called a G-tube. It is placed directly through the abdominal wall into the stomach, most often using an endoscope in a procedure called a percutaneous endoscopic gastrostomy, or PEG. Unlike an NG tube, a G-tube can stay in place indefinitely, which is why it is the default recommendation once nutrition support looks like it will be needed for more than a few weeks. Tubes held in with an internal balloon are commonly swapped out every few months as the balloon loses integrity, and many long-term users eventually transition to a low-profile "button" device at the skin level for comfort and discretion.
When feeding needs to bypass the stomach: J-tube and GJ-tube
Some patients cannot safely receive feed into the stomach — because of severe reflux, delayed stomach emptying, or a prior surgery, for example — and need the feed delivered further down, directly into the jejunum. A jejunostomy tube (J-tube), often placed as a percutaneous endoscopic jejunostomy (PEJ), goes straight through the abdomen into the jejunum and is considered long-term; many people use one for at least six weeks, and some for years. A gastrojejunostomy tube (GJ-tube, sometimes called PEG-J) is a hybrid: a single tube with an opening in the stomach and an extension into the jejunum, which allows feeding into the small intestine while still giving the option to vent or decompress the stomach. GJ-tubes are typically changed every four to twelve months, or sooner if they become blocked or shift out of place.
Why the tube type changes what a dietitian actually does
The location a tube feeds into is not just an anatomical detail — it drives real decisions in a nutrition plan. Formula delivered into the stomach can usually be given as periodic bolus feeds, which is closer to a normal meal rhythm and gives more flexibility around a school or work day. Formula delivered into the jejunum bypasses the stomach's natural rate-limiting function, so it generally has to run slowly and continuously through a pump rather than as a bolus, or it risks cramping, bloating, or dumping-type symptoms. That single difference reshapes the whole day: how many hours someone is connected to a pump, what formula concentration and osmolarity is tolerated, and how caregivers plan around sleep, school, or work. It also affects how a dietitian troubleshoots problems — slow gravity drip versus pump rate, formula strength versus water flush volume — because the answer that works for a stomach-fed patient can be exactly wrong for a jejunally-fed one. This is exactly why the "which tube" conversation and the "what feeding plan" conversation happen together, not separately.
Tube placement itself is a medical decision made by the prescribing physician or surgical team, based on the underlying condition, expected duration of need, and how the gut is functioning. What a dietitian brings to that decision is the practical translation afterward: matching formula type and delivery method to whichever tube was chosen, and adjusting as the clinical picture changes. A patient who starts on a short-term NG tube after a hospital stay may transition to a G-tube if recovery takes longer than expected, and the feeding plan has to shift right along with it — from a temporary bridge to a sustainable long-term routine.
Feeding tube types at a glance
| Tube | Enters through | Feeds into | Typical duration |
|---|---|---|---|
| NG (nasogastric) | Nose | Stomach | Up to 4–6 weeks |
| NJ (nasojejunal) | Nose | Jejunum (small intestine) | Up to 4–6 weeks |
| G-tube / PEG (gastrostomy) | Abdomen | Stomach | Indefinite; balloon devices often changed every few months |
| J-tube / PEJ (jejunostomy) | Abdomen | Jejunum | Long-term; commonly 6–12 months between changes |
| GJ-tube / PEG-J (gastrojejunostomy) | Abdomen (via stomach) | Jejunum, with stomach access retained | Long-term; typically changed every 4–12 months |
The takeaway
Understanding the types of feeding tubes is really about understanding two questions: how long is this needed for, and which part of the gut can safely take the feed? Short-term, nose-based tubes (NG and NJ) are meant to bridge a few weeks. Long-term, abdomen-based tubes (G-tube, J-tube, and GJ-tube) are built for months or years, and the exact placement — stomach versus small intestine — determines whether feeding can happen in flexible bolus sessions or has to run slowly by pump. None of this needs to be sorted out alone. A registered dietitian working alongside the placing physician can translate whichever tube is chosen into a feeding schedule, formula choice, and flush routine that actually fits daily life.