Weighted Nasojejunal Tube: How It Works and Why It Is Used
A weighted nasojejunal tube is a thin, flexible feeding tube passed through the nose, down through the stomach, and into the jejunum (the middle part of the small intestine). Its tip contains a small amount of tungsten, a dense metal, which adds weight to help the tube move naturally past the stomach and into position. This tube is used when feeding directly into the stomach is not safe or well tolerated.
Introduction
Feeding is one of the most basic needs in child care, but some children cannot safely receive food through the mouth or stomach for a period of time. In these situations, a tube that delivers nutrition further down the digestive tract, directly into the small intestine, can reduce risks like vomiting or breathing food into the lungs.
The weighted nasojejunal tube addresses a specific clinical problem: some children have stomachs that empty too slowly, or a strong risk of stomach contents moving backward into the airway. Feeding past the stomach, into the jejunum, can lower this risk while still allowing the child to receive nutrition.
This device is non-surgical and does not use radiation on its own. It is a temporary tube, not a permanent implant, and it is generally removed or replaced once the child no longer needs jejunal feeding.
History of the Device
Feeding tubes passed through the nose have been used in medicine for well over a century, originally as simple rubber tubes ending in the stomach. As understanding of digestion and reflux improved through the twentieth century, clinicians recognized that some patients benefited from feeding placed further along the digestive tract, past the stomach.
Early attempts at post-pyloric (past the stomach outlet) feeding relied on tubes that were difficult to guide into place, often requiring repeated attempts or imaging. The introduction of a small weighted tip, first using materials like mercury and later tungsten for safety reasons, helped tubes travel with gut movements toward the small intestine more reliably.
Tungsten replaced mercury in most modern tubes because tungsten is non-toxic and dense enough to provide the same guiding effect without the health risks linked to mercury exposure. This shift became widespread from the late twentieth century onward.
Adaptation for infants and children involved creating smaller diameters, softer and more flexible materials, and clearer length markings suited to smaller bodies. Today, weighted nasojejunal tubes are available in a range of pediatric sizes, used in neonatal and pediatric intensive care units as well as general pediatric wards worldwide.
Purpose of the Device and Where It Is Used
The weighted nasojejunal tube delivers liquid nutrition, and sometimes fluids or medication, directly into the jejunum. It bypasses the stomach, which can help when the stomach is not emptying properly or when there is a high risk of feeds coming back up.
- Feeding children with severe gastroesophageal reflux who are at risk of breathing in stomach contents
- Feeding children with delayed stomach emptying (gastroparesis)
- Supporting nutrition after certain abdominal surgeries
- Feeding critically ill children who cannot tolerate stomach feeding
- Short-term nutritional support while a longer-term feeding plan is decided
These tubes are typically found in hospital settings such as neonatal intensive care units, pediatric intensive care units, and general pediatric wards. They are less commonly used at home because of the need for careful position monitoring.
Different Types of the Device
Weighted-Tip Tube
Contains a small tungsten weight at the tip. The weight helps the tube travel through natural gut movements after initial placement in the stomach, though correct final position still needs to be confirmed.
Unweighted (Plain-Tip) Tube
Does not contain a weighted tip and usually requires more active guidance, such as endoscopic or imaging-assisted placement, to reach the jejunum.
Guidewire-Assisted Tube
Includes a thin internal wire that stiffens the tube during insertion, which is removed once the tube is in place. This can help with more controlled placement in some children.
Dual-Lumen Tube
Has two internal channels, allowing simultaneous jejunal feeding and stomach drainage or decompression, useful in specific clinical situations.
| Type | Typical Age Range | Placement Method | Common Setting |
|---|---|---|---|
| Weighted-tip tube | Newborn to adolescent | Bedside, gravity-assisted | General pediatric ward, ICU |
| Unweighted tube | Older children | Endoscopy or imaging-guided | Endoscopy suite |
| Guidewire-assisted tube | Infant to adolescent | Bedside with wire support | ICU, specialized ward |
| Dual-lumen tube | Infant to adolescent | Imaging-guided | ICU |
Parts and Components of the Device
Tungsten-Weighted Tip
A small, dense segment at the tube's end that adds weight, helping the tube move with gut contractions toward the jejunum after passing through the stomach.
Tube Body
A long, thin, flexible shaft, usually made of soft polyurethane or silicone, designed to be gentle on the inner lining of the nose, throat, and digestive tract.
Length Markings
Printed measurement marks along the tube that help staff record and check how far the tube has been inserted, and monitor for any shift in position over time.
External Fixation Device
A small clip, adhesive anchor, or bridle system that secures the tube to the nose or cheek, reducing the chance of accidental movement or removal.
Connector Port
The external end of the tube, which connects to a feeding pump or syringe for delivering formula, fluids, or medication.
| Component | Function | Typical Replacement Interval |
|---|---|---|
| Tungsten-weighted tip | Aids natural movement into the jejunum | Replaced with whole tube |
| Tube body | Carries feed from outside to the jejunum | Every few weeks or per manufacturer guidance |
| External fixation device | Holds tube securely in place | Changed as needed, often every few days |
| Connector port | Links tube to feeding pump or syringe | Replaced with whole tube |
How the Device Works
The tube is first passed gently through the nose, down the throat, and into the stomach, much like a standard feeding tube. Once in the stomach, the weighted tip helps the tube continue moving forward, guided partly by the child's own gut movements (called peristalsis), through the stomach outlet and into the jejunum.
This process can take time, sometimes several hours, because it relies on the body's natural digestive motion rather than being pushed into place all at once. Healthcare staff check the tube's length markings and may use imaging to confirm when the tip has reached the correct position.
Once positioned correctly, formula or fluids are delivered slowly through the tube, often using a feeding pump that controls the rate, since the jejunum does not store food the way the stomach does.
Step-by-Step User Guide
- Preparation: The trained staff member gathers the tube, lubricant, fixation materials, and measuring tools, and checks the tube for any damage before use.
- Measuring insertion length: The distance from the nose to the stomach, and an estimated additional length to the jejunum, is measured against the child's body and marked on the tube.
- Positioning the child: The child is positioned comfortably, often lying on the right side, which can help the weighted tip move toward the jejunum more easily.
- Gentle insertion: The tube is lubricated and passed slowly through one nostril, down the throat, and into the stomach, while checking the child's comfort throughout.
- Initial position check: Staff confirm the tube has reached the stomach, often by checking withdrawn fluid or other bedside methods.
- Allowing natural migration: The tube is left to advance gradually with gut movement, sometimes over several hours, with the child's position adjusted to assist this process.
- Confirming jejunal placement: Final position is confirmed, often with an X-ray, before any feed is started through the tube.
- Securing the tube: Once confirmed, the tube is firmly but gently fixed to the nose or cheek to prevent accidental movement.
- Starting feeds: Feeding is started slowly, usually through a pump, following the plan set by the healthcare team.
Precautions and Possible Dangers
- The tube may accidentally move out of position, from the jejunum back into the stomach or further
- Incorrect placement, if not confirmed properly, may lead to feeds entering the wrong part of the digestive tract or, rarely, the airway
- Irritation or pressure sores may develop at the nose or fixation site with prolonged use
- Blockage of the tube can occur if not flushed regularly
- Children with certain nose, throat, or digestive tract abnormalities may not be suitable candidates
- Repeated attempts at placement may cause discomfort or minor trauma to the nose and throat lining
How to Keep the Device Safe and Well Maintained
- Flush the tube with water before and after feeds or medication, as instructed by the healthcare team
- Check length markings regularly to detect any shift in tube position
- Inspect the nose and fixation site daily for signs of irritation or skin breakdown
- Store unused tubes in a clean, dry place as per manufacturer instructions
- Keep feeding pump software updated where applicable, following the manufacturer's update schedule
- Maintain a backup feeding plan in case the tube becomes blocked or displaced
- Record placement date and any position checks in the child's care documentation
Interactive Tool: Jejunal Feeding Readiness Checklist
This tool is a general guide only and does not replace professional medical guidance. Always follow the instructions of the treating healthcare team.
Interactive FAQ
When placed and checked correctly, this tube is generally considered safe for infants and children, including premature babies. As with any feeding tube, there are risks, but serious complications are uncommon when position is properly confirmed.
Initial insertion takes only a few minutes, but the tube reaching its final jejunal position can take several hours, since it relies partly on the body's own gut movements.
Nasojejunal tubes vary by tip design (weighted or unweighted), the material used, tube size, and whether a guidewire or a second internal channel for drainage is included.
Inserting the tube itself is not surgical and does not use radiation. However, confirming the exact tip position sometimes involves a brief X-ray, which uses a small amount of radiation.
No. This tube is used for feeding, and sometimes drainage, but it does not diagnose any disease or condition on its own.
Children may feel discomfort, gagging, or an unusual sensation in the nose and throat during insertion, and some mild awareness of the tube afterward, though this often lessens over time.
A nasogastric tube ends in the stomach, while this tube passes further, into the jejunum. It is used specifically when stomach feeding is not safe or well tolerated.
Trained healthcare professionals, such as pediatricians, gastroenterologists, or specially trained nurses, place and manage this tube, usually in a hospital setting.
X-ray confirmation is generally considered the most reliable way to check jejunal placement, more dependable than relying only on fluid checks or listening for sounds, especially in small children.
In many cases the tube can still be used, though the healthcare team may adjust taping methods or monitor the skin around the nose more closely to avoid irritation.
Replacement timing depends on the specific product and manufacturer guidance, but these tubes are generally considered a shorter-term option and may need replacement every few weeks, or sooner if blocked or displaced.
If a child is anxious, the healthcare team may pause, offer comfort measures, involve a caregiver for support, or in some cases consider mild sedation, always prioritizing the child's safety and comfort.
Other Methods and Alternatives
| Method | Basic Principle | Common Use |
|---|---|---|
| Weighted nasojejunal tube | Weighted tip aids passage into the jejunum for post-pyloric feeding | Severe reflux, delayed stomach emptying, aspiration risk |
| Nasogastric (NG) tube | Tube ends in the stomach for direct gastric feeding | Short-term feeding support when stomach feeding is tolerated |
| Nasoduodenal tube | Tube ends in the duodenum, just past the stomach outlet | Intermediate option between gastric and jejunal feeding |
| Percutaneous endoscopic gastrostomy (PEG) tube | Tube placed directly through the abdominal wall into the stomach | Longer-term feeding needs |
| Jejunostomy tube | Tube placed directly through the abdominal wall into the jejunum | Longer-term jejunal feeding needs |
Frequently Overlooked Points Worth Knowing
- A single confirmed position check does not guarantee the tube will stay in place; ongoing monitoring is needed
- Feeding rate through a jejunal tube is usually slower and more continuous than stomach feeding, since the jejunum does not stretch to store large volumes
- The weighted tip helps guide the tube but does not guarantee successful jejunal placement in every case
- Some children may need repeated attempts or an alternative placement method if natural migration does not occur
- Medication given through this tube must be checked for suitability, as not all forms can be safely given past the stomach
Advantages and Limitations
Advantages
- May reduce the risk of feed coming back up into the airway compared to stomach feeding
- Can allow continued nutrition when stomach emptying is delayed
- Bedside placement is possible without surgery in many cases
- Tungsten tip is a non-toxic material compared to older mercury-weighted designs
Limitations
- Placement can take longer than a standard stomach tube, sometimes several hours
- Position must be carefully confirmed, adding complexity to care
- Tube may move out of position over time and require replacement
- Not suitable for very rapid or bolus-style feeding, since jejunal feeding is usually slower and continuous
Troubleshooting Common Problems
| Problem | Possible Cause | Suggested Solution |
|---|---|---|
| Tube appears to have moved (length marking changed) | Accidental pulling, coughing, or vomiting | Stop feeding and have trained staff check position before resuming |
| Tube is blocked | Inadequate flushing or thick formula residue | Attempt gentle flushing as instructed; do not force; seek professional help if unresolved |
| Skin irritation at fixation site | Prolonged tape contact or sensitive skin | Rotate fixation site as advised and inform the healthcare team |
| Feeding pump alarms repeatedly | Kinked tube or air in the line | Check tube for kinks and follow pump manufacturer's troubleshooting steps |
| Tube will not advance past the stomach | Natural migration has not occurred | Healthcare team may reposition the child or use imaging-guided placement |
When to Contact the Manufacturer or Service Provider
- If the tube or feeding pump shows visible damage or malfunction
- If replacement parts, such as fixation devices, are needed
- If there are repeated, unexplained alarms or errors from the feeding pump
- If there is uncertainty about compatibility between the tube and a specific feeding pump model
Suggested Reading and Official Resources
For further reading, the following types of resources provide reliable, in-depth information on nasojejunal feeding and pediatric enteral nutrition:
- Pediatric gastroenterology textbook chapters on enteral feeding access
- Peer-reviewed journal articles on post-pyloric feeding tube placement in children
- World Health Organization resources on child nutrition support
- Manufacturer instructions for use accompanying specific nasojejunal tube products
- Clinical practice guidelines from pediatric nutrition and gastroenterology specialty societies
Labels: GIT-System