At a glance
Enteral and parenteral nutrition support is a medical therapy that delivers essential nutrients directly into the body when a person cannot eat enough by mouth to meet their nutritional needs. The two approaches differ in route: enteral nutrition sends a liquid formula through a tube into the stomach or small intestine, while parenteral nutrition delivers a sterile mixture of proteins, sugars, fats, vitamins, and minerals directly into a large vein.
When the digestive system works but the patient cannot swallow or eat safely, the enteral route keeps the gut active and reduces complications. When the gut itself is not working or needs complete rest, parenteral nutrition bypasses it entirely and feeds the body through the bloodstream. The medical team chooses the route based on the underlying condition, the expected length of treatment, and the state of the patient's gut.
Medical Condition
This therapy is used when a person's body needs nutrients but eating normally is impossible, unsafe, or insufficient to prevent malnutrition (a state where the body lacks the nutrients it needs to function). The goal is always to maintain or restore nutritional status while the underlying illness is being treated.
- Difficulty swallowing (dysphagia) caused by stroke, head and neck cancer, or neurological disease.
- Severe burns or major trauma that dramatically raise the body's nutrient demands.
- Short bowel syndrome, where a large portion of the small intestine has been removed and cannot absorb food properly.
- Crohn's disease (a chronic inflammatory bowel condition) during severe flares that require gut rest.
- After major abdominal surgery when the gut needs time to recover before food can pass through.
- Cancers of the head, neck, or digestive tract that block or severely limit normal eating.
- Severe malnutrition before a planned major surgery, to reduce surgical risk.
- Prolonged unconsciousness or critical illness in an intensive care unit (ICU).
- Pancreatitis (inflammation of the pancreas) when the gut needs to be rested.
Nutrition support is not suitable for every patient in every situation. Doctors generally avoid it in certain circumstances.
- Parenteral nutrition is avoided when the gut is functioning well enough to absorb nutrients, because the enteral route is safer.
- Short-term fasting of a day or two before a minor procedure does not require tube feeding or intravenous nutrition.
- Patients who are in the final stages of a terminal illness may decline artificial nutrition as part of their care preferences, and this decision is respected.
Risks & Complications
Like any medical therapy, nutrition support carries risks that differ depending on which route is used. Enteral nutrition generally has fewer and milder risks than parenteral nutrition.
- Aspiration (inhaling formula into the lungs): the most common serious risk of enteral feeding, especially in patients with reduced consciousness or swallowing problems.
- Tube displacement or blockage: the feeding tube can shift from its correct position or become clogged, requiring replacement.
- Nausea, vomiting, bloating, or diarrhoea from the enteral formula, particularly when feeding is started too quickly.
- Skin irritation or infection at the site where a tube enters through the abdominal wall, if a long-term gastrostomy (a tube placed directly into the stomach) is used.
- Central line infection (bloodstream infection): the most serious risk of parenteral nutrition, because a large catheter (thin tube) sits inside a major vein and can introduce bacteria.
- Thrombosis (a blood clot) forming around the central venous catheter (the large-vein tube used for parenteral feeding).
- Metabolic imbalances, including abnormal blood sugar levels and shifts in electrolytes (salts the body needs for nerve and muscle function), which require regular blood tests to detect.
- Refeeding syndrome: a potentially dangerous shift in electrolytes that can occur when nutrition is restarted too rapidly in severely malnourished patients.
- Liver changes with long-term parenteral nutrition, as the liver processes nutrients differently when they bypass the gut entirely.
- Gut atrophy (weakening and shrinkage of the intestinal lining) with prolonged parenteral nutrition, because the gut is not receiving food to keep it active.
Preparation & Procedure
Before nutrition support is started, the clinical team carries out a full nutritional assessment to determine which route is safest and how much of each nutrient the patient needs. No specific fasting is required before the therapy begins, but the patient or family will be asked about allergies, existing medication including blood thinners, and any known metabolic conditions.
Patients on blood thinners or other medications that affect clotting are monitored carefully, particularly if a central venous catheter needs to be inserted for parenteral nutrition. The team will advise on whether any medications need to be adjusted before the catheter is placed. Smoking and alcohol are discouraged during any hospital admission, as both affect healing and immune function.
Several tests are usually carried out before and during the therapy to guide the formula and catch complications early.
- Blood tests to check protein levels (albumin and pre-albumin), blood sugar, electrolytes, kidney function, and liver function.
- Body weight and, where possible, body composition measurements.
- A swallowing assessment (videofluoroscopy or bedside swallowing test) if enteral nutrition via a mouth-to-stomach tube is being considered.
- Imaging such as an X-ray or ultrasound to confirm tube placement after insertion.
- Baseline heart tracing (ECG, or electrocardiogram) and chest X-ray if a central venous catheter is to be placed.
The procedure itself varies by route. The steps below describe what typically happens when each type of access is established.
- For a nasogastric tube (a flexible tube passed through the nose): the nurse or doctor lubricates the tube, guides it through one nostril, down the throat, and into the stomach while the patient swallows sips of water. Placement is confirmed by X-ray or by testing the aspirated fluid. The tube is then secured to the nose with tape.
- For a nasojejunal tube (passed further into the small intestine): the same initial steps apply, but the tube is advanced past the stomach, usually under X-ray or endoscopic guidance.
- For a gastrostomy or jejunostomy (a tube placed directly through the abdominal wall): this is a minor surgical procedure done under sedation (medicine that makes you drowsy but not fully unconscious) or light general anaesthesia. The surgeon or gastroenterologist creates a small opening in the skin and stomach or intestinal wall, inserts a soft tube, and secures it with an internal disc and an external clip.
- For a central venous catheter for parenteral nutrition: the doctor cleans and numbs the skin near the collarbone or neck, then inserts a thin catheter into a large vein. Placement is confirmed by chest X-ray before feeding begins.
- Once access is confirmed, the nutrition team programmes the pump to deliver the formula at a carefully calculated rate, starting slowly and increasing over hours or days to reduce the risk of intolerance.
Aftercare
Recovery and ongoing care depend heavily on the underlying illness and how long nutrition support is needed. Some patients receive it for a few days in hospital; others continue at home for weeks or months with the support of a community nursing team. Regular monitoring is central to safe long-term use.
- Blood tests are repeated at regular intervals, usually daily at first, to check blood sugar, electrolytes, kidney function, and liver function, and the formula is adjusted based on results.
- The tube or catheter site is inspected daily for signs of infection, redness, or leakage, and the dressing is changed according to a set schedule.
- For enteral feeding, the tube is flushed with water before and after each feed and after medication is given through it, to prevent blockage.
- Oral hygiene (mouth cleaning) is kept up even when nothing is eaten by mouth, to prevent bacterial build-up in the mouth and throat.
- Patients with a long-term gastrostomy tube learn to care for the site themselves or with help from a family member before they leave hospital.
- The nutrition team reviews calorie and protein targets regularly as the patient's condition changes, aiming to transition back to normal eating as soon as the gut can safely handle food.
- Once the underlying condition improves, the team gradually introduces oral food alongside the tube or intravenous feeding before removing the artificial support entirely.
- Follow-up appointments typically include a dietitian (a specialist in clinical nutrition) and the specialist managing the underlying disease.
- Patients on home parenteral nutrition are taught to connect and disconnect the infusion safely, recognise signs of infection, and when to call for help.
Cost & What Determines It
The cost of enteral or parenteral nutrition support varies widely because it is not a single fixed procedure but an ongoing therapy whose total expense depends on how long it runs, which route is used, and what monitoring the patient's condition requires.
- Route of delivery: parenteral nutrition through a central venous catheter involves more equipment, sterile compounding (custom mixing) of the formula by a hospital pharmacy, and closer nursing supervision than enteral tube feeding, so it costs more.
- Duration of therapy: a patient who needs two weeks of support will incur significantly different costs from one who needs six months, especially if the therapy continues at home.
- Underlying diagnosis and complexity: a patient with severe malnutrition and multiple organ problems requires more frequent blood tests, formula adjustments, and specialist consultations than a straightforward post-surgical case.
- Hospital class and country: a university hospital in a high-income country charges differently from a private clinic in a middle-income country, even for the same formula and catheter.
- Catheter type and insertion: some patients need a PICC line (a long thin catheter inserted through a vein in the arm) or a surgically placed port, each with its own cost.
- Formula composition: standard formulas cost less than specialised formulas for liver disease, kidney disease, or immune-modulating needs.
- Medications and supplements: vitamin and mineral additives, blood sugar management medications, and drugs to prevent catheter clotting add to the total.
- Monitoring tests: daily or twice-weekly blood panels over weeks or months represent a significant running cost.
- Home nursing support: if the patient is discharged on home parenteral or enteral nutrition, professional nursing visits or training sessions carry their own fees.
A hospital package for inpatient nutrition support usually covers the room, nursing care, the formula itself, and routine blood tests during admission. What tends to be billed separately includes the catheter insertion procedure, specialist consultations from dietitians or gastroenterologists, any imaging used to confirm tube placement, and take-home supplies if the therapy continues after discharge.
For Indonesian patients, BPJS Kesehatan and most Indonesian private health insurance policies do not cover treatment received abroad. Patients travelling overseas for this therapy typically pay out of pocket or through a private international health insurance policy that explicitly includes overseas medical care. Before travelling, ask the hospital for a written cost estimate that specifies what is included in any quoted package, what will be billed as extras, and what monitoring costs to expect over the planned duration of the therapy. Having this in writing before departure is the most reliable way to avoid unexpected bills.
Frequently Asked Questions
How many sessions of enteral or parenteral nutrition support will I need?
The number of sessions depends on why you need nutritional support and how quickly your body responds. Some patients need it for a few days after surgery, while others with a long-term illness may need it for weeks or months. Your nutrition doctor will reassess regularly and adjust the plan as your condition improves.
What does enteral or parenteral nutrition feel like?
Enteral nutrition, which means feeding through a tube that goes into your stomach or small intestine, may cause mild discomfort or a feeling of fullness at first. Parenteral nutrition, which means nutrients delivered directly into a vein, is generally not painful, though the insertion of the drip line may cause brief soreness. Most patients adjust within a day or two as the care team fine-tunes the rate and formula.
How soon will I feel better once nutrition support starts?
Many patients notice improved energy and strength within several days, though the timeline varies depending on your underlying condition and how depleted your body was before treatment began. Nutrition support works gradually by giving your body the proteins, fats, and carbohydrates it cannot get from normal eating. Your care team will track your progress through regular check-ups and blood tests.
How much does enteral or parenteral nutrition support cost?
The cost depends on several factors specific to your situation, including whether you need enteral or parenteral feeding, the type and volume of formula or nutrients required, how long the support is needed, and the class of hospital or clinic providing the care. Parenteral nutrition tends to involve more equipment and closer monitoring, which can affect the overall price. Requesting a written estimate from the hospital is the most reliable way to understand what you will be charged.
This page is general information, not a substitute for medical advice. Every case is different. Your doctor decides what is right for you.
