Enteral and Parenteral Nutrition Support
Enteral and Parenteral Nutrition Support provides specialist nutritional management by a clinical dietitian when patients cannot meet their nutritional needs through oral intake -- prescribing and monitoring tube feeding (enteral) or intravenous nutrition (parenteral) to prevent malnutrition and support recovery.
Overview
Nutritional support by enteral or parenteral routes is prescribed by clinical dietitians as part of the nutrition support team when oral intake is inadequate to meet nutritional requirements. Enteral nutrition -- delivered via nasogastric, nasojejunal, PEG, or PEJ tube -- is always preferred over parenteral nutrition when the gastrointestinal tract is functional, as it maintains gut integrity, reduces infection risk, and is more physiological and cost-effective. Parenteral nutrition delivered intravenously is reserved for patients in whom the gastrointestinal tract is non-functional, inaccessible, or requires complete rest.
Types of Nutritional Support Routes
- Nasogastric Tube Feeding (short-term -- for patients unable to swallow safely)
- Nasojejunal Tube Feeding (for patients with gastroparesis or aspiration risk)
- Percutaneous Endoscopic Gastrostomy (PEG -- long-term enteral access)
- Percutaneous Endoscopic Jejunostomy (PEJ -- long-term post-pyloric feeding)
- Peripheral Parenteral Nutrition (short-term IV nutrition via peripheral vein)
- Total Parenteral Nutrition (TPN -- complete nutrition via central venous catheter)
- Supplemental Parenteral Nutrition (combined oral/enteral and IV nutrition)
- Home Enteral or Parenteral Nutrition (long-term community nutrition support)
Indications for Enteral or Parenteral Nutrition
- Dysphagia from stroke, neurological disease, or head and neck cancer surgery
- Severe mucositis from chemotherapy or radiotherapy preventing adequate oral intake
- Gastrointestinal obstruction or ileus requiring bowel rest
- Short bowel syndrome with insufficient absorptive length
- Severe acute pancreatitis requiring jejunal feeding beyond the pancreas
- ICU patients unable to meet nutritional requirements enterally alone
- Major surgery with prolonged anticipated gut dysfunction
- Cystic fibrosis, IBD, or other conditions with chronic malabsorption
Goals of Nutritional Support Therapy
- Prevent or treat protein-energy malnutrition during illness or treatment
- Maintain lean body mass and immune function during catabolic illness
- Support wound healing and surgical recovery
- Provide adequate protein, carbohydrate, fat, vitamins, and minerals
- Prevent complications of malnutrition -- pressure ulcers, infections, delayed recovery
- Transition safely from artificial to oral nutrition when appropriate
- Support quality of life through adequate nutrition even when oral eating is impossible
- Manage complications of tube feeding including refeeding syndrome and tube displacement
Key Benefits
Discover the advantages of choosing our enteral and parenteral nutrition support services.
Nutrition support prevents or treats malnutrition during illness when oral intake is impossible
Enteral nutrition maintains gut integrity and immune function avoiding PN complications
PN provides complete nutrition intravenously when the gut cannot be used
Home nutrition support enables discharge from hospital for patients with long-term needs
Regular dietitian review optimises prescription and prevents long-term nutritional deficiencies
Clinical Features
The technology, techniques and clinical approach behind our enteral and parenteral nutrition support.
Gut function assessment determines enteral versus parenteral route selection
Aseptic catheter care protocols prevent catheter-related bloodstream infection in PN
Progressive feed rate escalation prevents refeeding syndrome
Daily electrolyte monitoring in the first week detects refeeding biochemical changes
Graduated transition to oral intake prevents premature withdrawal of nutrition support
Preparation Instructions
Report any tube displacement, leak, or blockage immediately and do not attempt to replace or unblock a gastrostomy tube without specialist guidance. Attend all blood monitoring appointments as electrolyte disturbances during nutrition support can be life-threatening. Report any feed intolerance symptoms -- nausea, vomiting, diarrhoea, or significant abdominal distension -- to the nutrition team promptly. Do not adjust your own feed rate without dietitian advice.
The Procedure
Step-by-step guide to what you can expect during your enteral and parenteral nutrition support procedure.
Nutritional Requirements Calculation
Energy requirements (Harris-Benedict or 25 to 35 kcal/kg/day) and protein requirements (1.2 to 2 g/kg/day depending on clinical condition) are calculated. The most appropriate nutrition support route is selected based on gut function accessibility and anticipated duration.
Access Device Management
Nasogastric tube position is confirmed by pH testing or X-ray before feeds commence. PEG or PEJ placement is planned with the endoscopy team. Central venous catheter care for PN follows strict aseptic protocols to prevent catheter-related bloodstream infection.
Feed Initiation and Tolerance Assessment
Enteral feeding is introduced at a low rate and increased progressively over 24 to 48 hours. Gastric residual volumes bowel sounds and abdominal comfort are monitored. Tolerance symptoms (nausea vomiting diarrhoea distension) trigger rate reduction or formula change.
Biochemical Monitoring
Daily electrolytes (particularly phosphate potassium and magnesium) are checked in the first week to detect refeeding syndrome. Twice-weekly LFTs glucose and triglycerides monitor PN tolerance. Trace element and vitamin levels are checked weekly.
Transition to Oral Intake
As oral intake improves the nutrition support rate is reduced proportionally while oral intake is monitored and quantified. Bridging support is maintained until oral intake consistently exceeds 60% of requirements. Premature withdrawal risks acute nutritional deterioration.
Home Nutrition Support Planning
Patients requiring long-term enteral or parenteral nutrition at home are assessed for suitability trained in self-management and referred to the home nutrition support team. Regular community dietitian review monitors nutritional status and home feeding tolerance.
What to Expect
The clinical dietitian calculates your individual energy and protein requirements based on your clinical condition, body composition, and degree of metabolic stress. An appropriate feed type, rate, and schedule is prescribed. For enteral nutrition, tube position is confirmed before feeds commence and the feed is introduced gradually to assess tolerance. For parenteral nutrition, the solution is compounded under pharmacy supervision with electrolytes adjusted based on daily blood results.
Frequently Asked Questions
Common questions about enteral and parenteral nutrition support.
Related Services
Explore other services in our Dietitian department.
Medical Nutrition Therapy for Diabetes
Weight Management Dietetics
Renal Diet Therapy
Ready to Get Started?
Schedule your consultation today and take the first step towards better health.