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# Parenteral nutrition: line care, glucose checks, refeeding risk and monitoring

- Procedure

Parenteral nutrition runs through a central line by pump: strict asepsis, scheduled glucose checks, and a close watch for refeeding in the first days.

Updated Nov 13, 2026

## Key points

- Parenteral nutrition is used only when enteral feeding is not possible; it runs through a central line by pump.
- Hand hygiene and aseptic technique before every access; scrub the connector and use only sterile devices.
- Change sets that carry lipids within 24 hours of starting the infusion; never run it through a pressure-monitoring circuit.
- Capillary glucose on the protocol's schedule (often every 6 hours): high glucose is common and linked to infection.
- Most hypoglycaemia follows unplanned interruptions: if the infusion stops, check glucose and tell the team.
- Refeeding: in the first 2 to 5 days watch phosphate, potassium and magnesium, the fluid balance, oedema, the heart and confusion.

## What it is

Parenteral nutrition gives glucose, amino acids, electrolytes, vitamins, minerals and usually lipids into a vein when the gut cannot be used. The solution is concentrated, so it runs through a central line, always by pump. The nurse's checks are about safety: the right bag for the right patient, an aseptic line, scheduled capillary glucose, the fluid balance and weight, the laboratory results and the signs of refeeding syndrome in at-risk patients. Amounts and rates are set by the prescriber and the nutrition team; this page gives none.

## Indications

- A gut that cannot be used: paralytic ileus, or after bowel surgery such as a resection.
- Severe malnutrition when enteral feeding is not possible.
- Other situations named by the open sources: severe burns, metastatic cancer, liver failure and severe vomiting in pregnancy.

## Contraindications and precautions

- Central venous access only: the concentrated solution irritates smaller veins.
- Many protocols keep one lumen only for parenteral nutrition; the CDC makes no recommendation on this, so follow your protocol.
- Refeeding risk: very low weight, recent weight loss, little or no intake for a long time, low potassium, phosphate or magnesium before feeding, alcohol or drug use, cancer, frailty, anorexia nervosa.
- In at-risk patients the team starts slowly, gives thiamine before or at the start of feeding and replaces electrolytes as prescribed.
- Check every bag against the prescription and the label, and inspect it as the protocol says before hanging it.

## Equipment

- The prescribed bag, checked against the prescription and the patient's identity.
- Infusion pump and the administration set the protocol specifies.
- Antiseptic for the connector and sterile caps or devices.
- Glucose meter and strips.
- Scale and fluid balance chart.

## Step by step (and why)

- Do hand hygiene and use aseptic technique before every access — the line is a direct path for infection.
- Check the bag against the prescription, identity, expiry and appearance with a second nurse if required — errors and damaged bags harm.
- Scrub the connector with antiseptic and access it only with sterile devices — it lowers line infection.
- Prime the set without air and run it by pump only — a pump keeps the prescribed rate.
- Change lipid-containing sets within 24 hours and label them; other sets as the protocol says — lipids support bacterial growth.
- Check capillary glucose on the protocol's schedule and report values outside the targets — high glucose is common.
- If the infusion stops unplanned, check glucose and tell the team — sudden stops cause hypoglycaemia.
- Weigh daily if ordered, keep a fluid balance and take vital signs — refeeding and overload show here first.
- Follow the ordered tests (phosphate, potassium, magnesium, sodium, glucose, kidney) in the first week and report falls.
- Inspect the site and dressing each shift and check temperature — catch line infection early.

## Complications

- Central line infection: fever, chills, redness or discharge at the site (see central line care).
- High blood glucose, common during parenteral nutrition and linked to infection and death.
- Low blood glucose, mostly after unplanned interruptions.
- Refeeding syndrome: fast heart rate and breathing, arrhythmias, heart failure, oedema, weakness, confusion, seizures, and Wernicke encephalopathy from low thiamine.
- Fluid overload, and nutrient excess shown by the laboratory tests.

## Next step: when to call for help

- Call for fever, chills or changes at the line site.
- Call for glucose values outside the protocol's targets, and for any unplanned stop of the infusion.
- Call in the first days for new oedema, breathlessness, a fast or irregular pulse, weakness or confusion: possible refeeding syndrome.
- Report falls in phosphate, potassium or magnesium as soon as the results arrive.
- Report a blocked line, a damaged or wrong bag, or a pump problem.

## Test yourself

Think of the answer, then tap the question to see it.

## Why does parenteral nutrition run through a central line?

The solution is concentrated and irritates small veins, so it needs a large central vein, and it always runs by pump.

## How often is the set that carries lipids changed?

Within 24 hours of starting the infusion, according to the CDC guideline.

## What should the nurse do if parenteral nutrition stops unexpectedly?

Check the capillary glucose and tell the team: most hypoglycaemia in these patients follows unplanned interruptions.

## When does refeeding syndrome usually appear, and what do you watch?

Usually in the first 2 to 5 days: phosphate, potassium and magnesium, fluid balance and weight, oedema, heart rate and rhythm, breathing and mental state.

[Add to my cards (4)](https://durgical.app/estudiar/?add=/en/nursing/parenteral-nutrition-line-care-glucose-checks-refeeding-risk-and-monitoring/)

## Connections

## Related 4

- [Central venous catheter care](https://durgical.com/en/nursing/central-venous-catheter-care/)
- [Capillary blood glucose testing](https://durgical.com/en/nursing/capillary-blood-glucose-testing/)
- [Nutrition screening and helping patients eat](https://durgical.com/en/nursing/nutrition-screening-and-helping-patients-eat/)
- [Enteral feeding: checking the tube, feeding and care](https://durgical.com/en/nursing/enteral-feeding-checking-the-tube-feeding-and-care/)

## Related conditions 2

- [Short bowel syndrome](https://durgical.com/en/conditions/short-bowel-syndrome/)
- [Refeeding syndrome](https://durgical.com/en/conditions/refeeding-syndrome/)

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Educational content for students; it does not replace your institution's protocols, supervised clinical training or a prescriber's order. Dose-calculation examples use made-up numbers: they are educational, not a clinical order.

Sources: [Nursing Fundamentals, 14.3 Nutrition: Applying the Nursing Process](https://med.libretexts.org/Bookshelves/Nursing/Nursing_Fundamentals_(OpenRN)/14%3A_Nutrition/14.03%3A_Applying_the_Nursing_Process) (Open RN (Chippewa Valley Technical College), LibreTexts, 2021); [Guidelines for the Prevention of Intravascular Catheter-Related Infections (2011): Summary of Recommendations](https://www.cdc.gov/infection-control/hcp/intravascular-catheter-related-infections/summary-recommendations.html) (Centers for Disease Control and Prevention, 2011); [The refeeding syndrome: a neglected but potentially serious condition for inpatients. A narrative review](https://pmc.ncbi.nlm.nih.gov/articles/PMC7843537/) (Internal and Emergency Medicine (open access, CC BY 4.0, PMC), 2021); [Differences in glycemic control in diabetic and non-diabetic patients with parenteral nutrition using a basal plus correction insulin regimen](https://pmc.ncbi.nlm.nih.gov/articles/PMC5984936/) (Diabetes Therapy (open access, CC BY-NC 4.0, PMC), 2018).

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Representative model, for educational purposes only.

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Source: https://durgical.com/en/nursing/parenteral-nutrition-line-care-glucose-checks-refeeding-risk-and-monitoring/
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/nursing/parenteral-nutrition-line-care-glucose-checks-refeeding-risk-and-monitoring/