Hypoglycemia in Enteral or Parenteral Feeding When Initial Carbohydrate Treatment Has Not Raised Blood Glucose

This protocol addresses adults receiving enteral or parenteral nutritional support who develop moderate to severe hypoglycemia — blood glucose below 4.0 mmol/L — and in whom a first-line intervention has not achieved recovery. The clinical setting shapes both the urgency and the specific approach taken.

Clinical Scenario

The patient is on enteral or parenteral feeding with a blood glucose below 4.0 mmol/L. Additional clinical factors — including renal and cardiac status — bear directly on how this situation is managed.

When the First Step Has Not Worked

The preceding step involved delivering rapid-acting carbohydrate via the feeding tube. This protocol applies when blood glucose has not risen above 4.0 mmol/L on remeasurement 10 to 15 minutes after that treatment — or after three treatment cycles without recovery.

Next-Line Approach

When enteral carbohydrate has failed to correct hypoglycemia, intravenous glucose is the indicated next step. The full protocol specifies which formulation and approach to use, with important adjustments for patients with renal or cardiac failure — and sets out how feeding is restarted once blood glucose has recovered above 4.0 mmol/L.

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References

E. Adults requiring enteral/parenteral feeding
If blood glucose remains less than 4.0mmol/L after 30-45 minutes (or 3 treatment cycles) give 100ml of 20% glucose at 400ml/hour or 200ml of 10% glucose at 800ml/hour over 15 minutes.
The smallest possible volume should be administered in renal and/or cardiac failure.
10% IV glucose at 100ml/hr. Volume should be determined by clinical circumstances (refer to Appendix 5 for administration details)

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