What condition can occur if Total Parenteral Nutrition (TPN) is stopped suddenly?

NORCET 10 Prelims-2026

Medical & Surgical Nursing

Medium

Appeared in: NORCET 10 Prelims-2026

Explanation

Total Parenteral Nutrition (TPN) solutions have a high concentration of dextrose (sugar), which provides calories.
Continuous infusion of TPN causes the pancreas to produce high levels of insulin to manage the constant glucose load.
If TPN is stopped abruptly, the glucose source is removed, but the high insulin levels persist in the bloodstream.
This mismatch leads to a rapid uptake of glucose from the blood into the cells, causing a sharp drop in blood sugar known as rebound hypoglycemia.

Option A: Hyperglycemia (high blood sugar) is a risk when TPN is initiated or infused too rapidly, not when it is stopped.
Option C: Hypernatremia (high sodium) is an electrolyte imbalance related to fluid status, not the direct result of stopping the glucose infusion in TPN.
Option D: While fluid imbalances can occur with TPN, the most acute and dangerous complication of sudden cessation is metabolic (hypoglycemia), not dehydration.

Visual 1: Flowchart: Illustrating the pathophysiology of rebound hypoglycemia. Start with 'Sudden Cessation of TPN' -> 'Abrupt stop of glucose supply' -> 'Pancreas still secreting high levels of insulin' -> 'Rapid cellular uptake of glucose from blood' -> 'Hypoglycemia (low blood sugar)'.
Visual 2: Infographic: Comparing the signs and symptoms of hypoglycemia (shakiness, sweating, confusion, tachycardia) versus hyperglycemia (thirst, frequent urination, headache, lethargy).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Complications of Total Parenteral Nutrition (TPN) Discontinuation as background academic context rather than a clinical decision trigger.
Patient safety is paramount. Never abruptly stop a TPN infusion unless absolutely necessary. Always follow protocol for tapering the rate.
Nurses must ensure that an appropriate dextrose solution (e.g., D10W) is readily available on the unit for any patient receiving TPN in case of an emergency discontinuation.
What if? If the TPN line becomes clotted and a new bag is not immediately available, the nurse's first action should be to hang D10W at the prescribed TPN rate and then notify the primary provider and pharmacy.

How to Approach the Question

First, identify the key components of the question: 'Total Parenteral Nutrition (TPN)' and 'stopped suddenly'.
Recall the primary composition of TPN. It is a hypertonic solution rich in dextrose (glucose).
Consider the body's physiological response to a continuous high-glucose infusion. The pancreas will increase insulin production to maintain normal blood sugar levels.
Now, analyze the effect of 'stopping suddenly'. The high-glucose infusion is cut off, but the body's high insulin production does not stop immediately.
Deduce the outcome: High insulin levels without a glucose source will drive the remaining blood glucose into the cells, causing blood sugar levels to plummet. This condition is hypoglycemia.
Evaluate the options based on this deduction. Hypoglycemia is the direct and immediate consequence. The other options are related to different TPN complications.

Concept Tested & Keywords

Concept Tested: Complications of Total Parenteral Nutrition (TPN) Discontinuation
Stem keywords: Total Parenteral Nutrition, TPN, stopped suddenly
Lead-in keywords: What condition
Negative lead-in flag: false

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