A nurse is preparing to discontinue long-term total parenteral nutrition (TPN) therapy for a client. The nurse should plan to discontinue the TPN gradually to reduce the risk of which of the following adverse effects?
A.
Hyperglycemia
B.
Hypoglycemia
C.
Diarrhea
D.
Hypertension
The correct answer and Explanation is :
The correct answer is B. Hypoglycemia.
Explanation:
Total Parenteral Nutrition (TPN) is a form of intravenous feeding that provides all the nutrients a person needs, bypassing the digestive system. It is commonly used in patients who cannot eat or absorb enough nutrients through the gastrointestinal tract. Long-term TPN supplies glucose, amino acids, fats, vitamins, and electrolytes. When discontinuing TPN, it is essential to do so gradually to avoid metabolic complications, particularly hypoglycemia.
Why Hypoglycemia Occurs:
While on TPN, the body becomes accustomed to receiving a constant supply of glucose through the IV solution. The pancreas secretes insulin in response to this steady flow of glucose to regulate blood sugar levels. If TPN is stopped abruptly, the body’s insulin levels remain high while the exogenous glucose supply suddenly drops. This can lead to a significant decrease in blood glucose levels, causing hypoglycemia.
Signs and Symptoms of Hypoglycemia:
- Sweating
- Shakiness
- Confusion
- Dizziness
- Weakness
- Seizures (in severe cases)
Gradually tapering off TPN allows the body time to adjust to the reduced glucose supply and for the pancreas to decrease insulin production accordingly, reducing the risk of sudden hypoglycemia.
Preventing Hypoglycemia:
To prevent hypoglycemia, the nurse should monitor the client’s blood glucose levels during the transition and ensure that oral or enteral nutrition is well-established before completely discontinuing the TPN. Sometimes, an intravenous solution containing dextrose may be administered temporarily after stopping TPN to maintain glucose levels while the patient transitions to other forms of nutrition.
This gradual weaning process helps avoid the dangerous drop in blood sugar and ensures the client’s metabolic system has time to adjust properly.