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Difficulty: MediumPharmacological and Parenteral Therapies

A nurse is caring for a client who is receiving continuous total parenteral nutrition (TPN) via a single-lumen peripherally inserted central catheter (PICC). The client is newly prescribed a scheduled dose of intravenous (IV) ceftriaxone. What is the most appropriate action for the nurse to take?

  1. Insert a peripheral IV catheter to administer the ceftriaxone.Answer
  2. B
    Connect the ceftriaxone secondary tubing to the lowest Y-site on the TPN line.
  3. C
    Pause the TPN infusion, flush the PICC, administer the ceftriaxone, and resume the TPN.
  4. D
    Withhold the ceftriaxone until the current TPN bag is empty and the line can be flushed.

Answer

The nurse must insert a new peripheral IV catheter to administer the ceftriaxone.
Total parenteral nutrition (TPN) is a complex, highly concentrated solution that requires a dedicated intravenous line. It should never be mixed with other medications due to a high risk of chemical and physical incompatibility (precipitation). Furthermore, the high dextrose concentration in TPN means the infusion must run continuously; pausing it to administer another medication places the client at severe risk for rebound hypoglycemia. Because the client has a single-lumen PICC currently dedicated to TPN, the only safe and appropriate action is to establish a separate peripheral IV site for the administration of the scheduled antibiotic.

Step-by-Step Solution

1
Analyze the client's current IV access and prescribed therapy.
The client has a single-lumen PICC currently dedicated to a continuous TPN infusion.
Understanding existing line constraints is essential for safe medication administration.
2
Recall the standard administration guidelines for TPN.
TPN requires a dedicated IV line and should never be interrupted or mixed with other medications.
TPN solutions are highly complex and incompatible with most medications, and abrupt cessation can cause hypoglycemia.
3
Determine the safest method to administer the newly prescribed IV antibiotic.
Since the existing central line cannot be used or paused, a new peripheral IV access must be established.
A separate IV line ensures the antibiotic is administered safely and on time without disrupting the continuous TPN supply.

Key Concept

Total Parenteral Nutrition (TPN) Administration Safety
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Topics

Pharmacological and Parenteral Therapies

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