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Difficulty: MediumPharmacological and Parenteral Therapies

A client with short bowel syndrome is receiving continuous total parenteral nutrition (TPN) through a single-lumen central venous catheter. The electronic health record indicates a new prescription for an intermittent intravenous antibiotic. Upon assessment, the nurse notes the client does not have any other established venous access. What is the most appropriate action by the nurse?

  1. Obtain supplies and establish a new peripheral venous access site for the antibiotic.Answer
  2. B
    Attach the antibiotic tubing to the lowest injection port on the central line tubing.
  3. C
    Stop the central line infusion temporarily, flush with normal saline, infuse the antibiotic, and flush again.
  4. D
    Withhold the antibiotic until the current nutritional bag is empty and the line is available.

Answer

Establish a new peripheral venous access site for the antibiotic.
Total parenteral nutrition (TPN) must always be infused through a dedicated line or a dedicated lumen of a central catheter. This prevents drug-nutrient incompatibilities, precipitation, and reduces the risk of central line-associated bloodstream infections. Because the client only has a single-lumen central line, establishing a new peripheral IV is the only safe and appropriate action.

Step-by-Step Solution

1
Analyze the client's current intravenous therapy.
The client is receiving continuous TPN through a single-lumen central line.
Understanding the properties of the current infusion is essential for safe medication administration.
2
Evaluate the rules for parenteral nutrition administration.
TPN requires a dedicated intravenous line. No other medications or fluids should be infused through the same lumen.
TPN solutions are highly complex and prone to precipitation when mixed with other drugs. The high dextrose content also increases infection risk if the line is accessed frequently.
3
Determine the safest method to administer the newly prescribed antibiotic.
A separate intravenous access must be obtained.
Since the central line is a single lumen dedicated to TPN, a new peripheral IV is necessary to safely give the antibiotic without interrupting nutrition or risking incompatibility.

Key Concept

Total parenteral nutrition (TPN) must be administered through a dedicated intravenous line or a dedicated lumen of a multi-lumen catheter. Other medications should never be piggybacked or administered through a dedicated TPN line.
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Topics

Pharmacological and Parenteral Therapies

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