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Difficulty: MediumPharmacological and Parenteral Therapies

A nurse is caring for a client who is receiving continuous total parenteral nutrition (TPN) through a dedicated lumen of a multi-lumen central venous catheter (CVC). The healthcare provider prescribes a scheduled dose of an intravenous (IV) antibiotic. Which of the following actions is the most appropriate for the nurse to take when administering the medication?

  1. Administer the antibiotic through an alternate, available lumen of the central venous catheter.Answer
  2. B
    Attach the antibiotic as a secondary piggyback to the Y-site of the TPN infusion tubing.
  3. C
    Pause the TPN infusion, flush the lumen with normal saline, infuse the antibiotic, and resume the TPN.
  4. D
    Insert a new peripheral intravenous catheter to serve as a dedicated line for the antibiotic.

Answer

The nurse should administer the antibiotic through an alternate, available lumen of the central venous catheter.
Total parenteral nutrition (TPN) solutions have a very high glucose and nutrient concentration, making them highly susceptible to both chemical incompatibility and bacterial contamination. Consequently, standard nursing practice mandates that TPN must be infused through a strictly dedicated line or a dedicated lumen of a multi-lumen catheter. Because the client has a multi-lumen central venous catheter, the nurse can safely administer the antibiotic through a separate, available lumen. The separate lumens allow incompatible fluids to enter the central bloodstream independently, where high blood flow instantly dilutes them.

Step-by-Step Solution

1
Assess the current intravenous access and the prescribed therapies.
The client has a multi-lumen central venous catheter with one lumen dedicated to TPN, and requires IV antibiotic administration.
Understanding the available access determines the safest route for new intravenous medications without compromising existing infusions.
2
Identify the safety principles regarding TPN administration.
TPN must always run through a strictly dedicated line or lumen to prevent precipitation, chemical incompatibility, and infection.
The hypertonic, complex nature of TPN makes it highly reactive with other medications.
3
Select the intervention that preserves the dedicated TPN line while safely delivering the antibiotic.
Utilizing a separate, available lumen on the existing multi-lumen catheter achieves both goals.
Multi-lumen catheters are designed to infuse incompatible solutions simultaneously, as the lumens exit at different points in the high-flow central venous system.

Key Concept

TPN Administration Safety and Line Compatibility
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Topics

Pharmacological and Parenteral Therapies

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