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Difficulty: HardPharmacological and Parenteral Therapies

A client with a systemic methicillin-resistant *Staphylococcus aureus* (MRSA) infection and a deep vein thrombosis is receiving a continuous intravenous (IV) infusion of heparin through a single-lumen peripheral IV catheter. The nurse prepares to administer a scheduled dose of IV vancomycin 1 g1\text{ g}, which must infuse over 90 minutes90\text{ minutes}. A drug reference indicates that vancomycin and heparin are incompatible at the Y-site. Which action should the nurse take?

  1. A
    Pause the heparin infusion, flush the catheter with normal saline, infuse the vancomycin, and flush again.
  2. B
    Administer the vancomycin through the IV port closest to the client to minimize mixing time in the tubing.
  3. Establish a second peripheral IV access to administer the vancomycin infusion.Answer
  4. D
    Contact the healthcare provider to request changing the vancomycin to an oral formulation.

Answer

Establish a second peripheral IV access to administer the vancomycin infusion.
The correct action is to establish a second peripheral IV access. Heparin and vancomycin are chemically incompatible and cannot be administered through the same IV line simultaneously. Because heparin has a very short half-life, pausing the continuous infusion for a 90-minute90\text{-minute} vancomycin administration would cause the client's anticoagulation levels to drop rapidly into a subtherapeutic range, severely increasing the risk of thrombus extension. Therefore, the safest and most effective nursing action is to insert a new, dedicated peripheral IV line for the antibiotic.

Step-by-Step Solution

1
Identify the incompatibility between intravenous heparin and vancomycin at the Y-site.
Recognize that the two medications cannot physically mix in the same IV line without forming a dangerous precipitate.
Mixing incompatible medications can cause crystallization, leading to severe complications like catheter occlusion or emboli.
2
Evaluate the feasibility of pausing the continuous heparin infusion.
Determine that pausing the heparin for 90 minutes90\text{ minutes} is clinically unsafe for this client.
Heparin has a very short half-life (60 to 90 minutes60\text{ to }90\text{ minutes}). Stopping the infusion for an extended period risks rapid decline in anticoagulation levels and potential thrombus extension.
3
Select the safest alternative intervention based on nursing scope of practice.
Decide to establish a new, dedicated peripheral IV line.
A separate IV access allows both critical medications to infuse simultaneously and safely without physical interaction or therapeutic interruption.

Key Concept

IV compatibility and pharmacokinetics of continuous high-alert infusions
Estimated Time:1m 30s
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Topics

Pharmacological and Parenteral Therapies

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