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Difficulty: MediumPharmacological and Parenteral Therapies

A client with a deep vein thrombosis is receiving a continuous intravenous (IV) infusion of heparin through a single-lumen peripheral IV catheter. The healthcare provider prescribes a new order for intermittent IV vancomycin to treat a concurrent soft tissue infection. Which action by the nurse is most appropriate?

  1. Insert a second peripheral IV catheter to administer the vancomycin infusion.Answer
  2. B
    Attach the vancomycin secondary tubing to the lowest Y-site port of the primary heparin line.
  3. C
    Pause the continuous heparin infusion for 60 minutes while the vancomycin infuses.
  4. D
    Administer the vancomycin as a rapid IV push to minimize the interruption of heparin therapy.

Answer

The most appropriate action is to insert a second peripheral IV catheter to administer the vancomycin infusion.
The most appropriate action is to establish a second peripheral IV site. Heparin and vancomycin are physically incompatible and cannot be administered through the same tubing or Y-site, as they will form a visible precipitate. Furthermore, heparin is a critical, high-alert continuous infusion with a very short half-life. Pausing the heparin infusion for the 60 minutes required to safely administer vancomycin would cause the client's anticoagulation levels to drop into a subtherapeutic range, significantly increasing the risk of thrombus extension or pulmonary embolism. Therefore, a separate, dedicated intravenous line is the only safe solution.

Step-by-Step Solution

1
Analyze the prescribed therapies.
The client requires a continuous heparin infusion for a blood clot and an intermittent vancomycin infusion for an infection.
To identify potential conflicts in medication administration schedules or routes.
2
Evaluate intravenous access and medication compatibility.
The client has a single-lumen line. Heparin and vancomycin are physically incompatible at the Y-site.
To ensure safe administration and prevent potentially fatal precipitation in the IV tubing.
3
Determine the physiological impact of pausing the continuous therapy.
Pausing a continuous heparin drip for the duration of a vancomycin infusion (60+ minutes) is clinically unsafe.
Heparin has a short half-life; interrupting the infusion rapidly lowers therapeutic anticoagulation levels, risking clot expansion.
4
Select the safest nursing intervention.
Establishing a second peripheral IV site is required.
It allows simultaneous, safe administration of both medications without interruption or incompatibility issues.

Key Concept

Intravenous Medication Compatibility and Continuous Infusion Safety
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Topics

Pharmacological and Parenteral Therapies

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