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Difficulty: MediumPharmacological and Parenteral Therapies

A medical-surgical nurse is preparing to administer a scheduled dose of intravenous ceftriaxone 1 g1\text{ g} to an adult client diagnosed with bacterial pneumonia. The client currently has a single-lumen peripheral venous catheter that is continuously infusing Lactated Ringer's solution at 125 mL/hr125\text{ mL/hr}. What is the most appropriate nursing intervention for safely delivering the prescribed antibiotic?

  1. A
    Program the intravenous pump to deliver the antibiotic volume rapidly over 10 minutes10\text{ minutes} to quickly establish peak serum therapeutic levels.
  2. B
    Connect the antibiotic secondary tubing to the primary line's uppermost port so the medications can infuse simultaneously.
  3. Suspend the running maintenance fluid, thoroughly flush the catheter with 0.9% sodium chloride, administer the antibiotic, and follow with another flush.Answer
  4. D
    Postpone the antibiotic administration until the current bag of maintenance fluid is completely empty to minimize the risk of circulatory volume overload.

Answer

Suspend the running maintenance fluid, thoroughly flush the catheter with 0.9% sodium chloride, administer the antibiotic, and follow with another flush.
Ceftriaxone is physically incompatible with calcium-containing solutions, such as Lactated Ringer's, because they form a dangerous precipitate when mixed. For an adult client with a single-lumen catheter, the nurse must ensure the incompatible fluids never interact by suspending the continuous fluid and thoroughly flushing the line with a compatible solution (such as 0.9% sodium chloride) before and after administering the antibiotic.

Step-by-Step Solution

1
Identify the active intravenous solutions and the prescribed medication.
The client is receiving continuous Lactated Ringer's solution, and the newly prescribed medication is ceftriaxone.
Recognizing the components of the current parenteral therapy is the critical first step in ensuring safe medication delivery.
2
Evaluate the compatibility of the prescribed antibiotic with the infusing maintenance fluid.
Ceftriaxone is fundamentally incompatible with Lactated Ringer's because Lactated Ringer's contains calcium, which rapidly forms a precipitate when mixed with this specific antibiotic.
Preventing the mixture of incompatible intravenous fluids averts the formation of life-threatening crystal emboli and catheter occlusion.
3
Determine the safest method to administer the medication using the existing single-lumen catheter.
The nurse must create a physical barrier between the incompatible solutions by temporarily suspending the Lactated Ringer's and flushing the line meticulously with a compatible fluid (0.9% sodium chloride) before and after the antibiotic.
Sequential administration with thorough normal saline flushes ensures the two incompatible fluids never interact within the intravenous tubing.

Key Concept

Intravenous Compatibility and Safe Sequential Administration
Estimated Time:1m 15s
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Topics

Pharmacological and Parenteral Therapies

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