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Difficulty: HardPharmacological and Parenteral Therapies

A client admitted with severe sepsis is receiving a continuous intravenous (IV) infusion of piperacillin/tazobactam through a peripheral IV catheter. The healthcare provider prescribes a scheduled dose of IV vancomycin 1,500 mg1,500\text{ mg}. The pharmacy dispenses the vancomycin in a 300 mL300\text{ mL} bag of 0.9%0.9\% sodium chloride. Institutional protocol requires vancomycin doses greater than 1,000 mg1,000\text{ mg} to be infused over a minimum of 90 minutes90\text{ minutes} to prevent adverse infusion reactions. The client has only one patent peripheral IV line. Which of the following is the most appropriate nursing action?

  1. Pause the piperacillin/tazobactam infusion, flush the IV line thoroughly with 0.9%0.9\% sodium chloride, and infuse the vancomycin using a pump set at 200 mL/hr200\text{ mL/hr}.Answer
  2. B
    Connect the vancomycin tubing as a secondary piggyback to the most proximal Y-site on the piperacillin/tazobactam line and infuse at 200 mL/hr200\text{ mL/hr}.
  3. C
    Pause the piperacillin/tazobactam infusion, flush the line with 0.9%0.9\% sodium chloride, and set the vancomycin infusion pump to 300 mL/hr300\text{ mL/hr}.
  4. D
    Withhold the vancomycin dose and notify the provider to request a prescription for oral vancomycin to avoid interrupting the continuous antibiotic infusion.

Answer

The correct action is to pause the primary continuous infusion of piperacillin/tazobactam, thoroughly flush the line with normal saline, infuse the vancomycin at the correctly calculated rate of 200 mL/hr200\text{ mL/hr}, and then flush again before restarting the primary infusion.
Piperacillin/tazobactam and vancomycin are physically incompatible and will form a precipitate if mixed in the same IV tubing. Because the client only has one peripheral access site, the nurse must use the stop-flush-administer-flush-restart method to ensure the medications never come into contact. Additionally, the nurse must correctly calculate the infusion rate to meet the 90-minute protocol. To administer a 300 mL300\text{ mL} volume over 90 minutes90\text{ minutes} (1.5 hours1.5\text{ hours}), the pump must be set to 200 mL/hr200\text{ mL/hr} (300÷1.5=200300 \div 1.5 = 200). This ensures the vancomycin is given safely and prevents vancomycin flushing syndrome (previously known as Red Man syndrome).

Step-by-Step Solution

1
Evaluate the compatibility of the prescribed intravenous medications.
Vancomycin and piperacillin/tazobactam are physically incompatible at the Y-site.
When mixed, these two medications form a visible precipitate that can occlude the catheter or cause a fatal embolus, meaning they cannot run concurrently.
2
Determine the proper administration technique for a single IV line.
The nurse must use the stop-flush-administer-flush-restart sequence.
Flushing the line with a neutral compatible fluid (like 0.9%0.9\% sodium chloride) before and after the secondary medication prevents the incompatible drugs from ever coming into contact.
3
Calculate the correct infusion pump rate in mL/hr.
The pump should be set to 200 mL/hr200\text{ mL/hr}.
The formula is Total VolumeTime in hours\frac{\text{Total Volume}}{\text{Time in hours}}. Converting 90 minutes90\text{ minutes} to 1.5 hours1.5\text{ hours}: 300 mL1.5 hours=200 mL/hr\frac{300\text{ mL}}{1.5\text{ hours}} = 200\text{ mL/hr}.

Key Concept

IV Medication Incompatibility Management and Infusion Rate Calculation
Estimated Time:1m 30s
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Topics

Pharmacological and Parenteral Therapies

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