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Difficulty: Very hardPharmacological and Parenteral Therapies

A client receiving a continuous intravenous infusion of unfractionated heparin at 1,500 units/hr1,500\text{ units/hr} through a dedicated 20-gauge peripheral catheter suddenly reports a severe "thunderclap" headache and exhibits unequal pupils. The nurse immediately stops the infusion pump due to suspected intracranial hemorrhage. The healthcare provider prescribes stat intravenous protamine sulfate. What is the most critical action the nurse must take to safely utilize the existing vascular access for the antidote administration?

  1. Disconnect the continuous infusion tubing at the catheter hub, aspirate the residual volume, and flush with 0.9%0.9\% sodium chloride.Answer
  2. B
    Attach the antidote syringe to the Y-site port closest to the client and administer slowly over 10 minutes10\text{ minutes}.
  3. C
    Connect a new primary bag of 0.9%0.9\% sodium chloride to the existing tubing and program a rapid 15 mL15\text{ mL} flush.
  4. D
    Discontinue the current peripheral catheter immediately and initiate new vascular access in the opposite extremity.

Answer

The nurse must disconnect the primary tubing at the hub, aspirate to remove residual medication from the catheter, and flush with normal saline.
The client is experiencing a highly critical bleeding event (suspected intracranial hemorrhage). While the heparin pump has been stopped, the intravenous catheter itself (the "dead space") is still filled with concentrated heparin. To safely use this existing line for the antidote, the nurse must first disconnect the heparin tubing and use a syringe to aspirate the residual blood and medication directly from the catheter hub. Flushing with 0.9%0.9\% sodium chloride afterward ensures the line is clear and safe for protamine sulfate administration.

Step-by-Step Solution

1
Recognize the clinical emergency.
The client's severe headache and unequal pupils strongly suggest an intracranial hemorrhage, a life-threatening adverse effect of heparin.
Immediate cessation of the anticoagulant is required to prevent further bleeding.
2
Stop the infusion pump.
The continuous delivery of heparin is halted.
This is the first immediate action to limit further systemic anticoagulation.
3
Clear the intravenous catheter dead space.
The nurse disconnects the tubing, attaches a syringe directly to the hub, and aspirates a small amount of blood to remove residual heparin from the cannula.
Even though the pump is stopped, the catheter cannula inside the vein remains filled with highly concentrated heparin. Flushing without aspirating would inadvertently bolus this medication into the client.
4
Flush the line and administer the antidote.
The nurse flushes the cleared catheter with 0.9%0.9\% sodium chloride and slowly administers the prescribed protamine sulfate.
Ensures a patent, uncontaminated line for the safe delivery of the reversal agent without risking precipitation or an accidental heparin bolus.

Key Concept

Prevention of inadvertent medication bolus from intravenous dead space during critical medication reversals.
Estimated Time:1m 30s
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Topics

Pharmacological and Parenteral Therapies

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