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A nurse is caring for a client receiving a continuous heparin infusion whose aPTT is 92 seconds. Which action should the nurse take first?
- Continue the infusion at the current rate
- Stop the infusion and notify the provider
- Recheck the aPTT in 4 hours
- Administer vitamin K
An aPTT of 92 seconds is well above the therapeutic range (≈46–70s), so bleeding risk is high — the priority is to stop the infusion and notify the provider. The heparin antidote is protamine sulfate; vitamin K reverses warfarin.
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