Pharmacological and Parenteral TherapiesQuestion 507 of 2368

A client has a continuous intravenous heparin infusion. Which laboratory test does the nurse use to guide the dose adjustments?

  1. Partial thromboplastin time
  2. International normalized ratio
  3. Serum creatinine
  4. Hemoglobin A1c
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Correct answer: Partial thromboplastin time

Weight-based IV heparin protocols are titrated to the partial thromboplastin time (PTT).

Source: Nursing Pharmacology, 2nd edition (Open RN, Chippewa Valley Technical College, 2023), Cardiovascular & Renal Systems: Heparin Sodium. Licensed under CC BY 4.0.

Practice the topic "Pharmacological and Parenteral Therapies"

Questions last reviewed: 18 October 2026