How the Hemostasis Laboratory Can Help Clinicians to Manage Patients on Oral Anticoagulants

Area of Science:

• Cardiovascular Medicine
• Clinical Pathology
• Pharmacology

Background:

• Oral anticoagulants are essential for managing cardiovascular diseases, stroke, and thromboembolism.
• Two main classes exist: vitamin K antagonists (VKAs) and direct oral anticoagulants (DOACs).
• Effective patient management relies on laboratory monitoring.

Purpose of the Study:

• To provide an overview of the hemostasis laboratory's role in managing patients on oral anticoagulants.
• To highlight the importance of the international normalized ratio (INR) for VKA management.
• To discuss the evolving role of laboratory testing for DOAC concentrations and potential interferences.

Main Methods:

• Review of current clinical practices and laboratory testing for oral anticoagulants.
• Discussion of the utility of the international normalized ratio (INR) for vitamin K antagonist (VKA) monitoring.
• Exploration of direct oral anticoagulant (DOAC) concentration measurement and associated hemostatic parameter interferences.

Main Results:

• The hemostasis laboratory is crucial for both VKA dose adjustment (via INR) and DOAC concentration measurement in specific clinical scenarios.
• Understanding DOAC interferences with common hemostatic assays is critical but not widely appreciated.
• Laboratory guidance is essential for optimizing anticoagulant therapy and patient safety.

Conclusions:

• The hemostasis laboratory plays an indispensable role in the safe and effective management of patients on oral anticoagulants.
• Further research and standardization are needed to define the laboratory's role in DOAC monitoring and interference detection.
• Clinicians should leverage laboratory expertise for personalized anticoagulant therapy decisions.