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Heparin Anticoagulant Therapy and Its Monitoring.

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Summary

This review covers unfractionated (UFH) and low-molecular-weight heparin (LMWH) uses, monitoring, and complications. It highlights needs for standardized ranges and improved monitoring in special populations.

Keywords:
LMWHanticoagulationenoxaparinheparinthrombosis

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Area of Science:

  • Pharmacology
  • Hematology
  • Clinical Medicine

Background:

  • Heparin is a critical parenteral anticoagulant in acute and chronic care.
  • Unfractionated heparin (UFH) and low-molecular-weight heparin (LMWH) are widely used.
  • Effective anticoagulation management requires understanding indications, dosing, and monitoring.

Purpose of the Study:

  • To provide a comprehensive review of UFH and LMWH clinical use.
  • To detail laboratory monitoring methods and potential pitfalls.
  • To discuss special population considerations and management of complications.

Main Methods:

  • Narrative review of clinical indications and dosing for UFH and LMWH.
  • Summary of laboratory monitoring techniques: activated partial thromboplastin time (APTT), anti-factor Xa (anti-Xa), activated clotting time (ACT), and viscoelastic testing (VET).
  • Discussion of common pitfalls, interferences, specific populations, and complications like heparin resistance, heparin-induced thrombocytopenia (HIT), and reversal strategies.

Main Results:

  • Clinical indications and dosing guidelines for UFH and LMWH are summarized.
  • Laboratory monitoring methods, their interpretation, and common interferences are detailed.
  • Considerations for specific patient groups and management of heparin-related complications are presented.

Conclusions:

  • Standardization of therapeutic ranges and mitigation of assay interference are crucial.
  • Further prospective evaluation of monitoring strategies is needed, especially in extracorporeal membrane oxygenation (ECMO), pregnancy, and cardiac surgery.
  • Optimizing heparin therapy requires a thorough understanding of its use, monitoring, and potential complications.