Coagulation
Coagulation laboratory tests
Low molecular weight heparin (LMWH)

Author: Jeremy Parsons, M.D. (see Authors page)

Revised: 16 May 2016, last major update November 2012

Copyright: (c) 2002-2016, PathologyOutlines.com, Inc.

PubMed Search: Low molecular weight heparin (LMWH)

Table of Contents
Definition / General
Cite this page: Low molecular weight heparin (LMWH). PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/coagulationLMWH.html. Accessed December 3rd, 2016.
Definition / General
  • Recommended to monitor using chromogenic antifactor Xa assay on specimens obtained up to 4 hours after subcutaneous injection of LMWH (Chest 2001;119:64S)
  • Recommended to use different calibrations for LMWH and unfractionated heparin, and to establish calibration curves for each lot and type of LMWH
  • Don’t use PTT to monitor because LMWH doesn’t affect thrombin or factor IXa