ABSTRACT
Point of care assays for various analytes have been established in critical care,
including blood gas analysis, glucose, electrolytes, and markers for cardiac ischemia.
Coagulation assays can also be adapted to the critical care environment by using whole
blood as sample material and instruments optimized for point of care analysis. Available
assays include the conventional coagulation assays, such as prothrombin time and activated
partial thromboplastin time, fibrinogen, assays for monitoring of anticoagulant drugs,
global coagulation assays based on thrombelastography and viscosimetry, platelet function
assays, and D-dimer assays. The main problem in point of care coagulation diagnostics
is quality control. Point of care coagulation assays help in rapidly establishing
a diagnosis, clarifying causes of bleeding, and monitoring therapy. Thrombelastography
and similar assays extend the scope of coagulation diagnostics by visualizing the
process of clot formation and extending the observation period to provide an estimate
of clot stability versus mechanical and proteolytic attack.
KEYWORDS
Blood coagulation tests - critical care medicine - thrombelastography - D-dimer -
platelet function
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Carl-Erik DempfleM.D.
University Hospital of Mannheim, I. Department of Medicine
Theodor Kutzer Ufer 1-3, D-68167 Mannheim, Germany
Email: carl-erik.dempfle@med.ma.uni-heidelberg.de