Semin Thromb Hemost 2014; 40(02): 186-194
DOI: 10.1055/s-0033-1364186
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Validation of Hemostasis and Coagulation Assays: Recommendations and Guidelines

Richard A. Marlar
1   Department of Pathology and Laboratory Medicine, Oklahoma City VA Medical Center, Oklahoma City, Oklahoma
2   Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
,
Jana N. Gausman
1   Department of Pathology and Laboratory Medicine, Oklahoma City VA Medical Center, Oklahoma City, Oklahoma
,
James W. Engel
1   Department of Pathology and Laboratory Medicine, Oklahoma City VA Medical Center, Oklahoma City, Oklahoma
› Author Affiliations
Further Information

Publication History

Publication Date:
04 February 2014 (online)

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Abstract

The clinical hemostasis laboratory is a complex testing arena which employs numerous coagulation assays and spans several different test methodologies. Adding further complexity, these test results are expressed in a wide variety of unique units (concentration, activity, time, percentage, and ratio). Unfortunately, many of these reference values are derived from a local plasma pool or manufacturer's standards, as there are few established international standards. These three main issues complicate the validation and performance of the coagulation testing. Before an assay can be introduced into clinical use, both analytical and clinical performance parameters must be validated or verified using the standard validation procedures of the laboratory. This article summarizes the initial evaluation and validation processes of the coagulation laboratory, which sometimes can be difficult concepts to implement. A standardized validation protocol is described in this article and, if used, will help to objectively evaluate the assay performance and determine if it meets acceptable laboratory criteria.