Sensitivity of three activated partial thromboplastin time reagents to coagulation factor deficiencies.

Abstract:

:Three activated partial thromboplastin time (APTT) reagent test systems, General Diagnostics Automated APTT, American Dade Actin FS, and Pacific Hemostasis (Thromboscreen KAPTT) reagent, containing different activators for the APTT assay, were evaluated for their precision and sensitivity to factor deficiencies in the intrinsic coagulation system. The data suggest that micronized silica and ellagic acid reagent systems were similar in sensitivity to Factor VIII, X, and XII deficiencies, whereas, the micronized kaolin reagent was significantly less sensitive to these deficiencies. Factor XI deficiency was detected equally well with the use of all three reagent systems. The ellagic acid reagent was somewhat more sensitive to Factor IX deficiency than the micronized silica reagent, and the micronized kaolin reagent was again least sensitive. Both the micronized silica and ellagic acid based reagents were insensitive to all but severe deficiencies in prekallikrein, whereas the micronized kaolin reagent was unable to detect this deficiency. All three reagents were insensitive to all but severe deficiencies in high-molecular-weight kininogen. The authors conclude that the reagent systems tested, containing micronized silica or ellagic acid as activators, are similar in sensitivity when used in a routine activated partial thromboplastin time to screen for factor deficiencies, whereas the reagent system containing micronized kaolin as an activator is less sensitive.

journal_name

Am J Clin Pathol

authors

Turi DC,Peerschke EI

doi

10.1093/ajcp/85.1.43

subject

Has Abstract

pub_date

1986-01-01 00:00:00

pages

43-9

issue

1

eissn

0002-9173

issn

1943-7722

journal_volume

85

pub_type

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