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Nomenclature changes to part 864 appear at 73 FR 35341, June 23, 2008.
(a) Identification. A partial thromboplastin time test is a device used for primary screening for coagulation abnormalities, for evaluation of the effect of therapy on procoagulant disorders, and as an assay for coagulation factor deficiencies of the intrinsic coagulation pathway.
(b) Classification. Class II (performance standards).
[45 FR 60629, Sept. 12, 1980]