CFR > Title 21 - Food and Drugs > CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER H—MEDICAL DEVICES (parts 800 to 898) > PART 864—HEMATOLOGY AND PATHOLOGY DEVICES > SUBPART H—Hematology Kits and Packages (§864.7040 to §864.7925) > 864.7750—Prothrombin time test.

864.7750—Prothrombin time test.

(a) Identification. A prothrombin time test is a device used as a general screening procedure for the detection of possible clotting factor deficiencies in the extrinsic coagulation pathway, which involves the reaction between coagulation factors III and VII, and to monitor patients receiving coumarin therapy (the administration of one of the coumarin anticoagulants in the treatment of venous thrombosis or pulmonary embolism).
(b) Classification. Class II (performance standards).

Code of Federal Regulations

[45 FR 60626, Sept. 12, 1980]