part_subject: "IMMUNOLOGY AND MICROBIOLOGY DEVICES"
subpart_code: "F"
subpart_subject: "Immunological Test Systems"
section_number: "866.5560"
section_subject: "Lactic dehydrogenase immunological test system."
cfr_reference: "21 CFR 866.5560"
title_name: "Title 21"
title_subject: "Food and Drugs"
parts_covered: "Parts 800 to 1299"
revised_date: "Revised as of April 1, 2019"
publication_date: "As of April 1, 2019"
contains_description: "Containing a codification of documents of general applicability and future effect"
publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"
---
(a)Identification. A lactic dehydrogenase immunological test system is a device that consists of the reagents used to measure by immunochemical techniques the activity of the lactic dehydrogenase enzyme in serum. Increased levels of lactic dehydrogenase are found in a variety of conditions, including megaloblastic anemia (decrease in the number of mature red blood cells), myocardial infarction (heart disease), and some forms of leukemia (cancer of the blood-forming organs). However, the diagnostic usefulness of this device is limited because of the many conditions known to cause increased lactic dehydrogenase levels.
(b)Classification. Class I (general controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to § 866.9.