K033775 is an FDA 510(k) clearance for the HEMOSIL LIQUID ANTITHROMBIN XL. Classified as Antithrombin Iii Quantitation (product code JBQ), Class II - Special Controls.
Submitted by Instrumentation Laboratory CO (Bedford, US). The FDA issued a Cleared decision on January 2, 2004 after a review of 30 days - a notably fast clearance cycle.
This device falls under the Hematology FDA review panel, regulated under 21 CFR 864.7060 - the FDA hematology device framework. As a Special 510(k), this submission covers a manufacturer modification to an existing cleared device rather than a new device introduction.
Device pattern: Iterative device modification. Low regulatory complexity profile. This Special 510(k) clearance confirms that the manufacturer's modifications remained within the established regulatory envelope of the original cleared device.