Section 864.7290 - Factor deficiency test(a)Identification. A factor deficiency test is a device used to diagnose specific coagulation defects, to monitor certain types of therapy, to detect coagulation inhibitors, and to detect a carrier state (a person carrying both a recessive gene for a coagulation factor deficiency such as hemophilia and the corresponding normal gene).(b)Classification. Class II (performance standards).45 FR 60613, Sept. 12, 1980