217Regulating Medical Devices, IVDs, Diagnostics and Laboratory Tests
BookID 185346_ChapID 13_Proof# 1 - 21/08/2009
are also Medical Devices, and are more readily understood to be medical devices.
In-vitro diagnostic products such as: general purpose lab equipment, reagents, and
test kits, which include monoclonal antibody technology, are considered to be
Medical Devices by the FDA. In addition, some laboratory testing services that use
certain reagents are considered Medical Devices.
Laboratory testing services that produce reports based upon multianalytes and
interpreted by complex algorithms are now considered to be Medical Devices, and
the FDA has recently established a new class of products termed, In Vitro Diagnostic
Multianalyte Index Assay (IVDMIA). These are now a subcategory of tests that
were previously known as “home-brew” or “analyte-specific reagents (ASR).”
There is still great uncertainty regarding how these tests will be phased into FDA
regulations since they are services, rather than tests kits or consumables, and these
tests are currently regulated by CLIA. It will be quite challenging to harmonize
additional regulatory requirements from the FDA because IVDMIAs already have
existing CMS regulatory and state licensure requirements.
Medical Device Classification
Once it is determined that a product is a “Medical Device” as defined by the FDA, the
next step is to determine the classification in which the medical device belongs. There
are three classifications possible for a medical device, and all products will fall into
one of these. You guessed it – the Classifications are Class I, Class II, and Class III. Each
of these three classifications has certain requirements for regulatory compliance, and
they have to do with the safety and type of controls placed on each classification.
1. Class I devices. Devices for which general controls of the Act are sufficient to
provide reasonable assurances of their safety and effectiveness. They present
minimal potential for harm to the user and the person being tested. Most Class I
devices are exempt from premarket notification.
2. Class II devices. Devices for which general controls alone are insufficient to
provide reasonable assurances of their safety and effectiveness, and for which
establishment of special controls can provide such assurances. Special Controls
may include special labeling, mandatory performance standards, risk mitigation
measures identified in guidance, and postmarket surveillance.
3. Class III devices. Devices for which insufficient information exists to provide
reasonable assurance of safety and effectiveness through general or special con-
trols. Class III devices are usually those that support or sustain human life, are of
substantial importance in preventing impairment of human health, or are devices
which present a potential, unreasonable risk of illness or injury.
The Regulation of medical devices is handled by the Office of Device Evaluation
(ODE) which has five divisions:
Division of Cardiovascular Devices•
Division of Reproductive, Abdominal, and Radiological Devices•