The scope of this standard is to establish a normative definition of communication between personal
telehealth International Normalized Ratio (INR) devices (agents) and managers (e.g. cell phones, personal
computers, personal health appliances, and set top boxes) in a manner that enables plug-and-play
interoperability. It leverages work done in other ISO/IEEE 11073 standards including existing terminology,
information profiles, application profile standards, and transport standards. It specifies the use of specific
term codes, formats, and behaviors in telehealth environments restricting optionality in base frameworks in
favor of interoperability. This standard defines a common core of functionality of INR devices.
In the context of personal health devices, INR monitoring refers to the measurement of the prothrombin
time (PT) that is used to assess the level of anticoagulant therapy and its presentation as the International
Normalized Ratio compared to the prothrombin time of normal blood plasma. Applications of the INR
monitor include the management of the therapeutic level of anticoagulant used in the treatment of a variety
of conditions.