GHTF Medical Device Classification 

The Global Harmonization Task Force (GHTF) was an international organization comprised of regulatory authorities and industry representatives from various countries, established to promote harmonization of medical device regulations worldwide. 

The GHTF has been succeeded by the International Medical Device Regulators Forum (IMDRF), which continues its work toward regulatory harmonization. The GHTF developed several guidance documents, including those related to medical device classification.

These documents aimed to provide guidance to regulatory authorities and industry stakeholders on harmonized approaches to classifying medical devices. 

The classification of medical devices into these classes was based on factors such as the intended use, duration of contact with the body, and potential risks associated with the device.