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Telemedicine is the use of telecommunication and information technologies in order to provide clinical health care at a distance.

It helps eliminate distance barriers and can improve access to medical services that would often not be consistently

available in distant rural communities. It is also used to save lives in critical care and emergency situations.
Although there were distant precursors to telemedicine, it is essentially a product of 20th century telecommunication

and information technologies. These technologies permit communications between patient and medical staff with both

convenience and fidelity, as well as the transmission of medical, imaging and health informatics data from one site to another.
Early forms of telemedicine achieved with telephone and radio have been supplemented with videotelephony, advanced

diagnostic methods supported by distributed client/server applications, and additionally with telemedical devices to support

in-home care.