A medical process and apparatus for repeatedly obtaining short term changes in the physiological functioning of an individual as an aid in diagnosing illness and malfunction, and determining longer term changes and "trends" that are, or may be, indicative of the onset of a developing adverse condition. The process involves repetitive testing of the individual at short term intervals and permanently recording the results of all tests, as well as comprehensive medical data about that individual, in the form of microrecordings on a small, credit card size medical record adapted to be continuously carried by the individual. The extensive compilation of test data and medical data is reviewed and compared at longer term intervals to reveal changes and "trends" in process of development. A similar process is employed for determining changes and "trends" in the degree of physical fitness or conditioning. Apparatus for practicing the processes can include multiphasic diagnostic equipments that perform the numerous tests at frequent intervals, and at lower cost, with reduced need for attending physicians or other medical specialists. The medical history card is intended to be always in the possession and under control of the individual to which it relates, and is always available in the event of an emergency requiring medical assistance.
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