IMPLANTED MEDICAL DEVICES FROM SHAPE-METAL ALLOY Russian patent published in 2003 - IPC

FIELD: implanted medicinal devices from shape-metal alloys. SUBSTANCE: medical device includes a part from shape-metal alloy which may be deformed from nondeformed first configuration assumed in austenitic state into deformed second configuration so that deformation transforms it into martensitic or partially martensitic state caused by mechanical stress with increase of A_s from its initial temperature A°s

to temperature when part from shape-metal alloy after transformation into said second configuration is heated to temperature exceeding , it transforms into at least partially austenitic state. In this case, transformation leads to change of configuration from deformed second configuration towards nondeformed first configuration and to reduction A_s from to A°s so that part of shape-metal alloy is stable in at least partial austenitic state at temperature of patient's body. Technical result of the invention consists in obtaining of bidirectional shape-memory effect that provides for easy removal or repeated location of medical device in patient's body. EFFECT: higher efficient using. 19 cl, 3 dwg, 2 tbl