| 摘要 |
A device (1) for the positioning of implantable leads includes a base unit (3) and at least two, preferably detachable, leads (5, 7). The distal end (27, 35) of each lead (5, 7), which is introduced into the tissue (11) to be treated, has at least two longitudinally spaced apart electrode surfaces (37, 39, 41, 43) for applying current to the tissue. The base unit (3) has computing element (17), current generating element (50) for generating an alternating current, and conductivity determining element (854) for determining the tissue conductivity between pairs of electrode surfaces (37-41) based on the alternating current applied by the current generating element to the tissue. By comparing readings taken between appropriate pairs of electrode surfaces, the relative position of the leads can be determined by triangulation. Methods for using the device and leads for use in the device are also described.
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