| 摘要 |
<p>A sensor in particular for a heart stimulator is arranged to measure or detect the bending of an electrode lead. A heart stimulator with a lead comprising such a sensor is also claimed. From the bending e.g. contraction movements of the heart muscle can be deducted. The sensor has two parallel channels (7) extending form the tip (1) of the lead inside the wall material of an isolating sleeve (3) enclosing the conductor element (5) of the lead. The channels (7) are filled with an electrically conductive medium. When the lead is subjected to bending movements, the resistance of the medium between the tip electrode (1) and inner connectors (9) will change owing to deformation of the originally straight, cylindrical channels (7). The resistance of the channel medium is sensed by a monitoring device. In addition, the two detector channels (7) are located at asymmetrical places of the lead, whereby also the orientation of the bending movements can be sensed by comparing the bending signals from the channels to each other. This provides more information on the contraction movements so that it can be possible to distinguish between different types of contraction movements, such as normal, stimulated or pathologic.</p> |
