| 摘要 |
<p>The electronic catheter displacement sensor comprises a displacement sensing roller and an idler roller between which a catheter can be advanced or retracted, means for sensing the rotation of the displacement sensing roller, means for determining the direction in which the displacement sensing roller is rotated, and means coupled to said rotation sensing means and to said direction sensing means for generating an output signal for transmission to a visual display device for displaying the distance the catheter has been advanced or retracted. The rollers can be mounted in a sensor unit separable from the displacement sensor and the sensor unit is preferably disposable.</p> |
