| 摘要 |
<p>A calculus disintegrating apparatus comprises a first and second electrodes (28, 30) which are arranged at the distal end of a probe (26) inserted into a coeliac cavity, and discharge energy sources (10, 12, 16) connected to the first and second electrodes to impresses D.C. impulse voltage across them. The apparatus is designed to crush a calculus by impact wave resulting from spark discharges produced across the first and second electrodes. A polarity changing circuit (18, 20, 22, 24) is provided between the discharge energy sources (10, 12, 16) and first and second electrodes (28,30) to vary the polarity of the output D.C. impulse voltage from the discharge energy source.</p> |
