| 摘要 |
An electrocautery probe (112) includes a distal loop electrode (122) mounted between a pair of arms (123, 125) which are joined at their proximal ends to an electrode lead (127), and a mounting sleeve (129) for slidable coupling t he probe to the guide tube (14) of a resectoscope (10). The loop electrode is formed with a relatively broad lower surface defining a sharp distal edge (122a) and a sharp proximal edge (122b). The electrode may have a triangular cross section or a cross section which is defined by an upper convex surface and a lower flat surface. Tests have demonstrated that the electrode accordi ng to the invention is approximately 90 % more effective in coagulation than th e known loop electrodes. It is believed that the sharp distal and proximal edg es aid in cutting and focus cautery current to this effect while the relatively broad base serves to enhance coagulation.
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