Trans-urethral needle ablation surgical instrument

摘要

A guiding tube unit is slidable in the lumen of the sheath. A needle electrode is slidable in the lumen in the guiding tube unit. An insulating casing surrounds the needle electrode so that the distal end of the latter lies free. A handle for manual operation is provided at the proximal end of the sheath. A lever is held by the handle so that the distal end of the guiding tube unit can be bent at an angle w.r.t. the length axis. This action allows the lumen to be directed in the guiding tube unit towards the wall of the urinary tract. The handle carries a control coupled to the needle electrode and insulating casing to allow the electrode tube moved forwards and retracted w.r.t. the guiding tube unit. The electrode can reach the tissue of the prostrate gland via the wall of the urinary tract to build a lesion in the gland.