(EN)
The inventive application device for applying a high-frequency current for thermally obliterating body tissue comprises: an electrode needle (1) having an electrically conductive shank (3); at least one insulating sheath body (7), which surrounds the electrically conductive shank (3), can be displaced relative to the shank (3), and which is provided with a distal end, out of which the shank (3) can be extended, and; at least one trocar (5) that has a section provided for inserting into body tissue, a section (11) provided for remaining outside of the body tissue, and a lumen, which extends through both sections and through which the shank (3) of the electrode needle (1) can be guided through the trocar (5). The inventive application device is characterized in that the section of the trocar (5) provided for inserting into body tissue is designed so that it is electrically insulating and forms the sheath body (7) for the shank (3) of the electrode needle (1) particularly when the electrode needle or shank (3) thereof is guided through the lumen. The trocar (5) accomplishes two functions. Firstly, it accomplishes the traditional duties of a trocar (5), namely enabling the precise administration of medicaments or the taking of tissue samples as well as the insertion of electrode needles (1), without having to re-puncture each time. Secondly, the portion of the trocar (5) located inside the body serves as an insulating sheath body (7), which can be displaced relative to the shank (3) of the electrode needle (1) and which is provided for adjusting the length of the active area of the shank (3), i.e. of the area that projects out of the insulating sheath body (7), and is in electrically conductive contact with the body tissue when the electrode needle (1) is inserted into the body.
(ZH) 根据本发明的施加装置，用于施加高频电流以使体部组织热闭合，该施加装置包含：一个电极针(1)，具有一个导电杆(3)；至少一个围绕导电杆且相对于杆可移动的绝缘包壳体(7)，其具有一个远端，从该远端可抽出杆；以及至少一个套针(5)，具有：为导入到体部组织内而设置的分段，为保留在体部组织外而设置的分段(11)，以及穿过这两个分段延伸的内腔，通过该内腔将电极针的杆穿过套针贯通，套针的为导入到体部组织内而设置的分段电绝缘形成，并形成为电极针的杆用的包壳体，套针的内腔比电极针的杆短，并具有开口近端和开口远端，从而允许杆的远端插入套针的内腔中，并且当完全插入时，杆的远端超出内腔的开口远端。
