Laparoscopic instrument for the application of endoligatures.

摘要

The invention relates to a laparoscopic instrument for looping hollow vessels and for applying endoligatures in the abdominal cavity. The instrument has an instrument tube (4), which can be introduced through a trocar cannula into the abdominal cavity. Within the instrument tube (4) is provided a spiral spring element (8), which is kept there in the unrolled state and can be slid out of the front end of the instrument tube by means of a slide mechanism (6). The spiral spring element (8) is dimensioned in such a way that it forms a winding in the load-free state. To the front end of the spiral spring element can be attached a ligature strip, which is passively carried along by the spiral spring element during the sliding out of the latter and consequently loops a structure upstream of the instrument tube. The front end of the ligature binder (10) can be gripped by means of a gripping tool (16) and can be retracted into the instrument tube for closing purposes or secured and closed in some other way. In a particularly preferred embodiment the spiral spring element is produced from a strip of superelastic material, such as nickel-titanium alloys. <IMAGE>