AN APPARATUS FOR ADVANCING AN OBJECT THROUGH A BODY PASSAGE

摘要

An intestinal probe comprises a bladder (15) and an axially expandable bellows (14) connected with said bladder and being designed such that it changes its dimensions reversibly in its axial direction dependent on the pressure in its interior, and a tube (10) provided with a lumen (11) for the supply and removal of inflation medium to the bladder (15) and bellows (14), the bladder (15) and the bellows (14) being interconnected through a throttling valve (17). The throttling valve (17) ensures that the inflation of the bladder (15) is delayed relative to the axial expansion of the bellows (14), and that the deflation of the bladder (15) is delayed relative to an axial contraction of the bellows (14), and so that the intestinal probe by using one lumen (11) only for inflation medium can be advanced stepwise through a gastro-intestinal canal.