#$%^&*AU2015252081B220170914.pdf#####-12ABSTRACT A medical device includes an insertion tube, having a distal end for insertion into a body of a subject and an opening at the distal end. A lumen, which includes a flexible tube which passes longitudinally through the insertion tube so as to 5 communicate with the opening at the distal end of the insertion tube, is secured under tension inside the insertion tube.