Abstract: A catheter, probe or a similar device is intended to be inserted into a body cavity. The catheter (1) is double-walled over a substantial portion of its length, at which the inner wall (5) on the outside and/or the outer wall (6) on the inside is provided with longitudinal partitions for forming separate longitudinal passages (3) between the walls (5,6). The passages (3) are perforated from the outside of the catheter by a plurality of capillary holes (4). Into at least some of the passages (3) a fluid, i.e. compressed air or liquid, or a cream or gel-like substance, is intended to be inserted for obtaining a lubrication of the mucous membranes of the body cavity during the insertion. Thus, irritation of the mucous membranes of the body cavity is avoided during the insertion and longer insertion periods are permitted without risk of infection.

Abstract: A device for regulating the flow rate in the tube, e.g. in infusion- and transfusion assemblies. The flow rate can be regulated by twisting a portion of the tube by means of a twisting device. The tube comprises at least along the portion of its length which is intended to be twisted a plurality of separate or communicating flow passages. Between said flow passages there are provided distance members arranged about or forming an inner core in the tube about which the tube is twisted and which reduces compression of the tube. When the tube is twisted the free space between said distance members is gradually reduced in the twisted cross-section of the tube and by that a reduction of the flow area is obtained.