A catheter for assisting recovery from dysphagia using electrodes for electrical stimulation of the larynx is insertable into a patient nasally and comprises a sleeve that receives a longitudinally movable feeding tube which can be fixed in position relative to the feeding tube by way of a two-part 36,38 retaining clip 34 with living hinge 40 which, when open allows longitudinal movement of the sleeve relative to the feeding tube and, when closed clamps the feeding tube between recesses 36b and ribs 38c to restrict longitudinal movement of the sleeve relative to the feeding tube. A deformable elastomer insert (38e, Fig 3) may be incorporated. Also disclosed is a seal between a sleeve and feeding tube, a sleeve construction of inner and outer layers, a method of manufacturing a catheter, and an insulated wire having two different layers of insulation.
