A catheter comprising a tube member having an open and a closed end (7) and either a head (8) at the tube member closed end, having a diameter greater than the tube outer diameter and/or a circumferential neck (12) adjacent the tube member closed end, the neck outer diameter being less than the tube outer diameter and greater than the tube outer diameter. In alternative embodiments, the closed tube end my have one or more dimples disposed on the tube surface, of a depth less than the tube wall thickness one or more projections disposed on the tube surface or more flute portions disposed on the tube surface, of a depth less than the tube wall thickness. One or more fluid apertures (9, 10) are disposed in the tube member, in or adjacent the closed end, neck, dimples, projections or fluted portions.
