A multilumen tracheal tube (12) or catheter is disclosed. The tube has aplurality of suction lumens (44) , each having a suction port (60) . Arotatable suction port collar (38) is provided. The suction port collar has aninlet (64) and an outlet (56) . The collar overlaps each suction port and iscapable of selectively occluding a number of the suction ports while enablingunimpeded passage between a remainder of the ports and the outlet.
