A system and methods for coordinating and displaying a short name of a drug are disclosed. The base has a catheter with a lumen for communication with a body lumen. The holding device detachably fastens a tensioning element, whose first end is connected to the airbag, and its second end is connected to the housing via the holding device when the first and second sections are connected. at the time of changing rotation speed of the spindle motor in multiple steps given by integral multiples of 1 or at the time of changing rotation speed when the optical pick-up moves in the radial direction of the optical disc.