A cleaning catheter (200) insertable into a tracheal ventilation tube (160) and an input module (156) are provided for use with a suction source (601), the input module (156) coupled to the cleaning catheter (200) and including (i) an inflation module (330), including an inflation chamber (335) separate from the suction source (601)； (ii) a flow regulator (700), configured to assume first and second fluid-control states； and (iii) a mechanical user control element (320), which is configured (a) to mechanically and non- electrically set the fluid-control states, (b) to assume first and second configurations, and (c) to mechanically and non-electrically increase pressure in an interior of an inflation chamber (335) during a transition of the mechanical user control element (320) from the first configuration to the second configuration. The flow regulator (700), when in the first fluid-control state connects the suction source (601) and an interior of an inflatable element (588) of the cleaning catheter (200) in fluid communication to deflate the inflatable element (588).
