Closed suction system

Apparatus for use with a tracheal ventilation tube and a suction source, the apparatus comprising:

• (A) a cleaning catheter, which (a) is insertable into the ventilation tube, (b) is shaped so as to define one or more distal suction orifices, and (c) which comprises:
• (i) an elongate, flexible, tubular catheter main body;
• and
• (ii) an inflatable element, which is mounted to the catheter main body at a location within 3 cm of at least one of the one or more distal suction orifices;
• and
• (B) an input module, which is coupled to the cleaning catheter, and comprises:
• (i) an inflation module, which comprises an inflation chamber separate from the suction source;
• (ii) a flow regulator, which (a) is shaped so as to define a suction port coupleable in fluid communication with the suction source, and (b) is configured to assume at least first and second fluid-control states;
• and
• (iii) a mechanical user control element, which is configured (a) to mechanically and non-electrically set the fluid-control states of the flow regulator, (b) to assume at least first and second configurations, and (c) to mechanically and non-electrically increase pressure in an interior of the inflation chamber during at least a portion of a transition of the mechanical user control element from the first configuration to the second configuration, wherein the input module is arranged such that:
• at least when the mechanical user control element is in the first configuration, the flow regulator is in the first fluid-control state, in which the flow regulator (a) blocks fluid communication between the suction source and the distal suction orifices and (b) connects the suction source and an interior of the inflatable element in fluid communication to deflate the inflatable element, at least when the mechanical user control element is in the second configuration, the flow regulator is in the second fluid-control state, in which the flow regulator (a) connects the suction source and the distal suction orifices in fluid communication, (b) connects the interior of the inflation chamber and an interior of the inflatable element in fluid communication to inflate the inflatable element, and (c) does not connect the suction source and the interior of the inflatable element in fluid communication, and the flow regulator is (a) not in the first fluid-control state when the mechanical user control element is in the second configuration, and (b) not in the second fluid-control state when the mechanical user control element is in the first configuration.