Sheath and hub for imaging endoscope

A multi-channel hub of a compound sheath for encasing an endoscope during an endoscopic procedure, comprising:

• a connection port that is configured to couple to a proximal end of a parallel use channel of a compound sheath;
• a rinse port that couples to a fluid reservoir device that injects fluid;
• a withdrawal port that couples to a vacuum forming device that removes fluid;
• a tool port for receiving a catheter-based tool;
• a fluid channel sized and shaped to establish a fluid communication between the parallel use channel, the connection port, the rinse port and the withdrawal port, wherein fluid injected through the rinse port passes along the fluid channel through the connection port and into the parallel use channel, and fluid withdrawn through the withdrawal port passes from the parallel use channel through the connection port;
• a mechanical channel sized and shaped to pass therethrough a catheter-based tool, between the tool port and the connection port;
• and
• at least one switch for selecting which of the rinse port, withdrawal port, and tool port is in communication with the parallel use channel using the connection port;
• wherein the fluid channel and the mechanical channel both include the connection port;
• wherein the at least one switch is operated by rotation of a linking channel between the rinse port, withdrawal port, and tool port and the connection port.