A compound sheath for encasing an endoscope during an endoscopic procedure, comprising: an endoscopic channel arranged as a first elongated lumen sized for accepting an elongated endoscopic imaging device; a parallel use channel arranged as a second elongated lumen sized for accepting a catheter-based tool, the walls of the parallel use channel arranged for flow of fluid through the parallel use channel; wherein the endoscopic channel and the parallel use channel are arranged parallel to each other along a longitudinal axis of the compound sheath; and a multi-channel hub (114, 614) including: a connection port (116, 616) that couples to a proximal end of the parallel use channel; a rinse port (118A, 618A) that couples to a fluid reservoir device that injects fluid; a withdrawal port (118B, 618B) that couples to a vacuum forming device that removes fluid; and a tool port (118C, 618C) for passing a catheter-based tool; wherein the multi-channel hub establishes: a fluid channel for fluid communication between the parallel use channel and the rinse port (118A, 618A) or the withdrawal port (118B, 618B); and a mechanical channel for passing therethrough a catheter-based tool, between the parallel use channel and the tool port, such that the catheter-based tool and one of: 1) fluid entering the rinse port (118A, 618A), and 2) fluid drawn from the withdrawal port (118B, 618B), are simultaneously passing along the parallel use channel, wherein the multi-channel hub further comprises a 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, characterised in that: the switch of the multi-channel hub is operated by rotation of a linking channel between the connection port and one of the rinse port, withdrawal port and tool port. an endoscopic channel arranged as a first elongated lumen sized for accepting an elongated endoscopic imaging device; a parallel use channel arranged as a second elongated lumen sized for accepting a catheter-based tool, the walls of the parallel use channel arranged for flow of fluid through the parallel use channel; wherein the endoscopic channel and the parallel use channel are arranged parallel to each other along a longitudinal axis of the compound sheath; and a multi-channel hub (114, 614) including: a connection port (116, 616) that couples to a proximal end of the parallel use channel; a rinse port (118A, 618A) that couples to a fluid reservoir device that injects fluid; a withdrawal port (118B, 618B) that couples to a vacuum forming device that removes fluid; and a tool port (118C, 618C) for passing a catheter-based tool; wherein the multi-channel hub establishes: a fluid channel for fluid communication between the parallel use channel and the rinse port (118A, 618A) or the withdrawal port (118B, 618B); and a mechanical channel for passing therethrough a catheter-based tool, between the parallel use channel and the tool port, such that the catheter-based tool and one of: 1) fluid entering the rinse port (118A, 618A), and 2) fluid drawn from the withdrawal port (118B, 618B), are simultaneously passing along the parallel use channel, wherein the multi-channel hub further comprises a 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, characterised in that: the switch of the multi-channel hub is operated by rotation of a linking channel between the connection port and one of the rinse port, withdrawal port and tool port. a connection port (116, 616) that couples to a proximal end of the parallel use channel; a rinse port (118A, 618A) that couples to a fluid reservoir device that injects fluid; a withdrawal port (118B, 618B) that couples to a vacuum forming device that removes fluid; and a tool port (118C, 618C) for passing a catheter-based tool; wherein the multi-channel hub establishes: a fluid channel for fluid communication between the parallel use channel and the rinse port (118A, 618A) or the withdrawal port (118B, 618B); and a mechanical channel for passing therethrough a catheter-based tool, between the parallel use channel and the tool port, a fluid channel for fluid communication between the parallel use channel and the rinse port (118A, 618A) or the withdrawal port (118B, 618B); and a mechanical channel for passing therethrough a catheter-based tool, between the parallel use channel and the tool port, such that the catheter-based tool and one of: 1) fluid entering the rinse port (118A, 618A), and 2) fluid drawn from the withdrawal port (118B, 618B), 1) fluid entering the rinse port (118A, 618A), and 2) fluid drawn from the withdrawal port (118B, 618B), are simultaneously passing along the parallel use channel, wherein the multi-channel hub further comprises a 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, characterised in that: the switch of the multi-channel hub is operated by rotation of a linking channel between the connection port and one of the rinse port, withdrawal port and tool port.