Apparatuses of the type broadly applicable to numerous medical applicationsin which it is desirable to insert one or more steerable or non-steerable cathetersor similar devices into a working channel of an associated device, such as an endoscope,catheter, etc., or passageway of a patient, are disclosed. The apparatuses mayinclude catheters (24) having a dedicated guide wire channel (60) and one or moreof the following: viewing capabilities, a working channel, and auxiliary channels(62, 64, 66), such as insufflation/irrigation channels. The catheters may includea guide wire channel that is configured to provide the catheter or other devicewith rapid exchange capabilities.
