A medical device introduction system and method can include a medical
introducer, a separate imaging device, and/or a separate working channel
device, each of which may be movable independent of the other. The
medical introducer can include a handle and an elongate introducer tube
extending from the handle and having a plurality of lumens, and may be
inserted into an interior body region of a patient. The separate imaging
device may be inserted through the handle and positioned in one of
lumens. The separate working channel device can include an elongate
working channel tube and a position controller. The working channel tube
can include at least one lumen defining a working channel. The position
controller can be configured to control positioning of the working
channel tube. The working channel device may be removably connected to
the handle and positioned in another lumen.