Medical device, system and associated methods

A medical system, comprising:

• a guiding catheter having an inner lumen;
• and
• a medical device disposed within the inner lumen of the guiding catheter, the medical device including:
• a first tube having a first lumen;
• and
• a second tube having a second lumen, wherein an outer peripheral surface of the first tube and an outer peripheral surface of the second tube are joined to form a recess therebetween,
• wherein the recess forms a channel between an outer surface of the medical device and an inner wall of the guiding catheter.

A method of performing a medical procedure, comprising:

• inserting a guiding catheter having an inner lumen into a biological lumen;
• advancing a medical device through the inner lumen of the guiding catheter, the medical device including a first tube and a second tube having their outer peripheral surfaces joined, wherein a cross-sectional profile of the medical device defines at least one recess;
• and
• advancing an auxiliary device through the inner lumen of the guiding catheter, wherein the auxiliary device is positioned at least partially within the recess of the medical device.