A distal end of an introducer sheath into a patient's urethra is advanced into a patient's urethra while flowing an irrigation fluid through a lumen and out a distal end of the introducer sheath into the urethra. The irrigation fluid is simultaneously removed from the urethra through the distal end and lumen of the introducer sheath to establish a circulation of the irrigation fluid in the urethra as the introducer sheath is advanced. The urethra may then be viewed through an endoscope positioned in the lumen of the introducer sheath as the irrigation fluid circulation is continued. A unitary connector is detachably coupled to a proximal end of the elongated sleeve, and a fluid seal is disposed between the unitary connector and the proximal end of the elongated sleeve. The unitary connector is configured to connect the first and second channels to the inflow pump and the outflow pump, respectively.