A medical sphincterotome and a method of its use are described. The sphincterotome has structural elements that are capable of directing a wire guide through a selected body passageway. One structural element includes a distal port and deflection member that can deflect the wire guide into the desired passageway. Another structural element includes an offset nose-shaped end that can bend towards a passageway desired to be blocked. The wire guide is prevented from entering the blocked passageway, thereby enabling the wire guide to cannulate the desired passageway. The sphincterotome also includes a cutting wire to access a patients sphincter and perform various other medical procedures.
