Systems and methods for treating stenosis along biliary and/or pancreatic tract

Systems and methods for treating stenosis, e.g., along the biliary and/or pancreatic tract, are disclosed. An example system may include a handle (14) having a base, a first carriage (26) translatable relative to the base, and a second carriage (24) translatable relative to the base. A sheath (16) may be coupled to the first carriage. The system may also include a catheter shaft (12) having a proximal end region and a steerable distal end region. The proximal end region may be coupled to the second carriage. A needle may be releasably coupled to the handle. The needle may be configured to pass through tissue to a location along the biliary and/or pancreatic tract. The system may also include a steering member (44) having a first end coupled to the steerable distal end region of the catheter shaft and a second end disposed adjacent the handle. 本发明公开了用于治疗例如，沿着胆道和/或胰道的狭窄的系统和方法。一种示例系统可以包括手柄(14)，其具有基座、可相对于所述基座平移的第一滑架(26)，以及可相对于所述基座平移的第二滑架(24)。护套(16)可以联接到所述第一滑架。所述系统还可以包括导管轴(12)，其具有近端区域和可转向的远端区域。所述近端区域可以联接到所述第二滑架。针可