A catheter includes a catheter shaft, an expandable member coupled to an outer surface of the catheter shaft, and a needle having a distal end portion disposed on an outer side of the catheter shaft adjacent the expandable member. The expandable member is selectively radially expandable from the radial perimeter of the catheter for making contact with a body lumen wall. The needle is configured to extend laterally from the outer side of the catheter shaft at a non-zero angle relative to the longitudinal axis of the catheter shaft. The needle contacts the expandable member during the selective radial expansion of the expandable member such that the non-zero angle of the extended needle is controlled by the expansion of the expandable member. The radial center of the expandable member can be eccentrically arranged with respect to a longitudinal axis of the catheter. The expandable member can include at least one opening for allowing bodily fluid or gas (e.g., air) to pass through when the expandable member is expanded in a body lumen.
