A steerable cavity creation device having a proximal and distal end, comprising: an outer shaft having a proximal end and a distal end, an inner tubing (504, 513) extending therethrough, a first hypotube (514 disposed within the inner tubing (504, 513), and a second hypotube disposed within the first hypotube; a deflectable zone on the distal end of the device, deflectable through an angular range, the deflectable zone having a proximal portion and a distal portion, wherein the first hypotube has a distal zone having a first plurality of slots, and the second hypotube has a distal zone having a second plurality of slots, wherein the first plurality of slots is oriented 180 degrees circumferentially apart from the second plurality of slots, wherein the device has a first longitudinal axis extending from the proximal end to the proximal portion of the deflectable zone, wherein the deflectable zone is movable from a first substantially straight configuration in an unstressed state to a second deflected configuration; a deflection controller on the proximal end of the device;, wherein the deflection controller is actuated by rotation about the first longitudinal axis of the tubular body, wherein upon rotation of the deflection controller a proximally directed force is exerted on a movable actuator attached to the second hypotube to actively change the curvature of the deflectable zone, wherein the first hypotube is held stationary when the movable actuator applied force to the second hypotube; an input port positioned distally on the device relative to the deflection controller; a cavity creating element carried by the deflectable zone, wherein the cavity creating element comprises a balloon having a balloon chamber, wherein the balloon has a proximal neck and a distal neck, wherein the proximal neck is attached to the distal end of the outer shaft and the distal end is attached to the inner tubing (504, 513), wherein the inner tubing is configured to seal the balloon chamber; and a distal tip positioned over the distal neck of the balloon and over a distal end of the first hypotube and a distal end of the second hypotube. an outer shaft having a proximal end and a distal end, an inner tubing (504, 513) extending therethrough, a first hypotube (514 disposed within the inner tubing (504, 513), and a second hypotube disposed within the first hypotube; a deflectable zone on the distal end of the device, deflectable through an angular range, the deflectable zone having a proximal portion and a distal portion, wherein the first hypotube has a distal zone having a first plurality of slots, and the second hypotube has a distal zone having a second plurality of slots, wherein the first plurality of slots is oriented 180 degrees circumferentially apart from the second plurality of slots, wherein the device has a first longitudinal axis extending from the proximal end to the proximal portion of the deflectable zone, wherein the deflectable zone is movable from a first substantially straight configuration in an unstressed state to a second deflected configuration; a deflection controller on the proximal end of the device;, wherein the deflection controller is actuated by rotation about the first longitudinal axis of the tubular body, wherein upon rotation of the deflection controller a proximally directed force is exerted on a movable actuator attached to the second hypotube to actively change the curvature of the deflectable zone, wherein the first hypotube is held stationary when the movable actuator applied force to the second hypotube; an input port positioned distally on the device relative to the deflection controller; a cavity creating element carried by the deflectable zone, wherein the cavity creating element comprises a balloon having a balloon chamber, wherein the balloon has a proximal neck and a distal neck, wherein the proximal neck is attached to the distal end of the outer shaft and the distal end is attached to the inner tubing (504, 513), wherein the inner tubing is configured to seal the balloon chamber; and a distal tip positioned over the distal neck of the balloon and over a distal end of the first hypotube and a distal end of the second hypotube.