MEDICAL DEVICE WHICH INCLUDES A BALLOON MODULE

The invention provides a medical device (10) for use within the human body, which includes a catheter tube (12) having a distal end and a proximal end, an inflation passage (30) defined within the catheter tube having an outlet (32), at least one balloon module (38) which has a first end (40) and a second end (42) which engage the catheter tube to envelop the outlet, and between which an outer wall (50), a closed perimeter (44), and an inner wall (52) is disposed to define an inflation enclosure (55), and a cavity (53) defined within the inner wall, wherein the balloon component is inflatable by inflow of an inflation fluid through the inlet into the inflation enclosure from a deflated state to an inflated state, wherein the balloon has at least one bond zone (54) within which the inner wall is bonded directly to the outer wall, and wherein, in the inflated state, the outer wall and at least part of the inner wall move radially outwardly relatively to the longitudinal axis of the catheter to cause expansion of the cavity and to radially space apart the closed perimeter from the longitudinal axis of the catheter.