The present application relates to a catheter with a balloon. The catheter (1) comprises an elongated member (2) having a proximal end (4) and a distal end (3). An inflatable balloon (5) is arranged on said elongated member (2) in an area of the distal end (3) thereof, the balloon (5) extending form a distal position (6) to a proximal position (7). The elongated member (2) comprises an inner lumen (8) extending from the distal end (3) to an end position (9) which is proximal to the balloon (5). The inner lumen (8) is open at the distal end (3). The catheter (1) further comprises a duct (12) connected to the proximal end (4) and to the balloon (5) at the proximal position (7), said duct (12) defining a separate lumen to convey a fluid to and from the balloon (5).
