The device comprises a distal flexible bladder 1 and a proximal section having a connecting member 2 joining the distal bladder in a liquid-tight system. A treatment liquid inside the system flows between the distal bladder and proximal section allowing the bladder to deflate when the treatment liquid is moved out. A pressurizing mechanism applies variable pressure to the proximal section to initiate liquid flow. A heater element is controlled to heat the treatment liquid in the proximal section. A pressure sensor 8 detects a pressure level for the treatment liquid within the liquid-tight system. A controller is operably connected to the pressurizing mechanism, the heater and the pressure sensor to control treatment. Changes in pressure values detect an anomalous condition. The proximal section comprises a syringe 3 with a syringe chamber having a heater which collapses as the syringe plunger is operated.
