Patent ID: 8128598

Claim:
A system comprising: a guidewire unit that includes a pressure medium tube; and a return valve mounted in an interior of a tube end section of the pressure medium tube of the guidewire unit, wherein the return valve is operatively configured so that it opens in order to introduce a pressure medium into the pressure medium tube and closes in order to prevent the pressure medium from flowing out of the pressure medium tube; a pressure connection device with a connecting body operatively configured to accommodate the tube end section of the pressure medium tube of the guidewire unit, wherein the connecting body has a pressure medium-controlled tube holding element, which is operatively configured such that in a pressurized state the pressure medium-controlled tube holding element secures the tube end section in the connecting body in a fluid-tight manner, and in a pressure relieved state the pressure medium-controlled tube holding element releases the tube end section for detachment from the connecting body.