An apparatus for use in treating a blood vessel, the apparatus comprising:a heat application device adapted to receive power from a power source, the heat application device comprising a heating coil,a user interfacea temperature measuring devicea module in communication with said temperature measuring device and said user interface, said module configured to determine whether a temperature measured by said temperature measuring device satisfies a required initial temperature condition and said module configured to follow a safety procedure if said temperature measured by said temperature measuring device does not satisfy said required initial temperature conditionsaid module further configured to follow the safety procedure to interrupt a normal power-up process for the heating coil of the heat application device if said temperature measured by said temperature measuring device does not satisfy said required initial temperature condition
