A mixture containing mixture one or more amines, water, low-boilers and high-boilers, is fractioned in a process wherein. In use, cooling fluid can pass down one channel and return via the other channel. According to the invention, the inner gate region extends in the semiconductor substrate at least partially up to the blow-out contact and the blow-out contact is located on the drain end relative to the source region. On the other occasions, the sled drive signal supplier outputs the low-frequency component obtained by the LPF as the drive signal for the sled motor. In one embodiment, a method for cleaning endotracheal tubes comprises inserting a cleaning device within an endotracheal tube while a cleaning member is in a compressed position, radially expanding the cleaning member to an expanded position within the endotracheal tube, and withdrawing the cleaning device from the endotracheal tube with the cleaning member in the expanded position.