A technique involves collecting formation fluids through a single packer having a plurality of sample collectors disposed along an expandable packer element. The bone resection guide provides a guiding instrument that allows a surgeon to remove only bone that needs to be removed for precise placement of the end prosthesis. On the display, the size of the first auxiliary icon is greater than the object icon and a second auxiliary icon corresponds to a second detection area, with the size of the second auxiliary icon greater than that of the object icon. A means for controlling the movement of the components can be programmed to move the components in response to, or independently of, the actions of a user of the device.