to instruments having rigid shafts various diagnostic procedures and devices are used to perform imaging studies mucus flow studies air gas flow studies anatomic dimension studies and endoscopic studies access and occluding devices may be used to facilitate insertion of working devices such asendoscopes wires probes needles catheters balloon catheters dilation catheters dilators balloons tissue cutting or remodeling devices suction or irrigation devices imaging devices sizing devices biopsy devices image guided devices containing sensors or transmitters electrosurgical devices energy emitting devices devices for injecting diagnostic or therapeutic agents devices for implanting devices such as stents substance eluting or delivering devices and implants etc application_number US 92646707 A description the following detailed description the accompanying drawings and the above set forth brief description of the drawings are intended to describe some but not necessarily all examples or embodiments of the invention the contents of this detailed description the accompanying drawings and the above set forth brief description of the drawings do not limit the scope of the invention in any way a number of the drawings in this patent application show anatomical structures of the ear nose and throat in general these anatomical structures are labeled with the following reference letters fig1 shows a schematic diagram of the general working environment of an example of a system for catheter based minimally invasive sinus surgery being used to perform a sinus surgery on a human patient the human patient is treated by a working device 10 working device 10 may be connected to one or more auxiliary devices located on a treatment tray 12 a c arm fluoroscope 14 provides fluoroscopic visualization of anatomical regions during the procedure an instrument console.