A system and method for controlling access to data within a hierarchically organized document, such as an XML document. The controller can be configured to receive instructions, to report a notice level when the controller determines that data measured by the at least one sensor fails a report threshold test corresponding to a report threshold value. Each coolant flow lumen in thermal contact with the blood conveyance lumen and thermally insulated from each other and the exterior surfaces of the catheter shaft. A dielectric layer may be disposed on the first electrode layer. An apron assembly is attached to the bulkhead at the attachment mounts and is generally positioned above the drive train assembly and crash energy absorption assembly.