What is disclosed are medical devices comprising a rounded, thin-walled, expandable metal structure and a flexible, elongated delivery device and systems and methods of use for treating saccular vascular aneurysms with the medical devices. The apparatus uses the combination of an evaporative cooler with a water reservoir and a refrigerated air system with a water-cooled condenser. The pipeline is switched from a normal mode of operation to a correction mode of operation. A value is resolved for the setting. Arranging the rear facing portion in the open position is particularly advantageous for hauling oversized cargo articles which may extend from the rear of the vehicle.