U.S. Air Force Staff Sgt. Erick Bartels uses an Alaris Medsystem III infusion pump to check the flow of liquid on lines of IV bags at Joint Base Andrews, Md., Aug. 15, 2011. Bartels is a biomedical equipment technician assigned to the Medical Logistics Flight of the 779th Medical Support Squadron. (U.S. Air Force photo/Val Gempis)

U.S. Air Force Staff Sgt. Erick Bartels uses an Alaris Medsystem III infusion pump to check the flow of liquid on lines of IV bags at Joint Base Andrews, Md., Aug. 15, 2011. Bartels is a biomedical equipment technician assigned to the Medical Logistics Flight of the 779th Medical Support Squadron. (U.S. Air Force photo/Val Gempis)