Sunrise Hospital & Medical Center in Las Vegas resembled a war zone with "blood just soaking the hallways," according to medical personnel dealing with the aftermath of the mass shooting that killed more than 50 and injured more than 500.
Robert Smith, a cardiovascular technician at the University Medical Center of Southern Nevada, could tell it was bad even before he reached the emergency room, according to an article on the Guardian website.
“Blood on the ground in the car park – trails of blood about 20ft from the entrance. That’s where they were dropping off the people.”
Staff train to handle disasters and mass casualties. Even so, the scale and intensity of the influx on Sunday and Monday stretched them to the limit. Beds, gurneys and wheelchairs swiftly filled, staff had to raid other departments for additional IV tubing, blood pressure cuffs and blankets, and still patients kept coming, the article said.
Ventilation and Filtering for Infection Control 
ChristianaCare Opens Aston Campus Neighborhood Hospital
Stantec Breaks Ground on New Academic Medical Center in Miami
Building Senior Living for the Next Generation of Retirees
Managing Drain and Biofilm Risk