Photo: Environmental Services Director Gordon Taylor, nurse Leslie Dalaly Infection Preventionist Angie Ghanem and Chief Medical Officer Stephanie Hall with a new Xenex ultraviolet robot.

It sounds like something straight out of science fiction: Robots zap danger surrounding them.

But for Keck Medical Center of USC, the new devices are powerful tools in the fight against the spread of disease and infection.

Xenex ultraviolet robots, which stand about five feet tall and emit pulses of ultraviolet light to render bacteria and viruses inactive, were recently deployed in Keck Hospital of USC and USC Norris Comprehensive Cancer Center.

Medical center officials said the new technology is an important tool to provide safe, sterile environments for patients and staff members.

“My passion is in reducing infection rates, especially for bacteria that are hard to manage,” said Chief Medical Officer Stephanie Hall, MD. “This provides a new level of disinfection that we could not normally achieve.”

Manufactured by San Antonio-based Xenex Disinfection Services, the robots are used by more than 300 U.S. hospitals.

Pathogens can pose significant health risks, and disinfection of hospital surfaces is crucial for patient safety. About 1 in 25 U.S. hospital patients have had a healthcare-associated infection, according to the Centers for Disease Control and Prevention.

Xenex robots use powerful pulses of Xenon-based ultraviolet light that penetrate cell walls of bacteria and viruses, making them no longer infectious. The UV-C light can kill pathogens such as Ebola, measles, VRE, c. difficile, MRSA and mold.

Purchase of a Xenex robot for Keck Hospital and USC Norris was made possible by gifts from Paula Hsu and her family in appreciation for the extraordinary care that her mother received.

“Our family is forever grateful to Dr. Stephanie Hall and especially Dr. Glen Ault for the care rendered to my mother at the hospital a few years ago,” Hsu said. “Today, at 94, she is well and sound. When Dr. Hall mentioned this new disinfecting equipment to us, we felt privileged to be able to show our gratitude by contributing.”

Staff members underwent training with the Xenex robot after it arrived Feb. 17 at Keck Hospital of USC.

“This enhances the level of disinfection we’re able to provide,” said Infection Preventionist Angie Ghanem.

A Xenex robot has been in use since December at the Center for Cystic Fibrosis. It was purchased with financial gifts from the Webb Foundation and Steven Tyre, CPA, trustee of the Bob and Margrit Gold Trust.

Although brief exposure to the light is considered safe, the robots are used in unoccupied rooms and are equipped with a motion detector capable of shutting down the system if motion is detected. The UV light cannot penetrate glass, doors or plastic, nor will it damage supplies or equipment in the room being disinfected.

The robots have a simple user interface, are WiFi compatible and dispatch real-time data. They will be used in addition to regular cleaning and will provide enhanced cleaning in targeted areas of patient units and procedure rooms. A Xenex robot takes about 15 minutes to disinfect a typical patient room.

Each device costs about $90,000.

A Xenex robot is used 18 times a day in the Cystic Fibrosis Clinic, and patients have been curious about the new machine roaming the halls with staff members.

“It has increased the sense of comfort in our patients,” said Center for Advanced Lung Disease Nurse Manager Debbie Benitez, RN. “They feel we are going above and beyond what we need to do for their safety.”

by Douglas Morino