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At UCSF Medical Center, robot-aided healthcare is here

Matt Weinberger | Feb. 2, 2015
When the brand-new UCSF Medical Center at Mission Bay in San Francisco opens on Sunday, patients will be greeted by staffers that more strongly resemble R2-D2 than the cast of Scrubs.

When the brand-new UCSF Medical Center at Mission Bay in San Francisco opens on Sunday, patients will be greeted by staffers that more strongly resemble R2-D2 than the cast of Scrubs

Twenty-five Aethon "Tug" robots, comprising the largest fleet of free-roaming hospital robots in the world, will haul blood samples, food, medication, biohazardous waste and other materials and supplies around the huge, horizontal facility (about as big as three football fields). The Tugs are designed to reduce workplace injuries among hospital staff even as they let caregivers focus on, well, giving care.

Hospital officials offered some face time with the medical bots at a grand opening press conference Thursday featuring San Francisco Mayor Ed Lee, storied Silicon Valley venture capitalist Ron Conway and Salesforce CEO Marc Benioff. 

"Our neighbors in San Francisco and Silicon Valley have shown us how information technology can empower people in so many areas of their day-to-day lives," said Dr. Seth Bokser, UCSF Medical Center's clinical informaticist and Medical Director of IT. "At UCSF Mission Bay, we have partnered with local and international innovators to build leading-edge, patient-facing technology that empowers our families for their health."

UCSF said that hospitals have workforce injury rates four times the average in private industry, largely because humans are expected to lug very heavy things (like hundreds and hundreds of pounds of soiled bedsheets) very long distances. In that way, making the Tugs run these marathons 24/7 is easier on the people who work there, even as a reliance on robots frees up hospital staff for menial tasks. 

The robots work largely around the clock, though two of them get nights off at a time. They're keyed to be able to open doors, call elevators and roam around the hospital  by themselves, requiring human intervention only if they manage to get stuck. On any given day, UCSF Medical Center's computer simulations estimate that a Tug robot will traverse 12 miles, or about 300 miles a day across the entire fleet. 

Over the last several months, an Aethon tech team has been running the robots through their paces, using sonar and laser guidance -- combined with standard and infrared cameras — to map out every inch of the UCSF Medical Center facility. When Tugs get where they're going, they can say so in one of several voices. (In today's  demo the Tug spoke with an Australian accent, but there are other options, including Spanish language voices, a UCSF Medical Center spokesperson said.)

Hospital staffers can also gussy up the robots with decals; the pediatric wards have their Tugs dressed up as cable cars to make them more kid-friendly. 

The Tugs are trained to navigate smoothly around people and gurneys in the hallways, and an in-house programmer and technician are tasked with improving their wayfinding. For instance, if a patch of hallway gets especially sunny for an hour or two a day, the Tug's infrared camera might see that as an obstacle; it's the tech's job to teach the fleet to ignore those hurdles and keep going. What one robot learns, they all learn, and the Aethon team supporting the Tugs gets access to all the data, helping refine routes for maximum efficiency.  


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