The past year has been difficult for startups everywhere, but running a company in Ukraine during the Russian invasion comes with a whole different set of challenges.

Clinical psychologist Ivan Osadchyy brought his medical device, called Knopka, to this year’s CES show in Las Vegas in hopes of getting it into U.S. hospitals.

He is one of a dozen Ukrainian startups backed by a government fund that is at CES this year to show their technology to the world.

“Two of our hospitals we operated before are ruined already and one is still occupied. So this is the biggest challenge,” Osadchyy said.

“The second challenge is for production and our team because they are shelling our electricity system and people are hard to work without lights, without heating in their flats,” he said.

He came up with the device after spending a year with his own grandmother in the hospital and finding that he had to track down nurses when she needed something.

The system works by notifying nurses when a patient has an abnormal heart rate, is due for treatment, or otherwise needs help. The nurse can’t turn off their button until they’ve dealt with the issue.

“We are still working and operating because hospitals are open and we need to support them and provide efficiency and safety for patients as well,” he said.