In Mariupol, the doctors were split up and Dmytro Kubrjak ended up in a factory where they cared for marines.

- Sometimes I had to make difficult decisions and help the military personnel who could still get help.

Even though we had such limited resources, we tried to help everyone and fought for every life, he says.

Captured by Russian soldiers

He worked underground and eventually could not tell the difference between day and night.

Dmytro and his colleagues saved many lives, but what he remembers most today is Marine Pavel Sambura who came in with a shot through the head.

Dmytro and his colleagues managed to save Pavel's life before they were all captured by Russian soldiers and taken to an old prison.

- They were surprised and doubted at all that we had carried out this operation.

Then they realized that there was no one else besides us and after that I even felt a little respect for us doctors, says Dmytro Kubrjak.

"They said that Ukraine will cease to be a state"

But the respect did not make life in captivity easier for Dmytro.

The prison where he spent five months was right on the front line.

There was neither water nor sewage, but the worst part was the isolation from the outside world.

- We did not understand what was happening out there while the prison administration gave us misinformation.

They said that no one cares about us, that there is actually nowhere to return to, because in a little while Ukraine will completely cease to exist as a state.

It was very depressing, he says.

Ready to risk life again

At the end of September, a prisoner exchange took place and Dmytro Kubrjak was able to return home.

In just a few weeks he will be back on duty after recovering but already he is thinking of offering himself to go off to battle.

- I think I will want it for such a person that I want to be as useful as possible.

Watch the whole Foreign Office: Christmas in Kyiv in SVT Play from 20.00 or 22.00 in SVT2.