On Thursday, shock surgeon David Nott was in London that is a far distance from Ukraine. But that didn't deter him from assisting to rescue the leg of a man ravaged by a bang in the war-devastated country.
Oleksandr, the doctor who actually perform the operation, had at no time carried out the foxy plan of action before. But about a week earlier, he had observed Prof Nott substantiate how it was carried out inside a Ukrainian hospital.
And so Oleksandr snapped a photograph of the laceration with his hand held phone and transmitted to Prof Nott, who had not too long aviated back to the UK. The competent British militant specialist in surgery established the surgery was unavoidable. He had earlier bequeathed Oleksandr with a videotape explaining how it will be carried out.
"I was quite nervous and it was slowly, step-by-step surgery, but it went well thanks to David Nott," Oleksandr says.
Prof Nott, whose origin is Carmarthen in west Wales, has formerly operated in battle fronts including Afghanistan, Iraq and Syria.
By happy chance for Oleksandr and his sufferer, the advisor surgical expert at St Mary's Hospital in London had made Ukraine the brand new terminal in his assignment to coach doctors how to deal with war bruise.
Russia's strategy of explosion and cannonading and gunfire of cities means Ukraine's hospitals are at the moment seeing many harmful effects on the body of sudden changes in pressure produced by explosion.
"It is the worst possible way of attacking the opposition, by simply shelling," says Prof Nott, in his preliminary nterview since returning from Ukraine. "It causes enormous damage. It causes dreadful, dreadful injuries." These include shrapnel wounds to soft tissue, bones and limbs.
Even just the shockwave of such a blast can do huge damage, he says. The "blast wind" in its wake is capable of amputating limbs. Being thrown against buildings can cause traumatic injuries, too.
Barotrauma is physical injury caused by changes in pressure during an explosion and this is a particular worry because of Russia's use of thermobaric weapons, also known as vacuum bombs. These can cause bleeds on the brain and in the lungs, causing victims to cough up blood. They are also capable of bursting ear drums and perforating bowels.
While he admits he has toured all around Ukraine - "north, east, south-east, west" - Prof Nott does not want to disclose the specific hospitals or areas he has visited for fear that Russian military forces will pick out them and for this singular reason, this report is not using Oleksandr's full name or location.