Ukraine's assault against Russian positions flanking the city of Bakhmut has triggered a surge in battlefield casualties, piling pressure on the besieged nation's frontline medics. At a stabilisation point near the frontline in the Donetsk region, Ukrainian doctors are fighting to keep troops with head and chest wounds, severed limbs and catastrophic blood loss alive long enough to be transferred to hospital. "This is a serious job," a military surgeon named Bogdan says, his face etched with fatigue and concern as teams intervene in clinic corridors to stabilise patients. IMAGES AND SOUNDBITES