Complex sentence: The war had its impact on medical science: a surgical intervention for comatose patients with penetrating brain injuries was created by Iranian physicians treating wounded soldiers, later establishing neurosurgery guidelines to treat civilians who had suffered blunt or penetrating skull injuries.
Split into simpler sentences: The war had its impact on medical sciences: a surgical intervention for comatose patients with penetrating brain injuries was created by Iranian physicians to treat wounded soldiers. It later helped establish neurosurgery guidelines to treat civilians who had suffered blunt or penetrating skull injuries.