1. All hypoxic and ischemic diseases
2. Diseases caused by hypoxia and ischemia
3. A series of diseases related to hypoxia and ischemia during the evolution of the disease, involving multiple clinical specialties (For example: cerebral hemorrhage, brain trauma, neuritis, vasculitis, diabetes gangrene, ulcers difficult to heal, acute Sexual gas embolism, altitude sickness, sudden deafness, vertigo, etc