、原因和机制( Causes& mechanism) Classification of respiration failure mechanism) Restrictive ventilatory disorders 1. Ventilatory disorders Obstructive ventilatory disorders Diffusion disorders 2. Gas exchange disorders Ventilation-perfusion mismatching (Increased of anatomica/ shunt (一)肺通气功能障碍( Ventilatory disorders) 1. Etiologies and mechanisms of alveolar hypoventilation (1)限制性通气不足( Restrictive ventilatory disorders) 由于肺泡扩张受限引起肺泡通气量不足—→限制性通气不足（一） （Ventilatory disorders） 1. Ventilatory disorders 2. Gas exchange disorders Diffusion disorders Ventilation-perfusion mismatching （Increased of anatomical shunt） Restrictive ventilatory disorders Obstructive ventilatory disorders