The results also showed that the nasal plug connection was simple and effective. The high to sub-high frequency jet ventilation, and nasal plug connection is effective and safe for treating the elderly patients with mild to moderate type ⅱ respiratory failure of COPD. 作者认为,适当调低频率,采用高频&准高频喷射、鼻塞连接通气,是使用HFJV治疗老年COPD轻、中度Ⅱ型呼吸衰竭安全有效的方法。