Methods: A total of 218 cases suffering from chronic maxillary sinusitis and receiving endoscopic sinus surgery were divided into two groups at random.

• 方法：将慢性上颌窦炎218例随机均分为两组，A组的手术范围是切除钩突、筛泡，开放前、中、后组筛窦，扩大上颌窦自然开口，切除部分肥厚明显的中鼻甲；