Conclusions:Ultrasound can be used as one of the first diagnostic method in maxillary sinusitis,particularly for children and pregnant women.It has high value in guiding sinus puncture and irrigation.

• 结论：超声检查可作为上颌窦炎的初筛方法之一，特别适合于儿童及孕妇，且对指导临床选择穿刺病例有实用价值。