The airflow in the maxillary air sinus and by the maxillary hiatus was slow.
上颌窦口和上颌窦内的气体流速均较低。
Air-fluid level in the left maxillary sinus (red arrow) containing high attenuation is consistent with hematoma.
左侧上颌窦气液平面（红箭）密度较高，符合出血。
Keeping the sinuses healthy and infection-free requires ventilation - keeping air flowing smoothly between the sinus and nasal cavities.
呼吸通畅，让气流在窦道和鼻腔间平缓流通，是治疗鼻窦感染保持健康的主要手段。
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