Performation of surgical procedures anterior to ethmoid bulla can avoid risks of the other models, therefore, endoscopic frontal sinusotomy in the route anterior to ethmoid bulla is a safe model.

结论通过鼻内镜对额窦开口及周围解剖结构的观察，状裂作定的解剖识别额窦开口的关键区域。筛泡前径路鼻内镜下额窦开放的安全入路，能避免其他径路存在的某些风险。