Abstract: ［Abstract］ Objective To explore the value of eustachian tube CT reconstruction in patients with hyperbaric oxygen therapy. Methods Eighty patients （total 160 ears） were recruited. Among 160 ears， 112 ears which showed eustachian tube dysfunction in eustachian tube pressure test were grouped into eustachian tube dysfunction group （ETD） and the other 48 ears into normal eustachian tube function group （NETF）. All participants underwent CT scanning both in resting state and after performing Valsalva maneuver. 3D CT reformations were done and structural parameters were measured. Analyze the incidence of middle ear barotrauma in patients treated with hyperbaric oxygen. Results Significant difference were found between the ETD and NETF groups for cartilaginous portion length after Valsalva maneuver （F=3.57，P=0.017）. However， there was no statistically significant difference between the angle of bony portion and cartilaginous portion，the total length of cartilage between the two groups，the open length of the static lower cartilages. The total incidence of middle ear barotrauma was 7.2%. Conclusion 3D CT reformation is a valuable tool for revealing eustachian tube structure and assessing its function. The incidence of middle ear barotrauma can be greatly reduced by timely targeted etiological treatment for patients with eustachian tube dysfunction.

Key words: hyperbaric oxygen, eustachian tube, three?dimensional computed tomography reformation

摘要： ［摘要］ 目的 探索咽鼓管CT三维重建技术在高压氧治疗中的价值。方法 收集拟行高压氧治疗的患者80例（共160耳）为研究对象，根据咽鼓管测压检查结果，分为咽鼓管不通组（112耳）和咽鼓管通畅组（48耳）。所有患者均采用多层螺旋CT分别行颞骨静态及Valsalva后CT扫描，并作咽鼓管三维重建，分别测量并比较两组CT重建后软骨段与骨段角度、静态软骨部全长及软骨段开放长度、Valsalva后软骨段开放长度。计算所有高压氧治疗的患者中耳气压伤的发生率。结果 咽鼓管不通组的Valsalva后软骨开放长度较通畅组短，差异具有统计学意义（F=3.57，P=0.017）；静态咽鼓管软骨段开放长度短，但两组间软骨段与骨段角度、静态下全软骨长度及软骨开放长度无统计学差异。中耳气压伤的发生率为7.2%。结论 咽鼓管CT三维重建可直观显示咽鼓管的异常结构及软骨段开放情况；通过对咽鼓管功能障碍患者及时进行针对性的病因治疗，可明显降低高压氧治疗患者的并发症中耳气压伤的发生率。

关键词: 咽鼓管, 多层螺旋CT三维重建, 高压氧