【摘要】：目的分析先天性外耳道閉鎖癥鼓室段面神經(jīng)管遮窗的原因。方法對23例先天性外耳道閉鎖患兒(閉鎖組)和36名正常兒童(對照組)耳部行CT掃描,測量鼓室段面神經(jīng)管的寬徑(Φ)、第二彎曲角度(a°)、缺裂口長度(D),神經(jīng)管管壁上緣與外半規(guī)管下緣間的距離(d_1)及前庭窗下緣與面神經(jīng)水平段的垂直距離(d_2),分析各測量值與面神經(jīng)管低位程度值之間的關(guān)系。結(jié)果 (1)與對照組相比,閉鎖組a°和d_2變小,d_1增大[閉鎖組(107.98±14.20)°、(0.64±0.45)mm、(1.25±0.32)mm,對照組(118.43±11.65)°、(0.94±0.30)mm、(1.08±0.28)mm,P均0.05];兩組Φ、D值的組間差異均無統(tǒng)計學(xué)意義(P0.05)。(2)遮窗程度d_2≤0.4 mm:閉鎖組8耳(17.4%,8/46),其中2耳遮窗程度d_2≤0(4.3%,2/46);對照組遮窗程度d_2≤0.4 mm 2耳(2.8%,2/72)。(3)在閉鎖組中,a°、d_1與d_2呈負(fù)相關(guān)(r分別為-0.44、-0.49,P均0.05),Φ、D及耳部并發(fā)其他畸形的數(shù)目與d_2無明顯相關(guān)性(P均0.05)。結(jié)論先天性外耳道閉鎖癥面神經(jīng)管低位遮窗主要因鼓室段下行所致,d_1的增大為重要征象。
[Abstract]:Objective to analyze the causes of fenestration of tympanic segment facial canal in congenital atresia of external auditory meatus. Methods 23 cases of congenital atresia of external auditory meatus (atresia group) and 36 normal children (control group) were scanned with CT. The width (桅), the second bending angle (a 擄) and the length (D), of facial canal of tympanic segment were measured. The distance between the upper edge of the canal wall and the lower edge of the external semicircular canal (d / d) and the vertical distance between the lower margin of the vestibular window and the horizontal segment of the facial nerve (d / 2) were analyzed. The relationship between the measured values and the lower degree of the facial canal was analyzed. Results (1) compared with the control group, the degree a and day 2 decreased and the day 1 increased [(107.98 鹵14.20) 擄, (0.64 鹵0.45) mm, (1.25 鹵0.32] mm, in the control group (118.43 鹵11.65) 擄. (0.94 鹵0.30) mm, (1.08 鹵0.28 mm,P); There was no significant difference in 桅 and D values between the two groups (P0.05). (2). The degree of window shading was less than 0.4 mm: in 8 ears (17.4%, 8 / 46), among which 2 ears were less than 0 (4.3%). (2) 46); In the control group, the degree of window shading was less than 0.4 mm in 2 ears (2.8%, 2 / 72). (3). In the atresia group, a 擄, d ~ (1) and d ~ (2) were negatively correlated (r =-0.44, P = 0.49, P < 0.05), 桅, respectively. There was no significant correlation between the number of D and other deformities in the ear and d _ (2) (P 0.05). Conclusion the lower fenestration of facial canal in congenital atresia of external auditory meatus is mainly caused by the descending tympanic segment, and the increase of d 1 is an important sign.
【作者單位】： 廣州市婦女兒童醫(yī)療中心醫(yī)學(xué)影像部;廣州市婦女兒童醫(yī)療中心耳鼻喉科;
【基金】：廣東省醫(yī)學(xué)科學(xué)技術(shù)研究基金項目(編號:A2012511)
【分類號】：R764.9;R816.96

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