The mean length of the stria vascularis (SV) and the basilar membrane of four normalguinea pigs measured by means of surface preparation was 21.11 mm and 19. 90 mm respectively,and the mean width of their apical turns...The mean length of the stria vascularis (SV) and the basilar membrane of four normalguinea pigs measured by means of surface preparation was 21.11 mm and 19. 90 mm respectively,and the mean width of their apical turns of SV and the turns of the cochlear basis was 0. 44 mmand 0. 86 mm respectively. The ultrastructure of SV, spiral ligament (SL) and spiral prominence(SP) of both ears of eight guinea pigs were observed by scanning electron microscopy(SEM) andtransmission electron microsoopy(TEM). There were a large number of coated vesicles in thesupranuclear region of SV, some opened to the endolymph. A great number of folding cytoplasmicprojections were filled with small vesicles The capillary network was extremely rich indicating thatthe endolymph could be secreted and absorbed by SV. The cellular conjunction in the SV. SL andSP formed an effective barrier. It has not been proved in this study that the melanin offers resistanceto acoustic stimulation.展开更多
文摘The mean length of the stria vascularis (SV) and the basilar membrane of four normalguinea pigs measured by means of surface preparation was 21.11 mm and 19. 90 mm respectively,and the mean width of their apical turns of SV and the turns of the cochlear basis was 0. 44 mmand 0. 86 mm respectively. The ultrastructure of SV, spiral ligament (SL) and spiral prominence(SP) of both ears of eight guinea pigs were observed by scanning electron microscopy(SEM) andtransmission electron microsoopy(TEM). There were a large number of coated vesicles in thesupranuclear region of SV, some opened to the endolymph. A great number of folding cytoplasmicprojections were filled with small vesicles The capillary network was extremely rich indicating thatthe endolymph could be secreted and absorbed by SV. The cellular conjunction in the SV. SL andSP formed an effective barrier. It has not been proved in this study that the melanin offers resistanceto acoustic stimulation.
文摘目的:探讨多层螺旋CT(multislice spiral CT,MSCT)和MRI对膝关节隐匿性骨折伴半月板及韧带损伤的诊断价值。方法:自2020年1月至2021年3月,经关节镜或手术定性确诊膝关节隐匿性骨折伴半月板及韧带损伤患者63例,男41例,女22例,年龄21~67(44.35±8.77)岁,病程1~6(4.64±1.75)d;体质量指数(body mass index,BMI)(19.85±2.78)kg/m^(2)。收集63例患者的MSCT和MRI检查资料,统计分析相关数据并评价二者的诊断价值。结果:MRI对膝关节隐匿性骨折伴半月板及韧带损伤、关节腔积液、骨髓水肿和关节面损伤的检出率分别为100.00%(63/63),95.24%(60/63),42.86%(27/63)和36.51%(23/63),MSCT的检出率分别为49.21%(31/63),41.27%(26/63),0.00%(0/63)和1.59%(1/63),差异有统计学意义(P<0.05);MRI的诊断灵敏度、特异度和准确度高于MSCT(P<0.05)。结论:MRI对膝关节隐匿性骨折伴半月板及韧带损伤的诊断灵敏度、特异度和准确度明显优于多层螺旋CT,对关节腔、关节面及骨髓等周围组织病变诊断准确性较高,可降低临床误诊风险。
