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前床突和周围结构的显微解剖研究

发布时间:2018-07-27 18:27
【摘要】: 目的 前床突是前、中颅窝的分界点,又是视神经、颈内动脉外侧的保护标志,因此,前床突有着重要的解剖意义。其位置重要,对于该区域的病变,需要考虑如何通过磨除前床突获得手术操作空间是近几年来研究的热点和难点。为取得国人此方面的资料,为临床眶上裂及海绵窦区域病变的显微外科手术入路提供解剖学参数依据,本研究通过显微镜下对尸体头颅的解剖、测量,明确前床突与周围结构的解剖关系,并对高度个体化的骨性结构、神经、血管、硬膜等的解剖关系进行分析统计,我设计了此项研究。 方法 应用福尔马林充分固定的国人成人尸头湿标本10例20侧,无法确切地判定年龄和性别,为更准确地区分动静脉,维持血管正常粗细和提高拍摄质量,所有头颅湿标本均在动脉系统灌注混有红色染料的乳胶,静脉系统灌注混有蓝色染料的乳胶。漂白的国人成人颅骨干标本10例20侧,供骨性结构的观察和测量。选择前外侧方手术最有代表性的额颞开颅翼点入路进行详细研究,在手术显微镜下,模拟手术入路逐层解剖,对解剖结构进行精确测量和拍摄,所得数据均经spss软件处理,以平均数测量值范围的形式表现。 结果 1、APC前外下方为眶上裂,前外与蝶骨小翼连接,前内与视神经管顶部后缘及视柱相连结,内侧有颈内动脉通过,外下侧有海绵窦。状如锥形,其长、宽、厚分别为9.80±1.22(7.52-12.48)mm,12.57±2.41(8.67-17.25)mm,5.74±1.39(3.10-9.97)。可通过硬膜内外联合法磨除,注意其下缘紧贴着海绵窦外侧壁内的颅神经。 2、在前床突切除前后,左右两侧结合起来测量的平均值±标准差分别如下。视神经长度:9.56±1.85mm和21.37±2.94mm;颈内动脉长度:9.97±2.06mm和13.82±2.53mm;视神经颈内动脉三角(OCT)宽度:3.67±1.10mm和12.54±2.37mm;OCT长度:9.66±2.39mm和22.09±23.32mm。 3、床突间隙是磨除前床突后人为形成的一锥形腔隙,尖端指向后方,毗邻组织与前床突存在时大致相同。其空间大小与前床突及周围组织结构的构成、范围和边缘的大小有很大的关系,其中全颈内动脉(ICA)型最大,并可影响经该处的显微手术操作。其内长8.12±2.54(4.20-14.23)mm,内下长11.54±3.21(4.11-16.52)mm,宽5.32±1.24(2.23-7.52)mm,顶部深2.33±0.84(0.52-4.50)mm,根部深8.22±2.51(5.32-16.23)mm。 4、视柱是分隔视神经管与眶上裂的柱状结构。 5、测量神经管上、下壁长度分别为8.20±1.23(6.06-10.28)mm,5.95±2.96(1.42-12.62)mm,距颅口内、外缘间距分别为12.64±2.62(8.00-17.16)mm,23.71±3.55(17.14-29.30)mm。 6、眶上裂被键环分为外、中、下三个区,经其穿行的颅神经及血管毗邻位置及区域较恒定,所有穿行于海绵窦的神经和眼静脉均经眶上裂入眶,其中动眼神经下支最粗,泪腺神经最细。 7、颈内动脉床突段位于远、近侧硬脑膜环之间,外观呈楔形,前方与视柱、内侧与蝶骨颈动脉沟前部、上外侧与前床突相毗邻。ICA床突段的远环和近环都不完整,ICA床突段内侧血管壁与骨膜之间存在床突静脉丛间隙,颈内动脉床突段应该是海绵窦内结构。 结论 1、床突周围区域的狭小空间,汇集了颅底最重要、最复杂和最密集的血管、颅神经和其它的组织结构,密切联系,难以分离。 2、磨除前床突后形成的床突间隙,增加了手术操作空间;在视神经和OCT长度方面增加了两倍的显露,同时在OCT宽度方面增加了3~4倍,提高了视神经、ICA的显露,扩大了OCT,在显微外科方面有几个重要的优点,包括:(1)早期定位、显露视神经和ICA;(2)视神经和ICA的活动和减压能预防术中的神经血管损伤;(3)改善了到达困难位置的手术入路,这对更加完全切除肿瘤带来方便。 3、颈内动脉床突段多数情况下应属于海绵窦内结构,术中要暴露颈内动脉床突段等结构必须磨除前床突。 4、经颅手术入路治疗眶尖区病变时,应根据病变部位及侵袭范围选择内侧、中央或外侧入路,以获得最大暴露和最少损伤。 5、视神经管减压时,应切实开放视神经管及视神经鞘的中、前段。
[Abstract]:objective
The anterior bed process is the demarcation point of the anterior and middle cranial fossa, and it is a protective sign of the optic nerve and the lateral of the internal carotid artery. Therefore, the anterior bed process has an important anatomical significance. Its position is important. It is a hot and difficult point to consider how to get the operation space by grinding the anterior bed process for the lesions in this area. The data provided the anatomical basis for the microsurgical approach to the clinical orbital fissure and the cavernous sinus regional lesion. The anatomical relationship between the anterior bed process and the surrounding structure was determined by the anatomy of the corpse head under the microscope, and the anatomical relationships of the highly individualized bone structure, nerve, blood vessel, and dura were divided into the anatomical relationships of the highly individualized bone, nerve, blood vessel and dura. Statistics, I designed this study.
Method
10 cases of adult cadaver head wet specimens of formalin were fully fixed in 20 sides. They were unable to determine the age and sex, to divide the veins in the more accurate area, to maintain the normal blood vessel and to improve the quality of the shooting. All the wet specimens of the head were filled with latex with red dye in the arterial system, and the blue dye was mixed with the venous system. Latex. Bleached Chinese adult cranial diaphysis specimens of 10 cases, 20 sides, for observation and measurement of bone structure. Select the most representative frontal and temporal craniofacial pterional approach for the anterior lateral lateral operation. Under the operation microscope, the surgical approach is anatomically dissected and the anatomical structure is measured and taken accurately. The data are all through SPSS software. Processing, in the form of an average range of measured values.
Result
1, APC anterior and inferior in the upper part of the orbital fissure, anterior and sphenoid wing, anterior to the posterior of the optic canal and the optic column, the internal carotid artery through the internal carotid artery, and the cavernous sinus on the outer side. The length, width and thickness are 9.80 + 1.22 (7.52-12.48) mm, 12.57 + 2.41 (8.67-17.25) mm and 5.74 + 1.39 (3.10-9.97). After grinding, the lower edge of the cavernous sinus should be kept close to the cranial nerves.
2, before and after anterior resection, the average standard deviation of the measured values of the left and right sides was as follows. The optic nerve length was 9.56 + 1.85mm and 21.37 + 2.94mm; the length of the internal carotid artery was 9.97 + 2.06mm and 13.82 + 2.53mm; the width of the internal carotid triangle (OCT) of the optic nerve: 3.67 + 1.10mm and 12.54 + 2.37mm; OCT length: 9.66 + 2.39mm and 22.09 + 23.32mm.
3, the bed gap is a conical cavity formed by grinding the anterior bed process. The tip points to the rear, and the adjacent tissue is roughly the same as that of the anterior bed process. The space size is closely related to the structure of the front and surrounding tissue, the size of the range and the size of the edge, of which the total internal carotid artery (ICA) type is the largest and can affect the microscopical microscopy. The operation was 8.12 + 2.54 (4.20-14.23) mm, 11.54 + 3.21 (4.11-16.52) mm, 5.32 + 1.24 (2.23-7.52) mm, 2.33 + 0.84 (0.52-4.50) mm at the top, and 8.22 + 2.51 (5.32-16.23) mm. in the root.
4, the optic column is a columnar structure separating the optic canal from the supraorbital fissure.
5, on the nerve canal, the length of the lower wall was 8.20 + 1.23 (6.06-10.28) mm, 5.95 + 2.96 (1.42-12.62) mm, and the distance from the cranial mouth was 12.64 + 2.62 (8.00-17.16) mm, 23.71 + 3.55 (17.14-29.30) mm., respectively.
6, the orbital fissure is divided into the outer, middle and lower three areas. The cranial nerve and the adjacent area of the blood vessels are relatively constant. All the nerves and the eye veins that go through the cavernous sinus are split into the orbit through the orbit, of which the lower oculomotor nerve is the thickest and the lacrimal gland is the finest.
7, the segment of the internal carotid artery was located between the distal and proximal dural rings with a wedge-shaped appearance, the front and the optic column, the medial and the anterior part of the sphenoid carotid artery, the distal and proximal rings of the.ICA bed adjacent to the superior lateral and anterior protrusion, and the interspace between the medial vascular walls of the ICA bed and the periosteum, and the internal carotid artery bed process should be The internal structure of the cavernous sinus.
conclusion
1, the narrow space around the area around the bed, the most important, most complex and densest vessels of the skull base, the cranial nerves and other tissue structures, closely linked and difficult to separate.
2, the clearance of the bed process which was formed after the anterior bed process increased the operation space, increased the exposure of the optic nerve and the length of the OCT by two times, and increased the width of the OCT by 3~4 times, increased the exposure of the optic nerve, ICA, expanded the OCT, and had several important advantages in the microsurgery, including: (1) early localization and exposure of the optic nerve. ICA; (2) the activity and decompression of the optic nerve and ICA can prevent the neurovascular injury in the operation; (3) the surgical approach to the difficult position is improved, which is convenient for the more complete resection of the tumor.
3, most of the internal carotid artery segment should belong to the structure of the cavernous sinus. During the operation, we must expose the structure of the internal carotid artery, and so on.
4, the medial, central or lateral approach should be chosen according to the lesion location and the range of invasion to obtain the maximum exposure and minimal damage when the craniotomy approach is used to treat the orbital apex lesions.
5, when the optic canal is decompressed, the middle and anterior segment of optic canal and optic nerve sheath should be opened.
【学位授予单位】:中国医科大学
【学位级别】:硕士
【学位授予年份】:2009
【分类号】:R322

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