以带蒂筋膜瓣为膜诱导促非细胞型组织工程骨血管化及骨再生修复骨缺损的实验研究

Objective To study the effect of fascial flap with vessels inducing the vascularization of uncel-lular tissue engingeering complex and the regenration of bone on the repair of bone defect, so as to provide the basis for the clinical application. Methods An animal model of bone defect on adult Newzland rabbits'right radial bone was established .and autologous red bone marrow were taken out and mixed into uncellulax tissue engineering comple-xes with OAM which contained BMP. The experiment animals were divided into two groups : experiment group and control group( n = 12 for each ). The control group was only implanted with complexes, meanwhile, the experiment group had fascial flap with vessels. By microsurgery technology,a non-named fascial flap with vessels was prepared, which belonged to capillary net,around the bone defect,and let it wrap tissue engineering complex,fill up bone de-fect. In a certian time, radiograph(X-ray) and light density measure was conducted, gross morphology and histological inspection was exmained. Bone shape measurement analysis and image of vessel analysis were conducted. All the sta-tistics were analyzed by the SPSS 11.5 software. Results Because of mechanically preventing fiber connective tis-sues and surrounding soft tissues from entering the areas of bone defect by fascial flap, it can keep bone defect having a relative stable environment ;The subfascial space itself, and also the shape and mass of filled-in subject had the de-cisive effect on the results of the regeneration of the bone; Owing to the establishment of blood supply during the con-structing tissue engineering complex. The experiment group was obviously superior to the control group. Compared with control group,the absor bance obviously increased in experiment group [(0. 732 ± 0. 021 ) vs (0. 651± 0.018)] (P < 0. 001 ) four weeks after the operation; also the bone trabecular body was significantly increased [(2.32±2.57)% vs(19.37±3.52)% ,(8.37±3.52)% vs(30.24±3.42)% ,(28.57±2.98)% vs(58.76± 4.62)% ,(47.24±3.42)% vs(88.72±5.84)%] ,and capillary area [(5.04±1.62)% vs(17.53±2.86)%, (10.37 ±2.96)% vs(35.24±1. 13)%,(18.20±2. 12)% vs(48.76±4. 62)%,(17.82 ±2. 74)% vs (57.72 ±5.84)%] (P <0.05) at each time period(4 weeks,8 weeks,12 weeks,and 16 weeks after operation). Despite of growth of implant's internal vessel, the number and speed of forming bone trabecula and cartilaginous tis-sue, even developing of mature bone structure, recreating of diaphysis structure, reconstructing of marrow cavity, ab-sorbing and decomposing of implant, the experiment group was obviously superior to the control group. Conclusions The induction of fascial flap with vessels shows double effects, one of which is the vascularization of uncellular tis-sue engineering complex and the other is membrane guided bone regeneration, So the method has a wonderful effect on the repair of bone defect.     

骶部硬膜外囊肿的临床影像学表现与外科治疗(18例报告及文献综述)

[目的]结合文献探讨骶部硬膜外囊肿（SEC）的临床表现、影像学特点与外科治疗，以便提高对该病的临床诊断和治疗水平。[方法]本组18例，其中腰骶部钝痛17例（95％）、下肢放射性疼痛和间歇性跛行16例（90％）、神经功能损害14例（77％）、盆腔或下腹部无痛渐进性肿块并压迫临近器官2例（11％）。18例均行腰骶部及骨盆X线片检查，其中17例行CT扫描、11例行MRI检查、7例行脊髓造影、4例行CTM扫描。[结果]本病临床误诊率为78％，X线诊断率17％，CT诊断率72％；MRI检查、脊髓造影、CTM扫描诊断率100％。18例均手术切除，病理报告为硬膜外囊肿，椎管内型、积液型、单发囊肿为多数；随访15～32个月，平均24个月，未发现症状加重和复发病例。[结论]骶部硬膜外囊肿临床与影像学具有特征性表现；微创术和腹腔镜、脊髓或椎管镜摘除骶椎管内囊肿的临床应用疗效有待于定论；显微外科技术的应用提高了SEC全切除率，手术是治疗和防止本病复发的最主要和最可靠方法。     

儿童孤独症谱系障碍合并癫痫的临床和脑电图特征分析

目的 分析孤独症谱系障碍(ASD)合并癫痫患儿临床和脑电图(EEG)特征,为临床完善ASD共患癫痫的诊疗提供线索.方法 选取2017年1月-2019年12月就诊于河北省儿童医院的120例ASD合并癫痫的患儿为研究对象,对其临床特点和EEG特征进行回顾性分析.结果 ASD合并癫痫患儿癫痫发作以局灶性发作(83.3％)为主...     

唑尼沙胺对戊四氮致痫小鼠认知功能的影响

目的探讨唑尼沙胺(ZNS)对癫痫小鼠的认知功能影响及抗癫痫作用。方法利用戊四氮(PTZ)致痫小鼠模型,通过Morris水迷宫实验、神经元特异性烯醇化酶(NSE)及海马组织形态学的改变,观察ZNS对癫痫小鼠的认知功能影响及抗癫痫作用。结果正常组小鼠无惊厥发作,血清NSE水平在正常范围,海马组织结构正常;癫痫组惊厥出现时间早,发作程度重,血清NSE水平明显高于其它两组,海马组织结构紊乱、疏松;ZNS组惊厥出现时间晚,发作程度轻,血清NSE水平略高于正常组而显著低于癫痫组,海马组织结构无显著变化。结论 ZNS有明确抗癫痫作用,通过控制癫痫发作,有效的改善致痫小鼠的认知功能。     

以带蒂筋膜瓣为膜诱导促非细胞型组织工程骨血管化及骨再生修复骨缺损的实验研究

目的 研究以带蒂筋膜辨为膜诱导促非细胞型组织工程骨血管化及骨再生修复骨缺损的效果,为临床应用提供依据.方法 将24只成年新西兰大白兔右侧桡骨造骨缺损模型,取自体红骨髓与含骨形成蛋白的骨诱导活性材料混合成非细胞型组织工程复合体.分为2组,对照组12只,仅植入复合物;实验组12只,利用显微外科技术在骨缺损邻近制备一个带有无名血管蒂所属毛细血管网的筋膜瓣,使其包裹组织工程复合体并充填骨缺损.在一定时间内进行X线检查和吸光度比测量、大体观察和组织学检查、修复区内骨形态计量分析和交界区血管图像分析.定量变量组间所得数据比较,采用SPSS 11.5软件行方差分析以及t检验.结果 筋膜瓣机械性地阻碍了纤维结缔组织和周围软组织进入骨缺损部位,保持骨缺损部位有相对稳定的环境;膜下间隙空间本身及充填物的形状和量对骨再生的形状和量起决定作用;在构建组织工程化骨的同时建立其血液供应,2组术后4周的吸光度值[对照组(0.732±0.021)与实验组(0.651±0.018)]相比差异有统计学意义(P<0.05),2组各时间点(术后4、8、12、16周)的骨小梁面积占修复区面积的比值[对照组为(2.32±2.57)%、(8.37±3.52)%、(28.57±2.98)%、(47.24±3.42)%,实验组分别为(19.37±3.52)%、(30.24±3.42)%、(58.76±4.62)%、(88.72±5.84)%]和骨修复交界区单位面积内血管再生面积[对照组为(5.04±1.62)%、(10.37±2.96)%、(18.20±2.12)%、(17.82±2.74)%,实验组为(17.53±2.86)%、(35.24±1.13)%、(48.76±4.62)%、(57.72±5.84))%]比较,差异均有统计学意义(P均<0.05),说明无论植入物内部血管的长入、骨小梁及软骨组织形成的数量和速度,还是成熟骨结构的形成、骨干结构的重塑、骨髓腔的再通、植入物的吸收降解,明显优于无筋膜瓣对照组.结论 以带蒂筋膜瓣为膜诱导,具有促非细胞型组织工程骨血管化和膜引导性骨再生双重作用,对骨缺损有极好的修复作用.     

量化比较带蒂筋膜瓣促血管化成骨与膜诱导成骨作用及成骨效果的实验研究

目的通过量化指标测定,明确带蒂筋膜瓣包裹自体骨髓基质干细胞（BMSC）接种的非细胞型组织工程骨在修复骨缺损各时间段中的主要作用及成骨效果,为临床干预骨缺损的治疗提供依据。方法制作动物骨缺损模型及带蒂筋膜瓣,随机分为A、B、C三组,A组为单纯植入对照组,B组为无蒂筋膜瓣对照组,C组为带蒂筋膜瓣实验组,在第4、8、12、16周进行骨修复区吸光度比测量、骨形态计量分析、交界区和中心区血管图像计量分析,第8、12、16周同时进行放射性核素骨显像检查、腋动脉注入墨汁检查及生物力学测定分析。结果第4、8周时,C组与A组、B组相比较其骨修复区吸光度比值、新生骨小梁面积、再生血管面积和放射性核素骨显像摄取比值明显增多,生物力学强度增加,各项量化指标差异均有统计学意义（P〈0.05）,表现为早期骨修复过程中血管体积增多对成骨作用是有利的;第12、16周时,三组骨修复区吸光度比测量、新生骨小梁面积和生物力学强度逐渐明显增加,C组仍大于A组、B组,但各组再生血管面积和放射性核素骨显像摄取比值较第8周下降明显,差异有统计学意义（P〈0.05）,表现为随着时间的推移,成熟骨组织量的增多,血管化作用逐渐减弱,后期膜诱导成骨作用显著。结论带蒂筋膜瓣包裹自体BMSC接种的非细胞型组织工程骨具有构建血管化和膜诱导组织再生双重作用,早期促血管化成骨作用占主导地位,并有助于膜诱导成骨作用,后期膜诱导成骨作用为主,促血管化成骨作用消失,临床适时干预治疗对骨缺损修复有极好作用。