大型听神经瘤手术面神经功能的保留

目的 评估大型听神经瘤显微手术治疗后远期面神经功能,分析影响术后面神经功能的因素.方法 回顾性分析2002年1月至2009年11月实施的连续176例大型听神经瘤(直径≥30mm)手术的患者资料.采用House-Brackmann(HB)面神经功能分级系统评价术前及术后远期面神经功能.肿瘤大小与面神经功能结果的关系采用线性趋势检验统计学方法进行分析.结果 肿瘤全切除168例(95.5%),术后死亡3例(1.7%).面神经完整解剖保留169例(96.0%).共随访到135例患者,失访41例.随访时间3个月～7年,平均3年.随访＞1年的96例听神经瘤面神经功能HB 1～2级79例(82.3%),其中55例巨大型(直径＞40 mm)听神经瘤患者面神经功能HB 1～2级40例(72.7%).分析显示面神经功能结果与肿瘤直径之间存在线性关系(P＜0.05).结论 经乙状窦后入路切除大型听神经瘤,绝大部分肿瘤切除后可获得优良的远期面神经功能.肿瘤大小是影响术后面神经功能的重要因素.

Abstract：

Objectiyes To evaluate the long-term facial nerve function of patients following microsurgical removal of large and huge acoustic neuroma, and to identify the factors that influence these outcomes. Methods A retrospective review was performed which included 176 consecutive patients with a large acoustic neuroma(≥30 mm)underwent a retrosigmoid craniotomy for tumor resection between January 2002 to November 2009. House-Brackmann(HB)Scale was used preoperatively and in a long-term follow-up after surgery. Test for linear trend was applied for statistic analysis. Results Complete resection was achieved in 168(95. 5%)of these 176 patients with a mortality of 1.7%. Anatomic preservation of the facial nerve was attained in 96. 0% of the patients. In the series of 96 patients who had at least 1-year follow-up(mean 3.0 years)the facial nerve function preservation(HB grade 1-2)was totally attained in 79 patients(82.3 %), and 40 of 55 patients(72. 7 %)who presented huge tumors(diameter ＞ 40 mm)among the 96 patients had facial nerve function preserved. Analysis showed that facial nerve function correlated linearly with tumor sizes(x2 = 14. 114, v, = 1, P ＜ 0. 05). Conclusions Complete removal of large and giant acoustic neuroma may abtained via retrosigmoid approach with facial nerve preservation. Excellent longterm facial function can be expected in the majority of patients who undergo microsurgical removal of vestibular schwannoma via the suboccipital retrosigmoid approach. Tumor size is a significant prognostic parameter for facial nerve function following vestibular schwannoma surgery.     

新型微创前置肱骨中下段解剖锁定钢板的设计及相关解剖研究

目的 探讨应用自行研制的3.5 mm新型前置肱骨中下段解剖锁定钢板微创治疗肱骨干中下段骨折的可行性和安全性.方法 新鲜冷冻成人上肢6具,分别于上臂前侧远近端做3 cm皮肤切口,通过肌下隧道插入钢板,经切口打入螺钉固定.原位解剖重要神经结构,观察其与钢板的关系,测量桡神经在不同位置与钢板外侧缘、钢板最远端内侧与正中神经、螺钉头部与桡神经沟处桡神经的距离.结果 新增前置肱骨中下段解剖锁定钢板远端的绝大部分被肱肌覆盖,其与桡神经、肌皮神经及正中神经之间隔有肱肌肌腹,钢板与桡神经之间分别在穿经外侧肌间隔以及冠状窝水平的距离平均分别为14.53 mm和8.38 mm,桡神经穿经外侧肌间隔至冠状窝上缘连线中点处的平均距离为8.39 mm;屈肘80°和伸肘0°位时钢板最远端内侧与正中神经的距离平均分别为11.89 mm和l0.53mm,由近向远的第3枚螺钉头部与桡神经沟近侧缘的距离平均为5.90 mm.结论 采用自行研制的新型前置解剖锁定钢板微创固定肱骨干中下段骨折理论上是可行且安全的.

Abstract：

Objective To verify the feasibility and safety of a self-designed anatomical anterior locking plate for minimally invasive treatment of mid-distal humeral fractures. Methods Six fresh-frozen cadaveric specimens of upper extremity were used for the present anatomic study.A 3 cm incision was made on the anterior side of the arm between the deltoid muscle and biceps muscle and another 3 cm incision was made along the lateral side of biceps muscle proximal to the cubital crease to expose the anterior cortex.The plate was inserted from the distal incision proximally and positioned on the anterior side of the humeral shaft.The biceps muscle and brachialis were dissected to expose the radial,musculocutaneous and median nerves in situ.Relationships between the plate and nerves were observed.The distances between the lateral border of the plate and the radial nerve were measured where the nerve pierced the lateral intermuscular septum and at the point above the coronoid fossa and at the middle of the above 2 points.The distances between the distal end of the plate and the median nerve were measured when the elbow was in 80° flexion and full extension.The distance between the head of the third proximal screw and the spiral groove was also measured. Results Most part of the plate was covered by the brachial muscle.There was no direct contract between the plate and the radial,musculocutaneous and median nerves,all separated by the muscle belly of the brachialis.The average distances between the lateral border of the plate and the radial nerve where the nerve pierced the lateral intermuscular septum and at the superior edge of the coronoid fossa and at the middle of the 2 points were 14.53 mm (range,13.1 to 17.1 mm),8.38 mm (range,4.2 to 11.3 mm) and 8.39 mm (range,0 to 13.9 mm) respectively.The average minimum distances between the medial border of the distal end of the plate and the median nerve when the elbow was in 80° flexion and full extension was 11.89 mm (range 9.6 to 15.5 mm) and 10.53 mm (range 9.0 to 12.1 mm) respectively.The average distance between the head of the third proximal screw and the spiral groove was 5.90 mm (range,4.2 to 7.1 mm). Conclusions Our novel anatomical anterior locking plate is theoretically safe for the minimally invasive treatment of mid-distal humeral fractures.     

人工髋关节翻修旋转中心重建的临床研究

目的 探讨在人工髋关节翻修手术中,根据Harris窝及髋臼切迹的残存解剖标记,定位髋臼中心点,正确安装髋臼假体和重建髋关节旋转中心的可行性.方法 2007年4月至2009年6月,行28例髋关节翻修术.依据Paprosky分型:Ⅰ型3例,采用生物固定型髋臼假体;ⅡA和ⅡB型8例,采用打压颗粒骨植骨和大直径骨水泥型髋臼假体固定;ⅡC、ⅢA和ⅢB型17例,采用打压颗粒骨植骨和髋臼加强杯固定,其中5例有髋臼内壁穿透者采用结构性和颗粒性植骨.手术中在髋臼切迹连线的垂直平分线上方25～28mm、Harris窝窝内头侧接近原月状软骨面处,定位为原髋臼中心点,以该点为同心圆的圆心安装髋臼杯假体(Ⅰ型)或打压植骨造臼,按照俯倾角40°～45°、前倾角15°～20°安放髋臼加强杯(Ⅱ、Ⅲ型).手术前后摄双侧髋关节正位X线片,测量髋关节旋转中心至两侧泪滴连线的垂直距离和至泪滴的水平距离.分别与术前和健侧比较,评价髋关节旋转中心的重建效果.结果 髋关节旋转中心至两侧泪滴连线的垂直距离:术前为(32.64±4.51)mm,术后为(14.22±3.39)mm,差异有统计学意义(t=3.65,P＜0.05).髋关节旋转中心至泪滴的水平距离:术前为(25.13±3.46)mm,术后为(32.87±4.73)mm,差异有统计学意义(t=2.72,P＜0.05).结论 在髋关节翻修手术中,以残存的Harris窝和髋臼切迹为解剖标记,定位髋臼中心点,能够较准确地安装髋臼假体和有效重建髋关节旋转中心.

Abstract：

Objective To discuss the feasibility of positioning the acetabular center,fixing acetabular implant correctly and reconstructing hip rotation center according to Harris fossa and the remaining anatomical markers of acetabular notch in revision hip arthroplasty.Methods Twenty-eight patients underwent revision hip arthroplasty from April 2007 to June 2009.Based on Paprosky type,3 cases with type Ⅰ were treated with biological fixed acetabular component;8 cases with ⅡA and ⅡB were reconstructed with using of morselized bone grafting and large diameter cemented acetabular prosthesis;17 cases with type ⅡC,ⅢA and ⅢB were treated with using of morselized bone grafting and fixation of acetabular reinforcement ring.Among them,5 patients with massive bone loss in acetabular wall were reconstructed with the use of the structural and morselized bone grafting.The center of the original acetabulum was believed to be in the lunate cartilage surface which was closed to Harris fossa.During the operation,the center was located in the site which was 25-28 mm above in line with perpendicular bisector of acetabular notch connecting line.The acetabular center was the point of positioning acetabular prosthesis (Ⅰ type) or making new acetabulum by impaction bone grafting.Acetabular reinforcement ring (Ⅱ,Ⅲ type) was fixed in accordance with proper transverse angle and anteversion angle.The vertical distance from hip rotation center to teardrop connection and the horizontal distance from hip rotation center to teardrop were measured on preoperative and postoperative radiograph.And the outcomes of reconstruction of rotation center were evaluated.Results The vertical distance was changed from (14.22±3.39) mm preoperatively to (32.64±4.51) mm postoperatively.The difference was statistically significant (t=3.65,P＜ 0.05).The horizontal distance was changed from (25.13±3.46)mm preoperatively to (32.87±4.73) mm postoperatively.The difference was statistically significant (t=2.72,P＜0.05).Conclusion Using residual Harris fossa and acetabular notch as the anatomical markers in revision hip arthroplasty,the restoration of the anatomical hip center has shown to be favorable.     

内镜辅助下腮腺浅叶部分切除术与传统腮腺浅叶部分切除术的比较研究

Objective To investigate the feasibility of endoscopy-assisted partial-superficial parotidectomy. Methods 38 cases with benign tumors located in the superficial lobe of the parotid gland were randomly assigned to receive conventional (20 cases) or endoscopic (18 cases) partial-superficial paretidectomy. Two short incisions, which were 2 ～ 2.5 cm in length and located at retromandibular and postauricular area, were adopted for endoscopy-assisted surgery. The facial nerve was dissected through retrograde approach. Results The tumors were successfidly resected with endoscopy in 18 cases. The operation time was not significantly different between the conventional and endoscopy-assisted procedures (P > 0.05). The intraoperative blood loss was markedly lower in endoscopy-assisted group, compared with conventional group(P < 0.01). All the 18 cases with endoscopy-assisted surgery were satisfactory with the postoperative cosmetic results. The great auricular nerve was preserved very well in 12 patients(66.6%). Transcient facial paralysis happened in 1 ease and relieved 1 months later. Salivary fistula occurred in 1 case and recovered after dressing with pressure for 2 weeks. All the patients were followed up for 24 ～ 50 months (mean, 39 months) without relapse. Conclusions Endoscopy-assisted partial-superficial parotidectomy can successfully treat benign tumors located in the superficial lobe of parotid gland with a better postoperative cosmetic result.     

内镜辅助下腮腺浅叶部分切除术与传统腮腺浅叶部分切除术的比较研究

Objective To investigate the feasibility of endoscopy-assisted partial-superficial parotidectomy. Methods 38 cases with benign tumors located in the superficial lobe of the parotid gland were randomly assigned to receive conventional (20 cases) or endoscopic (18 cases) partial-superficial paretidectomy. Two short incisions, which were 2 ～ 2.5 cm in length and located at retromandibular and postauricular area, were adopted for endoscopy-assisted surgery. The facial nerve was dissected through retrograde approach. Results The tumors were successfidly resected with endoscopy in 18 cases. The operation time was not significantly different between the conventional and endoscopy-assisted procedures (P > 0.05). The intraoperative blood loss was markedly lower in endoscopy-assisted group, compared with conventional group(P < 0.01). All the 18 cases with endoscopy-assisted surgery were satisfactory with the postoperative cosmetic results. The great auricular nerve was preserved very well in 12 patients(66.6%). Transcient facial paralysis happened in 1 ease and relieved 1 months later. Salivary fistula occurred in 1 case and recovered after dressing with pressure for 2 weeks. All the patients were followed up for 24 ～ 50 months (mean, 39 months) without relapse. Conclusions Endoscopy-assisted partial-superficial parotidectomy can successfully treat benign tumors located in the superficial lobe of parotid gland with a better postoperative cosmetic result.     

内镜辅助下腮腺浅叶部分切除术与传统腮腺浅叶部分切除术的比较研究

Objective To investigate the feasibility of endoscopy-assisted partial-superficial parotidectomy. Methods 38 cases with benign tumors located in the superficial lobe of the parotid gland were randomly assigned to receive conventional (20 cases) or endoscopic (18 cases) partial-superficial paretidectomy. Two short incisions, which were 2 ～ 2.5 cm in length and located at retromandibular and postauricular area, were adopted for endoscopy-assisted surgery. The facial nerve was dissected through retrograde approach. Results The tumors were successfidly resected with endoscopy in 18 cases. The operation time was not significantly different between the conventional and endoscopy-assisted procedures (P > 0.05). The intraoperative blood loss was markedly lower in endoscopy-assisted group, compared with conventional group(P < 0.01). All the 18 cases with endoscopy-assisted surgery were satisfactory with the postoperative cosmetic results. The great auricular nerve was preserved very well in 12 patients(66.6%). Transcient facial paralysis happened in 1 ease and relieved 1 months later. Salivary fistula occurred in 1 case and recovered after dressing with pressure for 2 weeks. All the patients were followed up for 24 ～ 50 months (mean, 39 months) without relapse. Conclusions Endoscopy-assisted partial-superficial parotidectomy can successfully treat benign tumors located in the superficial lobe of parotid gland with a better postoperative cosmetic result.     

Autogenous standard versus inside-out vein graft to repair facial nerve in rabbits

Objective： To evaluate autogenous vein grafts and inside-out vein grafts as conduits for the defects repair in the rabbit facial nerves. Methods： The 10 nun segments of buccal division of facial nerve were transected for 48 rabbits in this study. Then the gaps were immediately repaired by autogenous vein grafts or inside-out vein grafts in different groups. All the animals underwent the whisker movement test and electrophysiologic test during the following 16 weeks at different time points postoperatively. Subsequently, the histological examination was performed to observe the facial nerve regeneration morphologically. Results： At 8 weeks after operation, the facial nerve regeneration has significant difference between the experimental group and the control group in electrophysiologic test and histological observation. However, at the end of this study, 16 weeks after operation, there was no signifi- cant difference between inside-out vein grafts and standard vein grafts in enhancing peripheral nerve regeneration. Conclusion： This study suggest that both kinds of vein grafts play positive roles in facial nerve regeneration after being repaired immediately, but the autogenous inside-out vein grafts might accelerate and facilitate axonal regeneration as compared with control.     

胸腔镜辅助直视下经胸切取膈神经的解剖学研究及临床应用

目的 对膈神经胸腔内的全程解剖关系进行研究,为胸腔镜辅助直视下经胸切取全长膈神经、移位治疗臂丛神经根性损伤提供解剖学依据.方法 选用10%甲醛固定成人尸体标本10具20侧,对膈神经及其周围组织器官进行解剖学观察.临床上对17例臂丛神经损伤患者,于胸腔镜辅助直视下经胸切取膈神经的术式进行总结.结果 经锁骨下第二肋间腋前线处出口引出胸腔膈神经远端在上臂的位置比:左侧(38.60±13.10)%,右侧(52.40±7.90)%.经锁骨上切口引出膈神经远端在上臂的位置比:左侧(25.90±11.50)%,右侧(39.00±6.90)%.切口内缘至胸膜顶处膈神经长度(d)与胸膜顶至膈肌顶长度(f)的比值:第三肋间左侧(0.84±0.23),右侧(0.96±0.15);第四肋间左侧(1.02±0.21),右侧(1.08±0.17).切口内缘至膈神经入肌点长度(e)与胸膜顶至膈肌顶长度(f)的比值:第三肋间左侧(0.66±0.15),右侧(0.60±0.21);第四肋间左侧(0.55±0.04),右侧(0.44±0.05).17例臂丛神经根性损伤患者,经胸腔镜辅助直视下经胸切取全长膈神经移位桥接同侧肌皮神经,术后患者均未出现并发症,肱二头肌肌力恢复(肌力M2～M4).结论 膈神经在胸腔内的解剖特点适合进行经胸全长游离.胸腔镜辅助直视下经胸切取全长膈神经移位操作简单,安全性高,特殊设备要求低,可作为常规手术开展.

Abstract：

Objective To study the anatomic relationship of the thoracic phrenic nerve and provide anatomic basis for harvesting whole length phrenic nerve under direct vision using thoracoscope in the treatment of brachial plexus root injuries. Methods The anatomy of thoracic phrenic nerve and its surrounding tissues were observed on 20 sides of 10 adult cadavers which were embalmed by 10% formalin. Video-assisted thoracoscopic transthoracic phrenic nerve harvesting was carried out in the surgical treatment of 17 cases of brachial plexus injuries. The results in these cases were summarized. Results If the cutting end of phrenic nerve was pulled out of the second intercostal space at the anterior axillary line,the ratio of its location in the upper arm was (38.60±13.10)% on the left side and (52.40±7.90)% on the right side. If the cutting end was pulled out of the thoracic outlet,the location ratio in the upper arm was (25.90±11.50)% on the left side and (39.00±6.90)% on the right side. The ratio of phrenic nerve between d (length from medial edge of the incision to the pleural top) and f (length from pleural top to the top of diaphragm) was (0.84±0.23) on the left and (0.96±0.15) on the right at third intercostal space,(1.02±0.21) on the left and (1.08±0.17) on the right at the fourth intercostals space. The ratio of phrenic nerve between e (length from medial edge of the incision to the insertion of diaphragm) and f (length from pleural top to the top of diaphragm) was (0.66±0.15) on the left and (0.60±0.21) on the right at third intercostal space,(0.55±0.04) on the left and (0.44±0.05) on the right at the fourth intercostals space. Endoscopic-assisted transthoracic phrenic nerve harvesting in 17 cases of brachial plexus root injuries obtained full length of the phrenic nerve that could be directly coapted to the muscle branch of the musculocutaneous nerve. No complications were noted.The strength of the biceps underwent good recovery,which was M2 to M4. Conclusion The phrenic nerve in the thoracic cavity is suitable for full-length dissection based on the anatomical characteristics. Endoscope-assisted transthoracic phrenic nerve harvesting is a simple and safe surgery with low requirement of special equipment,and can be carried out as a routine surgery.     

成人间右半肝活体肝移植的肝动脉重建

Objective To summarize our experience in hepatic artery reconstruction in adult-to-adult right lobe living donor liver transplantation(LDLT).Methods A retrospective analysis was made for 17 cases undergoing LDLT in our center from May 2007 to Oct 2008.Results All the 17 right lobe graft of the liver was supplied by single right hepatic artery and the mean diameter of right hepatic artery was 3.1 mm.The hepatic artery for segment 4 was mainly originated from left hepatic artery(12/17,70.1%).The recipient right or left hepatic artery was used in 14 cases of reconstruction,proper hepatic artery was used in 2 cases,and gastroduodenal artery was used in one case.Anastomosis was performed with interrupted 8-0 prolene and 12-16 stitches were made on the posterior wall first and then the anterior wall to avoid turning over the vessel.The mean anastomosis time was(51±26) minutes and all hepatic arteries were patent immediately after anastomosis.Hepatic arterial complications including hepatic artery thrombosis (HAT)did not occur after LDLT.Conclusions Detailed evaluation and careful protection of the hepatic artery of segment 4 are the key to successful reconstruction of hepatic artery in LDLT.Anastomosis was performed without flipping the artery wall helped to reduce the difficulty of operation remarkably and with a good result.     

活体小鼠坐骨神经的形态学观察

Objective To observe the ultrastructure of sciatic nerve of GFP transgenic mice under normal and damaged conditions as well as to explore the applications of laser scanning confocal micoscope for in vivo and real time observation of peripheral nerve morphology. Methods The GFP mice were anesthetized and the sciatic nerve was exposed.The mouse was then mounted on the platform of a laser scanning confocal microscope in a way that the nerve was in direct contact with the slide for real time morphological observation in vivo.The diameters of the nerve trunk,nerve fascicles and nerve fibers were measured and the number and morphology of nerve fascicles and nerve fibers were reconted.Then the sciatic nerve was subjected to crush or transection to create a nertve iniury model.Morphological changes of the nerve proximal to,at and distal to the injury site were observed immediately after the injury and 2 hours later by laser scanning confoeal microscope in vivo. Results The diameter of normal sciatic nerve trunk of mice was about 800 μm,the diameter of nerve fascicle and nerve fiber Were 70 to 100 μm and 7.5 μm respectivdy.Each normal sciatic nerve trunk contained about 2 tiscicles and 70 to 200 nerve fibers.Immediately after and 2 hours after nerve injury vaeuolization was seen at the nerve proximal to the injury site.The nerve fibers were:disoriented and disconnection of the fibers was also seen.Nerve fibers of the nerve at the injury site were distorted,with vacuolization and breaking down of the fibers.Nenve continuity was lost.At the nerve 250 μm and 500 μm distal to the injury site,the nerve fiber fluoescence intensity gradually increased and the nerve fiber structure restored gradually.Orientation of the fibers tended to be organized. Conclusion The use of GFP transgenic mice and laser scanning confocal microscope provides a technical platform for in vivo real time observation of peripheral nerves.It can be applied to observe the morphological features and changes of mouse peripheral nerves.     

颞骨内面神经水平段的显微解剖

目的 研究颞骨内面神经水平段及其毗邻结构的显微解剖,为临床应用提供解剖学资料. 方法 通过模拟l临床经乳突入路的手术方法,分层解剖20个成人湿头颅标本(40侧颞骨),显露并观测颞骨内面神经水平段及其毗邻结构. 结果 面神经水平段的长度为[(8.85±1.01)(7.10～11.25)]mm、直径为[(1.88±0.65)(1.55～1.90)]mm;FN水平段与垂直段的夹角(向前)为[(115.5±6.89)(109.5～128.6)°;面神经水平段与鼓室天盖的夹角(向后)为[(28.5±3.66)(25.8～31.5)°;匙突至面神经水平段的垂直距离为[(1.89±0.58)(0.90～3.05)]mm;镫骨头至面神经水平段(垂直距离)为[(2.30±0.85)(1.97～3.11)]mm;锥曲段顶点到砧骨短脚尖的距离为[(2.55±0.21)(2.10～2.90)]mm;锥曲段顶点至外半规管隆突距离为[(2.86±0.31)(2.23～3.56)]mm;未发现面神经水平段有分支的或者移位的情况.面神经水平段的远段位于水平半归管隆突的前内侧.有2侧(2/40)水平段的远段位于外半规管隆突外侧0.89 mm和1.02 mm,占5%. 结论 膝状神经节、匙突、镫骨、鼓室天盖、水平半规管、砧骨是手术中确定FN水平段的重要标志.颞骨内面神经水平段与其毗邻结构的空间位置关系复杂,手术操作必须熟悉面神经水平段上述定位标志,以免损伤面神经.     

联合上颈段经颈静脉孔区入路的显微解剖学研究

目的 研究颈静脉孔区(JF)入路的显微解剖,利用该入路一期切除颅内外沟通型复杂病变.方法 成人尸头标本15例(30侧),在手术显微镜下进行联合上颈段经JF区入路的解剖操作,测量相关数据.结果 对C1～C4上颈段解剖,切除C1横突,游离椎动脉C1～C2段及水平段;充分切除颈静脉结节、颈静脉突及部分枕骨髁;迷路后切除乳突,显露半规管,轮廓化面神经垂直段,全程暴露乙状窦,打开颈静脉孔;扩大了JF区的显露并测得相关参数,如乳突尖间距枕髁外缘中点为(29.65±3.24)mm;枕髁后缘距舌下神经管内口为(10.10±0.81)mm;颈静脉球距面神经垂直段间距左为(6.8±0.35)mm,右为(4.6±0.33)mm.结论 此入路从多个方向对JF区充分暴露,使面神经、耳蜗、椎动脉、后组脑神经等结构得到保护,术中结合相关解剖参数可很好的完成一期全切JF区颅内外沟通型及延伸到上颈位的病变,提高治愈率、减少并发症、降低死亡率.     

下颈椎前路椎弓根螺钉内固定解剖学测量及临床应用

 目的 通过解剖学测量和临床应用, 探讨下颈椎前路椎弓根螺钉置入的可行性、安全性 及其临床疗效。方法 对 20具成人颈椎标本通过 CT扫描后进行数据测量, 内容包括: 椎体高度、椎体 前后径、椎体宽度、椎弓根横径、椎弓根高度、螺钉长度、横切面角度、矢状面角度、横切面进针点距离、 矢状面进针点距离, 确定进针点, 并进行尸体标本置钉。根据测量数据和术前影像学检查对 5例颈椎骨 折脱位患者行下颈椎前路椎弓根螺钉固定植骨融合术, 术后观察复位及螺钉位置情况及短期随访结 果。结果 横切面角度从 Cxiaobiaokaishi3xiaobiaojieshu(45.7°±4.0°)至 Cxiaobiaokaishi5xiaobiaojieshu(52.1°±5.9°)逐渐增大, 至 Cxiaobiaokaishi6xiaobiaojieshu(47.8°±6.7°)、Cxiaobiaokaishi7xiaobiaojieshu(44.4°±8.3°)又 有所减小。矢状面角度从 Cxiaobiaokaishi3xiaobiaojieshu(93.4°±7.2°)至 Cxiaobiaokaishi6xiaobiaojieshu(112.1°±6.2°)逐渐增大, 至 Cxiaobiaokaishi7xiaobiaojieshu(102.7°±8.5°)又有所减小。横 切面进针点 Cxiaobiaokaishi3xiaobiaojieshu~Cxiaobiaokaishi5xiaobiaojieshu位于椎弓根对侧, Cxiaobiaokaishi6xiaobiaojieshu~Cxiaobiaokaishi7xiaobiaojieshu位于椎弓根同侧;矢状面进针点距离 3.4~7.5 mm。 5例患者术 中减压彻底, 螺钉均位于椎弓根钉道内, 日本骨科协会评分(Japanese Orthopaedic Association Scores, JOA)均有不同程度地提高。结论 下颈椎前路椎弓根螺钉的理想进针点位于距上终板 5 mm左右, 椎 体前正中线附近。横切面角度约为 45.7°~52.1°, 矢状面角度约为 93.4°~112.1°。螺钉长度约为 32 mm。     

The projection of nerve roots on the posterior aspect of spine from t11 to L5: a cadaver and radiological study

STUDY DESIGN.: A cadaver and radiological study. OBJECTIVE.: To investigate the projection of nerve roots on the posterior aspect of the spine from T11 to L5. SUMMARY OF BACKGROUND DATA.: Understanding the projection of nerve roots on the posterior lamina will help to determine the decompressing areas of lamina and avoiding unnecessary bony resection. It can prevent segmental instability and postoperative scar formation. No studies regarding this subject are available. METHODS.: Fifteen formalin-preserved spine specimens were used for this study. After exposing the dural sac and bilateral nerve roots, small pieces of stainless steel wires were placed along the root sleeves from their points of origin, and then standard anteroposterior and lateral radiographs were taken. Parameters were measured directly on radiographs using the picture archiving communication system. Measurements included: (1) take-off angles of the nerve roots at the coronal (CA) and sagittal planes (SA); (2) distance from the origin of the root sleeve to the posterior midline (DM); (3) distance from the origin of the root sleeve to the superior (DS) and inferior margin (DI) of its corresponding lamina; and (4) distance between the origins of neighboring nerve roots (DR). RESULTS.: The CA statistically decreased from T11 (52.4° ± 3.13°) to L5 (25.8° ± 3.10°). An opposite variation tendency was observed in SA. The DS increased from 1.8 ± 0.32 mm for T11 to 5.84 ± 1.05 mm for L5. No consistent change was found at DI. The DR was largest at the L1-L2 interval (33.9 ± 1.40 mm) and it decreased progressively to L4-L5 (25.5 ± 2.40 mm). DM statistically increased from T11 (8.9 ± 1.51 mm) to L1 (10.9 ± 1.11 mm) and then progressively decreased until it reached a minimum at L5 (8.1 ± 0.83 mm). CONCLUSION.: The precise projection of nerve roots to the posterior aspect of spine and intraspinal take-off angles at the sagittal plane have been presented. Surgical interventions of the lumbar disc and nerve root may benefit from this quantitative anatomical study.     

短节段固定融合术治疗退变性腰椎侧凸合并腰椎管狭窄疗效观察

目的探讨短节段固定融合术治疗退变性腰椎侧凸(DLS)合并腰椎管狭窄的手术策略、影像学及临床疗效。方法选择性减压、短节段固定融合术治疗68例DLS合并腰椎管狭窄患者,比较患者术前及末次随访时的Cobb角、腰椎前凸角、冠状面躯干偏移及矢状面躯干偏移。以Oswestry功能障碍指数(ODI)评估患者功能改善情况。结果患者均获得随访,时间36~60个月。Cobb角术前12°~28°(15.9°±4.6°),末次随访3.6°~9.8°(5.2°±3.1°);腰椎前凸角术前1.2°~3.3°(1.9°±2.9°),末次随访-28.1°~4.6°(-23.6°±3.7°);冠状面躯干偏移术前8.2~13.7(10.8±5.2)mm,末次随访2.8~5.6(4.3±1.8)mm;矢状面躯干偏移术前10.2~15.6(12.6±3.7)mm,末次随访3.1~6(4.6±2.2)mm;ODI评分术前25.2~29.8(27.6±2.1)分,末次随访2.1~4.2(3.6±1.3)分。以上各项指标末次随访与术前比较差异均有统计学意义(P0.05)。术后早期并发症发生率为7.3%。末次随访时未发现钉棒松动或断裂等情况。结论对于冠状面Cobb角30°且躯干失平衡较小的DLS合并腰椎管狭窄患者,行选择性减压、短节段固定融合可获得良好的中期临床疗效。     

Image-guided localization of the internal auditory canal via the middle cranial fossa approach.

OBJECTIVE: We sought to determine the accuracy of an electromagnetic image guidance surgical navigation system in localizing the midpoint of the internal auditory canal (IAC) and other structures of the temporal bone through the middle cranial fossa approach. MATERIALS AND METHODS: Seven fresh cadaveric whole heads were dissected via a middle cranial fossa approach. High-resolution CT scans were used with an InstaTrak 3500 Plus electromagnetic image guidance system (General Electric, Fairfield, CT). We evaluated the accuracy of identifying several middle cranial fossa landmarks including the midpoint of the IAC; the labyrinthine segment of the facial nerve; and the arcuate eminence, the carotid artery, and foramen spinosum. RESULTS: We were able to identify the middle of the IAC within 2.31 mm (range 0.65-7.52 mm, SD 2.39 mm). The arcuate eminence could be identified within 1.86 mm (range 1.49-2.37 mm, SD 0.36 mm). We noted some interference when the handpiece was within 6 to 8 cm of the microscope. CONCLUSION: Although computer-aided navigational tools are no substitute for thorough knowledge of temporal bone anatomy, we found the InstaTrak system reliable in identifying the midpoint of the IAC to within 2.4 mm through a middle fossa approach.     

MRI of the facial nerve during paralysis

Gadolinium-enhanced MRI was used to evaluate 10 patients with Bell's palsy and one patient with facial paralysis secondary to Lyme disease. Nine of the eleven patients showed increased signal intensity of their facial nerve with gadolinium-enhanced MRI. In all nine patients, the facial nerve was involved at the labyrinthine, geniculate ganglion and proximal tympanic portions of the facial nerve, while two of the nine patients also had involvement of the mastoid segment of the facial nerve. Patients whose facial nerve enhancement was limited to the labyrinthine, geniculate ganglion and proximal tympanic facial nerve ultimately had complete return of facial function. Patients whose facial nerve enhanced in the mastoid segment experienced incomplete return of facial function. Gadolinium is effective in localizing the site of inflammation during facial paralysis. Those patients with enhancement localized to the labyrinthine, geniculate ganglion and proximal tympanic segments were more likely to regain complete facial function. In contrast, patients who had enhancement of the mastoid segment of the facial nerve had poorer prognoses for complete return of facial function.     

A reliable radiologic landmark for the facial nerve in axial temporal bone computed tomography scans.

OBJECTIVE: We sought to test the reliability of a radiologic marker in identifying the vertical portion of the facial nerve in axial computed tomography (CT) temporal bone scans. STUDY DESIGN AND SETTING: At a tertiary care academic center, we used, with a random sample of 25 CT scans, a marker (the "B-line") to identify the facial nerve. The variations in distance from this marker to the facial nerve were measured. RESULTS: This marker, which consists of a tangent line extrapolated from the posterior border of the basal turn of the cochlea, fell within 1 mm of the facial nerve on average. The average distance from the midpoint of the posterior border of the basal turn of the cochlea to the facial nerve was 11 +/- 1 mm. CONCLUSION: This is a very reliable marker for the vertical portion of the facial nerve. SIGNIFICANCE: This marker can be used to rapidly find the facial nerve, even in diseased or postsurgical temporal bones.     

3D打印钛合金椎间融合器置入治疗脊髓型颈椎病的临床疗效及颈椎矢状位参数变化

目的 探讨3D打印钛合金椎间融合器(3D Cage)置入治疗脊髓型颈椎病的临床疗效及颈椎矢状位参数变化.方法 回顾性研究我院2018年7月至2020年1月收治的接受单节段颈椎前路椎间盘切除植骨融合术(anterior cervical discectomy and fusion,ACDF)的脊髓型颈椎病病人39例,按照...     

Intrinsic vasculature of the labyrinthine segment of the facial nerve--implications for site of lesion in Bell's palsy

Recent studies of the intrinsic vasculature of the cat facial nerve have demonstrated relatively poor blood supply to the labyrinthine segment. In this study, the intrinsic vasculature of the human facial nerve was systematically evaluated in 25 temporal bones and three fresh cadaver nerves. Cross-sectional vessel counts were obtained for the labyrinthine, tympanic, and mastoid segments. Capillary densities for each segment were derived from these data. The labyrinthine segment of the human facial nerve, like that in the cat, contains fewer and smaller intrinsic blood vessels than do the mastoid and tympanic segments. This may indicate that the labyrinthine segment of the facial nerve may be more vulnerable to ischemic damage. In conjunction with the previously demonstrated narrowness of the labyrinthine fallopian canal, these findings support the contention that the labyrinthine segment is a likely site of lesion in Bell's palsy.