ACDF钢板固定术与ZERO-P内固定术对颈椎病的疗效比较

目的比较前路ACDF钢板内固定术(A组)与ZERO-P内固定术(B组)治疗单节段颈椎病的疗效。方法对我科2011年6月~2013年1月期间42例颈前路椎间融合术的颈椎病患者进行回顾性分析。评价指标:症状改善、影像学、手术时间及术中出血。结果 38例患者术后获得随访14~28个月,平均22个月。24例A组用时(70±10)分钟,14例B组约为(55±10)分钟,术中出血量均约为40~60ml,两组手术时间差异有统计学意义(0.05),术中出血量差异无统计学意义(0.05)。两组术后JOA和VAS评分,差异有统计学意义(0.05),但同期两者比较差异无统计学意义(0.05)。两组术后X片表现差异无统计学意义(0.05),但术后1年邻近椎体间退变有统计学意义(0.05)。结论两种手术均能获得满意的临床疗效,出血量少,术野清晰,创伤小,术后并发症少。但颈前路ZERO-P内固定术相较于钢板内固定术更有优势,前者在保证同样的手术疗效的同时,且具有手术时间短,暴露范围小,操作简便,确切的固定效果。     

利用重组人骨形态发生蛋白-2诱导椎间盘成骨的实验研究

目的确定在兔子的椎间盘内注射重组人骨形态发生蛋白-2（recombinant human bone morphogenetic protein-2，rhBMP-2）诱导椎体间融合的可行性。方法将24只成年新西兰大白兔，随机分为2组，每组12只。用微量注样器将含有rhBMP-2200μg的生理盐水溶液20μl和等量的生理盐水分别注射到成年新西兰大白兔的L4～5椎间盘的髓核内。术后10、30、60及90天进行X线照相和组织学检查。结果注射椎间盘未见免疫排斥反应。实验组可见纤维环和软骨终板成骨并在相邻椎体间形成骨桥。对照组的椎间盘内未见骨形成。结论利用注射的方法，rhBMP-2可诱导椎间盘成骨，达到椎体间融合的目的。     

骨圈对椎弓根钉系统负载影响的三维有限元分析

目的：探讨单枚人体皮质骨圈(allograft fusion cage，AFC)斜植融合术中椎弓根钉系统受力分布，并对临床常见断钉原理进行分析，为临床应用提供理论依据。方法：采用二三维有限元方法(finite element method，FEM)，对放置及不放置AFC的脊柱Steffee钢板固定效果进行评估。结果：未放置AFC时Steffee钢板所受最大应力约为放置AFC状态下的4．8倍；椎弓根钉与螺帽交界处所受应力为最大，尤其上位螺钉与靠近椎体侧螺帽交界处是应力值最大点，未放置AFC时椎弓根钉最大应力点约为放置AFC状态下的5．0倍。结论：螺钉与钢板交界区是容易发生断钉的区域，尤其上位螺钉与靠近椎体侧螺帽交界处是最易断钉的部位；椎弓根钉系统放置AFC会明显增强融合节段稳定性，减少断钉等并发症。     

Quantitative analysis of paradoxical inward rib cage movement during sleep in children

Paradoxical inward rib cage movement in children is quantified by the labored breathing index (LBI) on the respiratory inductive plethysmography. Labored breathing index during rapid eye movement sleep (REMS) in 59 children without obvious sleep disordered breathing (SDB) declined with age, and decreased to the mature low level at 35 months of age. The LBI was also found to reflect well the severity of SDB. Paradoxical inward rib cage movement, which was quantified by LBI, is concluded to be an important finding in diagnosing SDB in child patients.     

钛钢螺纹椎体融合器治疗退行性腰椎间盘突出症的远期疗效观察

目的　观察钛钢螺纹椎体融合器 (TFC)手术治疗退行性腰椎间盘突出症的远期疗效。方法　选择 36例腰椎间盘突出症患者 ,随机分为 2组各 18例 ,治疗组采用TFC手术治疗 ,对照组采用单纯椎板开窗、髓核摘除术治疗。治疗后进行融合率、椎间隙高度、椎间孔高度观测和主、客观疗效评价。结果　治疗组椎体融合率达 94 % ,术后椎间隙高度及椎间孔高度增加 ,远期随访无明显丢失 ,临床疗效主客观评估均优于对照组。结论　TFC治疗退行性腰椎间盘突出症 ,可以有效地撑开或保持受累椎间隙 ,扩大椎间孔 ,有利于骨融合 ,可缓解疼痛 ,其远期疗效可靠。     

睡安口服液对小鼠镇静作用研究

目的:研究睡安口服液对小鼠的镇静作用。方法:通过抖笼换能器法,设置睡安口服液组与对照组,以活动曲线研究睡安口服液对Wistar种系小鼠的镇静作用。结果:对照组在给药前后有大波、中波出现,睡安口服液组可使小鼠活动明显减少,灌胃后20min大波完全消失,中波大部分消失,小波也减少。结论:说明该制剂镇静作用显著。     

兔感染性模型组织液中左氧氟沙星浓度HPLC测定

目的建立兔组织感染性模型组织液中左氧氟沙星药物浓度的高效液相色谱分析方法。方法以加替沙星为内标,室温下兔组织液样品15%高氯酸沉淀蛋白后,离心后取上清液进样测定。色谱柱为ZORBAXSB-C18(150mm×4.6mm,5μm)。流动相为0.05mol/L磷酸二氢钾∶乙腈∶三乙胺(82∶18∶0.3,V/V/V),pH4.5,流速1ml/min,荧光检测激发波长298nm,发射波长458nm。结果线性范围0.025～3.0μg/ml(r=0.9999)。低、中、高浓度的绝对回收率均大于76%,相对回收率在97%～104%,日内、日间RSD分别小于2%和4%。最低检测浓度为0.025μg/ml,最低检测限为2ng/ml,S/N>3。本方法准确可靠,操作简便,适用于体内生物样品测定。     

后路cage椎体间植骨融合术在下腰椎融合的应用

目的 探讨后路cage椎间植骨融合术治疗下腰椎疾病的应用价值。方法 运用后路cage椎间植骨融合术治疗腰椎间盘突出症10例，单纯腰椎滑脱症11例，腰椎管狭窄症3例，腰椎狭部不连2例。结果 术后经6。12个月随访，临床疗效优良率92．3％(优80．8％，良11．5％)，植骨融合率96％，短时神经功能障碍1例。结论 后路cage椎间植骨融合术是治疗下腰椎不稳或滑脱的有效方法，临床疗效满意。     

椎弓根螺钉内固定联合Cage治疗腰椎滑脱症

目的探讨后路椎弓根螺钉内固定联合椎间融合器(Cage)治疗腰椎滑脱症的疗效。方法分析自2000年4月~2003年12月,采用后路椎管及神经根管减压,短节段椎弓根系统固定联合Cage治疗腰椎滑脱症共12例,按M eyer-d ing分度:Ⅰ°滑脱7例,Ⅱ°滑脱4例,Ⅲ°滑脱1例。术后随访2~4.5年,平均3.2年。结果12例患者椎体间骨性融合率1年89%,2.3年达100%,优良率为91.7%。结论采用椎弓根内固定系统结合Cage治疗腰椎滑脱效果良好,二者能够相互协同,相互促进,符合腰椎生物力学的要求,是治疗腰椎滑脱症的有效方法之一。     

Could self-locking stand-alone cage reduce adjacent-level ossification development after aneterior cervical discectomy and fusion?

Numerous studies have shown that cervical arthrodesis is associated with the adjacent-segment pathology (ASP), such as adjacent-level ossification development (ALOD). However, it still remains largely unclear whether the self-locking stand-alone implant system can reduce the incidence of ALOD. In the present study, we prospectively recruited 120 patients with cervical degenerative disc disease (CDDD) who were treated by anterior cervical discectomy and fusion (ACDF). These patients were randomly and evenly divided into the ROI-C group and plate group. Clinical and radiologic follow-up was performed at 3, 6, 12, 24 and 36 months after surgery. Clinical evaluation included preoperative and postoperative assessments of Japanese Orthopaedic Association (JOA) score and Neck Disability Index (NDI) score. The presence and severity of ALOD, as well as the C2-7 Cobb angle, were assessed on the lateral cervical films during follow-up. There were no significant differences in JOA and NDI scores at each time point during the follow-up period between the two groups. ALOD occurred in 8.8% of 58 patients and 6.7% of 104 levels in the cage group. Moreover, ALOD occurred in 20.1% of 57 patients and 17.8% of 101 levels in the plate group. The ALOD was more serious in the plate group compared with the cage group. The C2-7 Cobb angle was significantly improved compared with that before the operation and could be maintained during the follow-up in both groups. The self-locking stand-alone cage was efficacious for ACDF, and it could reduce the incidence of ALOD compared with anterior plate and cage.