肝素抗凝治疗急性冠脉综合征的对比研究

目的观察不同抗凝方案治疗急性冠状动脉综合征（ACS）的疗效和安全性。方法入选对象为不稳定性心绞痛或非Q波心肌梗死患者，入选前48h以内至少有一次心绞痛发作，ST段无抬高。将120例入选病例随机分为静脉滴注普通肝素（UH）组和皮下注射低相对分子质量肝素（LMWH）组，UH组以UH240u／kg·d^-1分两次静脉滴注，连续10d，维持aPTT于60-85s或ACT于250-300s（正常值1．5-2．5倍）。LMWH组予LMWH5000μ，每日两次，皮下注射，连续10d。观察终点：随访治疗30d内发生急性心肌梗死、心脏性或非心脏性死亡和药物治疗无法控制的心绞痛需血运重建例数。住院治疗至少10d，随访至治疗后30d。结果两组用药期间平均胸痛发作次数差异无显著性，但肝素组有更多的患者需口服硝酸甘油缓解胸痛；死亡率、复合终点事件（死亡、心肌梗死和药物治疗无法控制的心绞痛）在LMWH组明显下降。LMWH组出血事件明显少于UH组。结论LMWH皮下注射与连续静脉滴注UH疗效相似，LMWH可明显减少急性冠状动脉综合征30d后死亡和复合心脏事件的发生，发生出血事件较少，应用更为方便安全。     

实验性角膜非特异性炎症反应的病理形态学研究

目的　探讨非特异性角膜炎症反应中朗格罕氏细胞(LC)形态的成熟与角膜炎症细胞浸润的相关性。方法　建立BALB/C鼠角膜缝线及合并结膜下药物注射的动物模型,观察各组角膜术后1、3、7、1 4d临床、病理组织学改变,及不同时相点各组角膜中央LC的数量、形态。结果　缝线组和结膜下细菌脂多糖(LPS)注射组角膜炎症细胞浸润,角膜中央LC的数量、树突状突起均明显高于对照组和合并NF- kB抑制剂四氢吡咯-二硫代氨基甲酸酯(PDTC)结膜下注射组。结论　角膜非特异性炎症反应程度可能与LC的成熟与否有关,LC形态的成熟可部分被核因子NF- Kb抑制剂PDTC所阻断。     

特发性脉络膜新生血管自发消退五例临床观察

脉络膜新生血管(CNV)疾病通常会逐渐加重并以瘢痕形成而导致黄斑功能的持续损害.但我们在近年的临床工作中观察到5例特发性脉络膜新生血管(ICNV)患者在未接受任何治疗的情况下CNV自行消退的现象,现报道如下. 1 对象和方法 2009年至2011年临床诊断为ICNV未接受任何治疗,CNV病灶自行萎缩消退的患者5例5只眼.患者均为女性,年龄23～45岁,平均年龄32岁.     

播散性单侧亚急性神经视网膜炎一例

患者男,37岁.因右眼前线形黑影10 d,于2007年7月11 日来我院就诊.既往健康,无家族遗传病史,无眼病史,无宠物接触史,无不洁饮食史,无疫区居住史.眼部检查:右眼视力0.1,矫正不应;左眼视力1.0.右眼相对性瞳孔传人障碍(+),余双眼前段未见异常.     

影像增强X线荧光屏下动态观察眼球内异物28例

目的探讨X线动态观察眼球内异物的价值.方法借助影像增强X线荧光屏动态观察眼球内异物分辨金属及非金属异物.结果 28例中分辨出金属异物25例,均经手术异物取出证实.结论影像增强X线荧光屏下动态观察异物简便、费用低廉、结果准确,有一定实用价值.     

心肌梗死前不同时期心绞痛对急性心肌梗死近期预后的影响

目的：探讨急性心肌梗死（ＡＭＩ）前２４ｈ前心绞痛对初次ＡＭＩ患者近期预后的影响。方法：１３４例未接受溶栓等再灌注治疗的初次ＡＭＩ（Ａ组）病人按梗死前２４ｈ（Ａ组）和２４ｈ前心绞痛发作（Ｂ组）及无心绞痛（Ｃ组）分为３组，回顾分析住院期间的临床资料。结果：Ａ组和Ｂ组梗死面积较小，并发症较少，近期预后好，血浆肌酸磷酸激酶及其同工酶，住院期间心力衰竭，心律失常，心源笥休克，近期心源性死亡与Ｃ组对照有显著差     

Neurogenic differentiation of murine adipose derived stem cells transfected with EGFP <Emphasis Type="Italic">in vitro</Emphasis>

Some studies indicate that adipose derived stem cells(ADSCs)can differentiate into adipogenic,chondrogenic,myogenic,and osteogenic cells in vitro.However,whether ADSCs can be induced to differentiate into neural cells in vitro has not been clearly demonstrated.In this study,the ADSCs isolated from the murine adipose tissue were cultured and transfected with the EGFP gene,and then the cells were induced for neural differentiation.The morphology of those ADSCs began to change within two days which developed i...     

Synthesis and characterization of UPPE-PLGA-rhBMP2 scaffolds for bone regeneration

A novel unsaturated polyphosphoester(UPPE) was devised in our previous research,which is a kind of promising scaffold for improving bone regeneration.However,the polymerization process of UPPE scaffolds was unfavorable,which may adversely affect the bioactivity of osteoinductive molecules added if necessary,such as recombinant human bone morphogenetic protein-2(rhBMP2).The purpose of this study was to build a kind of optimal scaffold named UPPE-PLGA-rhBMP2(UPB) and to investigate the bioactivity of rhBMP2 in this scaffold.Furthermore,the cytotoxicity and biocompatibility of UPB scaffold was assessed in vitro.A W1/O/W2 method was used to fabricate PLGA-rhBMP2 microspheres,and then the microspheres were added to UPPE for synthesizing UPB scaffold.The morphological characters of PLGA-rhBMP2 microspheres and UPB scaffolds were observed under the scanning electron microscopy and laser scanning confocal microscopy.The cumulative release of UPB scaffolds was detected by using ELISA.The cytotoxicity and biocompatibility of UPB scaffolds were evaluated through examining the adsorption and apoptosis of bone marrow stromal cells(bMSCs) seeded on the surface of UPB scaffolds.The bioactivity of rhBMP2 in UPB scaffolds was assessed through measuring the alkaline phosphates(ALP) activity in bMSCs seeded.The results showed that UPB scaffolds sequentially exhibited burst and sustained release of rhBMP2.The cytotoxicity was greatly reduced when the scaffolds were immersed in buffer solution for 2 h.bMSCs attached and grew on the surface of soaked UPB scaffolds,exerting well biocompatibility.The ALP activity of bMSCs seeded was significantly enhanced,indicating that the bioactivity of rhBMP2 remained and still took effect after the unfavorable polymerization process of scaffolds.It was concluded that UPB scaffolds have low cytotoxicity,good biocompatibility and preserve bioactivity of rhBMP2.UPB scaffolds are promising in improving bone regeneration.     

Rigidfix系统固定重建前交叉韧带的疗效比较

目的 探讨关节镜下应用Rigidfix系统及挤压螺钉固定重建前交叉韧带(ACL)的临床效果及自体与同种异体肌腱重建的疗效比较.方法 2005年7月～2008年5月对该院共42例关节镜下确诊的ACL断裂的患者行双骨道单束自体肌腱或同种异体肌腱韧带重建治疗,应用Rigidfix系统及挤压螺钉对重建韧带进行固定,术后完成相关随访,随访主要包括关节活动度,膝关节查体,MRI影象等,功能评定采用Lysholm评分系统.结果 所有患者随访1.5～4.0年,平均2.8年.其中1例出现术后感染的患者膝关节屈曲受限外,余患者末次随访所有膝关节伸-3°～0°,屈110°～130°,2例患者前抽屉试验、Lachman试验为阳性,Lysholm评分由术前(34.6±4.36)分提高至术后(89.4±5.42)分.采用自体肌腱重建患者Lysholm评分由术前(32.4±6.95)分提高至术后(91.3±5.51)分,同种异体肌腱重建患者由术前(35.6±4.49)分提高至术后(90.2±6.32)分,两组患者功能比较差异无显著性(P＞0.05).结论 关节镜下应用Rigidfix系统及挤压螺钉固定自体及同种异体肌腱重建前交叉韧带均可获得较为满意的临床疗效.     

Total spondylectomy of C2 and circumferential reconstruction via combined anterior and posterior approach to cervical spine for axis tumor surgery

As a result of the complex anatomy in upper cervical spine, the operative treatment of axis neoplasms is always complicated. Although the procedure for the second cervical vertebra (C2) surgery had been described previously in diverse approaches and reconstruction forms, each has its own limita- tions and restrictions that usually result in less satisfactory conclusions. The purpose of this study was to evaluate the operation efficacy for axis tumors by using a combined anterior (retropharyngeal) cervical and posterior approach in achieving total resection of C2 and circumferential reconstruction. Eight con-secutive C2 tumor patients with mean age of 47.6 years in our institute sequentially underwent vertebra resection and fixation through aforementioned approach from Jan. 2006 to Dec. 2010. No surgical mortality or severe morbidity occurred in our group. In terms of complications, 2 cases developed transient difficulty in swallowing liquids (one of them experienced dysphonia) and 1 developed cerebrospinal fluid leakage (CSFL) that was resolved later. During a mean follow-up period of 31.9 months, the visual analogue scale (VAS) and Japanese orthopedic association (JOA) score revealed that the pain level and neurological function in all patients were improved postoperatively, and there was no evidence of fixation failure and local recurrence. It is concluded that the anterior cervical retropharyngeal approach permits a visible exposure to facilitate the C2 vertebra resection and perform an effective anterior reconstruction at the same time. The custom-made mesh cage applied in our cases can be acted as a firm and convenient implant in circumferential fixation.