Vitapex糊剂在儿童年轻恒牙根尖诱导成形术中的应用

目的探讨Vitapex糊剂和氢氧化钙糊剂用于儿童年轻恒牙根尖诱导成形术的治疗效果。方法对85例儿童,98颗牙根尖发育未完成,牙髓病变已波及根髓、牙髓已坏死或并发根尖周炎的年轻恒牙分为2组,分别用Vitapex糊剂和氢氧化钙糊剂进行根尖诱导成形术,观察其根尖发育情况。结果Vitapex糊剂组总有效率为91.84%。氢氧化钙组总有效率为77.55%。2者疗效在统计学比较存在显著性。结论Vitapex糊剂作为一种根尖诱导成形剂具有良好的治疗效果。值得在临床推广应用。     

产前联合应用地塞米松与维生素K1预防早产儿脑室周围-脑室内出血的效果

目的探讨产前联合应用地塞米松(DEX) VitK1预防早产儿脑室周围-脑室内出血(PIVH)的疗效。方法将264例胎龄<35周早产儿随机分成3组:A组产前母亲应用DEX组133例,孕妇在分娩前静脉点滴DEX 10 mg/d,连用2 d。B组产前母亲联合应用DEX与VitK1组(DEX VitK1组)44例:孕妇在分娩前静脉点滴DEX外,给予VitK110 mg/d,连用2~7 d。C组分娩前母亲未用DEX和VitK1为对照组,共87例。婴儿出生后常规作头颅超声,了解是否存在PIVH及其程度。结果3组早产儿PIVH发生率分别为DEX组52.6%,DEX VitK1组31.8%,对照组65.2%,3组间有显著差异(χ2=13.469 P=0.001);DEX VitK1组重度PIVH发生率显著降低。结论产前联合应用DEX与VitK1能够显著降低早产儿PIVH的发生率,并减轻其程度。     

地塞米松对急性淋巴细胞白血病患儿核转录因子-κB表达的影响及意义

目的探讨儿童急性淋巴细胞白血病(ALL)核转录因子-κB(NF-κB)p65蛋白的表达及意义,观察地塞米松(DEX)对其活性的影响,为临床寻求以NF-κB为靶点的治疗手段的依据。方法1.应用SP免疫组化法,检测20例ALL患儿和20例正常对照儿童NF-κB p65蛋白表达。2.用SP免疫组化法检测DEX对ALL细胞NF-κB p65蛋白活性影响。结果1.ALL患儿20例的NF-κB p65蛋白阳性表达率为85.50%(17/20),表达定位于ALL细胞胞核及胞浆中,明显高于正常对照组10.0%(2/20),两者比较有显著性差异(χ2=22.56 P<0.01)。2.临床治疗剂量的DEX 5.0 mg/L作用于ALL细胞24 h,能显著抑制NF-κB p65蛋白表达,其阳性表达率为(25.0±3.0)%,与未处理的ALL细胞比较,有显著性差异(t=55.00 P<0.01)。结论1.NF-κB p65蛋白表达于儿童ALL细胞中。2.抑制NF-κB的活性可能是DEX作用于儿童ALL细胞的机制之一,抑制NF-κB信号传导途径可能在儿童ALL治疗中有重大价值。     

性分化与性发育异常13例分析

目的:探讨性分化和发育异常的临床特点,并对腹腔镜在治疗中的应用进行评价。方法:对我院13例行腹腔镜切除性腺的性分化和发育异常病例资料进行分析。结果:13例均为女性外阴,含有Y染色体或Y的成分,性腺位于腹腔内或腹股沟内,4例为条索状原始性腺,9例为睾丸。3例有始基子宫和输卵管。性激素水平符合绝经期表现。11例经腹腔镜完成手术,2例转传统手术,手术后1~2天出院。结论:含有Y染色体或Y成分的性腺位于腹腔或腹股沟内并且丧失正常功能,是手术切除的指征,腹腔镜手术具有微创和术后恢复快的优势。     

Validation of a computer-based bronchoscopy simulator developed in Taiwan.

BACKGROUND/PURPOSE: Conventional training in bronchoscopy may increase patient's discomfort and procedure-related morbidity. Computer-based bronchoscopy simulator (CBBS) permits the acquisition and evaluation of the necessary skills through a realistic bronchoscopic experience. This study was conducted to validate the use of a CBBS system developed in Taiwan as a learning and assessment tool. METHODS: Twenty novice bronchoscopists and 10 expert bronchoscopists were enrolled as subjects in this prospective study. The 20 novice bronchoscopists were randomized into two groups, which received conventional bronchoscopic training or CBBS training and then completed a satisfaction survey. Subsequently, the novices who received CBBS training underwent an observational performance trial and the results were compared with those of expert bronchoscopists. All 10 expert bronchoscopists completed a realism survey and observational trial after CBBS performance. RESULTS: The satisfaction survey showed that the CBBS training program significantly increased participants' satisfaction (p = 0.002) and interest in learning (p < 0.001). The realism survey by the 10 expert bronchoscopists indicated that CBBS provides a favorable degree of realism with regard to the mechanical and visual parameters examined. Analysis of the performance results showed that the following parameters were capable of differentiating the participants by level of expertise: total procedure time (p = 0.002), percentage of bronchial segments entered (p = 0.012), percentage of bronchial segments identified (p < 0.001), percentage of repeated bronchial segments entered (p = 0.004), percentage of pathologies identified (p < 0.001), number of times that the bronchoscope tip collided with airway walls (p = 0.013), and number of times oral instruction was needed (p = 0.01). CONCLUSION: CBBS is a valid training method that increases interest in learning and provides a favorable degree of virtual realism. It can also distinguish various levels of competence at actual bronchoscopy and may have a useful role in the bronchoscopic training curriculum.     

迟发性维生素K缺乏性颅内出血患儿血浆心钠素与低钠血症的关系

目的探讨迟发性维生素K缺乏性颅内出血患儿心钠素(ANP)水平变化与低钠血症的关系及其临床意义。方法应用放射免疫分析技术检测108例颅内出血患儿不同病程的血浆ANP水平,同时检测血清钠的含量,选取25例健康同龄儿作为对照。结果(1)颅内出血急性期血浆ANP水平均高于对照组(P<0·05);昏迷组患儿ANP升高更明显(P<0·01);(2)颅内出血患儿血浆ANP与血清钠水平呈负相关(γ=-0·748,P<0·05)。结论(1)迟发性维生素K缺乏性颅内出血患儿血浆ANP水平反映脑损伤严重程度;(2)ANP参与迟发性维生素K缺乏性颅内出血患儿低钠血症的形成过程。     

Brn-4在偏侧帕金森病大鼠模型纹状体中的表达变化

目的:探讨Brn-4在偏侧帕金森病大鼠模型纹状体中的表达变化。方法:用6-OHDA注入80只SD大鼠右侧前脑内侧束(medialforebrainbundle,MFB),行为学检测得成功PD模型48只,随机分成7d、14d、21d、28d4组,每组各12只。每组中的6只动物和6只正常对照大鼠的纹状体进行Brn-4Westernblot检测;另6只动物的纹状体进行Brn-4免疫组化染色。结果:Westernblot检测发现Brn-4的相对表达量(Brn-4/β-actin)正常对照组为0.123±0.02,7d组为0.538±0.04,14d组为0.192±0.05,21d组为0.122±0.02,28d组为0.084±0.02;而模型侧/正常侧纹状体Brn-4阳性细胞的比值7d、14d、21d和28d组分别为1.560±0.14,0.855±0.15,0.638±0.11和0.369±0.10。结论:PD大鼠模型纹状体中Brn-4蛋白于前脑内侧束注射6-OHDA后7d表达量急剧增高,而14d后则急剧下降,到28d时已低于正常水平。     

Immune responses against SARS-coronavirus nucleocapsid protein induced by DNA vaccine

The nucleocapsid （N） protein of SARS-coronavirus （SARS-CoV） is the key protein for the formation of the helical nucleocapsid during virion assembly. This protein is believed to be more conserved than other proteins of the virus, such as spike and membrane glycoprotein. In this study, the N protein of SARS-CoV was expressed in Escherichia coli DHSalpha and identified with pooled sera from patients in the convalescence phase of SARS. A plasmid pCI-N, encoding the full-length N gene of SARS-CoV, was constructed. Expression of the N protein was observed in COS1 cells following transfection with pCI-N. The immune responses induced by intramuscular immunization with pCI-N were evaluated in a murine model. Serum anti-N immunoglobutins and splenocytes proliferative responses against N protein were observed in immunized BALB/c mice. The major immunoglobulin G subclass recognizing N protein was immunoglobulin G2a, and stimulated splenocytes secreted high levels of gamma interferon and IL-2 in response to N protein. More importantly, the immunized mice produced strong delayed-type hypersensitivity （DTH） and CD^8＋ CTL responses to N protein.     

大孔吸附树脂分离肿节风中总黄酮的研究

目的考察11种大孔吸附树脂对肿节风总黄酮的吸附分离性能。方法采用静态吸附分离法确定适合的大孔吸附树脂;采用动态吸附分离法确定分离条件。以总黄酮吸附量、总黄酮质量分数和回收率为考察指标,采用紫外分光光度法测定总黄酮。结果HPD 400大孔吸附树脂对肿节风总黄酮有良好的吸附分离性能,其分离肿节风总黄酮的工艺条件为:肿节风总黄酮上样质量浓度为10 m g/mL,肿节风总黄酮最大吸附量为9.5 m g/mL,吸附体积流量为2.5 mL/m in,洗脱剂为70%乙醇,洗脱剂用量为3倍柱体积,树脂可重复使用3次。结论采用HPD 400大孔吸附树脂吸附分离肿节风总黄酮简便有效,总黄酮回收率为85%左右。     

输卵管线性切开术中局部预防性应用MTX的临床意义

目的 探讨输卵管妊娠腹腔镜保守性手术中局部预防性应用甲氨蝶呤(MTX)的临床价值.方法 收集102例有生育要求且输卵管未破裂的输卵管妊娠患者的病史资料.根据手术中是否局部应用小剂量MTX(20 mg)分为用药组(n=51)和对照组(n=51).分别就两组患者的一般资料数据、术后持续性异位妊娠(PEP)的发生率、术后3月随访子宫输卵管碘油造影术(HSG)的结果,进行比较分析;观察用药组的药物不良反应发生情况.结果 用药组术后1例发生PEP,对照组9例发生PEP,两组患者PEP发生率比较有显著性差异(2.0% vs 17.6%, P＜0.001).术后3月有共93例患者随访行HSG检查,用药组(n=48)与对照组(n=45)患者的术后输卵管通畅率无显著性差异(62.5% vs 71.1%,P＞0.05).用药组患者未见有明显的恶心、呕吐及口腔溃疡等不良反应,血象无明显变化.结论 输卵管妊娠腹腔镜保守性手术中局部预防性应用MTX可明显降低持PEP的发生率;药物使用不影响手术效果,且无明显不良反应.