外伤性牙槽损伤固定方法的临床研究

目的　分析方丝弓托槽技术和牙弓夹板技术在外伤性牙槽损伤的临床应用。　方法　随机将 91例外伤性牙槽损伤需进行单颌固定的患者分为两组 ,共 134颗牙齿 ,分别采用方丝弓托槽技术和常规牙弓夹板技术固定 ,记录患者复诊过程中固定装置的稳固情况 ,以及半年后临床疗效和牙周相关指标 ,并进行统计学处理。　结果　两组患者复诊过程中固定装置稳固情况和在牙龈炎、牙周袋形成、牙槽骨吸收的改变上差异有非常显著性意义 (P <0 .0 1) ,在临床疗效评定结果上差异无显著性意义 (P >0 .0 5 )。　结论　方丝弓托槽技术是治疗外伤性牙槽损伤可靠的单颌固定方法     

非痉挛型脑瘫的立体定向手术治疗(附16例报告)

目的探讨立体定向核团毁损术及脑深部电刺激术治疗非痉挛型脑瘫的疗效。方法将16例非痉挛型脑瘫病人分成三组：A组为肌张力障碍型，11例；B组为肌张力障碍合并震颤型，3例；C组为共济失调合并震颤型，2例。采用通用DT评分量表（GPS）评估病肢功能。分别采用立体定向核团毁损术及脑深部电刺激术治疗。术后随访1年，评估症状改善情况。结果A组肌张力障碍改善率为0—58．3％，平均17．1％；B组肌张力障碍改善率6．7％～25．0％，震颤改善率66．7％～75．0％；C组共济失调无明显变化，震颤改善率12．5％～25.0％。结论立体定向手术是治疗肌张力障碍型及震颤型脑瘫的可选择手段。     

Diagnostic imaging of orofacial malformations

Summary Two-dimensional conventional X-rays and computer tomographic imaging systems contribute to the diagnosis and surgical planning of patients with orofacial malformations. The ability to reformat CT scans into three-dimensional osseous and soft tissue surface images has a significant impact on the diagnosis and management of orofacial malformations. Cephalometric evaluation with teleradiography provides precise insight into both the skeletal structures and the soft parts, enabling the radiologist to assess the relationship among the different parts in a given subject, at any given time and in relation to the normal.      

酶活性法测定GAD抗体及其初步临床应用

目的建立测定谷氨酸脱羧酶（ＧＡＤ）抗体的方法，以探讨该抗体对胰岛素依赖型糖尿病（ＩＤＤＭ）的预测、早期诊断及其发病机制研究的意义。方法用专用酶反应试管建立放射性同位素底物测定ＧＡＤ活性的分析方法。结果底物浓度为４ｍｍｏｌ／ｍｌ（３７ｋＢｑ）时，酶活性测定在一定浓度范围内剂量效应呈直线关系（ｒ＝０９８９）。结合免疫沉淀与酶活性分析，建立了免疫沉淀酶活性分析测定ＧＡＤ抗体的方法，２份ＩＤＤＭ患者ＧＡＤ抗体阳性血清与酶活性免疫沉淀指数存在剂量效应关系。用免疫沉淀酶法测定１５例正常人及２０例病程１年以内的ＩＤＤＭ患者血清，两组酶活性免疫沉淀指数分别为０１９３±００８７和０３８１±０１２１，差异有显著性（Ｐ＜００１）。按照超过正常人组免疫沉淀指数ｘ＋２ｓ为阳性区分，２０例ＩＤＤＭ患者血清中ＧＡＤ抗体阳性９例，占４５％。结论该方法简单，能直接反映酶活性的改变，无需高纯度的ＧＡＤ，特别适用于刚开始从事ＧＡＤ抗体研究的实验室及阳性血清筛查。     

胚胎种植前遗传学检测助孕妊娠结局的影响因素研究

背景 育龄期女性胚胎着床失败及流产的最常见原因是胚胎异常,但移植经胚胎种植前遗传学检测(PGT)筛选后的正常胚胎后,仍出现种植失败或流产的原因目前并没有形成统一的结论。目的 分析PGT助孕后种植失败及流产的影响因素。方法 回顾性分析2018年12月至2021年2月在安徽医科大学第一附属医院生殖中心行PGT助孕的329例患者的临床资料,根据患者是否临床妊娠分为临床妊娠组(n=218)和种植失败组(n=111),并将临床妊娠组患者根据妊娠结局分为活产亚组(n=175)和流产亚组(n=43)。比较临床妊娠组和种植失败组,活产亚组和流产亚组的一般情况、促排卵及体外胚胎发育情况。采用多因素Logistic回归分析探讨PGT患者种植失败及流产的影响因素。绘制受试者工作特征(ROC)曲线分析多因素Logistic回归分析筛选出的影响因素对PGT患者发生种植失败及流产的预测价值。结果 多因素Logistic回归分析显示,既往流产次数≥2次〔OR=4.032 0,95%CI(2.423 0,6.710 0)〕、高密度脂蛋白胆固醇(HDL-C)水平低〔OR=3.890 0,95%CI(1.455 0,10...     

Effects of epidural bupivacaine and epidural morphine on bowel function and pain after hysterectomy

A comparison was made of the effects of continuous epidural analgesia with bupivacaine and intermittent epidural morphine on bowel function after abdominal hysterectomy. The duration of postoperative ileus was assessed as the time from the end of operation to the first postoperative passage of flatus and feces. Twenty-two patients were randomly allocated to two equal groups. An "epidural morphine" group received general anesthesia and epidural morphine for postoperative pain relief, and an "epidural bupivacaine" group was given combined general anesthesia and epidural anesthesia with 0.5% bupivacaine intraoperatively and epidural analgesia with 0.25% bupivacaine postoperatively. Epidural morphine or bupivacaine was given for 42 h postoperatively. Pain intensity (visual analog scale) was low in both groups, but lower (P less than 0.05) in the epidural bupivacaine group. The time to first passage of flatus was 22 +/- 16 h in the epidural bupivacaine group and 56 +/- 22 h in the epidural morphine group (P less than 0.001). The time to first postoperative passage of feces was shorter (P less than 0.05) in the former than in the latter 57 +/- 44 h vs 92 +/- 22 h). The patients of the epidural bupivacaine group started intake of oral fluids earlier (P less than 0.01) and to a greater extent (P less than 0.05) than those in the epidural morphine group. It is concluded that the duration of postoperative ileus after hysterectomy is shorter when epidural bupivacaine is given for postoperative pain relief than when this is achieved by epidural morphine.     

Human smooth pursuit during transient perturbations of predictable and unpredictable target movement

Summary The predictive component of human smooth pursuit was studied by perturbing sinusoidal target motion at unpredictable instants. The disturbances consisted of either a brief period of stabilization of the target on the fovea or a replacement of the sine by a ramp displacement for half a period. To minimize the effects of a possible change of the tracking strategy by the subject the transitions were masked and only the initial part of the response to the disturbance was analyzed. After stabilization on the fovea the eye oscillation continued at the frequency of the preceding target movement for about one half-cycle, whereupon the oscillation was rapidly damped. The mean unidirectional smooth eye acceleration was 70% of the mean unidirectional target acceleration prior to the stabilization. This suggests that during pursuit of a sinusoidal target movement about 75% of the oculomotor response is generated by predictive processes. When the sine was replaced by a ramp, starting at the velocity zero-crossing, the eye accelerated away from the target for ca. 180 ms irrespective of the frequency of prior tracking. In contrast, when the ramp started at the peak velocity of the sinusoidal target motion the eye accelerated away from the target for more than a quarter period. After foveal stabilization during pursuit of a pseudorandom stimulus, the eye continued to oscillate for less than one period at approximately the highest frequency present in the stimulus. The frequency characteristics of human smooth pursuit of predictable as well as unpredictable target motion were correctly simulated by a model, which derived its predictive properties from a lead element, tuned to the current frequency of the target motion.     

体外不同比例再生肝细胞与结肠癌细胞的共培养

Objective To investigate the proliferation potential of colon cancer cells co-cultured with different proportions regenerating hepatocytes and role of the cell growth factors related to liver regeneration in vitro.Methods Active regenerating hepatocytes were obtained by collagenase perfusion in situ of rats models underwent 70% liver resection after 24 hours.Co-cultures with different proportions of hepatocytes to human colon cell line SW480 were performed respectively.The proportion of hepatocytes to human colon cell line SW480 Was 10:1 in group A,1:1 in group B.There was only human colon cell line SW480 in group C(control group).Proliferation capacity was assessed with the percentage by 3H-thy incorporation.Concentration of epidermal growth factor(EGF),insulin-like growth factor-1(IGF-1)and hepatocyte growth factor(HGF)was analyzed by ELISA.Results There was no significant difference among the 3 groups in 3H-thy incorporation percentage,and concentration of EGF,IGF-land HGF after 24 hours' culture(P>0.05).3H-thy incorporation percentage(15.9±1.4,13.2±1.5),and concerntration of EGF [(722.9±55.4)ng/L,(498.2+41.5)ng/L]and IGF-1[(755.2±35.7)ng/L,(538.1±37.5)ng/L]in Group A and B were higher than that in group C after 72 hours(P<0.05).Especially the indexes above in group A were higher than that in group B(P<0.05).there was no significant difference in concerntration of HGF among the 3 groups after 72 hours(P>O.05).Conclusions These results imply that the regenerating hepatocytes contribute to the hyperproliferative state of co-culturing colon cancer cells.The mechanism maybe have relationship with EGF and IGF-1 high expression in colon cancer cells caused by growth signals coming from hepatocytes.