Optimizing the embryo transfer technique

The technique of embryo transfer is very crucial and great attention and time should be given to this step. In order to optimize the embryo transfer technique, several precautions should be taken. The first and most important is to avoid the initiation of uterine contractility. This can be achieved by the use of soft catheters, gentle manipulation and by avoiding touching the fundus. Secondly, proper evaluation of the uterine cavity and utero-cervical angulation is very important, and can be achieved by performing dummy embryo transfer and by ultrasound evaluation of the utero-cervical angulation and uterine cavity length. Another important step is the removal of cervical mucus so that it does not stick to the catheter and inadvertently remove the embryo during catheter withdrawal. Finally, one has to be absolutely sure that the embryo transfer catheter has passed the internal cervical os and that the embryos are delivered gently inside the uterine cavity.     

间位结肠综合征的超声诊断及临床意义

目的 探讨间位结肠综合征的超声图像特征及诊断价值；方法 对1万余例需作上腹部检查的患常规进行肝与横膈间结构层次的超声波探测，并对其中21例在肝-横膈间发现有嵌顿结构图像的患进行X线腹部平片或CT检查；结果 21例患均于肝与横膈间测及片状等回声区或增强回声区，主要位于肝左内叶至右前叶前上方，并对肝表面产生弧形压迹，其中15例能清晰显示肠管结构及气体回声，经X线腹部平片或CT检查确诊；另6例显示均匀的等回声区，经大量饮水（600-800ml)后1-1.5h复查或隔日复查，腹部平片检查确诊；结论 间位结肠综合征具有典型的超声波声像图特征，超声检查能准确地作出诊断及鉴别诊断。     

Transvaginal sonography and rectal endoscopic sonography for the assessment of pelvic endometriosis: a preliminary comparison

BACKGROUND: Endometriosis and possible rectal involvement are difficult to assess by physical examination. Previous studies have shown the diagnostic value of magnetic resonance imaging and rectal endoscopic sonography (RES) in this setting, but not that of transvaginal sonography (TVS). The aims of this study were to compare the accuracy of TVS and RES for the diagnosis of pelvic endometriosis, and to compare the results with histological findings. PATIENTS AND METHODS: In a prospective study, 30 consecutive patients referred with clinical signs of endometriosis underwent TVS and RES; the images were interpreted blindly with regard to physical findings. RESULTS: Endometriosis was confirmed histologically in 28 (93%) of the 30 patients. Endometriomas were also present in 67% of cases. For the diagnosis of uterosacral endometriosis, the sensitivity, specificity, and positive and negative predictive values of TVS and RES were 75 and 75%, 83 and 67, 95 and 90%, and 45 and 40% respectively. For the diagnosis of rectosigmoid endometriosis, the sensitivity, specificity, and positive and negative predictive values of TVS and RES were 95 and 82%, 100 and 88%, 100 and 95%, and 89 and 64% respectively. CONCLUSION: Despite the large proportion of our patients who had intestinal endometriosis, representing a possible source of bias, our results suggest that TVS is as efficient as RES for detecting posterior pelvic endometriosis and should therefore be used as the first-line examination.     

基于多分辨率分析的心室晚电位神经网络检测

采用多分辨率分析和人工神经网络相结合的方法实现对心室晚电位的检测。首先利用多分辨率分解技术提取高分辨率心电信号不同频带的能量构成一组特征值 ,再利用这些特征值训练BP神经网络 ,并完成对心室晚电位的识别。经过对 2 8例 3导高分辨率心电图实验数据的处理 ,取得了较高的识别准确率     

三维超声测胎儿股容积估计胎重的价值

目的通过对57例妊娠分别使用二维、三维超声测量相关参数估计胎重，并作统计学比较，从而评价三维超声对于估测胎儿体重、诊断胎儿发育迟缓及巨大胎的优势和价值。方法对2005年10月至2006年3月间在我院分娩的57例妊娠，研究组用三维超声测胎儿股容积估计胎重，对照组用二维超声同步测量相关参数估计胎重。结果对两组估重结果与胎儿实际出生体重作相关统计学分析，研究组相关系数为0．983，对照组为0．906（P〈0．05），前者与实际体重关系更密切。结论三维超声测量胎儿股容积估测胎儿体重，较传统二维超声具有更大优势，对于发现胎儿发育迟缓（FGR）及巨大胎意义重大，有利于指导临床冶疗、选择分娩方式。     

视空间认知与脑血流速度的相关性研究

目的:探讨视觉空间认知活动对脑血流速度(CBFV)的影响及性别和任务完成质量对相对的CBFV变化的影响。方法:在完成视觉空间认知活动时及其先前的休息期,对45个正常的志愿者(右利手)用经颅超声多普勒(TCD)监测其双侧大脑中动脉血流速度的变化。结果:完成认知任务时与休息时期相比,所有认知任务的完成均诱导出双侧大脑中动脉血流速度的显著变化(P<0.001),这种变化显示出显著的右侧大脑半球偏侧化(P<0.01)。性别对认知活动所诱导的脑血流速度未产生显著的影响(P >0.05),任务表现质量(得分)对CBFV的变化不产生显著的影响。结论:视觉空间认知活动可诱导CBFV的右侧偏侧化。     

碘佛醇对兔VX2肾癌超声血流显像影响的研究

目的评价碘佛醇在兔VX2肾癌超声血流显像中的作用。方法24只实验兔建立肾VX2肿瘤模型，随机分3批，每批8只，分别于种植后第7、14、21天，静脉注射碘佛醇，观察注射前后肿瘤彩色血流信号的变化情况。结果注射碘佛醇后肿瘤内彩色血流信号较注射前增多、增强。其中第7天，肿瘤的CDFl分级变化无显著统计学意义，第14天和第21天差异有显著统计学意义。注射碘佛醇后连续观察20min，血流信号增强仍保持在高峰状态。结论碘佛醇对兔VX2肾癌的彩色多普勒血流显像起增强作用。     

Case report: a novel surgical approach to obstructed hemiuterus: sonographically guided hysteroscopic correction

Unilateral obstruction of a duplicate uterus is very rare. The current recommendation for its correction involves transmural incision of the uterine muscle. A method is presented here that was successfully applied in one patient suffering from this anomaly, using sonographically guided hysteroscopy. This method obviated the need for an extensive operation.     

超声内镜与胃镜检查对上消化道黏膜下肿瘤的诊断效果分析

目的探讨超声内镜与胃镜对上消化道黏膜下肿瘤的诊断效果。方法选择2015年3月至2018年2月确诊的60例上消化道黏膜下肿瘤患者,均行胃镜检查和超声内镜检查,分析其与病理检查的符合率以及超声内镜检查的回声特点,并记录超声内镜检查的敏感性和特异性。结果以病理检查结果为标准,超声内镜检查的符合率为90.00%,明显高于胃镜检查的73.33%(P <0.05)。超声内镜检查对黏膜肌层肿瘤诊断的敏感性为90.32%,特异性为93.55%;对黏膜下层肿瘤诊断的敏感性为93.33%,特异性为93.75%;对固有肌层肿瘤诊断的敏感性为85.71%,特异性为97.87%。结论与胃镜检查相比,超声内镜在上消化道黏膜下肿瘤中的诊断价值更高,能够对病变的性质、部位及来源作出准确的诊断。     

用彩色M型多普勒测量舒张早期右室内血流传播速度评价右室舒张功能

目的 :探讨右室舒张早期血流传播速度评价心脏右室舒张功能的价值。方法 :应用彩色M型多普勒测量 6 5例正常人 ,80例高血压 ,30例冠心病患者的右室内舒张早期血流传播速度。同时用脉冲多普勒测量了三尖瓣口的血流速度频谱。结果 :正常人右室内血流传播速度分别是 (4 0 .5± 8.8)cm/s(4 0～岁 ) ,(37.92± 5 .45 )cm/s(5 0～岁 ) ,(36 .4± 4.6 )cm/s(6 0～岁 )。高血压和冠心病右室内血流传播速度分别为 (2 4.9± 8.9)cm/s和 (2 4.5± 7.2 )cm/s,比正常人明显降低 (P <0 .0 0 1)。结论 :应用彩色M型多普勒测量的右室内血流传播速度能简便、准确地评价右室舒张功能