高频彩超对颈部淋巴结囊性病变的诊断价值

①目的探讨高频彩超对颈部淋巴结囊性病变的诊断价值。②方法回顾性分析25例颈部淋巴结囊性病变的高频彩超表现。③结果颈部淋巴结囊性病变见于颈淋巴结囊性转移瘤、化脓性淋巴结炎及淋巴结结核。其中13例为颈部淋巴结囊性转移瘤，其特征性超声表现为颈部淋巴结囊性肿大，伴囊壁实性结节；较大囊壁结节内常可探及动脉血流信号，部分囊壁结节可见微钙化。7例为颈部急性化脓性淋巴结炎，其主要超声表现为上颈部淋巴结呈单发、圆形囊性肿大；囊壁略厚，且较均匀；囊液呈细密点状回声。5例为颈部淋巴结干酪脓肿型结核，其主要超声表现为单侧或双侧中下颈部淋巴结呈多发、椭圆形囊性肿大，部分可融合成团；内壁毛糙，囊液内散在分布点状高回声。④结论高频彩超检查对颈部淋巴结囊性病变的诊断和鉴别诊断具有重要价值。     

彩色多普勒超声图指导风湿性心脏病二尖瓣狭窄球囊扩张术91例

目的：应用彩色多普勒超声心动图指导经皮二尖瓣球囊成形术(PBMV)治疗风湿性二尖瓣狭窄的价值、方法：运用彩超对行PBMV的患进行术前术后检查，观察二尖瓣钙化程度及部位、开口形状、瓣口面积、二尖瓣返流(MR)程度、瓣下病变、左房左室大小、左房有无血栓．结果：91例PBMV术后患中，术后MR72例，其中MR新出现19例，MR加重8例、与术前对比，术后二尖瓣开放幅度、二尖瓣口面积、二尖瓣跨瓣压、二尖瓣压差半降时间较术前有明显改善趋势，左房内径、肺动脉内径较术前有缩小趋势．同时，术后左房压、右室压及肺动脉压也有下降趋势。结论：彩超能明确PBMV治疗二尖瓣狭窄的效果。影响：PBMV效果的因素较多，但二尖瓣钙化的程度、部位和瓣膜形态较为重要。     

经直肠彩色多普勒诊断良性前列腺增生37例

目的：探讨经直肠彩色多普勒超声对良性前列腺增生的诊断价值。方法：采用经直肠彩色多普勒对37例良性前列腺增生患者进行检查，测量大小，计算体积，并按前列腺重量分成四组，测定、分析增生内腺动脉的血液动力学参数。分组评价增生内腺的彩色血流图。结果：随前列腺重量的增加，增生内腺血流分布逐渐增加，血流的最大流度(Vmax)、血流最低流速(Vmin)、血流阻力指数(RI)、搏动指数(PI)逐渐增加。结论：经直肠彩色多普勒检查有助于临床对前列腺增生的准确诊断。     

中国政治文明建设的价值选择

中国社会主义政治文明建设是既要置于人类政治文明的背景之中 ,又要具有中国特色。政治文明建设价值选择是对政治文明发展趋向的整体确认 ,必须从政治理念、政治制度、政治行为、政治关系层面来把握。人类政治文明同质价值选择主要体现在权力制约、人民主权、治理方式 ;中国政治文明特质价值即社会主义定向和中国国情 ,这种价值选择体现在制度形态、治理形态、文化形态之中。     

健康成人135例心率变异性时域分析

目的：探讨国人心率变异时域分析各项指标的正常值。方法：应用清华－西安兰港监测系统对１３５例１８～７９岁健康成人连续２４ｈ动态心电图监测。结果：①心率变异性时域：ＳＤＮＮ、ＳＤＳＤ、ＳＤＡＮＮ、ＲＭＳＳＤ、ＰＮＮ５０分别为１２９．５２±２７．２５ｍｓ；２１．１８±８．２０ｍｓ；１１４．７８±２６．８４ｍｓ；３１．３６±１２．６７ｍｓ；８．５０ ± ７．８０ｍｓ，所测得正常值范围与国内外研究结果相似。②１８～３５岁组、３６～５９岁组，均与≥６０岁组有非常显著的差异（Ｐ＜０．０１，或Ｐ＜０．０５）。③各年龄组男女间ＳＤＮＮ、ＳＤＳＤ、ＰＮＮ５０无显著差异（Ｐ＞０．０５），但ＳＤＡＮＮ男性较女性大（Ｐ＜０．０５）；女性ＲＭＳＳＤ较男性大（Ｐ＜０．０５）。结论：ＳＤＮＮ＞１００ｍｓ；ＳＤＳＤ＞１２ｍｓ；ＳＤＡＮＮ＞８７ｍｓ；ＲＭＳＳＤ＞１８ｍｓ；ＰＮＮ５０＞０．７％可作为ＨＲＶ时域分析参考正常值。     

行列资料诊断试验预告值和准确度的一次性标化研究

本文建立了行列资料诊断试验预告值和准确度的一次性标化方法，省去了标化过程理论样本Ｎｔ的设定和求有关理论值的计算过程，导出行列资料中标准化Ⅰ级阳性预告值和标准化Ⅱ级阳性预告值、标准化Ⅰ级阴性预告值和标准化Ⅱ级阴性预告值、标准化可疑预告值和标准化准确度的一次性标化公式。分析了标化与非标化预告值的关系及转化规律。     

50岁以上正常人左室舒张期彩色多普勒血流频谱参数变化的研究

目的探讨５０岁以上正常人左室舒张期脉冲多普勒频谱的参数变化情况。方法选择一年半时间内受检的所有５０岁以上正常人４７５例，按每１０岁为一组分４组进行分析。受检者取左侧卧位，常规显示心尖四腔心切面，取样容积置于二尖瓣尖，使声束与二尖瓣血流方向夹角＜１５°，以连续三个心动周期的平均值分别测量Ｅ峰、Ａ峰、Ｅ／Ａ及Ｅ峰减速时间并统计。结果发现Ｅ峰高于正常值低限的例数、平均Ｅ峰血流速度以及Ｅ／Ａ均随着年龄的增加而下降，Ｅ峰减速时间则随着增龄而增加。结论左室舒张期血流频谱的所有参数与年龄有显著的相关性，明显随着增龄而变化，并且有其规律性。     

Incidence of the retroaortic left renal vein in patients with varicocele.

OBJECTIVE: The purpose of this study was to investigate the incidence of the retroaortic left renal vein (RLRV) in patients with varicocele. METHODS: The left renal vein was ultrasonographically investigated for the presence of the RLRV in 140 patients with varicocele and a control group of 137 age-matched patients. The main diagnostic criteria for varicocele were the presence of a varicose vein with a diameter of 3 mm or larger at rest and with a reflux lasting more than 2 seconds during the Valsalva maneuver. The RLRV was defined as a posterior course of the left renal vein to the aorta at the level of the origin of the superior mesenteric artery. RESULTS: The RLRV was observed in 13 (9.3%) of the 140 patients with varicocele and 3 (2.2%) of the control patients. The incidence of the RLRV was found to be significantly higher in patients with varicocele compared with the control patients (P = .018, Fisher exact test). In 13 patients with the RLRV, left varicocele and bilateral varicocele were detected in 10 and 3 cases, respectively. CONCLUSIONS: In this study, the incidence of the RLRV was found to be significantly higher in patients with varicocele compared with control patients. Thus, we suggest that the presence of the RLRV may be considered one of the etiologic factors in the development of varicocele.     

Single 5'green-3'red Hybrid Gene in Protanopia

Purpose: To disclose the structure of visual pigment gene for a protanopia with specific variation.Methods: Exon 5 fragments of the red andgreen visual pigment genes from the protanopia with specific varnation as well as controls were amplified by poly-merase chain reaction (PCR). The PCR products were put through heteroduplex-SSCP analysis and PCR-RFLP (restriction fragement length polymorphism) analysis to clarify the specific variation. The specific variation of the exon 5 DNA fragment from the protanopia was identified by sequencing.Results: A novel 5'green-3'red hybrid gene fragment without the normal red and green visual pigment gene was discovered in the protanopia. He should only have a single visual pigment gene, 5'green-3'red hybrid gene, on his X chromosome. The fusion point is between codon 285 and codon 296 in exon 5. Conclusion : Unequal intragenic recombination may occur in exon 5 as well as its upstream. A 5'green-3'red hybrid gene may present independently on the X chromosome without ac     

彩色多普勒超声对感染性休克患者急性肾损伤的预测价值

背景 感染性休克患者存在肾脏血液灌注异常,严重时可诱发急性肾损伤(AKI),严重威胁患者生命安全;彩色多普勒超声(CDU)可用于评估肾脏血流变化,但有关其在感染性休克患者AKI评估中价值的研究较少。目的 通过CDU评价感染性休克患者AKI的发生情况及其血流动力学改变。方法 选取2019年6月至2021年7月徐州市中心医院收治的105例确诊为感染性休克的患者并纳入感染组,选取同期健康体检者58例并纳入对照组,收集受试者一般资料。采用CDU检查受试者肾脏血流动力学指标[肾动脉管腔内径(D)、收缩期血流峰值速度(Vs)、舒张末期血流速度(Vd)、阻力指数(RI)、搏动指数(PI)],比较感染组与对照组的一般资料及肾脏血流动力学指标。根据感染组患者入院72 h内发生AKI与否将其分为AKI组及非AKI组,比较AKI组与非AKI组肾脏血流动力学指标。应用受试者工作特征(ROC)曲线分析肾脏血流动力学指标对感染性休克患者发生AKI的预测价值。应用单因素分析及多因素Logistic回归分析探讨感染性休克患者发生AKI的影响因素。以AKI由轻到重的程度将患者分为AKIⅠ组、AKIⅡ组、AKIⅢ组,比较...