多普勒组织成像技术在评价高血压左室舒张功能中的应用

目的 :应用多普勒组织成像 (DTI)技术检测二尖瓣环舒张期运动速度来评介原发性高血压左室舒张功能 ,探讨DTI的临床应用价值。方法 :2 0例原发性高血压和 2 0例年龄相似的健康者 ,应用DTI技术对二尖瓣环室间隔侧的运动速度进行测定 ,并与常规二尖瓣血流脉冲多普勒 (PW)检测结果对照分析。结果 :PW高血压组与对照组比较 ,峰值速度E、A及E/A明显低于对照组 ,差异显著 (P <0 0 1) ;DTI高血压组与对照组比较 ,峰值速度Ea、Aa及Ea/Aa明显低于对照组 ,差异非常显著 (P <0 0 0 1)。PW、DTI两组相同部位间比较 ,高血压组低于对照组。结论 :DTI技术评价高血压左室舒张功能比常规脉冲多普勒二尖瓣血流参数更敏感     

Non-invasive Assessment of Coronary Flow Velocity Reserve: A New Method Using Transthoracic Doppler Echocardiography

Coronary flow reserve (CFR) has been used toassess coronary microcirculation and epicardial coro-nary stenoses[1— 3 ] . CFR is defined as the ratio ofcoronary flow under maximal coronary vasodilatationto coronary flow under resting conditions[4 ] .Whenthe cross- sectional area of epicardial coronary arteriesis constant,coronary flow velocity (CFV) ratios areequal to volume flow ratios.The most common method used clinically formeasuring CFVR is intracoronary Doppler flow(ICD) analysis re…     

便携式多普勒血管探测仪在皮瓣移植中的应用

目的 :研究皮瓣移植前简单、可靠的血管探测的方法。方法 :在皮瓣移植前 ,以 HADECO ES-1 0 0 0 SPM多普勒血管探测仪对皮瓣血管蒂及皮动脉进行探测 ,与术中皮动脉探查结果进行比较 ,考察术前血管探测的准确性和意义。结果 :皮瓣血管蒂及皮动脉术前探测与术中探查结果完全一致。结论 :便携式血管多普勒仪是皮瓣移植前 ,简单、可靠的血管探测的仪器 ,根据探测结果进行皮瓣设计 ,有效地降低了手术失败的风险     

Image-directed color Doppler ultrasonography in the evaluation of superficial solid tumors

Image-directed color Doppler ultrasonography (ICDUS) studies of 86 patients with superficial solid masses yielded significantly lower resistive index (RI) values in acute inflammatory lesions, but no significant difference between the maximum systolic flow velocities (S) of the patient groups with malignant, benign, and acute inflammatory lesions. When analyzed separately, the malignant soft-tissue tumor subgroup was shown to have significantly higher mean RI compared to that of the malignant node subgroup. We conclude that RI may be useful in the differentiation of acute inflammatory masses from other pathological entities. Malignant soft-tissue tumors, especially sarcomas, may have different Doppler features from those of carcinomatous tumors. © 1995 John Wiley & Sons, Inc.     

计算机技术定量分析三尖瓣返流患者右室收缩和舒张功能的研究

本研究对３０例三尖瓣返流患者同步进行了多普勒超声心动图和右心导管检查，应用计算机软件程序对三尖瓣返流频谱曲线进行微分处理。结果表明，两种技术测量的右室压力最大上升速率、右室心肌最大生理缩短速度、右室压力最大下降速率以及右室心肌松驰时间常数均高度相关（ｒ分别为０．９３，０．８６，０．９４，０．９５），表明三尖瓣返流压差法能够无创性估测右室收缩和舒张功能，应用计算机软件程序能够使测量方法简便、准确。     

猕猴对不同极化方向微波辐射能量吸收的研究

为提供微波辐射安全标准必要的数据，研究了不同极化方向微波辐射能量对猕猴的影响。实验在医学微波无反射室中进行，分为电场，磁场和微波传输方向极化组，辐射频率１ＧＨｚ，用红外热图技术，对暴露在三种极化方向电磁场中猕猴面部各解剖特片部位及胸部在辐射前后进行温度变化的定量分析。     

Cor triatriatum associated with partial anomalous pulmonary venous connection to the coronary sinus: Echocardiographic and angiocardiographic features

Summary An infant girl is described who had cor triatriatum and partial anomalous pulmonary venous connection of the left pulmonary veins to the coronary sinus, the first report of this combination of lesions. The infant also had a Dandy-Walker malformation and multiple facial and intrathoracic hemangiomas. The cardiac diagnosis was made by two-dimensional echocardiography. Cardiac catheterization and angiography confirmed the findings and also demonstrated a persistent left superior vena cava draining to the coronary sinus. The infant underwent successful surgical repair. Partial anomalous pulmonary venous connection and left superior vena cava not infrequently are associated with cor triatriatum. Although two-dimensional echocardiography is sensitive for the detection of cor triatriatum, preoperative cardiac catheterization is necessary to identify unequivocally systemic and pulmonary venous connections.     

彩超对肾移植术后并发肝脏恶性肿瘤的监测

目的　探讨彩超在肾移植术后并发肝脏恶性肿瘤监测中的应用价值。　方法　应用 Acuson12 8XP彩色多普勒超声诊断仪 ,对在我院行异体肾移植手术的终末期尿毒症患者 12 0 0例进行规律随访。　结果　发现 17例恶性肿瘤 ,其中肝癌 7例 ,占 4 1.17%。 5例肿块单发 ,2例多发 ;肿块最大 10 cm× 10 cm,最小 2 .3cm× 2 .1cm。其中 6例手术病理证实 ,1例肝活检证实。　结论　对移植肾术后患者 ,首选彩超随访肝脏变化 ,能早期发现肿瘤 ,为临床选择治疗方案提供时机 ,并提高换肾后发生恶性肿瘤患者的存活率     

Smoking and hypertension: risk factors for carotid stenosis

Summary The prevalence of smoking, hypertension and diabetes mellitus was assessed in 221 patients suffering from internal carotid stenosis and compared with the prevalences in two sex- and age-matched control groups composed of subjects having normal Doppler findings and from non-neurological outpatients. Of the subjects with carotid stenosis 27.6% were hypertensive smokers in comparison with 9.5% and 17.2% in the two control groups. The difference of the stenosis cohort from the two control groups was significant (P<0.01 and P=0.016 respectively). There was no statistically significant differences between the occurrence of diabetes and hypertension in non-smokers and patients who smoked. In 394 investigated patients suffering from carotid stenosis or occlusion an obstruction index, based on the Doppler shift frequency, was calculated. This index was lowest in the normotentive non-smokers. It was only insignificantly higher in the hypertensive non-smokers but significantly so in the normotensive smokers. The index was highest in the hypertensive non-smokers. It was concluded that cigarette smoking, especially if associated with hypertension, is a determinant risk factor for carotid stenosis and occlusion.     

单能量X线测定骨密度的初步分析

目的：了解温州地区人群不同年龄组骨质疏松患病率及同年龄组男女骨质疏松患病的差异，强调早期预防治疗老年人及绝经期妇女骨质疏松的重要性，方法：应用单能量X线（SXA）骨密度仪测量246例正常人的右跟骨骨密度，结果：男性大于60岁组较小于60岁组骨密度（BMD）降低明显（P＜0．05）；女性50岁以上组与小于50岁组相比，BMD下降差异有极显性（P＜0．01）；各年龄组男女相比，男性BMD明显高于女性（P＜0．05）。结论：女性骨质疏松症的发病大多以绝经后为主，雌激素在维持骨量方面具有重要的作用。SXA检测的跟骨含95％小梁骨，能较好地确定骨质疏松的风险水平，且其具有价廉、简便，快捷，较准确等特点，故不失为一种较好的临床筛查手段。