Objective To determine the affected factors of intraorbital hemodynamic results in diabetic retinopathy (DR) and the risk factors related to the occurrence of DR. Methods Posterior ciliary artery (PCA), central retinal artery (CRA), central retinal vein (CRV), and vortex vein (VV) of 68 patients with DR were measured by color Doppler flow image (CDFI). Thirty-one hemodynamic parameters, including systolic velocity, diastolic velocity, mean velocity, resistive index, pulsatility index and accelerative velocity of ophthalmic artery (OA), and other variates (blood pressure, blood sugar, gender, age, duration of the disease, and so on) were collected and clustered in a principal components analys is following a forward, stepwise logistic regression on these components. Results Nine principal components were extracted from 37 original variates, reflecting the velocity of OA, velocity of PCA, resistance of OA, velocity of CRA,resistance of CRA, resistance of PCA, time-related factor, venous drainage factor and gender factor, respectively. In the result of logistic regression, resistance of OA, velocity of CRA, resistance of PCA, time-related factor, and venous drainage factor were the risk factors related to DR. Conclusion The first risk factor affecting DR is time, and intraorbital hemodynamic abnormity influencing the development of diabetic retinopathy may be the increase of resistance of OA, decrease of velocity of CRA, decrease of resistance of PCA, and increase of venous drainage. (Chin J Ocul Fundus Dis，2004，20：98-100)
【摘要】 目的 探討彈性成像在甲狀腺微小癌診斷中的應用價值。 方法 回顧性分析從2007年12月-2008年4月間經病理證實的10例甲狀腺微小癌患者共11個病灶的超聲表現。 結果 彩色多普勒超聲診斷甲狀腺微小癌8例8個病灶，利用彈性成像技術診斷10例10灶。傳統彩色多普勒超聲對甲狀腺微小癌的診斷率為72.7%；利用彈性成像技術對甲狀腺微小癌的診斷率為90.9%。 結論 彈性成像技術對于甲狀腺微小癌是對彩色多普勒超聲檢查的有益的補充，能夠顯著提高超聲對甲狀腺微小癌診斷的準確性。【Abstract】 Objective To evaluate the application of US-elastography in diagnosis of thyroid microcacinoma. Methods The images of color ultrasound and ultrasound elastography from 11 lesions of 10 patients with thyroid micro-carcinoma diagnosed via histopathology between December 2007 and April 2008 were retrospectively analyzed. Results Eight patients with eight lesions were found by colour ultrasound and 10 patients with 10 lesions were observed by ultrasound elastography. The diagnosis accurate rate of ultrasonography was about 72.7% and of ultrasound elastography was about 90.0%. Conclusion US-Elastography is a beneficial addition in diagnosis of thyroid microcacinoma by colour ultrasound. It can remarkably develop the accurate rate of the diagnosis of the disease.
OBJECTIVE: To study the effect of color doppler flow imaging(CDFI) technique in the design of axial pattern flap. METHODS: From April 1996 to June 1999, 10 patients with residual wound were adopted in this study. Among them, there were seven males and three females, the area of wounds ranged from 6 cm x 8 cm to 15 cm x 20 cm. Before operation, the axial pattern flaps were designed by traditional method, then CDFI technique with high frequency(5.0-7.5 MHz) was used for examining the major supply artery of the flap. At last, the modified flaps were transferred to cover the wounds. RESULTS: All the patients except one case completed the operation successfully. The cosmetic and function of the flaps were excellent. CONCLUSION: CDFI is a simple, direct and accurate method for detecting the supply artery of axial pattern flap. This technique should be popularized to avoid the blindness of flap design.
【摘要】 目的 采用組織多普勒成像（TDI）檢測右室心尖部起搏（RVAP）、右室流出道起搏（RVOTP）對于左室同步性的影響與比較。 方法 2008年3月-2010年3月20例安置RVAP患者及20例安置RVOTP患者術后3個月行TDI檢測，將左室12節段收縮達峰時間的標準差（TS-SD）、6個基底段收縮達峰時間差值、左室12個節段中任意兩個節段收縮達峰時間最大差值作為同步化參數。 結果 TDI結果顯示，兩組之間同步性參數比較，有統計學意義（Plt;0.01）。 結論 RVAP會導致左室內收縮不同步，TDI技術可以準確評價左室收縮同步性。【Abstract】 Objective To explore the impact of right ventricular apex pacing (RVAP) and right ventricular outflow tract pace-making (RVOTP) on left ventricular systolic synchronization (LVSS) via tissue Doppler imaging (TDI). Methods A total of 20 patients with RVAP and 20 patients with RVOTP from March 2008 to March 2010 were collected. TDI detection was performed on all the patients three months after the operation. Synchronizing parameters included TS-SD of 12 regional contractions of left ventricle, 6 TS difference of basal segment, and maximum difference of TS in 12 regional contractions of left ventricle. Results The results of TDI showed significant difference in synchronizing parameters between RVAP and RVOTP (Plt;0.01). Conclusion RVAP may lead to un-synchronization of the left systole. TDI can evaluate LVSS accurately.
Objective To study the hemodynamic characteristics of concealed perforator flap in mini-pigs by ultrasonic Doppler technique. Methods Seven 7-month-old mini-pigs, weighing 20-25 kg, were included in the study. The saphenous artery perforator flap (group A, n=4), saphenous artery concealed perforator flap (group B, n=5), and saphenous artery concealed perforator flap combined with sarcolemma (group C, n=5) models were established randomly on both hind limbs of pigs. The pigs and flap survival conditions were observed after operation. The percentage of flap survival area was calculated by Photoshop CS5 software at 5 days after operation. Ultrasonic Doppler technique was performed on the flaps before operation and at immediate, 3 days, and 5 days after operation to record the hemodynamic changes of the flaps. The hemodynamic indicators of saphenous artery (inner diameter, peak systoli velocity, resistance index, and blood flow) and saphenous vein (inner diameter, maximum velocity, and blood flow) were recorded. Results At 1 day after operation, 1 pig died of infection, and the rest survived until the experiment was completed. Finally, the 3 flaps of group A, 4 of group B, and 5 of group C were included in the study. The flaps of the 3 groups all showed swelling after operation, which was most significant at 3 days. At 3 days after operation, the flaps in group B showed partial bruising and necrosis. At 5 days after operation, the flaps in groups A and C were basically alive, and the necrosis area of flap in group B increased further. The percentage of flap survival area in groups A, B, and C were 99.7%±0.5%, 74.8%±26.4%, and 100%, respectively. The percentage of flap was significantly lower in group B than in groups A and C (P<0.05). There was no significant difference between groups A and C (P>0.05). There were significant differences in the hemodynamic indicators of saphenous artery and vein between different time points in 3 groups (P<0.05). There was no significant difference in each indicator between groups at each time point (P>0.05). Conclusion Both the saphenous artery concealed perforator flap and the flap combined with sarcolemma have stable blood flow, but the survival area of the latter was better than the former.
ObjectiveTo explore the echocardiography characteristics of aortic valve disease (AVD) among different ethnic groups in Xinjiang.MethodsThe data of a large sample (n=130 358) of different ethnic groups in Xinjiang based on the results of echocardiography were analyzed between January 2011 and December 2016, and the echocardiography characteristics of AVD among the Han nationality and different ethnic minorities in Xinjiang were summarized.ResultsThe study recruited 130 358 patients, involving Han nationality (58.49%) and 33 ethnic minorities. The ethnic minorities included the Uygur (27.42%), Kazak (7.47%), Hui nationality (3.48%) and other minorities (3.13%). Apart from Uygur, Kazak and Hui nationality, no description was given due to the small sample sizes of other minorities (3.13%). In the total study population, the prevalence of aortic valve stenosis (AS) was 0.44%, and the prevalence of severe AS was 0.10%; the prevalence of aortic valve regurgitation (AR) was 0.37%, and the prevalence of severe AR was 0.02%; the prevalence of aortic valve calcification (AVC) was 6.51%, and the highest AVC prevalence existed in ≥75 years old age group (24.45%); the prevalence of bicuspid aortic valve (BAV) was 0.54%, and the highest BAV prevalence existed in 18-44 years old age group (0.86%). Among different ethnic groups, the Uygur had the highest prevalence in terms of AS (0.60%), AR (0.63%) and BAV (0.88%), while the Han had the lowest prevalence in terms of AS (0.37%) and AR (0.24%), but the highest AVC prevalence existed in the Han nationality (7.83%). The etiology of AVD showed that the degenerative valve changes was the main cause of AS with the largest proportion of 61.97%. While the aorta root diseases (35.97%) and BAV (22.87%) were the main etiology of AR.ConclusionsIn Xinjiang the overall prevalence of AVD is low. In the elderly population, the Uygur, Kazak and Hui nationality have the higher AS prevalence than the Han nationality does. Different ethnic groups have different AVD characteristics based on the echocardiography. In the Uygur group, AVD presents the younger age of onset; the prevalence of BAV is the highest in the Uygur population, while the lowest in the Hui nationality.
