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Variations in the bifurcation level of the abdominal aorta, formation level of the inferior vena cava, and insertion level of the left renal vein into the inferior vena cava and their clinical importance in laparoscopic surgery

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Laparoscopic, Endoscopic and Robotic Surgery 2022年第2期5卷 66-70页

作者： Mustafa Khader Tala Ghassan Al-Hyasat Ikram Yousef Salameh Amjad T.Shatarat Faculty of Medicine University of JordanAmmanJordan Department of Radiology Jordan University HospitalAmmanJordan Department of General Surgery Jordan University HospitalAmmanJordan Department of Anatomy and Histology Medical SchoolUniversity of JordanAmmanJordan

Objective: It is important to minimize the risk of major vascular injury during pneumoperitoneumestablishment in laparoscopic surgeries for patients with unusual variations in the levels of theabdominal aorta, the inferior vena cava (IVC), and the left renal vein, which will decrease the morbidityand mortality. The study aims to assess the variations regarding the bifurcation level of the abdominalaorta, formation level of the IVC, and insertion level of the left renal vein into the ***: This retrospective study was conducted on 100 patients (50 males and 50 females) referred tothe Department of Radiology, Jordan University Hospital for abdomino-pelvic CT with intra-venouscontrast from January 2018 to December 2019. The three vessels were determined on the axial plane,the coronal plane, and the midsagittal plane. The central vertebral body height as well as the distance ofthe level of the point of interest to the upper end plate of the vertebrae were measured. Afterwards, theresults were classified into the following categories, upper end plate, lower end plate, intervertebral disc,upper half, and lower half of the ***: The aortic bifurcation was mainly found at the level of the L4 vertebral body (65, 65%). In theremaining cases, the bifurcation was found to be variably located spanning from L3 in 11 (11%) cases to3 (3%) cases at L5. As for the iliocaval junction, the most common site was also at the level of L4 with41 (41%) cases followed by 39 (39%) cases at the level of L5, and 20 (20%) cases at the intervertebral discof L4/L5. The left renal vein most commonly joined the IVC at the level of L1 with 62 (62%) cases followedby 20 (20%) cases at the intervertebral disc T12/L1. There was wide variation in its entry to the IVCspanning from 4 (4%) cases at T12/L1 to 1 (1%) case at ***: The anatomical variation of the major vessels can be found in the normal ***, sufficient investigation of the anatomical position of these

关键词： abdominal aorta Inferior vena cava Left renal vein Anatomic variation Laparoscopy

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Detection of atherosclerotic plaque progression in the abdominal aorta of rabbits with 3T magnetic resonance imaging

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Chinese Medical Journal 2012年第15期125卷 2714-2718页

作者： MA Xiao-hai ZHAO Lei ZHAO Quan-ming FENG Ting-ting SHANG Jian-feng ZHANG Zhao-qi Department of Radiology Beijing Anzhen Hospital Capital Medical University Beijing 100029 China Department of Cardiology Beijing Anzhen Hospital Capital Medical University Beijing 100029 China Department of Pathology Beijing Anzhen Hospital Capital Medical University Beijing 100029 China

Background With features of high tissue contrast, MRI can be used for the qualitative and quantitative evaluation of atherosclerosis plaques. In this study we investigated the development of atherosclerosis plaque with high resolution 3T MRI in a rabbit model and compared the findings with the histopathological results. Method Twenty male New Zealand white rabbits were randomly allocated into an experimental group （n=16） and a control group （n=4）. Atherosclerotic lesions were induced in the abdominal aorta by balloon injury and cholesterol feeding. Multiple sequences MRI examination （ToF, TIWI, T2WI, and CE T1WI） were performed at the 2nd, 3rd, and 4th months after aortic denudation. Vessel wall thickness, total vessel area, lumen area, and vessel wall area were recorded. Plaque components were analyzed using histological results as a standard reference. Results Seventeen rabbits （14 in the experimental group and 3 in the control group） received all three MR examinations. Gradually, from 2 months to 4 months, vessel wall thickness and area in the experimental group increased significantly compared with the control group （P 〈0.01）. In the lumen area progressive stenosis was not found, even a slight dilation had developed in the experimental group. Lipid, fibrotic and calcified plaques can be differentiated by MR image. According to histological results, MRI had good performance in detection of lipid plaque. Conclusion MRI can be used to monitor progression of atherosclerosis and differentiate plaque components.

关键词： magnetic resonance imaging, atherosclerosis progression abdominal aorta

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An Experimental Set-Up for the in Vitro Simulation of a Physiological Pulsatile Flow in the abdominal aorta

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Journal of Flow Control, Measurement & Visualization 2022年第4期10卷 148-160页

作者： Tiandong Lu Jiemin Zhan Wei Su Wenqing Hu Department of Applied Mechanics and Engineering School of Aeronautics and Astronautics Sun Yat-sen University Guangzhou China

In vitro experimental set-up is an important tool for investigating abdominal aortic aneurysm (AAA). Accurate reproduction of the physiological pulsatile flow waveform in the abdominal aorta at various anatomic locations is an important component of these experimental methods. The objective of this study is to establish an experimental set-up to generate a physiological pulsatile flow for in vitro simulations of the abdominal aorta. The physiological flow was established by a computer-controlled peristaltic pump and the flow field in a circular straight pipe is measured under pulsatile flow conditions by a 2-dimensional particle image velocimetry system (2D-PIV). Experimental results show that the in vitro experimental set-up provides a flow with a period of 2 s, a reasonable cross-sectional velocity distribution and an approximate inlet velocity profile that is close to the human abdominal aorta.

关键词： 2-Dimensional Particle Image Velocimetry System abdominal aorta Blood-Flow Experimental Set-Up Flow Field

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Comparison of invasive dynamic blood pressure between superior mesenteric artery and common carotid artery in rats

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World Journal of Emergency Medicine 2020年第2期11卷 102-108页

作者： Rui-ning Liu Xiao-jun Wei Shao-ping Li Cheng Jiang Yan Zhao Emergency Department of Zhongnan Hospital Wuhan UniversityWuhan 430071China

BACKGROUND: The purpose of this study was to identify the consistency of invasive dynamic blood pressure(BP) monitoring between the superior mesenteric artery(SMA) and the common carotid artery(CCA).METHODS: Eight male Sprague-Dawley rats were cannulated in SMA and CCA simultaneously for BP monitoring, *** abdominal aorta was prepared for the induction of BP change through clamping/de-clamping by a microvascular *** dynamic BP monitoring was performed by a polygraph *** blood pressure(SBP), diastolic blood pressure(DBP), and mean arterial pressure(MAP) values would be recorded during different time periods: the baseline(T1), the increasing period after clamping(T2), the platform period during clamping(T3), the decreasing period after de-clamping(T4), and the final platform period(T5).Three trials were performed on each rat with 15-minute intervals between consecutive ***: Systolic BP showed no significant differences between SMA and ***, significant difference was found in diastolic blood pressure except at T5(P=0.534).Mean arterial pressure of two arteries were significantly different only at T1(P=0.015).The strength of association was significantly high between BP measurements through SMA and CCA(Pabdominal aorta occlusion and release, especially in cerebrovascular-related research.

关键词： Blood pressure Superior mesenteric artery Common carotid artery abdominal aorta

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Multiple recurrent cystic echinococcosis with abdominal aortic involvement: A case report

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World Journal of Clinical Cases 2020年第14期8卷 3108-3113页

作者： Nijiati Taxifulati Xue-An Yang Xin-Feng Zhang Abudusalamu Aini Abuduaini Abulizi Xin Ma Adilai Abulati Fei Wang Ke Xu Tuerganaili Aji Ying-Mei Shao Ayifuhan Ahan Department of Hepatobiliary and Hydatid Disease Digestive and Vascular CenterFirst Affiliated Hospital of Xinjiang Medical UniversityUrumqi 830054Xinjiang Uygur Autonomous RegionChina Department of Pain Management People’s Hospital of Xinjiang Uyghur Autonomous RegionUrumqi 830001Xinjiang Uygur Autonomous RegionChina

BACKGROUND Recurrent cystic echinococcosis(CE)with vital organ involvement is a challenge for ***,we report a case of aortic involvement in recurrent retroperitoneal CE lesions following primary splenic CE *** SUMMARY A 60-year-old male was admitted due to progressive abdominal pain and poor *** was diagnosed with multiple recurrent CE with abdominal aortic involvement according to preoperative *** surgical resection,major aortic bleeding accidentally occurred while dissecting the cyst,which was firmly attached to the abdominal aortic *** attempts were conducted to deal with this emergency situation and maintain *** recovery was uneventful,and 2-year follow-up showed no sign of recurrence or any other *** Radical resection of recurrent complicated CE with aortic involvement should be carefully planned and performed to prevent possible severe adverse complications,thereby improving the postoperative outcome.

关键词： Cystic echinococcosis abdominal aorta Covered vascular stent Patient safety Hydatid disease Case report

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Expression of anti-apoptotic protein Bcl-2 and proapoptotic protein Bax after delayed paraplegia induced by ischemia/reperfusion injury

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Neural Regeneration Research 2006年第6期1卷 497-501页

作者： Bibo Liu Miao Liu Duoning Wang Wei Ma Shengli Dang Department of Orthopaedics First Affiliated Hospital of Medical School Xi＇an Jiao Tong University Xi＇an 710061 Shaanxi Province China

BACKGROUND： Operation of spine does not involve in spinal cord; however, spinal cord injury occurs at post-operation induced by unclear factors. Meanwhile, after decompression of lumbar spinal canal, symptoms are severer and severer. In addition, during extirpation of cervical and lumbar intervertabral disc, spinal cord and its vessels are not damaged, but spinal cord injury is also suffered from patients with partial improvement. All statuses mentioned above are related to expressed changes of bc1-2 gene inhibiting apoptosis and bax gene accelerating apoptosis. BJECTIVE： To observe motor function of hindlimbs of ischemia/reperfusion model in rabbits at various time points after reperfusion and expressions of apoptosis correlated protein Bcl-2 and Bax. DESIGN： Completely randomized grouping design and contrast study SETTING： Department of Orthopedics, the First Affiliated Hospital of Medical School, Xi＇an Jiao Tong University MATERIALS ： Forty-eight New Zealand white rabbits of both genders were randomly divided into sham operation group （n =24） and model group （n =24）, and then, rabbits in each group were observed at four time points： 8, 24, 72 and 168 hours after reperfusion, with 6 in each time point. Rabbit-anti-rabbit Bcl-2 antibody and rabbit-anti-rabbit Bax antibody were provided by Boster Company. The procedures were accordant to the kit introduction. METHODS ： The experiment was carded out at Laboratory of Orthopaedics of First Affiliated Hospital of Medical School, Xi＇an Jiao Tong University from April to August 2005. （1） Delayed paralysis models of spinal cord after ischemia/reperfusion were established based on method of Zivin et al. Animals in sham operation group underwent an exposure of abdominal aorta but the aorta was not occluded. （2） Motor function of hindlimb was observed 8, 24, 72 and 168 hours after reperfusion. A grade of 0-5 was assigned to each animal （grade 0： no voluntary hind limb function; grade 5： normal hop; grades 0-3： paraple

关键词： spinal cord injury motor function First Affiliated Hospital New Zealand white rabbits Bax protein experimental animals analysis of variance abdominal aorta spinal canal time point method of bax gene

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Effect of cholesterol lowering on stiffness of aortic and femoral arterial walls in rabbits on a high fat diet

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Chinese Medical Journal 2009年第12期122卷 1444-1448页

作者： XUE Li XU Wan-hai XU Jin-zhi ZHANG Tong BI Hong-yuan SHEN Bao-zhong Department of Carctiology Center of Vascular Diseases Fouth Affiliated Hospital of Harbin Medical University Harbin Heilongjiang 150001 China Department of Urinary Surgery Fouth Affiliated Hospital of Harbin Medical University Harbin Heilongjiang 150001 China Department of Cardiac Surgery Fouth Affiliated Hospital of Harbin Medical University Harbin Heilongjiang 150001 China Department of Imaging Fouth Affiliated Hospital of Harbin Medical University Harbin Heilongjiang 150001 China

Background Researches in arterial elasticity have increased over the past few years. We investigated the effects of simvastatin on vascular stiffness in fat fed rabbits by ultrasonography. Methods Thirty rabbits were assigned randomly to 3 groups： normal control group （A）, the cholesterol group （B）, simvastatin group （C： high fat diet for 4 weeks and high fat diet ＋ simvastatin for further 4 weeks）. Stiffness coefficient, pressure strain elastic modulus and velocity of pulse waves in abdominal aorta and femoral artery were measured by ultrasonographic echo tracking at the end of the 4th and the 8th weeks. Results At the end of the 4th week, stiffness coefficient, pressure strain elastic modulus and pulse wave velocity of femoral artery were significantly increased in group B compared with those in group A. Similarly, at the end of the 8th week, the same parameters of abdominal aorta were significantly increased in group B compared with those in group A. In contrast, stiffness coefficient, pressure strain elastic modulus and pulse wave velocity of femoral artery were significantly decreased in group C compared with those in group B, however, there was no significant difference in parameters of abdominal aorta between groups B and C. Conclusion Short term administration of simvastatin can improve the elasticity of femoral artery but not abdominal aorta.

关键词： ultrasonography vascular stiffness abdominal aorta femoral artery rabbits

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