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https://www.readbyqxmd.com/read/28922970/use-of-synchrotron-radiation-to-accurately-assess-cross-sectional-area-reduction-of-the-aortic-branch-ostia-caused-by-suprarenal-stent-wires
#1
Zhonghua Sun, Curtise K C Ng
PURPOSE: To compare in vivo the use of synchrotron radiation to computed tomography angiography (CTA) for the measurement of cross-sectional area (CSA) reduction of the aortic branch ostia caused by suprarenal stent-graft wires. METHODS: This study was performed with a Zenith stent-graft placed in a phantom of the human aorta to simulate treatment of abdominal aortic aneurysm. Synchrotron radiation scans were performed using beam energies between 40 and 100 keV and spatial resolution of 19...
September 1, 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/28898997/angiotensin-ii-infusion-into-apoe-mice-a-model-for-aortic-dissection-rather-than-abdominal-aortic-aneurysm
#2
Bram Trachet, Lydia Aslanidou, Alessandra Piersigilli, Rodrigo A Fraga-Silva, Jessica Sordet-Dessimoz, Pablo Villanueva-Perez, Marco F M Stampanoni, Nikolaos Stergiopulos, Patrick Segers
Aims: Angiotensin II-infused ApoE-/- mice are a popular mouse model for preclinical aneurysm research. Here, we provide insight in the often-reported but seldom-explained variability in shape of dissecting aneurysms in these mice. Methods and results: N = 45 excised aortas were scanned ex vivo with phase-contrast X-ray tomographic microscopy. Micro-ruptures were detected near the ostium of celiac and mesenteric arteries in 8/11 mice that were sacrificed after 3 days of angiotensin II-infusion...
August 1, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28890065/comparison-of-endovascular-stent-grafts-for-abdominal-aortic-aneurysm-repair-in-medicare-beneficiaries
#3
Dominique B Buck, Peter A Soden, Sarah E Deery, Sara L Zettervall, Klaas H J Ultee, Bruce E Landon, A James O'Malley, Marc L Schermerhorn
BACKGROUND: Increased renal complications have been suggested with suprarenal stent grafts, but long-term analyses have been limited. Therefore, the purpose of this study was to evaluate the effect of endograft choice on perioperative and long-term outcomes. METHODS: We compared Medicare beneficiaries undergoing endovascular AAA repair from 2005-2008 with endografts with infrarenal fixation and a single docking limb (AneuRx, Excluder) to those with suprarenal fixation and two docking limbs (Zenith), or a unibody configuration (Powerlink)...
September 7, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28887256/remote-ischemic-preconditioning-decreases-the-magnitude-of-hepatic-ischemia-reperfusion-injury-on-a-swine-model-of-supraceliac-aortic-cross-clamping
#4
G Martikos, A Kapelouzou, M Peroulis, A Paspala, D Athanasiadis, A Maheras, T D Liakakos, K Moulakakis, S Vasdekis, A M Lazaris
BACKGROUND: Temporary hepatic ischemia is inevitable during open aortic surgery when supraceliac clamping is necessary, as in thoracoabdominal or pararenal aneurysms. Remote ischemic preconditioning (RIPC) has been described as a potential protective means against ischemia - reperfusion injury (IRI) in various tissues including the liver. The aim of this experimental study was to detect the effect of RIPC on liver IRI in a model of supraceliac aortic cross-clamping. METHODS: An animal study was performed...
September 5, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28869455/influence-of-ultrasound-microbubbles-on-kidney-oxygen-tension
#5
P Lamby, L Prantl, A Krüger-Genge, R P Franke, E M Jung, F Jung
Ultrasound contrast agents (USCA) allows the dynamic detection of blood flow of both the macro and microvasculature. An obvious prerequisite for USCAs is the unhindered passage of clinically relevant dose levels through the microcirculation especially of the lungue, where they have to pass capillaries with diameters of around 4 μm. While smaller microbubbles rapidly passed through the microcirculation along with the red blood cells, larger microbubbles, however, were observed to coalesce and interrupt the blood flow...
August 28, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28865773/in-vivo-characterization-of-the-murine-venous-system-before-and-during-dobutamine-stimulation-implications-for-preclinical-models-of-venous-disease
#6
Olivia R Palmer, Calvin B Chiu, Amos Cao, Ulrich M Scheven, Jose A Diaz, Joan M Greve
Although widely used as a preclinical model for studying venous diseases, there is a scarcity of in vivo characterizations of the naïve murine venous system. Additionally, previous studies on naïve veins (ex vivo) have not included the influence of surrounding structures and biomechanical forces. Using MRI, we noninvasively quantified the cross-sectional area, cyclic strain, and circularity of the venous system in young and old, male and female C57BL/6 mice. We investigated the most common venous locations used to perform venous disease research: the common jugular vein, suprarenal inferior vena cava (IVC), infrarenal IVC, common iliac vein, and common femoral vein...
September 1, 2017: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/28862125/solitary-adrenal-metastases-from-breast-invasive-ductal-carcinoma
#7
Cezar Stroescu, Iulian Gilca, Dragoş Chirita, Radu Poenaru, Ana Puşcaşu, Diana Pescaru, Adelina Birceanu, Cornelia Niţipir, Narcis Copcă
The usual neoplastic dissease involving suprarenal glands are adrenal metastaes. The majority of suprarenal metastatic disease arise from lung cancer, followed by the stomach and colon cancer, oesophagus, the liver/bile ducts cancer and renal cell carcinoma. Invasive mammary carcinoma usually spreads to the bones, lungs, lymph nodes, liver and the brain. Adrenal gland metastases from invasive no special type carcinoma represents an extremly low rate number of cases. We discuss about a 66 year old patient who presented with a solitary adrenal metastases from triple negative breast invasive carcinoma...
July 2017: Chirurgia
https://www.readbyqxmd.com/read/28860051/an-unusual-right-sided-suprarenal-accessory-spleen-misdiagnosed-as-an-atypical-pheochromocytoma
#8
Zenan Xia, Zhien Zhou, Zhiyuan Shang, Zhigang Ji, Weigang Yan
Compared with left suprarenal splenosis, a right suprarenal accessory spleen is more likely to be misdiagnosed as an adrenal tumor due to its extreme rarity. Especially when splenosis mimics an atypical pheochromocytoma, preoperative diagnosis may become more difficult and elusive. Herein we report the case of a female patient with a right suprarenal mass, which was suspected to be an atypical pheochromocytoma based on a history of the classic triad and positive somatostatin receptor scintigraphy, but histopathology suggested a final diagnosis of right suprarenal splenosis...
August 28, 2017: Urology
https://www.readbyqxmd.com/read/28834374/differential-distribution-of-renal-nerves-in-the-sympathetic-ganglia-of-the-rat
#9
Seishi Maeda, Mayumi Fujihira, Yusuke Minato, Sachi Kuwahara-Otani, Koichi Tanaka, Tetsu Hayakawa, Hideshi Yagi
The renal nerve plexus comprises efferent and afferent fibers. It controls urine production and bodily fluid homeostasis. Efferent fibers to the kidney include sympathetic nerve fibers from their main ganglia, the prevertebral suprarenal ganglia (SrG), and the paravertebral sympathetic chain ganglia (ChG). In the present study, we examined topological innervation from these ganglia to the renal parenchymal segments of the left kidney of the rat. Fluoro-Gold was injected into the rostral or caudal poles of the left kidney...
August 17, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28782415/no-difference-in-neck-enlargement-for-patients-treated-with-double-proximal-self-expandable-suprarenal-fixation-endografting
#10
Andrés Reyes Valdivia, Georgios Pitoulias, África Duque Santos, Martín Fabregate Fuente, Apostolos G Pitoulias, Julia Ocaña Guaita, Claudio Gandarias
INTRODUCTION: Neck enlargement is well described in patients treated with self-expandable endografts for abdominal aortic aneurysms. Double endografting (ie, overlapping of stent grafts) occurs in patients with proximal cuffs or bifurcated to monoiliacal configuration conversions. When the aortic neck of patients receives 2 suprarenal fixation endografts, it may behave differently in terms of radial force and interaction of additional suprarenal stents extending to the visceral aorta...
January 1, 2017: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28779856/editor-s-choice-renal-complications-after-evar-with-suprarenal-versus-infrarenal-fixation-among-all-users-and-routine-users
#11
S L Zettervall, S E Deery, P A Soden, K Shean, J J Siracuse, M Alef, V I Patel, M L Schermerhorn
BACKGROUND: Previous studies comparing endografts with suprarenal and infrarenal fixation for endovascular abdominal aortic aneurysm repair (EVAR) have found conflicting results and did not account for differences in patient selection. This study aims to evaluate the differences in outcomes among surgeons who routinely use either suprarenal or infrarenal fixation, as well as all surgeons in the Vascular Study Group of New England (VSGNE). METHODS: All patients undergoing EVAR in the VSGNE from 2003 to 2014 were identified...
September 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28739454/parallel-grafts-used-in-combination-with-physician-modified-fenestrated-stent-grafts-for-complex-aortic-aneurysms-in-high-risk-patients-with-hostile-anatomies
#12
Joseph Touma, Dorian Verscheure, Marek Majewski, Pascal Desgranges, Frederic Cochennec
OBJECTIVE: To evaluate the feasibility and early outcomes of complex aortic aneurysm repair in high risk patients with hostile anatomies using both parallel stents and physician-modified stent-graft (PMSG) techniques to address the renovisceral arteries METHODS: Consecutive patients with complex suprarenal (SRA) and thoracoabdominal aortic aneurysms (TAAA) undergoing endovascular repair using combined parallel stents technique and PMSG between September 2013 and November 2015 were evaluated...
July 21, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28705452/commentary-on-renal-complications-after-evar-with-suprarenal-versus-infrarenal-fixation-among-all-users-and-routine-users
#13
E S Debus, C-A Behrendt
No abstract text is available yet for this article.
September 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28689483/the-influence-of-positioning-of-the-nellix-endovascular-aneurysm-sealing-system-on-suprarenal-and-renal-flow-an-in-vitro-study
#14
Johannes T Boersen, Erik Groot Jebbink, Lennart Van de Velde, Michel Versluis, Guillaume Lajoinie, Cornelius H Slump, Jean-Paul P M de Vries, Michel M P J Reijnen
PURPOSE: To examine the influence of device positioning and infrarenal neck diameter on flow patterns in the Nellix endovascular aneurysm sealing (EVAS) system. METHODS: The transition of the aortic flow lumen into two 10-mm-diameter stents after EVAS creates a mismatched area. Flow recirculation may affect local wall shear stress (WSS) profiles and residence time associated with atherosclerosis and thrombosis. To examine these issues, 7 abdominal aortic aneurysm flow phantoms were created, including 3 unstented controls and 3 stented models with infrarenal neck diameters of 24, 28, and 32 mm...
July 1, 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/28662769/post-traumatic-rupture-of-a-suprarenal-metastasis-of-hepatocarcinoma
#15
Jose Silvestre-Rodríguez, Jaime Alonso-Gómez, Maria Del Mar Sanchez-Lauro, Francisco Cruz-Benavides, Joaquín Marchena-Gómez
No abstract text is available yet for this article.
June 26, 2017: Cirugía Española
https://www.readbyqxmd.com/read/28648481/outcomes-of-concomitant-renal-reconstruction-during-open-paravisceral-aortic-aneurysm-repair
#16
Mathew Wooster, Martin Back, Shivangi Patel, Adam Tanious, Paul Armstrong, Murray Shames
OBJECTIVE: The objective of this study was to review the outcomes of renal artery revascularizations during open aortic aneurysm repair. METHODS: Open abdominal aneurysm repairs performed from 2010 to 2015 at a single institution were reviewed, including type IV thoracoabdominal, suprarenal, and juxtarenal aneurysms. Direct renal reconstruction techniques included eversion endarterectomy, bypass, and vessel reimplantation based on the patient's anatomy. Renal loss was defined by artery occlusion...
June 22, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28640121/effects-of-anatomical-characteristics-as-factors-in-abdominal-aortic-aneurysm-rupture-ct-aortography-analysis
#17
Kyoung Min Lee, Sun Young Choi, Min Uk Kim, Do Yun Lee, Kyung Ah Kim, Sanghui Park
The aim of this study was to analyze the anatomical characteristics of patients with ruptured abdominal aortic aneurysms (AAAs) using computed tomography (CT) aortography in order to determine the risk factors for rupture.We retrospectively reviewed the CT aortography findings and medical records of patients with ruptured AAAs who underwent CT aortography between February 2002 and December 2014. Age, sex, blood pressure at the time of rupture, treatment methods used for the ruptured AAAs, and treatment outcomes were analyzed...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28633254/successful-surgical-treatment-of-an-aggressive-pelvic-angiomyxoma-with-intracardiac-extension
#18
Annastiina Husso, Jukka Savola, Jarmo Gunn
We present a case of an intravenous tumor with extension into the right atrium and right ventricle of the heart. Pelvic angiomyxoma is a rare benign tumor, which in this case carried a significant operative risk due to its extension. The patient initially presented with suspected caval and intracardiac thrombus, but unsuccessful treatment led to further investigations. The tumor was extensively dissected from the right atrium, suprarenal vena cava, and left iliac vein on cardiopulmonary bypass and deep hypothermic circulatory arrest...
July 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28632534/administration-of-tetrahydrobiopterin-bh4-protects-the-renal-microcirculation-from-ischemia-and-reperfusion-injury
#19
Lokmane Rahmania, Diego Orbegozo, Fuhong Su, Fabio Silvio Taccone, Jean-Louis Vincent, Daniel De Backer
BACKGROUND: Abdominal aortic aneurysm surgery with suprarenal cross-clamping is often associated with renal injury. Although the mechanism underlying such injury is unclear, tissue ischemia and reperfusion, which induces endothelial dysfunction and decreases the availability of tetrahydrobiopterin (BH4), may play a role. We evaluated whether BH4 administration prevents renal ischemia/reperfusion injury in an animal model of aortic cross-clamping. METHODS: Nineteen anesthetized, mechanically ventilated, and invasively monitored adult sheep were randomized into 3 groups: sham animals (n = 5) that underwent surgical preparation but no aortic clamping; an ischemia/reperfusion group (n = 7), where the aorta was clamped above the renal arteries for 1 hour, and a BH4 group (n = 7), in which animals received 20 mg/kg of BH4 followed by aortic cross-clamp for 1 hour...
October 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28628421/high-grade-serous-ovarian-cancer-associations-between-brca-mutation-status-ct-imaging-phenotypes-and-clinical-outcomes
#20
Stephanie Nougaret, Yulia Lakhman, Mithat Gönen, Debra A Goldman, Maura Miccò, Melvin D'Anastasi, Sarah A Johnson, Krishna Juluru, Angela G Arnold, Ramon E Sosa, Robert A Soslow, Hebert Alberto Vargas, Hedvig Hricak, Noah D Kauff, Evis Sala
Purpose To investigate the associations between BRCA mutation status and computed tomography (CT) phenotypes of high-grade serous ovarian cancer (HGSOC) and to evaluate CT indicators of cytoreductive outcome and survival in patients with BRCA-mutant HGSOC and those with BRCA wild-type HGSOC. Materials and Methods This HIPAA-compliant, institutional review board-approved retrospective study included 108 patients (33 with BRCA mutant and 75 with BRCA wild-type HGSOC) who underwent CT before primary debulking...
June 16, 2017: Radiology
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