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Suprarenal aneurysm

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https://www.readbyqxmd.com/read/29149960/real-renal-function-after-renal-autotransplantation-through-the-analysis-of-solitary-kidney-autotransplantation-cases
#1
J G Gwon, Y H Kim, D J Han
INTRODUCTION: Previous studies of the safety of renal autotransplantation (RAT) have been limited by a lack of evidence. Because of the influence of the opposite kidney, it is difficult to evaluate actual renal function. This study evaluated the actual results of RAT by collecting only cases involving a solitary kidney. METHODS: Between September 1, 1999, and November 30, 2015, 9 RAT procedures were performed in 9 patients with a solitary kidney. We retrospectively evaluated medical data collected prospectively...
November 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/29121844/patient-and-aneurysm-characteristics-predicting-prolonged-length-of-stay-after-elective-open-aaa-repair-in-the-endovascular-era
#2
Sergio Casillas-Berumen, Florencia A Rojas-Miguez, Alik Farber, Sevan Komshian, Jeffrey A Kalish, Denis Rybin, Gheorghe Doros, Jeffrey J Siracuse
INTRODUCTION: Open aortic aneurysm repair (AAA) repair can be resource intensive and associated with a prolonged length of stay (LOS). We sought to examine patient and aneurysm predictors of prolonged LOS to better identify those at risk in the preoperative setting. METHODS: Patient data were obtained from the targeted AAA American College of Surgery National Surgical Quality Improvement Program database from 2012 to 2014 of patients undergoing open AAA repair. Multivariable logistic regression was used to determine predictors of prolonged postoperative LOS defined as greater than 10 days (75th percentile)...
January 1, 2017: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29118111/differential-cell-matrix-mechanoadaptations-and-inflammation-drive-regional-propensities-to-aortic-fibrosis-aneurysm-or-dissection-in-hypertension
#3
M R Bersi, R Khosravi, A J Wujciak, D G Harrison, J D Humphrey
The embryonic lineage of intramural cells, microstructural organization of the extracellular matrix, local luminal and wall geometry, and haemodynamic loads vary along the length of the aorta. Yet, it remains unclear why certain diseases manifest differentially along the aorta. Toward this end, myriad animal models provide insight into diverse disease conditions-including fibrosis, aneurysm and dissection-but inherent differences across models impede general interpretations. We examined region-specific cellular, matrix, and biomechanical changes in a single experimental model of hypertension and atherosclerosis, which commonly coexist...
November 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/29017806/implementation-of-a-bundled-protocol-significantly-reduces-risk-of-spinal-cord-ischemia-after-branched-or-fenestrated-endovascular-aortic-repair
#4
Salvatore T Scali, Moses Kim, Paul Kubilis, Robert J Feezor, Kristina A Giles, Brittney Miller, Javairiah Fatima, Thomas S Huber, Scott A Berceli, Martin Back, Adam W Beck
OBJECTIVE: Spinal cord ischemia (SCI) is a devastating complication after branched or fenestrated endovascular aortic repair (B/FEVAR) for thoracoabdominal aortic disease. The purpose of this analysis was to describe the impact of a bundled clinical care protocol designed to reduce the risk of SCI in this population of patients. METHODS: A bundled SCI prevention protocol including cerebrospinal fluid drainage, blood pressure parameters, transfusion goals, and pharmacologic adjuncts (steroids, naloxone) was initiated in May 2015...
October 7, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28964618/long-term-fate-of-renal-function-after-open-surgery-for-juxtarenal-and-pararenal-aortic-aneurysm
#5
Masayuki Sugimoto, Noriko Takahashi, Kiyoaki Niimi, Akio Kodama, Hiroshi Banno, Kimihiro Komori
BACKGROUND: Although the indications for endovascular aneurysm repair for abdominal aortic aneurysm have been expanding, our primary strategy for pararenal and juxtarenal abdominal aortic aneurysm (P/JRAA) is open surgery (OS). One consequence of OS for P/JRAA is transient renal ischemia owing to renal artery clamping, which can be followed by acute kidney injury (AKI). Prior studies referred to the impact of renal ischemia on AKI, but they have rarely evaluated longer-term renal function...
September 27, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28935757/resveratrol-inhibits-growth-of-experimental-abdominal-aortic-aneurysm-associated-with-upregulation-of-angiotensin-converting-enzyme-2
#6
Corey S Moran, Erik Biros, Smriti M Krishna, Yutang Wang, Chris Tikellis, Susan K Morton, Joseph V Moxon, Mark E Cooper, Paul E Norman, Louise M Burrell, Merlin C Thomas, Jonathan Golledge
OBJECTIVE: Recent evidence suggests an important role for angiotensin-converting enzyme 2 (ACE2) in limiting abdominal aortic aneurysm (AAA). This study examined the effect of ACE2 deficiency on AAA development and the efficacy of resveratrol to upregulate ACE2 in experimental AAA. APPROACH AND RESULTS: Ace2 deletion in apolipoprotein-deficient mice (ApoE(-/-)Ace2(-/y) ) resulted in increased aortic diameter and spontaneous aneurysm of the suprarenal aorta associated with increased expression of inflammation and proteolytic enzyme markers...
November 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
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
#7
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
#8
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
#9
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
#10
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/28782415/no-difference-in-neck-enlargement-for-patients-treated-with-double-proximal-self-expandable-suprarenal-fixation-endografting
#11
COMPARATIVE STUDY
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...
October 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
#12
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
#13
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/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/28648481/outcomes-of-concomitant-renal-reconstruction-during-open-paravisceral-aortic-aneurysm-repair
#15
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...
October 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
#16
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/28632534/administration-of-tetrahydrobiopterin-bh4-protects-the-renal-microcirculation-from-ischemia-and-reperfusion-injury
#17
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/28583733/treatment-strategy-based-on-the-natural-course-of-the-disease-for-patients-with-spontaneous-isolated-abdominal-aortic-dissection
#18
Ji-Hee Kang, Young-Wook Kim, Seon-Hee Heo, Shin-Young Woo, Yang-Jin Park, Dong-Ik Kim, Duk-Kyung Kim
OBJECTIVE: This study aimed to determine the natural history of spontaneous isolated abdominal aortic dissection (SIAAD) and to establish an optimal management strategy for patients with SIAAD. METHODS: We searched the database of thoracoabdominal computed tomography (CT) performed at a single institution from January 2003 to July 2016 using the keywords "aortic dissection" and "dissection AND aorta." Once a diagnosis of SIAAD was made, we investigated the initial clinical and morphologic features and aorta-related events for all patients and morphologic changes of the aortic dissection (AD) during the follow-up period for the patients who underwent follow-up CT scans...
June 2, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28574051/-stagewise-hybrid-method-of-treating-a-patient-with-connective-tissue-dysplasia-aortic-aneurysm-and-distal-dissection
#19
É R Charchian, A A Skvortsov, D A Chakal, Z R Khachatrian
Presented herein is a clinical case report concerning the use of a hybrid technique in stagewise surgical management of a patient with distal dissection and an aneurysm of the thoracoabdominal portion of the aorta. The patient at high risk with the connective tissue dysplasia syndrome had a past medical history of prosthetic repair of the descending thoracic aorta with type-1 haemodynamic correction. Three years later, the findings of computed tomography demonstrated fenestration in the area of the distal anastomosis, a patent false channel, and an increase in the diameter of the unoperated thoracoabdominal portion of the aorta...
2017: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/28554696/-hypertension-during-takayasu-s-disease-an-algerian-single-center-experience-of-279-patients
#20
A Mammeri, R Guermaz, A Hatri, F Kessal, S Taharboucht, F Hamrour, M Ammi, S Zekri, M Brouri
INTRODUCTION: Takayasu arteritis (TA) is an uncommon large vessel arteritis. Lesions produced by the inflammatory process can be stenotic, occlusive, or aneurysmal. Vascular changes lead to the main complications, including hypertension, most often due to renal artery stenosis or, more rarely, stenosis of the suprarenal aorta. AIM OF STUDY: Our study will assess the prevalence of hypertension during TA and describe its clinical profile. MATERIAL AND METHODS: Among 279 patients with TA resulting from single center study over a period of 35 years, we collected 128 hypertensive patients...
June 2017: Annales de Cardiologie et D'angéiologie
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