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https://www.readbyqxmd.com/read/29153534/configuration-affects-parallel-stent-grafting-results
#1
Adam Tanious, Mathew Wooster, Paul A Armstrong, Bruce Zwiebel, Shane Grundy, Martin R Back, Murray L Shames
OBJECTIVE: A number of adjunctive "off-the-shelf" procedures have been described to treat complex aortic diseases. Our goal was to evaluate parallel stent graft configurations and to determine an optimal formula for these procedures. METHODS: This is a retrospective review of all patients at a single medical center treated with parallel stent grafts from January 2010 to September 2015. Outcomes were evaluated on the basis of parallel graft orientation, type, and main body device...
November 16, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28918189/effects-of-temperature-and-peg-grafting-density-on-the-translocation-of-pegylated-nanoparticles-across-asymmetric-lipid-membrane
#2
Zuoheng Zhang, Xubo Lin, Ning Gu
Plasma membrane internalization of nanoparticles (NPs) is important for their biomedical applications such as drug-delivery carriers. On one hand, in order to improve their half-life in circulation, PEGylation has been widely used. However, it may hinder the NPs' membrane internalization ability. On the other hand, higher temperature could enhance the membrane permeability and may affect the NPs' ability to enter into or exit from cells. To make full use of their advantages, we systematically investigated the effects of temperature and PEG density on the translocation of PEGylated nanoparticles across the plasma asymmetric membrane of eukaryotic cells, using near-atom level coarse-grained molecular dynamics simulations...
September 6, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28774222/transradial-delivery-of-a-renal-snorkel-during-complex-endovascular-aortic-aneurysm-repair
#3
Jordan R Stern, Sharif H Ellozy
Transradial access has been described in a variety of clinical contexts but has been rarely utilized for visceral artery interventions and during complex endovascular aortic aneurysm repair (EVAR) when upper extremity access is required. This is usually accomplished via brachial artery access, and although brachial access is generally safe and effective, radial access may offer some benefits with regard to patient comfort and potential complications. Here we report a case of successful delivery of a renal snorkel via a radial artery approach during EVAR...
October 2017: 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
#4
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/28390918/dynamic-geometric-analysis-of-the-renal-arteries-and-aorta-following-complex-endovascular-aneurysm-repair
#5
Brant W Ullery, Ga-Young Suh, John J Kim, Jason T Lee, Ronald L Dalman, Christopher P Cheng
BACKGROUND: Aneurysm regression and target vessel patency during early and mid-term follow-up may be related to the effect of stent-graft configuration on the anatomy. We quantified geometry and remodeling of the renal arteries and aneurysm following fenestrated (F-) or snorkel/chimney (Sn-) endovascular aneurysm repair (EVAR). METHODS: Twenty-nine patients (mean age, 76.8 ± 7.8 years) treated with F- or Sn-EVAR underwent computed tomography angiography at preop, postop, and follow-up...
August 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28259824/endovascular-management-of-proximal-fixation-loss-using-parallel-stent-grafting-techniques-to-preserve-visceral-flow
#6
Adam Tanious, Mathew Wooster, Andrew Jung, Peter R Nelson, Martin R Back, Murray L Shames
BACKGROUND: Proximal fixation loss following endovascular aortic aneurysm repair (EVAR) creates a clinical dilemma. Typically, endovascular salvage requires adequate aortic neck below the renal arteries, in cases with no infrarenal neck proximal extension into the paravisceral aorta using parallel grafts provides an alternative to open graft explant. We present our experience at a tertiary care center with endovascular management of proximal fixation loss following EVAR using parallel stent grafting techniques to preserve renal and visceral branches...
March 1, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28242400/endovascular-management-of-a-ruptured-aortic-arch-pseudoaneurysm-using-the-snorkel-technique-and-coil-embolization
#7
Tao Ma, Zhi Hui Dong, Wei Guo Fu, Bin Chen, Jun Hao Jiang, Yun Shi
We report a reoperation case of a ruptured infectious aortic arch pseudoaneurysm, which was stabilized with thoracic endovascular aortic repair and snorkel bypass of the innominate artery (IA) and the left common carotid artery (LCCA). A 57-year-old Chinese woman with multiple comorbidities and previous open repair for Stanford type A aortic dissection 5 years ago presented with a ruptured 10.7 cm × 7.3 cm aortic arch pseudoaneurysm involving the origins of the LCCA and the left subclavian artery. The patient underwent emergent endovascular aortic repair with placement of a stent graft in both IA and left carotid artery coursing parallel to the aortic arch endograft...
May 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28238925/early-experience-with-snorkels-and-chimneys-for-expanding-the-indications-for-use-of-endovascular-aneurysm-repair
#8
Mathew Wooster, Bruce Zwiebel, Martin Back, Murray Shames
BACKGROUND: Although fenestrated and branched devices for juxtarenal and paravisceral aneurysms are available worldwide, limited ultrasound availability has perpetuated widespread utilization of adjunctive techniques for the endovascular treatment of these aneurysms. The objective of the study is to report on the technical feasibility and short-term durability of parallel grafts for juxtarenal and paravisceral aneurysms. METHODS: We performed a retrospective review of a prospectively collected endovascular aneurysm repair database, including all patients who underwent a parallel stent procedure...
May 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27823593/snorkel-endovascular-abdominal-aortic-aneurysm-repair-versus-fenestrated-endovascular-aneurysm-repair-is-it-a-competition
#9
REVIEW
Adam Tanious, Jason T Lee, Murray Shames
The endovascular treatment of juxtarenal abdominal aortic aneurysm (AAA) can be performed by either a standard endovascular stent graft with additional snorkle grafts to aorta branches (snorkel endovascular aneurysm repair) or implantation of a fenestrated stent graft (fenestrated endovascular aneurysm repair). While many vascular surgeons consider snorkel endovascular aneurysm repair and fenestrated endovascular aneurysm repair to be competing techniques or alternate strategies, published procedural outcomes suggest more complementary roles...
March 2016: Seminars in Vascular Surgery
https://www.readbyqxmd.com/read/27127562/minimally-invasive-techniques-for-total-aortic-arch-reconstruction
#10
REVIEW
Jason Faulds, Harleen K Sandhu, Anthony L Estrera, Hazim J Safi
The cumulative experience with endovascular aortic repair in the descending thoracic and infrarenal aorta has led to increased interest in endovascular aortic arch reconstruction. Open total arch replacement is a robust operation that can be performed with excellent results. However, it requires cardiopulmonary bypass and circulatory arrest and, therefore, may not be tolerated by all patients. Minimally invasive techniques have been considered as an alternative and include hybrid arch debranching, parallel stent graft deployment in the chimney and snorkel configurations, and complete endovascular branched reconstruction with multi-branched devices...
January 2016: Methodist DeBakey Cardiovascular Journal
https://www.readbyqxmd.com/read/27027393/endovascular-treatment-of-aortoiliac-aneurysms-from-intentional-occlusion-of-the-internal-iliac-artery-to-branch-iliac-stent-graft
#11
REVIEW
Stevo Duvnjak
Approximately 20%-40% of patients with abdominal aortic aneurysms can have unilateral or bilateral iliac artery aneurysms and/or ectasia. This influences and compromises the distal sealing zone during endovascular aneurysm repair. There are a few endovascular techniques that are used to treat these types of aneurysms, including intentional occlusion/over-stenting of the internal iliac artery on one or both sides, the "bell-bottom" technique, and the more recent method of using an iliac branch stent graft. In some cases, other options include the "snorkel and sandwich" technique and hybrid interventions...
March 28, 2016: World Journal of Radiology
https://www.readbyqxmd.com/read/27013644/fenestrated-stent-grafts-for-the-treatment-of-complex-aortic-aneurysm-disease-a-mature-treatment-paradigm
#12
REVIEW
George S Georgiadis, Joost A van Herwaarden, George A Antoniou, Athanasios D Giannoukas, Miltos K Lazarides, Frans L Moll
The introduction of fenestrated stent grafts (SGs) to treat abdominal aortic aneurysms (AAAs) with short proximal necks began in 1999. Nowadays, the whole visceral aorta can be treated totally by endovascular means. The established use of fenestrated devices to treat complex AAAs as a first-line management option has been previously reported. An up-to-date evaluation of the literature was performed including all types of publications regarding the use of fenestrated technology to repair complex AAAs. Fenestrated repair is now an established alternative to hybrid/chimney/snorkel repairs...
June 2016: Vascular Medicine
https://www.readbyqxmd.com/read/26947527/implications-of-renal-artery-anatomy-for-endovascular-repair-using-fenestrated-branched-or-parallel-stent-graft-techniques
#13
Bernardo C Mendes, Gustavo S Oderich, Leonardo Reis de Souza, Peter Banga, Thanila A Macedo, Randall R DeMartino, Sanjay Misra, Peter Gloviczki
OBJECTIVE: This study evaluated renal artery (RA) and accessory renal artery (ARA) anatomy and implications for endovascular repair using fenestrated, branched, or parallel (chimney, snorkel, and periscope) stent graft techniques. METHODS: We analyzed the digital computed tomography angiograms of 520 consecutive patients treated by open or fenestrated endovascular repair for complex abdominal aortic aneurysms (2000-2012). RA/ARA anatomy was assessed using diameter, length, angles, and kidney perfusion based on analysis of estimated volumetric kidney parenchyma...
May 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/26794899/outcomes-of-total-endovascular-treatment-of-juxtarenal-aortic-aneurysms-in-octogenarians
#14
Diogo Silveira, Georgios Pitoulias, Giovanni Torsello, Konstantinos P Donas
OBJECTIVE: We set out to present the late 3-year performance of total endovascular treatment of juxtarenal aortic aneurysms in octogenarians by the chimney/snorkel technique. METHODS: At one center, between January 2009 and December 2014, chimney/snorkel technique-endovascular aortic aneurysm repair was performed in 35 high-risk unfit-for-open-repair octogenarian patients with juxtarenal aortic aneurysms. Twenty-five patients were asymptomatic (71.4%), and 10 patients were treated in an urgent care setting...
April 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/26794885/european-multicenter-registry-for-the-performance-of-the-chimney-snorkel-technique-in-the-treatment-of-aortic-arch-pathologic-conditions
#15
MULTICENTER STUDY
Michel J Bosiers, Konstantinos P Donas, Nicola Mangialardi, Giovanni Torsello, Vincent Riambau, Frank J Criado, Frank J Veith, Sonia Ronchey, Stefano Fazzini, Mario Lachat
BACKGROUND: To study the performance of the chimney technique in the treatment of aortic arch pathologic conditions. METHODS: We retrospectively evaluated the clinical and procedural outcome data of patients undergoing endovascular treatment in the aortic arch by use of the chimney technique at four European centers between June 2002 and December 2014. The primary endpoint was technical success. The secondary endpoints were type I endoleak, 30-day mortality, stroke, primary patency of the chimney graft, and freedom from reintervention...
June 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/26755068/comparative-geometric-analysis-of-renal-artery-anatomy-before-and-after-fenestrated-or-snorkel-chimney-endovascular-aneurysm-repair
#16
COMPARATIVE STUDY
Brant W Ullery, Ga-Young Suh, Jason T Lee, Brian Liu, Robert Stineman, Ronald L Dalman, Christopher P Cheng
OBJECTIVE: The durability of stent grafts may be related to how procedures and devices alter native anatomy. We aimed to quantify and compare renal artery geometry before and after fenestrated (F-) or snorkel/chimney (Sn-) endovascular aneurysm repair (EVAR). METHODS: Forty patients (75 ± 6 years) underwent computed tomographic angiography before and after F-EVAR (n = 21) or Sn-EVAR (n = 19), with a total of 72 renal artery stents. Renal artery geometry was quantified using three-dimensional model-based centerline extraction...
April 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/26476671/the-protagoras-study-to-evaluate-the-performance-of-the-endurant-stent-graft-for-patients-with-pararenal-pathologic-processes-treated-by-the-chimney-snorkel-endovascular-technique
#17
MULTICENTER STUDY
Konstantinos P Donas, Giovanni B Torsello, Gianluca Piccoli, Georgios A Pitoulias, Giovanni Federico Torsello, Theodosios Bisdas, Martin Austermann, Daniele Gasparini
OBJECTIVE: The chimney/snorkel endovascular aortic repair (ch-EVAR) is gaining ever-greater acceptance in the treatment of pararenal pathologic processes. However, the published experience includes mainly short-term clinical results with combinations of several abdominal devices and types of chimney grafts. The aim of this study was the midterm evaluation of the Endurant stent graft (Medtronic, Santa Rosa, Calif) as a standard abdominal device for ch-EVAR. METHODS: Between January 2009 and January 2013, prospectively collected data of high-risk patients with pararenal pathologic processes who underwent ch-EVAR with placement of the Endurant abdominal device were analyzed...
January 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/26327748/advanced-endovascular-approaches-in-the-management-of-challenging-proximal-aortic-neck-anatomy-traditional-endografts-and-the-snorkel-technique
#18
REVIEW
Jon G Quatromoni, Ksenia Orlova, Paul J Foley
Advances in endovascular technology, and access to this technology, have significantly changed the field of vascular surgery. Nowhere is this more apparent than in the treatment of abdominal aortic aneurysms (AAAs), in which endovascular aneurysm repair (EVAR) has replaced the traditional open surgical approach in patients with suitable anatomy. However, approximately one-third of patients presenting with AAAs are deemed ineligible for standard EVAR because of anatomic constraints, the majority of which involve the proximal aneurysmal neck...
September 2015: Seminars in Interventional Radiology
https://www.readbyqxmd.com/read/26258324/collected-world-experience-about-the-performance-of-the-snorkel-chimney-endovascular-technique-in-the-treatment-of-complex-aortic-pathologies-the-pericles-registry
#19
MULTICENTER STUDY
Konstantinos P Donas, Jason T Lee, Mario Lachat, Giovanni Torsello, Frank J Veith
OBJECTIVES: We sought to analyze the collected worldwide experience with use of snorkel/chimney endovascular aneurysm repair (EVAR) for complex abdominal aneurysm treatment. BACKGROUND: EVAR has largely replaced open surgery worldwide for anatomically suitable aortic aneurysms. Lack of availability of fenestrated and branched devices has encouraged an alternative strategy utilizing parallel or snorkel/chimney grafts (ch-EVAR). METHODS: Clinical and radiographic information was retrospectively reviewed and analyzed on 517 patients treated by ch-EVAR from 2008 from 2014 by prearranged defined and documented protocols...
September 2015: Annals of Surgery
https://www.readbyqxmd.com/read/26187702/snorkel-chimney-stent-morphology-predicts-renal-dysfunction-after-complex-endovascular-aneurysm-repair
#20
Kenneth Tran, Brant W Ullery, Jason T Lee
BACKGROUND: Despite the high technical success and midterm patency of snorkel stents, concerns remain about structural durability and its effect on long-term renal function. We sought to evaluate the luminal stability of renal snorkel stents to investigate morphologic predictive factors of renal dysfunction after snorkel/chimney endovascular aneurysm repair (sn-EVAR). METHODS: Patients with high quality computer tomography angiography after sn-EVAR between 2009 and 2013 were included for analysis...
January 2016: Annals of Vascular Surgery
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