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arteriovenous graft

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https://www.readbyqxmd.com/read/29470246/design-and-evaluation-of-a-structural-reinforced-small-intestinal-submucosa-vascular-graft-for-hemodialysis-access-in-a-porcine-model
#1
Juliana Jaramillo, Karen T Valencia-Rivero, Francisco J Cedano-Serrano, Rocío López, Néstor Sandoval, Juan C Briceño
Synthetic vascular access for hemodialysis exhibits biological and mechanical material properties mismatch with the native vessels. These limitations prevent infiltration of endothelial cells and decrease grafts long-term patency, particularly in small diameter vessels. We aimed to design a curved structural reinforced small intestinal submucosa (SIS) vascular graft for hemodialysis access and to evaluate in a porcine animal model graft patency by Doppler ultrasonography, tissue remodeling by histology, and vascular wall Young's modulus after implantation by biaxial tensile test...
March 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29464165/reexploring-the-anatomy-of-the-distal-humerus-for-its-role-in-providing-vascularized-bone
#2
Logan W Carr, Sebastian M Brooke, T Shane Johnson, Brett F Michelotti
Background: The lateral arm flap is used for composite defects in need of vascularized soft tissue, skin, and bone. From its original description, the distal humeral metaphysis can be included with the flap, supplied by the periosteal extensions of the posterior branch of the radial collateral artery. We sought to reexplore the anatomy of the lateral arm to determine its utility as a donor site for vascularized bone. Methods: Twelve fresh, silicone-injected cadaver dissections were performed...
January 2018: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/29461371/facial-artery-as-a-recipient-vessel-for-extensive-scalp-reconstruction-with-free-omental-flap-without-vein-graft
#3
Jin Woo Kim, Soo Hyun Woo, Suk Yoon Jang, Woo Seob Kim, Tae Hui Bae, Han Koo Kim
Most patients with reconstruction for extensive scalp defects require the use of a free flap. The suitability of the recipient vessel has a major impact on the surgery and postoperative outcome. Flaps that can be used to reconstruct the total scalp with a single flap include the latissimus dorsi (LD) and omental flaps; the LD flap is generally preferred since the omental flap results in relatively larger donor site morbidity. The recipient vessel most commonly used for scalp defect reconstruction is the superficial temporal vessel...
February 14, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29453407/neovasculature-can-be-induced-by-patching-an-arterial-graft-into-a-vein-a-novel-in-vivo-model-of-spontaneous-arteriovenous-fistula-formation
#4
Yukinobu Ito, Makoto Yoshida, Daichi Maeda, Masato Takahashi, Hiroshi Nanjo, Hirotake Masuda, Akiteru Goto
Arteriovenous malformations consist of tangles of arteries and veins that are often connected by a fistula. The causes and mechanisms of these clinical entities are not fully understood. We discovered that suturing an arterial patch into the common jugular vein of rabbits led to spontaneous neovascularization, the formation of an arteriovenous fistula and the development of an arteriovenous shunt. An arterial patch excised from the common carotid artery was sutured into the common jugular vein. Within a month, a dense nidus-like neovasculature formed around the patch...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29452835/a-comparison-of-preoperative-and-intraoperative-vein-mapping-sizes-for-arteriovenous-fistula-creation
#5
Samuel H Hui, Ryan Folsom, Lois A Killewich, Joel E Michalek, Mark G Davies, Lori L Pounds
BACKGROUND: Duplex ultrasound (DUS) mapping of the veins and arteries of the upper extremity is a well-established practice in arteriovenous fistula creation for long-term hemodialysis access. Previous publications have shown that vein diameters varying from 2 to 3 mm are predictive of success. Regional anesthesia is known to result in vasodilation and thus to increase the diameter of upper extremity veins. This study compares the sizes of veins measured by preoperative DUS mapping with those obtained after regional anesthesia to determine whether intraoperative DUS results in increased vein diameters and thus changes in the operative plan...
February 13, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29444477/the-microbiome-in-chronic-kidney-disease-patients-undergoing-hemodialysis-and-peritoneal-dialysis
#6
REVIEW
Liliana Simões-Silva, Ricardo Araujo, Manuel Pestana, Isabel Soares-Silva, Benedita Sampaio-Maia
Chronic kidney disease (CKD) is associated with an imbalanced human microbiome due not only to CKD-associated factors such as uremia, increased inflammation and immunosuppression, but also to pharmacological therapies and dietary restrictions. End-stage renal disease patients require renal replacement therapies commonly in the form of hemodialysis (HD) or peritoneal dialysis (PD). HD implies the existence of a vascular access, such as an arteriovenous fistula/graft or a venous catheter, whereas PD implies a long-term peritoneal catheter and the constant inflow of peritoneal dialysate...
February 11, 2018: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29443413/vascular-access-for-therapeutic-plasma-exchange
#7
REVIEW
Tina S Ipe, Marisa B Marques
Therapeutic plasma exchange is an apheresis modality in which plasma is separated from the blood cellular components ex vivo, discarded, and replaced with an isosmotic fluid (most commonly 5% albumin) to maintain appropriate oncotic pressure in the patient. Therapeutic plasma exchange is used in the treatment of many diseases and indications. The recent seventh edition of the American Society for Apheresis guidelines indicates approximately 72 diseases and 116 indications for which therapeutic plasma exchange may be effective...
February 2018: Transfusion
https://www.readbyqxmd.com/read/29429750/arteriovenous-fistula-maturation-in-prevalent-hemodialysis-patients-in-the-united-states-a%C3%A2-national%C3%A2-study
#8
Kenneth J Woodside, Sarah Bell, Purna Mukhopadhyay, Kaitlyn J Repeck, Ian T Robinson, Ashley R Eckard, Sudipta Dasmunshi, Brett W Plattner, Jeffrey Pearson, Douglas E Schaubel, Ronald L Pisoni, Rajiv Saran
BACKGROUND: Arteriovenous fistulas (AVFs) are the preferred form of hemodialysis vascular access, but maturation failures occur frequently, often resulting in prolonged catheter use. We sought to characterize AVF maturation in a national sample of prevalent hemodialysis patients in the United States. STUDY DESIGN: Nonconcurrent observational cohort study. SETTING & PARTICIPANTS: Prevalent hemodialysis patients having had at least 1 new AVF placed during 2013, as identified using Medicare claims data in the US Renal Data System...
February 8, 2018: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/29422845/myointimal-hyperplasia-in-a-patient-with-neuromyelitis-optica-devic-s-disease-after-the-creation-of-an-arteriovenous-graft
#9
Christina Rao, Stephanie Fox, Sapan S Desai
Neuromyelitis optica, also known as Devic's disease, is an autoimmune disorder that leads to the inflammation and demyelination of nerves. Devic's disease primarily affects the optic nerve and spinal cord, but can lead to a significant loss of function throughout the body if not treated with steroid therapy or plasmapheresis. We recently saw a 62-year-old patient who received plasmapheresis for Devic's disease through a PTFE arteriovenous graft in her left arm. Her graft clotted without warning, and percutaneous thrombolysis was not successful...
September 2017: Case Reports in Neurology
https://www.readbyqxmd.com/read/29411718/glucose-pump-test-can-be-used-to-measure-blood-flow-rate-of-native-arteriovenous-fistula-in-chronic-hemodialysis
#10
Y C Yavuz, N Y Selcuk, L Altıntepe, I Güney, S Yavuz
PURPOSE: In chronic hemodialysis patients, the low flow of vascular access may leads to inadequate dialysis, increased rate of hospitalization, morbidity, and mortality. It was found that surveillance should be performed for native arteriovenous (AV) should not be performed for AV graft in various studies. However, surveillance was done in graft AV fistulas in most studies. Doppler ultrasonography (US) was suggested for surveillance of AV fistulas by the last vascular access guideline of National Kidney Foundation Disease Outcomes Quality Initiative (NKF KDOQI)...
January 2018: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29401294/the-first-365-days-on-haemodialysis-variation-in-the-haemodialysis-access-journey-and-its-associated-burden
#11
Eleanor Murray, Mahmoud Eid, Jamie P Traynor, Karen S Stevenson, Ram Kasthuri, David B Kingsmore, Peter C Thomson
Background: The modality by which haemodialysis (HD) is delivered [arteriovenous fistula (AVF), arteriovenous graft (AVG) or central venous catheter (CVC)] varies widely and is influenced by clinical evidence, patient factors and the prevailing service configuration. The aim of this study was to determine the outcome and impact of access strategy on patient outcome by mapping out the HD journey in a cohort of incident patients. Methods: A 2-year cohort of consecutive incident HD patients from the point of referral for first dialysis access to completion of the first 365 days of HD was prospectively reviewed...
February 1, 2018: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29395485/omega-3-polyunsaturated-fatty-acid-supplementation-to-prevent-arteriovenous-fistula-and-graft-failure-a-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#12
Andrea K Viecelli, Ashley B Irish, Kevan R Polkinghorne, Carmel M Hawley, David W Johnson, Trevor A Mori, Elaine M Pascoe, Giovanni F M Strippoli, Charmaine E Lok, Suetonia C Palmer
BACKGROUND: Arteriovenous access failure frequently occurs in people on hemodialysis and is associated with morbidity, mortality and large healthcare expenditures. Omega-3 polyunsaturated fatty acids (omega-3 PUFA) may improve access outcomes via pleiotropic effects on access maturation and function, but may cause bleeding complications. STUDY DESIGN: Systematic review with meta-analysis. SETTING & POPULATION: Adults requiring hemodialysis via arteriovenous fistula or graft...
January 27, 2018: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/29390303/angioplasty-and-stenting-for-the-proximal-anastomotic-stenosis-of-a-brachio-axillary-bypass-graft-using-a-helical-interwoven-nitinol-stent-a-case-report
#13
Soo Buem Cho, Ho Cheol Choi, EunJin Bae, Tae Jin Park, Hye Jin Baek, Sung Eun Park, Kyeong Hwa Ryu, Jin Il Moon, Bo Hwa Choi, Kyungsoo Bae, Kyung Nyeo Jeon
RATIONALE: Thrombosis due to anastomotic site stenosis is the most common complication in patients with brachio-axillary arteriovenous graft (AVG). Intravascular stent placement may play a special role in the salvage of dialysis grafts that have been previously performed percutaneous angioplasty or surgical procedure on the graft. Herein, we applied a novel stent named Supera which has a high degree of flexibility and resistance to external compression for treating a patient with recurrent venous anastomotic stenosis of brachio-axillary AVG...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29376625/surgical-revision-vs-stent-graft-to-treat-venous-anastomosis-stenosis-following-surgical-thrombectomy-of-hemodialysis-grafts
#14
Jana Janeckova, Petr Bachleda, Petr Utikal, Martin Köcher, Marie Cerna, Pavel Xinopulos
BACKGROUND: There is no unanimous strategy for treating stenosis of the venous anastomosis (VA) of an occluded arteriovenous graft (AVG) following surgical thrombectomy. In this study, we compared classical surgical treatment and endovascular treatment procedures with the use of stent- graft in a single center study. The aim was to evaluate whether, the VA stenosis of thrombosed AVG treated endovascularly by stent-graft implantation, have as good results as surgical VA treatment, so that it may be considered the method of choice...
January 26, 2018: International Angiology: a Journal of the International Union of Angiology
https://www.readbyqxmd.com/read/29373244/race-and-sex-disparities-in-outcomes-of-dialysis-access-maintenance-interventions
#15
Premal S Trivedi, Kimberly E Lind, Charles E Ray, Paul J Rochon, Robert K Ryu
PURPOSE: To determine whether utilization and outcomes of dialysis access maintenance interventions vary by patient race or sex. MATERIALS AND METHODS: Data for this retrospective cohort study of first-time arteriovenous (AV) access recipients were drawn from a 5% sample of Medicare beneficiaries, containing claims from all clinical settings (2009-2014) in 2,693 patients who received their first AV fistula/graft in 2009. Maintenance interventions-angiography, angioplasty, thrombolysis, stent placement, and venous embolization-were identified by corresponding Current Procedural Terminology codes...
January 17, 2018: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/29354627/vascular-complications-related-to-posterior-lumbar-disc-surgery
#16
Hong Sung Jung, Dae Jung Kim, Hyo Shin Kim, Ho Kyun Lee, Soo Jin Na Choi, Sang Young Chung
Purpose: To evaluate patients who underwent surgical or endovascular treatment after vascular injury related to posterior lumbar disc surgery. Materials and Methods: We retrospectively reviewed seven cases of vascular injuries (four lacerations, one arteriovenous fistula [AVF], and two pseudoaneurysms) related to lumbar disc surgery by a posterior approach from January 1997 to December 2016 at Chonnam National University Hospital. Information of patient characteristics, diagnosis, treatment strategies, and outcomes were analyzed...
December 2017: Vascular Specialist International
https://www.readbyqxmd.com/read/29349426/development-of-a-pulsatile-tissue-based-versatile-vascular-surgery-simulation-laboratory-for-resident-training
#17
Brian Fletcher, Jaime De La Ree, James Drougas
Simulation in surgery is becoming an important component of surgical education. Training on bench top models has been demonstrated to improve technical skills. The objective of our project was to create a vascular surgery simulation model. The simulation model consists of a platform, artificial blood reservoir, artificial blood, inflow and outflow limbs, electric motor, battery, pulse generator, and cryopreserved vessel. Three different vascular surgery simulation stations were created: carotid endarterectomy with shunting and patch angioplasty, arterial bypass, and arteriovenous graft formation...
December 2017: Journal of Vascular Surgery Cases and Innovative Techniques
https://www.readbyqxmd.com/read/29313113/epidemiology-and-contemporary-management-of-abdominal-aortic-aneurysms
#18
Brant W Ullery, Richard L Hallett, Dominik Fleischmann
Abdominal aortic aneurysm (AAA) is most commonly defined as a maximal diameter of the abdominal aorta in excess of 3 cm in either anterior-posterior or transverse planes or, alternatively, as a focal dilation ≥ 1.5 times the diameter of the normal adjacent arterial segment. Risk factors for the development of AAA include age > 60, tobacco use, male gender, Caucasian race, and family history of AAA. Aneurysm growth and rupture risk appear to be associated with persistent tobacco use, female gender, and chronic pulmonary disease...
January 9, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29307022/fluorescein-videoangiography-during-extracranial-to-intracranial-bypass-surgery-preliminary-results
#19
Alessandro Narducci, Julia Onken, Marcus Czabanka, Nils Hecht, Peter Vajkoczy
BACKGROUND: Over the last years, intraoperative use of fluorescein is gaining ground in the field of neurosurgery, due to development of a microscope-integrated YELLOW 560 module, with reported experiences in brain malignancies, aneurysms, and arteriovenous malformation surgery. The aim of this study is to determine the feasibility and value of fluorescein videoangiography during bypass procedures. METHODS: The authors enrolled 11 patients who underwent extracranial-to-intracranial bypass for moyamoya disease, atherosclerotic steno-occlusive cerebrovascular disease, and flow replacement during a giant middle cerebral artery (MCA) aneurysm treatment...
January 6, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29283056/drug-coated-balloons-technologies-and-clinical-applications
#20
Huiying Ang, Jinjie Lin, Ying Ying Huang, Tze Tec Chong, Salvatore Cassese, Michael Joner, Nicolas Foin
The progress and development of drug-coated balloons (DCBs) represents an emerging alternative treatment in peripheral and coronary artery diseases, particularly when a non-stent approach is necessary. Several studies and meta-analyses have evaluated the clinical outcomes of DCBs in different lesions and this review aims to compile the progress and updated clinical data of DCB strategy in both peripheral artery diseases (PAD) and coronary artery diseases (CAD). The review highlights that clinical data encouraged the use of DCB for applications in PAD and in the treatment of coronary in-stent restenosis (ISR)...
December 27, 2017: Current Pharmaceutical Design
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