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arteriovenous graft

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https://www.readbyqxmd.com/read/29659600/reconstruction-of-a-10-mm-long-median-nerve-gap-in-an-ischemic-environment-using-autologous-conduits-with-different-patterns-of-blood-supply-a-comparative-study-in-the-rat
#1
Diogo Casal, Eduarda Mota-Silva, Inês Iria, Sara Alves, Ana Farinho, Cláudia Pen, Nuno Lourenço-Silva, Luís Mascarenhas-Lemos, José Silva-Ferreira, Mário Ferraz-Oliveira, Valentina Vassilenko, Paula Alexandra Videira, João Goyri-O'Neill, Diogo Pais
The aim of this study was to evaluate in the Wistar rat the efficacy of various autologous nerve conduits with various forms of blood supply in reconstructing a 10-mm-long gap in the median nerve (MN) under conditions of local ischemia. A 10-mm-long median nerve defect was created in the right arm. A loose silicone tube was placed around the nerve gap zone, in order to simulate a local ischemic environment. Rats were divided in the following experimental groups (each with 20 rats): the nerve Graft (NG) group, in which the excised MN segment was reattached; the conventional nerve flap (CNF) and the arterialized neurovenous flap (ANVF) groups in which the gap was bridged with homonymous median nerve flaps; the prefabricated nerve flap (PNF) group in which the gap was reconstructed with a fabricated flap created by leaving an arteriovenous fistula in contact with the sciatic nerve for 5 weeks; and the two control groups, Sham and Excision groups...
2018: PloS One
https://www.readbyqxmd.com/read/29657207/adoption-of-transposed-basilic-vein-as-access-for-hemodialysis
#2
Jacob A Akoh
The fistula first initiative has rekindled interest in transposition of basilic vein (TBV) in preference to arteriovenous grafts (AVG). TBV is considered to have advantages over AVG. The aim of this study was to analyze the outcome of TBVs in our center comparing them to a historically matched group of patients who had AVG. Thirty-two patients who underwent TBV as a vascular access procedure in Derriford Hospital between January 2010 and October 2014 were included in the study. The historical control group comprised 31 patients who had AVG inserted in the upper arm between January 1999 and December 2010...
March 2018: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/29642730/long-term-outcomes-of-bovine-pericardial-patch-angioplasty-for-recurrent-stenosis-in-vascular-access-a-uk-single-centre-experience
#3
Owain Fisher, Lewis Meecham, Pauline Buxton, Jocelyn Legge, Jack Fairhead, Sriram Rajagopalan, John Asquith, Arun Pherwani
INTRODUCTION: Stenosis of an arteriovenous fistula or arteriovenous graft for dialysis is a common problem. Stenosis may lead to a number of problems including failure of the fistula. Treatment of stenosis is commonly with percutaneous angioplasty or surgical patch angioplasty with autologous vein or synthetic graft or patch. Here we report the use of bovine pericardial patch angioplasty as an alternative mode of patch angioplasty when percutaneous intervention has failed. METHODS: Patients with fistulae treated with bovine patch angioplasty between 2013 and 2016 were identified from a prospectively maintained renal access database (Cyberren® )...
April 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29624731/a-novel-microsurgical-rodent-model-for-the-transplantation-of-engineered-cardiac-muscle-flap
#4
Richard Tee, Wayne Allan Morrison, Rodney J Dilley
BACKGROUND: The survival of engineered cardiac muscle 'grafts' to the epicardium is limited by vascularization post-transplantation in rat models. In this article, we describe the methodology of a novel rat model that allows for the transplantation of an engineered cardiac muscle flap (ECMF) onto the epicardium. MATERIALS AND METHODS: A total of 40 rats were used. Twenty-four neonatal rats were used to harvest cardiomyocytes. At week 1, ECMF were generated by seeding cardiomyocytes into the arteriovenous loop (AVL) tissue engineering chamber implanted into the right groin of adult rats (n = 8)...
April 6, 2018: Microsurgery
https://www.readbyqxmd.com/read/29614907/haemodialysis-access-thrombosis-outcomes-after-surgical-thrombectomy-versus-catheter-directed-thrombolytic-infusion
#5
Linn Koraen-Smith, Matteus Krasun, Matteo Bottai, Ulf Hedin, Carl M Wahlgren, Peter Gillgren
INTRODUCTION: Thrombosis is one of the most common complications of dialysis vascular access and is a significant source of morbidity and healthcare-associated costs. In this retrospective study, outcomes for surgical thrombectomy and thrombolysis after access thrombosis in patients with arteriovenous fistulas or prosthetic grafts (arteriovenous grafts) were analysed. METHODS: All patients with a primary episode of dialysis access thrombosis between 2005 and 2013 were included which yielded 131 patients with 149 episodes of access thrombosis (108 arteriovenous grafts; 41 arteriovenous fistulas)...
April 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29588811/effect-of-low-dose-aspirin-and-dipyridamole-on-primary-patency-of-arteriovenous-grafts-in-hemodialysis-patients-a-randomized-double-blind-placebo-controlled-trial
#6
Pouya Tayebi, Gholamhosein Kazemzadeh, Azin Banihashem, Hassan Ravari
Background: There is some evidence for the efficacy of antiplatelet therapies in increasing the vascular access patency duration or decreasing the thrombosis of arteriovenous grafts. Objective: To determine the effect of low dose aspirin and dipyridamole on primary patency of arteriovenous grafts in hemodialysis patients. Methods: This randomized, double-blind, placebo-controlled trial was done at Imam Reza Hospital in Mashhad, Iran from September 10, 2015 to July 05, 2016...
January 2018: Electronic Physician
https://www.readbyqxmd.com/read/29570754/computational-fluid-dynamics-of-vascular-disease-in-animal-models
#7
Andrea Acuna, Alycia Berman, Frederick Damen, Brett Myers, Amelia Adelsperger, Kelsey Bayer, Melissa Brindise, Brittani L Bungart, Alexander M Kiel, Rachel Morrison, Joseph Muskat, Kelsey Wasilczuk, Yi Wen, Jiacheng Zhang, Patrick Zito, Craig Goergen
Recent applications of Computational Fluid Dynamics (CFD) applied to the cardiovascular system have demonstrated its power in investigating the impact of hemodynamics on disease initiation, progression, and treatment outcomes. Flow metrics such as pressure distributions, wall shear stresses, and blood velocity profiles can be quantified to provide insight into observed pathologies, assist with surgical planning, or even predict disease progression. While numerous studies have performed simulations on clinical human patient data, it often lacks pre-diagnosis information and can be subject to large inter-subject variability, limiting the generalizability of findings...
March 21, 2018: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29567027/a-prospective-randomized-study-of-bovine-carotid-artery-biologic-graft-and-expanded-polytetrafluoroethylene-for-permanent-hemodialysis-access
#8
Hanaa Dakour Aridi, Isibor Arhuidese, Melissa Scudder, Thomas Reifsnyder, Mahmoud B Malas
OBJECTIVE: Arteriovenous grafts (AVGs) remain reliable substitutes for permanent hemodialysis access in scenarios that preclude the placement of native arteriovenous fistulas (AVFs). The majority of AVGs are constructed of expanded polytetrafluoroethylene (ePTFE), which is relatively inexpensive and readily available, but synthetic AVGs have poor patency rates. On the other hand, biologic grafts confer an advantage by virtue of their inherent similarity to the native human vasculature...
March 19, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29562840/vascular-access-for-home-haemodialysis
#9
Julien Al Shakarchi, C Day, N Inston
INTRODUCTION: Home haemodialysis has been advocated due to improved quality of life. However, there are very little data on the optimum vascular access for it. METHOD: A retrospective cohort study was carried on all patients who initiated home haemodialysis between 2011 and 2016 at a large university hospital. Access-related hospital admissions and interventions were used as primary outcome measures. RESULTS: Our cohort consisted of 74 patients...
March 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29562822/vascular-mapping-for-the-decision-of-hemodialysis-access-method-case-report
#10
Takashi Uchino, Hiromasa Nakai, Hiroaki Ichihashi, Tsukasa Sasaki, Nakanobu Azuma
Preoperative ultrasound vascular mapping was performed to determine the surgical method for two cases where standard arteriovenous fistula was not possible. In case 1, the previous arteriovenous fistula of the left arm was occluded, and arteriovenous graft of the right arm was thrombosed after frequent percutaneous transluminal angioplasty. Contrast medium was contraindicated because of allergy. Using preoperative ultrasound vascular mapping, we were able to establish the appropriate surgical method. In case 2, hemodialysis was started by catheter insertion, and then access creation was planned...
March 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29560768/a-patient-with-arteriovenous-fistula-of-simultaneously-performed-anastoplasty-for-excessive-blood-flow-and-graft-bypass-to-secure-an-outflow-tract
#11
Kanyu Miyamoto, Naoya Matsuoka, Sumihisa Ono, Shinya Nakamura, Kohei Nagaya, Nao Asai, Kazuhiro Nishikawa, Yasuhiko Ito, Hirokazu Imai
INTRODUCTION: We report a case in which we performed an anastomotic part septal formation surgery (anastoplasty) and artificial blood vessel replacement surgery. CASE DESCRIPTION: When forearm arteriovenous fistula occlusion of a dialysis patient was observed, there was a thrombus in the vein of the whole forearm from the anastomotic part. We performed a septum formation surgery to suppress the blood flow in the vein near the anastomotic site, and artificial blood vessel replacement was performed on the high stenosis of the cephalic vein of the elbow...
March 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29552941/thigh-arteriovenous-grafts-quantitative-comparison-with-alternative-options-a-meta-analysis
#12
Miltos K Lazarides, Christos Argyriou, Andreas Koutsoumpelis, Efstratios I Georgakarakos, George S Georgiadis
Thigh arteriovenous grafts are required in a number of patients with exhausted upper extremity veins and comprise 1%-5% of the total access procedures performed. Alternative autogenous lower extremity options are the rarely used sapheno-tibial arteriovenous fistulae, the saphenous vein transpositions, and the femoral vein transpositions. The latter have proven to be the most durable lower limb access procedures, with low infection rates and their primary patency rates ranged from 74% up to 87% at 2 years...
March 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29546789/safety-and-efficacy-of-the-angiojet-device-in-the-treatment-of-thrombosed-arteriovenous-fistula-and-grafts-a-systematic-review
#13
Philip Gc Chan, Gerard S Goh
PURPOSE: The AngioJet Hemolytic Thrombectomy Device "AngioJet" (Boston Scientific, Malborough, MA, USA) is a rheolytic thrombectomy device that can be used in the treatment of hemodialysis arteriovenous fistula and graft thrombosis. We aim to appraise the current evidence on AngioJet thrombectomy in hemodialysis vascular access thrombosis, and to determine its safety, including complications and efficacy. MATERIALS AND METHODS: An electronic literature search was performed on the MEDLINE and Embase databases...
March 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29544403/dialysis-arteriovenous-access-monitoring-and-surveillance-according-to-the-2017-spanish-guidelines
#14
Ramon Roca-Tey, José Ibeas, Teresa Moreno, Enrique Gruss, José Luis Merino, Joaquín Vallespín, David Hernán, Patricia Arribas
The Spanish Multidisciplinary Group on Vascular Access (GEMAV), which includes experts from the five scientific societies involved (nephrology (S.E.N.), vascular surgery (SEACV), interventional radiology (SERAM-SERVEI), infectious diseases (SEIMC), and nephrology nursing (SEDEN)), along with the methodological support of the Iberoamerican Cochrane Centre, has developed the Spanish Clinical Guidelines on Vascular Access for Hemodialysis. This article summarizes the main issues from the guideline's chapter entitled "Monitoring and surveillance of arteriovenous access...
March 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29532308/disparities-in-early-mortality-among-chronic-kidney-disease-patients-who-transition-to-peritoneal-dialysis-and-hemodialysis-with-and-without-catheters
#15
John J Sim, Hui Zhou, Jiaxiao Shi, Sally F Shaw, Shayna L Henry, Csaba P Kovesdy, Kamyar Kalantar-Zadeh, Steven J Jacobsen
PURPOSE: The early period after chronic kidney disease (CKD) patients transition to end-stage renal disease (ESRD) represents the highest mortality risk but is variable among different patient populations and clinical circumstances. We compared early mortality outcomes among a diverse CKD population that transitioned to ESRD. METHODS: A retrospective cohort study (1/1/2002 through 12/31/2013) of CKD patients (age ≥ 18 years) who transitioned to peritoneal dialysis (PD), hemodialysis (HD) with arteriovenous fistula/grafts, and HD with catheters was performed...
March 12, 2018: International Urology and Nephrology
https://www.readbyqxmd.com/read/29529969/subclavian-steal-syndrome-in-a-hemodialysis-patient-after-percutaneous-transluminal-angioplasty-of-arteriovenous-access
#16
Yoko Kaneko, Takamoto Yanagawa, Yoshinori Taru, Sonoko Hayashi, Hong Zhang, Tomoki Tsukahara, Tsuneaki Matsunaga, Takashi Ishizu
INTRODUCTION: We describe a hemodialysis patient who developed subclavian steal syndrome via an arteriovenous fistula after percutaneous transluminal angioplasty. CASE DESCRIPTION: A 55-year-old female with end-stage renal failure due to polycystic kidney disease had been treated with hemodialysis for 10 years. Because of an autologous arteriovenous fistula stenosis, percutaneous transluminal angioplasty was performed. After successful treatment with percutaneous transluminal angioplasty, the patient developed dizziness...
March 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29529963/vein-rupture-by-arrow-trerotola-percutaneous-thrombolytic-device-in-a-treatment-of-thrombosed-arteriovenous-graft
#17
Yong Kook Hong, Kyung Hoon Kang, Tae Hwan Kim, Hee Chul Yang
INTRODUCTION: We report a case of vein rupture by Arrow-Trerotola percutaneous thrombolytic device (Trerotola PTD) during a treatment of thrombosed arteriovenous graft (AVG). CASE DESCRIPTION: A 77-year-old woman with a problem of thrombosed AVG underwent an endovascular treatment including a procedure of angioplasty of axillary vein. After angioplasty of axillary vein, we found a newly developed thrombus in axillary vein and performed thrombolysis using an over-the-wire 7F Trerotola PTD...
March 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29529961/role-of-stents-in-hemodialysis-vascular-access
#18
Kenneth Abreo, Adrian Sequeira
Stents are ubiquitously utilized in coronary and peripheral arterial disease. Interventional nephrologists, however, place stents in the venous outflow of the arteriovenous access. Stenosis is the predominant pathology that causes access dysfunction and will ultimately lead to thrombosis if uncorrected. Angioplasty and stent deployment are the current techniques available to combat stenosis. From initial bare metal stainless steel stents, the current generations of stents used are predominately covered nitinol stents...
March 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29526376/clinical-effectiveness-of-open-thrombectomy-for-thrombosed-autogenous-arteriovenous-fistulas-and-grafts
#19
Amir A Ghaffarian, Ragheed Al-Dulaimi, Larry W Kraiss, Mark Sarfati, Claire L Griffin, Brigitte K Smith, Graham Donald, Benjamin S Brooke
OBJECTIVE: Arteriovenous (AV) fistulas are the preferred hemodialysis access for patients with end-stage renal disease, although multiple interventions are typically needed to maintain patency. When AV fistulas thrombose, however, there is debate as to whether open thrombectomy should be attempted, particularly for salvage of upper arm fistulas. This study was designed to evaluate outcomes after open thrombectomy of upper arm and forearm AV fistulas compared with AV grafts. METHODS: We identified all patients who underwent an open thrombectomy procedure for a thrombosed AV fistula or graft at a single academic medical center between January 2006 and March 2017...
March 8, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29525324/residential-area-life-expectancy-association-with-outcomes-and-processes-of-care-for-patients-with-esrd-in-the-united-states
#20
Jesse D Schold, Stuart M Flechner, Emilio D Poggio, Joshua J Augustine, David A Goldfarb, John R Sedor, Laura D Buccini
BACKGROUND: The effects of underlying noncodified risks are unclear on the prognosis of patients with end-stage renal disease (ESRD). We aimed to evaluate the association of residential area life expectancy with outcomes and processes of care for patients with ESRD in the United States. STUDY DESIGN: Retrospective cohort study. SETTING & PARTICIPANTS: Adult patients with incident ESRD between 2006 and 2013 recorded in the US Renal Data System (n=606,046)...
March 7, 2018: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
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