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arteriovenous graft

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https://www.readbyqxmd.com/read/29050460/predialysis-hyponatremia-and-mortality-in-elderly-patients-beginning-to-undergo-hemodialysis
#1
Seon Ha Baek, Sejoong Kim, Ki Young Na, Suhnggwon Kim, Ho Jun Chin
Background/Aims: Predialysis hyponatremia has been recently reported to be associated with mortality in incident hemodialysis patients. However, whether hyponatremia is associated with unfavorable outcomes in elderly patients remains unknown. We hypothesized that nephrology referral inf luences hyponatremia, and aimed to define how nephrology referral affects the association between hyponatremia and mortality in the elderly. Methods: We retrospectively assessed mortality in 599 incident hemodialysis patients aged ≥ 70 at a tertiary university hospital, between 2000 and 2010...
October 19, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/29048463/interleukin-9-mediates-chronic-kidney-disease-dependent-vein-graft-disease-a-role-for-mast-cells
#2
Lisheng Zhang, Jiao-Hui Wu, James C Otto, Susan B Gurley, Elizabeth R Hauser, Sudha K Shenoy, Karim Nagi, Leigh Brian, Virginia Wertman, Natalie Mattocks, Jeffrey H Lawson, Neil J Freedman
Aims: Chronic kidney disease (CKD) is a powerful independent risk factor for cardiovascular events, including vein graft failure. Because CKD impairs the clearance of small proteins, we tested the hypothesis that CKD exacerbates vein graft disease by elevating serum levels of critical cytokines that promote vein graft neointimal hyperplasia. Methods and results: We modelled CKD in C57BL/6 mice with 5/6ths nephrectomy, which reduced glomerular filtration rate by 60%, and we modelled vein grafting with inferior-vena-cava-to-carotid interposition grafting...
August 31, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/29026877/prolonged-delayed-renal-graft-function-secondary-to-venous-hypertension
#3
Suraj Mishra, Gaurav Gupta, I Moinuddin, Brian Strife, Uma Prasad, D Massey, Anne King, Dhiren Kumar, Chandra S Bhati
The case of a 39-year-old highly sensitized woman who underwent second renal transplantation after being on warfarin because of a history of frequent thromboses of her left femoral arteriovenous graft (AVG) is reported here. The patient received a flow cytometric positive crossmatch kidney transplant from a deceased donor. Her posttransplant course was complicated by prolonged delayed graft function (DGF) lasting for 9 months. Antibody-mediated rejection occurred in the immediate postoperative period. This resolved after treatment, and resolution was confirmed by repeat biopsy...
October 2017: Transplantation Direct
https://www.readbyqxmd.com/read/29023551/a-multilayered-electrospun-graft-as-vascular-access-for-hemodialysis
#4
D Radakovic, J Reboredo, M Helm, T Weigel, S Schürlein, E Kupczyk, R G Leyh, H Walles, J Hansmann
Despite medical achievements, the number of patients with end-stage kidney disease keeps steadily raising, thereby entailing a high number of surgical and interventional procedures to establish and maintain arteriovenous vascular access for hemodialysis. Due to vascular disease, aneurysms or infection, the preferred access-an autogenous arteriovenous fistula-is not always available and appropriate. Moreover, when replacing small diameter blood vessels, synthetic vascular grafts possess well-known disadvantages...
2017: PloS One
https://www.readbyqxmd.com/read/28987784/peritoneal-pre-conditioning-reduces-macrophage-marker-expression-in-collagen-containing-engineered-vascular-grafts
#5
Mozhgan Shojaee, Kristin B Wood, Lisa K Moore, Chris A Bashur
Engineered vascular grafts have shown promise as arteriovenous shunts, but they have not yet progressed to clinical trials for coronary arteries <4 mm in diameter such as the coronary arteries. Control over initial biomaterial properties and remodeling are necessary to generate viable grafts. In this study, we blended collagen with a synthetic material, poly(ε-caprolactone), to modulate the post-grafting inflammatory response while avoiding aneurysmal-like dilation and failure that can occur with pure collagen grafts...
October 5, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28978278/vascularization-of-the-arterio-venous-loop-in-a-rat-isolation-chamber-model-quantification-of-hypoxia-and-evaluation-of-its-effects
#6
Quan Yuan, Andreas Arkudas, Raymund E Horch, Matthias Hammon, Oliver Bleiziffer, Michael Uder, Hannes Seuss
Introduction The aim of this study was to analyze the three-dimensional distribution of hypoxia in the arterio-venous (AV) loop model in rats, by examining the distribution of hypoxia-inducible factor-1 alpha (HIF-1α). Materials and Methods AV loops were created from the femoral artery and vein of male Lewis rats and an interpositional graft from the contralateral femoral vein. This arteriovenous fistula was embedded in a fibrin-filled isolation chamber and subcutaneously implanted into the thigh. The specimens were harvested after 7 days (n=4), 10 days (n=5) and 14 days (n=4)...
October 5, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28947453/association-of-vascular-access-flow-with-short-term-and-long-term-mortality-in-chronic-haemodialysis-patients-a-retrospective-cohort-study
#7
Chung-Kuan Wu, Chia-Lin Wu, Chia-Hsun Lin, Jyh-Gang Leu, Chew-Teng Kor, Der-Cherng Tarng
OBJECTIVES: To investigate the impact of vascular access flow (Qa) on vascular and all-cause mortality in chronic haemodialysis (HD) patients. DESIGN: Observational cohort study. SETTING: Single centre. PARTICIPANTS: Adult chronic HD patients at the HD unit of Shin Kong Wu Ho-Su Memorial Hospital between 1 January 2003 and 31 December 2003 were recruited. Patients were excluded if they had arteriovenous fistula or arteriovenous graft failure within 3 months before the date of Qa measurement, were aged <18 years and had Qa levels of ≥2000mL/min...
September 24, 2017: BMJ Open
https://www.readbyqxmd.com/read/28941968/popliteal-pseudoaneurysm-and-arteriovenous-fistula-after-arthroscopic-anterior-and-posterior-cruciate-ligament-reconstruction-a-case-report
#8
Ding Xu, Liefeng Ji, Jiang Zhu, Yuefeng Xie
INTRODUCTION: Vascular injuries are a well recognised but very rare complication of surgery or trauma around the knee, especially associated with arthroscopic anterior and posterior cruciate ligament reconstruction. PRESENTATION OF CASE: This report describes a case of a Popliteal pseudoaneurysm and arteriovenous fistula after Arthroscopic anterior and Posterior Cruciate Ligament Reconstruction. An 57-year-old male who complained of pain and swelling around the left lower extremity after the ACL and PCL reconstruction using a semitendinosus graft from the two limbs caused by bicycle accident...
August 10, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28932700/endovascular-management-of-arterial-injuries-after-blunt-or-iatrogenic-renal-trauma
#9
REVIEW
Romaric Loffroy, Olivier Chevallier, Sophie Gehin, Marco Midulla, Pierre-Emmanuel Berthod, Christophe Galland, Pascale Briche, Céline Duperron, Nabil Majbri, Christiane Mousson, Nicolas Falvo
The kidney is the third most common abdominal organ to be injured in trauma, following the spleen and liver, respectively. The most commonly used classification scheme is the American Association for the Surgery of Trauma (AAST) classification of blunt renal injuries, which grades renal injury according to the size of laceration and its proximity to the renal hilum. Arteriovenous fistula and pseudoaneurysm are the most common iatrogenic biopsy-related or surgery-related vascular injuries in native kidneys. The approach to renal artery injuries has changed over time from more aggressive intervention to more conservative observational or endovascular management, including selective transcatheter arterial embolization (TAE) and the placement of stents/stent grafts...
August 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28930719/vascular-access-placement-order-and-outcomes-in-hemodialysis-patients-a-longitudinal-study
#10
Mariana Murea, W Mark Brown, Jasmin Divers, Shahriar Moossavi, Todd W Robinson, Benjamin Bagwell, John M Burkart, Barry I Freedman
BACKGROUND: Arteriovenous accesses (AVA) in patients performing hemodialysis (HD) are labeled "permanent" for AV fistulas (AVF) or grafts (AVG) and "temporary" for tunneled central venous catheters (TCVC). Durability and outcomes of permanent vascular accesses based on the sequence in which they were placed or used receives little attention. This study analyzed longitudinal transitions between TCVC-based and AVA-based HD outcomes according to the order of placement. METHODS: All 391 patients initiating chronic HD via a TCVC between 2012 and 2013 at 12 outpatient academic dialysis units were included in this study...
September 21, 2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28904934/comparison-of-complications-of-arteriovenous-fistula-with-permanent-catheter-in-hemodialysis-patients-a-six-month-follow-up
#11
Ali Momeni, Saeed Mardani, Maryam Kabiri, Masoud Amiri
BACKGROUND: Arteriovenous fistula (AVF), permanent catheter (PC), and vascular graft are three vascular access types used for hemodialysis procedure. Due to insufficient reliable information on the comparison between AVF and PC, this study was conducted to compare AVF and PC regarding dialysis adequacy. MATERIALS AND METHODS: This prospective study was carried out from March, 2013 to September, 2013. In this study, 76 hemodialysis patients were enrolled and assigned to two unequal groups of AVF and PC...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28893630/engineered-axially-vascularized-osteogenic-grafts-from-human-adipose-derived-cells-to-treat-avascular-necrosis-of-bone-in-a-rat-model
#12
Tarek Ismail, Rik Osinga, Atanas Todorov, Alexander Haumer, Laurent A Tchang, Christian Epple, Nima Allafi, Nadia Menzi, René D Largo, Alexandre Kaempfen, Ivan Martin, Dirk J Schaefer, Arnaud Scherberich
BACKGROUND: Avascular necrosis of bone (AVN) leads to sclerosis and collapse of bone and joints. The standard of care, vascularized bone grafts, is limited by donor site morbidity and restricted availability. The aim of this study was to generate and test engineered, axially vascularized SVF cells-based bone substitutes in a rat model of AVN. METHODS: SVF cells were isolated from lipoaspirates and cultured onto porous hydroxyapatite scaffolds within a perfusion-based bioreactor system for 5 days...
September 8, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28890056/giant-chest-wall-arteriovenous-malformation-a-case-report-and-literature-review
#13
Cullen McCarthy, Subrato Deb, Suhair Maqusi, Joshua Gierman
INTRODUCTION: We present an interesting case of a 55 year-old male with a large left chest mass after significant cutaneous bleeding. CT angiogram of the chest revealed arteriovenous malformation with blood supply from subbranches of the left subclavian artery, left internal mammary artery and left external carotid artery. Measuring 5.0x14.0x10.8cm, the mass extended superior to the clavicle and inferior to the third rib with medial and lateral borders at the level of the clavicular head and coracoid, respectively...
September 7, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28887254/factors-affecting-patency-following-successful-percutaneous-intervention-for-dysfunctional-hemodialysis-vascular-access
#14
Sung Min Kim, Heung Kyu Ko, Minsu Noh, Gi-Young Ko, Min-Ju Kim, Tae-Won Kwon, Hee Jin Kim, Yong-Pil Cho
OBJECTIVE: This study aimed to investigate the patency following initial successful percutaneous transluminal angioplasty (PTA) for untreated dysfunctional hemodialysis vascular access and to identify predictors of PTA durability. METHODS: This retrospective observational study included data of 132 consecutive initial PTA of hemodialysis vascular access in 126 patients who showed immediate technical and clinical success and had at least 1 year of follow-up data...
September 5, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28877393/polyester-vascular-patches-acquire-arterial-or-venous-identity-depending-on-their-environment
#15
Hualong Bai, Haidi Hu, Jianming Guo, Maryam Ige, Tun Wang, Toshihiko Isaji, Tambudzai Kudze, Haiyang Liu, Bogdan Yatsula, Hashimoto Takuya, Ying Xing, Alan Dardik
Polyester is commonly used in vascular surgery for patch angioplasty and grafts. We hypothesized that polyester patches heal by infiltration of arterial or venous progenitor cells depending on the site of implantation. Polyester patches were implanted to the Wistar rat aorta or inferior vena cava and explanted on days 7 or 30. Neointima that formed on polyester patches was thicker in the venous environment compared to the amount that formed on patches in the arterial environment. Venous patches had more cell proliferation and greater numbers of VCAM-positive and CD68-positive cells, whereas arterial patches had greater numbers of vimentin-positive and alpha-actin-positive cells...
September 6, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28873444/effects-of-upper-extremity-vascular-access-creation-on-cardiac-events-in-patients-undergoing-coronary-artery-bypass-grafting
#16
Youngjin Han, Suk Jung Choo, Hyunwook Kwon, Jae Won Lee, Cheol Hyun Chung, Hyangkyoung Kim, Tae-Won Kwon, Yong-Pil Cho
The present study was conducted to investigate whether upper-extremity vascular access (VA) creation increases the risk for major adverse cardiac events (MACE) and death in patients undergoing coronary artery bypass grafting (CABG) with an in situ left internal thoracic artery (ITA) graft. A total of 111 patients with CABG with a left ITA graft who underwent upper-extremity VA creation were analyzed retrospectively; 93 patients received left VA creation (83.8%, ipsilateral group) and 18 patients received right VA creation (16...
2017: PloS One
https://www.readbyqxmd.com/read/28869937/prospects-for-vascular-access-education-in-developing-countries-current-situation-in-cambodia
#17
Toshihide Naganuma, Yoshiaki Takemoto
We report our activities training doctors on vascular access procedures at International University (IU) Hospital in Cambodia through a program facilitated by Ubiquitous Blood Purification International, a nonprofit organization that provides medical support to developing countries in the field of dialysis medicine. Six doctors from Japan have been involved in the education of medical personnel at IU, and we have collectively visited Cambodia about 15 times from 2010 to 2016. In these visits, we have performed many operations, including 42 for arteriovenous fistula, 1 arteriovenous graft, and 1 percutaneous transluminal angioplasty...
2017: Blood Purification
https://www.readbyqxmd.com/read/28867378/autologous-fat-transplants-to-deliver-glitazone-and-adiponectin-for-vasculoprotection
#18
William G Sanders, Huan Li, Ilya Zhuplatov, Yuxia He, Seong-Eun Kim, Alfred K Cheung, Jayant Agarwal, Christi M Terry
The insulin sensitizing glitazone drugs, rosiglitazone (ROS) and pioglitazone (PGZ) both have anti-proliferative and anti-inflammatory effects and induce adipose tissue (fat) to produce the vaso-protective protein adiponectin. Stenosis due to intimal hyperplasia development often occurs after placement of arteriovenous synthetic grafts used for hemodialysis. This work was performed to characterize the in vitro and in vivo effects of ROS or PGZ incorporation in fat and to determine if fat/PGZ depots could decrease vascular hyperplasia development in a porcine model of hemodialysis arteriovenous graft stenosis...
October 28, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28865977/safety-and-efficacy-of-polyurethane-vascular-grafts-for-early-hemodialysis-access
#19
John D Kakisis, Constantine Antonopoulos, George Mantas, Evaggelos Alexiou, Konstantina Katseni, George Sfyroeras, Konstantinos Moulakakis, George Geroulakos
BACKGROUND: Arteriovenous grafts made of polyurethane (PU) have the advantage of early cannulation obviating the placement of a central vein catheter in patients with an acute need for long-term hemodialysis. The aim of the present study was to evaluate the safety, efficacy and complication rate of PU vascular grafts for dialysis access in patients in whom early cannulation was performed. METHODS: Between January 2007 and December 2015, 125 straight brachial-axillary grafts were placed in patients with an acute thrombosis of a previous arteriovenous access...
August 30, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28857418/an-unusual-case-of-an-irretrievable-hemodialysis-catheter-in-a-patient-with-end-stage-renal-disease
#20
Mehrdad Ghahremani-Ghajar, Anna Jin, Peyman Borghei, Joline L T Chen
Hemodialysis catheters are associated with higher risks of complications compared to arteriovenous fistulas and grafts. Some common complications of dialysis catheters include infection, thrombus formation, central venous stenosis, and mechanical dysfunction. Rarely, catheters can become firmly adhered to a vessel wall. Catheter adhesion is a serious complication that can impact the delivery of safe and effective dialysis to affected patients. Adherent catheters commonly present insidiously with no overt diagnostic signs and symptoms or antecedent catheter malfunction...
August 30, 2017: Hemodialysis International
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