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https://www.readbyqxmd.com/read/28625819/outcomes-of-relocation-of-basilic-vein-in-brachiobasilic-fistulas-in-chronic-renal-failure
#1
Farzad Kakaei, Ahad Hasankhani, Mir-Salim Seyyed-Sadeghi, Peyman Virani, Tooraj Asvadi, Sina Zarrintan
BACKGROUND: In patients without or with injured cephalic vein, using the basilic vein for creating arteriovenous fistula (AVF) is the best way for hemodialysis. In order to create AVF, the basilic vein should be superficialized and lateralized. This study sought to examine outcome of relocation of basilic vein in brachiobasilic fistulas in patients with chronic renal failure (CRF). METHODS: We evaluated the outcome of creation of brachiobasilic fistula with transposition of basilic vein in 27 patients (14 males and 13 females with mean age of 60...
June 15, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28624422/endovascular-proximal-forearm-arteriovenous-fistula-for-hemodialysis-access-results-of-the-prospective-multicenter-novel-endovascular-access-trial-neat
#2
Charmaine E Lok, Dheeraj K Rajan, Jason Clement, Mercedeh Kiaii, Ravi Sidhu, Ken Thomson, George Buldo, Christine Dipchand, Louise Moist, Joanna Sasal
BACKGROUND: Hemodialysis arteriovenous fistulas (AVFs) are suboptimally used primarily due to problems with maturation, early thrombosis, and patient nonacceptance. An endovascular approach to fistula creation without open surgery offers another hemodialysis vascular access option. STUDY DESIGN: Prospective, single-arm, multicenter study (Novel Endovascular Access Trial [NEAT]). SETTINGS & PARTICIPANTS: Consecutive adult non-dialysis-dependent and dialysis-dependent patients referred for vascular access creation at 9 centers in Canada, Australia, and New Zealand...
June 9, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28611837/embolization-of-sacral-dural-arteriovenous-fistulas-a-case-series-and-literature-review
#3
Anthony M Alvarado, Diogo C Haussen, Koji Ebersole, Raul G Nogueira, Michael G Abraham
The authors report 2 cases of sacral dural arteriovenous fistula (AVF) presenting with gradual neurologic decline characterized by progressive lower extremity weakness and bowel and bladder incontinence. Spinal angiography demonstrated a sacral dural AVF with perimedullary vein engorgement and drainage extending to the level of the cervical spine in both cases. The fistulas were completely obliterated with n-BCA (n-butyl cyanoacrylate) embolic agent in one case, and with ethylene vinyl alcohol (Onyx) in the second, resulting in improvement of the symptoms in both patients...
March 2017: Interventional Neurology
https://www.readbyqxmd.com/read/28607615/diffuse-interstitial-fibrosis-assessed-by-cardiac-magnetic-resonance-is-associated-with-dispersion-of-ventricular-repolarization-in-patients-with-hypertrophic-cardiomyopathy
#4
David Hurtado-de-Mendoza, Celia P Corona-Villalobos, Iraklis Pozios, Jorge Gonzales, Yalda Soleimanifard, Sanjay Sivalokanathan, Diego Montoya-Cerrillo, Styliani Vakrou, Ihab Kamel, Wilfredo Mormontoy-Laurel, Ketty Dolores-Cerna, Jacsel Suarez, Sergio Perez-Melo, David A Bluemke, Theodore P Abraham, Stefan L Zimmerman, M Roselle Abraham
BACKGROUND: Hypertrophic cardiomyopathy (HCM) is characterized by myocyte hypertrophy, disarray, fibrosis, and increased risk for ventricular arrhythmias. Increased QT dispersion has been reported in patients with HCM, but the underlying mechanisms have not been completely elucidated. In this study, we examined the relationship between diffuse interstitial fibrosis, replacement fibrosis, QTc dispersion and ventricular arrhythmias in patients with HCM. We hypothesized that fibrosis would slow impulse propagation and increase dispersion of ventricular repolarization, resulting in increased QTc dispersion on surface electrocardiogram (ECG) and ventricular arrhythmias...
June 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28599902/cost-effectiveness-analysis-of-vascular-access-referral-policies-in-ckd
#5
Steven M Shechter, Talon Chandler, M Reza Skandari, Nadia Zalunardo
BACKGROUND: The optimal timing of vascular access referral for patients with chronic kidney disease who may need hemodialysis (HD) is a pressing question in nephrology. Current referral policies have not been rigorously compared with respect to costs and benefits and do not consider patient-specific factors such as age. STUDY DESIGN: Monte Carlo simulation model. SETTING & POPULATION: Patients with chronic kidney disease, referred to a multidisciplinary kidney clinic in a universal health care system...
June 7, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28591486/computational-fluid-dynamic-analysis-of-the-hemodialysis-plastic-cannula
#6
David Fulker, Zakir Sayed, Anne Simmons, Tracie Barber
The jet of fluid returning to the patient through a hemodialysis venous needle has previously been reported as a potential source of endothelial damage which can lead to intimal hyperplasia (IH) in arteriovenous fistulae (AVF). Metal needles are the current standard practice for accessing the vascular system in hemodialysis. However, plastic cannulae have been used in Japan for 30 years. This study utilized computational fluid dynamics to analyze the hemodynamics of blood exiting a plastic cannula and determined the optimal placement and blood flow rate...
June 7, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28584663/clinical-pitfall-false-positive-aquaporin-4-igg-leading-to-misdiagnosis-of-neuromyelitis-optica-spectrum-disorder-in-patient-with-spinal-arteriovenous-fistula
#7
Suradech Suthiphosuwan, Jiwon Oh, Aditya Bharatha
INTRODUCTION: We report the cases of a 68-year-old male with a filum terminale arteriovenous fistula (AVF) who was initially misdiagnosed with neuromyelitis optica spectrum disorder (NMOSD) based on imaging findings and false-positive aquaporin-4 IgG (AQP4-IgG). CASE PRESENTATION: A 68-year-old male presented with slowly progressive weakness and numbness in his bilateral lower extremities. He was initially diagnosed with NMOSD and treated with immunosuppressive therapy based on findings of extensive spinal cord edema on magnetic resonance imaging (MRI) and initial negative spinal angiography as well as positive AQP4-IgG...
2017: Spinal Cord Series and Cases
https://www.readbyqxmd.com/read/28580561/-using-interdisciplinary-cooperation-to-improve-the-rate-of-proper-performance-of-a-hand-exercise-among-hemodialysis-patients-with-arteriovenous-fistula-construction
#8
Ya-Hsin Hsiao, Miao-Ling Shin, Cyong-Pei Huang, Siang-Jyun Chen, Tsuey-Yuan Huang
BACKGROUND & PROBLEMS: Patients who undergo new arteriovenous fistula (AVF) construction as part of their hemodialysis treatment program are required to perform hand exercises properly in order to maintain AVF function. However, poor performance of these hand exercises currently results in the failure of many patients to preserve AVF function. PURPOSE: To increase the rate of performing this hand exercise properly from 55% to 80%. RESOLUTION: A comprehensive investigation identified the following five main problems: (a) Insufficient muscular endurance; (b) Resistance was not labeled on the ball; (c) Difficulties with maintaining a grip on the ball during the exercise; (d) Lack of standardized education procedures; and (e) Nurses lack latest knowledge on the hand exercise...
June 2017: Hu Li za Zhi the Journal of Nursing
https://www.readbyqxmd.com/read/28574142/ultrasound-vector-flow-imaging-could-be-a-new-tool-in-evaluation-of-arteriovenous-fistulas-for-hemodialysis
#9
Ilaria Fiorina, Maria Vittoria Raciti, Alfredo Goddi, Vito Cantisani, Chandra Bortolotto, Shane Chu, Fabrizio Calliada
INTRODUCTION: We report the use of a new ultrasound technique to evaluate the axial and lateral components of a complex flow in the arteriovenous fistula (AVF). Vector Flow Imaging (VFI) allows to identify different components of the flow in every direction, even orthogonal to the flow streamline, represented by many single vectors. VFI could help to identify flow alterations in AVF, probably responsible for its malfunction. METHODS: From February to June 2016, 14 consecutive patients with upper-limb AVF were examined with a Resona 7 (Mindray, Shenzhen, China) ultrasound scanner equipped with VFI...
May 24, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28558378/pial-arteriovenous-fistula-and-capillary-malformation-arteriovenous-malformation-associated-with-rasa1-mutation-2-pediatric-cases-with-successful-surgical-management
#10
A Jessey Chugh, Asim Shahid, Sunil Manjila, Deepak Gulati, Nicholas C Bambakidis
We present case reports of 2 pediatric patients who were both found to have pial arteriovenous fistulas (AVFs) with subsequent genetic analysis revealing mutations in the RASA1 gene. Considering their family history of distinct cutaneous lesions, these mutations were likely inherited as opposed to de novo mutations. Patient 1 had large capillary malformations on the left side of the face and neck, associated with macrocephaly, and presented at the age of 32 months with speech delay, right-sided weakness, and focal seizures involving the right side of the body...
May 31, 2017: Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28553035/brachiocephalic-arteriovenous-fistula-for-hemodialysis-through-the-median-antecubital-vein
#11
E Elamurugan, R Hemachandar
In patients unsuitable for radiocephalic fistula creation, the next option is brachiocephalic fistula. In such patients, we exploited the venous interconnections in the cubital fossa for median cubital vein-Brachiocephalic arteriovenous fistula (AVF) creation. In this article, we describe our experience in the creation of such technical variant of the brachiocephalic fistula AVF, its success and associated complications. A retrospective review of such AVF created between September 2014 and August 2015 was done...
May 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/28552139/endovascular-treatment-of-spinal-arteriovenous-malformations
#12
Waleed Brinjikji, Giuseppe Lanzino
Spinal arteriovenous malformations (AVMs) are a rare but treatable cause of myelopathy and spinal cord hemorrhage. The clinical presentation and ideal treatment of these lesions vary widely, primarily due to differences in anatomic and angioarchitectural features. Six well-defined types of fistula have been defined: (1) intradural dorsal AVM; (2) intramedullary AVM; (3) extradural-intradural AVM; (4) intradural ventral AVF; (5) extradural/epidural AVF; and (6) conus medullaris AVM. Each of these lesions have unique clinical presentations and variable natural histories and endovascular treatment options...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28552136/epidemiology-clinical-presentation-diagnostic-evaluation-and-prognosis-of-spinal-arteriovenous-malformations
#13
Alp Ozpinar, Gregory M Weiner, Andrew F Ducruet
Spinal arteriovenous malformations (sAVM) are rare vascular pathologies whose natural history remains incompletely understood. Advances in diagnostic imaging, coupled with the evolution of endovascular and microsurgical techniques have led to the description of a number of classification schemes for these lesions. An updated method has changed AVM classification from five categories of lesion based on source and location of feeder vessels to three categories based on pathophysiology. These categories include extradural arteriovenous fistulae (AVFs), intradural AVFs, extradural-intradural AVFs, intramedullary AVMs, and conus medullaris AVM each with individual subclassifications...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28540993/administration-of-a-high-dose-erythropoietin-stimulating-agent-in-hemodialysis-patients-is-associated-with-late-arteriovenous-fistula-failure
#14
Hye Yun Jeong, Eun Jung Ko, Sang Hoon Kim, Mi Jung Lee, Hye Jeong Cho, Dong Ho Yang, So Young Lee
PURPOSE: Investigating the risk of vascular access failure is critical for maintenance hemodialysis (MHD) patients. Erythropoietin stimulating agents (ESA) typically used for anemia of chronic kidney disease (CKD) may also stimulate neointimal hyperplasia, which is the most important factor in late arteriovenous fistula (AVF) failure. The aim of this study was to investigate whether ESA treatment is associated with late AVF failure. MATERIALS AND METHODS: The late AVF failure group comprised 51 patients who underwent percutaneous intervention or surgery for fistula revision after successful use for at least three months...
July 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/28535103/value-frameworks-for-the-patient-provider-interaction-a-comparison-of-the-asco-value-framework-versus-nccn-evidence-blocks-in-determining-value-in-oncology
#15
Bijal Shah-Manek, Joseph S Galanto, Huong Nguyen, Robert Ignoffo
BACKGROUND: To address the rising concern about oncology drug costs, the American Society of Clinical Oncology (ASCO) and the National Comprehensive Cancer Network (NCCN) recently developed unique tools to help providers and patients make informed decisions about the value of an anticancer regimen. The ASCO Value Framework (AVF) allows users to generate a net health benefit (NHB) score along with drug acquisition costs for oncology regimens that have been compared in a prospective randomized clinical trial...
June 2017: Journal of Managed Care & Specialty Pharmacy
https://www.readbyqxmd.com/read/28534129/insomnia-muscular-cramps-and-pruritus-have-low-intensity-in-hemodialysis-patients-with-good-dialysis-efficiency-low-inflammation-and-arteriovenous-fistula
#16
Olga Hilda Orasan, Aniela Pop Saplontai, Angela Cozma, Simona Racasan, Ina Maria Kacso, Crina Claudia Rusu, Diana Moldovan, Dacian Tirinescu, Alina Potra, Ioan Mihai Patiu, Remus Aurel Orasan
INTRODUCTION: Insomnia, muscular cramps, pruritus and postdialysis recovery time (RT) are quality-of-life parameters that affect hemodialysis (HD) patients physically and mentally. METHODS: We included 171 end-stage renal disease patients: 115 on high-flux HD and 56 on online hemodiafiltration (HDF). Patients were asked "How long does it take you to recover from a dialysis session?" and they evaluated intensity (absent, mild, medium and severe) of insomnia, muscular cramps and pruritus in the past 4 weeks...
May 22, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28527110/a-review-of-the-hemodynamic-factors-believed-to-contribute-to-vascular-access-dysfunction
#17
Connor V Cunnane, Eoghan M Cunnane, Michael T Walsh
A vascular access (VA) is used to facilitate hemodialysis in patients that suffer from end-stage renal disease. However, they suffer from high failure rates due to non-maturation and venous stenosis, with intimal hyperplasia (IH) the underlying cause of both conditions. Abnormal hemodynamic profiles, which arise following VA creation, are believed to lead to the development of IH. However, the exact physiological response that initiates this process is unknown. This review evaluates the different hemodynamic parameters that are hypothesised to correlate with the development of IH...
May 19, 2017: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/28521353/intraoperative-angiography-for-arteriovenous-malformation-resection-in-the-prone-and-lateral-positions-using-upper-extremity-arterial-access
#18
Erez Nossek, David J Chalif, Razvan Buciuc, Eric J Gandras, Erich G Anderer, Sal Insigna, Amir R Dehdashti, Avi Setton
BACKGROUND: Intraoperative angiography is routinely utilized for aneurysms and arteriovenous malformations (AVMs) to verify complete occlusion and resection. Surgery for spinal and posterior fossa neurovascular lesions is usually performed in prone position. Intraoperative angiography in the prone position is challenging and there is no standardized protocol for this procedure. OBJECTIVE: To describe our experience with intraoperative angiography in the prone and lateral positions, using upper extremity arterial access...
June 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28515372/spinal-arteriovenous-shunts-angioarchitecture-and-historical-changes-in-classification
#19
Keisuke Takai
The purposes of this study were to review historical changes in the classification of spinal arteriovenous (AV) shunts and to propose a practical classification system. The associated literature regarding the classification of spinal AV shunts was reviewed in the angiography era between 1967 and 2015. The classification systems of spinal AV shunts and a proposed classification system were presented with neuroradiological imaging and medical illustrations. There have been seven major classification systems based on the evolution of diagnostic methods as well as treatments for spinal AV shunts: the first description of spinal AV shunts diagnosed and classified using spinal angiography in 1971; the second classification based on a case report of intradural direct perimedullary arteriovenous fistulas (AVFs) treated by microsurgery in 1987; the third classification based on a case series of intradural perimedullary AVFs treated by endovascular interventions in 1993; the fourth and fifth classification systems based on a case series of spinal AVFs and arteriovenous malformations (AVMs) treated by microsurgery or endovascular interventions in 2002; the sixth classification based on a case series of cranio-spinal dural AV shunts in 2009; and the seventh classification based on a case series of extradural AVFs treated by microsurgery and endovascular interventions in 2011...
May 18, 2017: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/28514785/effect-of-age-on-the-association-of-vascular-access-type-with-mortality-in-a-cohort-of-incident-end-stage-renal-disease-patients
#20
Tarek Saleh, Keiichi Sumida, Miklos Z Molnar, Praveen K Potukuchi, Fridtjof Thomas, Jun Ling Lu, Geeta G Gyamlani, Elani Streja, Kamyar Kalantar-Zadeh, Csaba P Kovesdy
BACKGROUND/AIMS: All hemodialysis (HD) patients are generally recommended to create a fistula first; but to create a mature arteriovenous fistula (AVF) can be challenging in elderly individuals. It is unclear if elderly incident HD patients derive a survival benefit from an AVF over an arteriovenous graft (AVG) or a tunneled central venous catheter (TDC). METHODS: We examined the association of vascular access type (AVF, AVG, and TDC with and without a maturing AVF/AVG at dialysis transition) at HD initiation with all-cause, cardiovascular (CV), and infection-related mortality in 46,786 US veterans using Cox models with adjustment for confounders...
May 18, 2017: Nephron
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