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Doppler ultrasound arteriovenous fistula

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https://www.readbyqxmd.com/read/29930667/klippel-trenaunay-and-parkes-weber-syndromes-two-case-reports
#1
Carlos Alberto Araujo Chagas, Lucas Alves Sarmento Pires, Marcio Antonio Babinski, Tulio Fabiano de Oliveira Leite
Parkes-Weber syndrome is a congenital vascular disease that comprises capillary, venous, lymphatic, and arteriovenous malformations. Although Parkes-Weber syndrome is a clinically distinct entity with serious complications, it is still frequently misdiagnosed as Klippel-Trenaunay syndrome, which consists of a triad of malformations involving the capillary, venous, and lymphatic vessels, without arteriovenous fistulas. Both syndromes are generally diagnosed with Doppler ultrasound and confirmed by magnetic resonance angiography...
October 2017: Jornal vascular brasileiro
https://www.readbyqxmd.com/read/29903522/vascular-access-clinic-results-before-and-after-implementing-a-multidisciplinary-approach-adding-routine-doppler-ultrasound
#2
Inés Aragoncillo Sauco, José Manuel Ligero Ramos, Almudena Vega Martínez, Ángel Luis Morales Muñoz, Soraya Abad Estébanez, Nicolás Macías Carmona, Diego Ruiz Chiriboga, Rosario García Pajares, Teresa Cervera Bravo, Juan Manuel López-Gómez, Soledad Manzano Grossi, Elena Menéndez Sánchez, Javier Río Gomez, Ana María García Prieto, Tania Linares Grávalos, Fernando Garcia Boyano, Luis Manuel Reparaz Asensio, Marta Albalate Ramón, Patricia de Sequera Ortiz, Beatriz Gil Casares, Jara Ampuero Mencía, Sandra Castellano, Belén Martín Pérez, José Luís Martín Conty, Alba Santos Garcia, José Luño Fernandez
BACKGROUND: A multidisciplinary approach and Doppler ultrasound (DU) assessment for the creation and maintenance of arteriovenous fistulas (AVF) for haemodialysis can improve prevalence and patency. The aim of this study was to analyse the impact of a new multidisciplinary vascular access (VA) clinic with routine DU. MATERIAL AND METHODS: We analysed the VA clinic results from 2014 and 2015, before and after the implementation of a multidisciplinary team protocol (vascular surgeon/nephrologist) with routine DU in preoperative mapping and prevalent AVF...
June 11, 2018: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
https://www.readbyqxmd.com/read/29779960/comparison-of-hemodialysis-arteriovenous-fistula-blood-flow-rates-measured-by-doppler-ultrasound-and-phase-contrast-magnetic-resonance-imaging
#3
Yong He, Yan-Ting Shiu, Daniel B Pike, Prabir Roy-Chaudhury, Alfred K Cheung, Scott A Berceli
OBJECTIVE: The objective of this study was to compare blood flow rates measured by Doppler ultrasound (DUS) and phase-contrast magnetic resonance imaging (MRI) in patients having a hemodialysis arteriovenous fistula (AVF) and to identify scenarios in which there was significant discordance between these two approaches. METHODS: Blood flow rates in the proximal artery (PA) and draining vein (DV) of newly created upper extremity AVFs were measured and compared using DUS and phase-contrast MRI at 1 day, 6 weeks, and 6 months postoperatively...
May 17, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29701413/true-brachial-artery-aneurysm-in-a-patient-with-vascular-access-for-haemodialysis-and-kidney-graft
#4
Mafalda Correia, André Marinho, Carolina Mendes, Luís Antunes, Óscar Gonçalves
INTRODUCTION: True brachial artery aneurysms are rare and some of them have been described as a late complication in patients with vascular access for haemodialysis and kidney graft. The purpose of this paper is to present a clinical case of a patient with a true brachial artery aneurysm and its following treatment. METHODS: This case concerns a caucasian male patient with 43 years old who had vesicoureteral reflux at 7 years old, and subsequent end-stage renal disease, and started on haemodialysis at the age of twelve...
July 2017: Revista Portuguesa de Cirurgia Cardio-torácica e Vascular
https://www.readbyqxmd.com/read/29680297/early-results-of-percutaneous-arteriovenous-fistula-creation-with-the-ellipsys-vascular-access-system
#5
Alexandros Mallios, William C Jennings, Benoit Boura, Alessandro Costanzo, Pierre Bourquelot, Myriam Combes
OBJECTIVE: We reviewed our initial experience creating a percutaneous arteriovenous fistula (pAVF) using a thermal resistance anastomosis device with proximal radial artery inflow. METHODS: A retrospective review was conducted of all patients who underwent a pAVF creation procedure between May 2017 and October 2017. Primary end points of the study were technical success, patency by Doppler ultrasound examination or angiography, flow levels achieved, time to first use, and pAVF-related complications...
April 18, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29675625/multidetector-ct-of-iatrogenic-and-self-inflicted-vascular-lesions-and-infections-at-the-groin
#6
REVIEW
Massimo Tonolini, Anna Maria Ierardi, Gianpaolo Carrafiello, Domenico Laganà
The number and complexity of endovascular procedures performed via either arterial or venous access are steadily increasing. Albeit associated with higher morbidity compared to the radial approach, the traditional common femoral artery remains the preferred access site in a variety of cardiac, aortic, oncologic and peripheral vascular procedures. Both transarterial and venous cannulation (for electrophysiology, intravenous laser ablation and central catheterisation) at the groin may result in potentially severe vascular access site complications (VASC)...
April 19, 2018: Insights Into Imaging
https://www.readbyqxmd.com/read/29577802/diameter-of-inflow-as-a-predictor-of-radiocephalic-fistula-flow
#7
Lukas K Kairaitis, James P Collett, Jan Swinnen
INTRODUCTION: The optimal method for vascular access surveillance is largely unknown. A previous case-control study suggested a simplified anatomical measure obtained by Doppler ultrasound-the narrowest segment of the circuit or "minimal luminal diameter" may identify patients with a dysfunctional radiocephalic arteriovenous fistula. The relationship between minimal luminal diameter and access flow (Qa) in the radiocephalic arteriovenous fistula has not previously been studied...
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
#8
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/29511569/vascular-access-practice-patterns-in-canada-a-national-survey
#9
Chance Dumaine, Mercedeh Kiaii, Lisa Miller, Louise Moist, Matthew J Oliver, Charmaine E Lok, Swapnil Hiremath, Jennifer M MacRae
Background: One of the mandates of the Canadian Society of Nephrology's (CSN) Vascular Access Working Group (VAWG) is to inform the nephrology community of the current status of vascular access (VA) practice within Canada. To better understand VA practice patterns across Canada, the CSN VAWG conducted a national survey. Objectives: (1) To inform on VA practice patterns, including fistula creation and maintenance, within Canada. (2) To determine the degree of consensus among Canadian clinicians regarding patient suitability for fistula creation and to assess barriers to and facilitators of fistula creation in Canada...
2018: Canadian Journal of Kidney Health and Disease
https://www.readbyqxmd.com/read/29510811/evaluation-of-new-ultrasound-techniques-for-clinical-imaging-in-selected-liver-and-vascular-applications
#10
Andreas Hjelm Brandt
This PhD project is based on a longstanding collaboration between physicists and engineers from the Center of Fast Ultrasound Imaging (CFU) at the Technical University of Denmark and medical doctors from the department of Radiology at Rigshospitalet. The intent of this cooperation is to validate new ultrasonic methods for future clinical use. 
Study I compares two B-mode ultrasound methods: the new experimental technique Synthetic Aperture Sequential Beam-forming combined with Tissue Harmonic Imaging (SASB-THI), and a conventional technique combined with THI...
March 2018: Danish Medical Journal
https://www.readbyqxmd.com/read/29410373/integration-of-real-time-intraoperative-contrast-enhanced-ultrasound-and-color-doppler-ultrasound-in-the-surgical-treatment-of-spinal-cord-dural-arteriovenous-fistulas
#11
Giuseppe Maria Della Pepa, Giovanni Sabatino, Carmelo Lucio Sturiale, Enrico Marchese, Alfredo Puca, Alessandro Olivi, Alessio Albanese
BACKGROUND: In the surgical treatment of spinal dural arteriovenous fistulas (DAVFs), intraoperative definition of anatomic characteristics of the DAVF and identification of the fistulous point is mandatory to effectively exclude the DAVF. CASE DESCRIPTION: Intraoperative ultrasound and contrast-enhanced ultrasound integrated with color Doppler ultrasound was applied in the surgical setting for a cervical DAVF to identify the fistulous point and evaluate correct occlusion of the fistula...
April 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29151789/discriminative-role-of-brachial-artery-doppler-parameters-in-correlation-with-hemodialysis-arteriovenous-fistula
#12
Burak Mehmet Çildağ, Kutsi Ömer Faruk Köseoğlu
Purpose: The aim of this study was to evaluate the flow volume and resistive index parameters of the brachial artery in the functioning and dysfunctioning radiocephalic and brachiocephalic hemodialysis arteriovenous fistula (AVF). Methods: 82 patients were distributed into three groups according to their hemodialysis function - as normal function, decreased pump flow and increased venous pressure. Flow volumes and resistive indexes (RI) of the brachial artery of radiocephalic and brachiocephalic AVFs were measured by Doppler ultrasound...
2017: Clujul Medical (1957)
https://www.readbyqxmd.com/read/28779788/transjugular-venous-approach-for-endovascular-intervention-in-upper-extremity-dialysis-access-fistulae-and-grafts
#13
REVIEW
Hector Ferral, Marc J Alonzo
A transjugular venous access is an alternative approach for endovascular intervention in upper-extremity dialysis arteriovenous fistulae and grafts. The transjugular access is recommended for patients who have an unfavorable anatomy for the direct arm access approach. Ultrasound evaluation of the arteriovenous access is essential before intervention and includes evaluation of the inflow artery and outflow vein diameters, arteriovenous anastomosis, and the entire outflow vein, specifically looking into potential problem areas...
December 2016: Seminars in Vascular Surgery
https://www.readbyqxmd.com/read/28777413/proximal-ulnar-artery-arteriovenous-fistula-inflow-is-an-uncommon-but-useful-vascular-access-option
#14
William C Jennings, Alexandros Mallios
INTRODUCTION: A proximal ulnar artery arteriovenous fistula (PUA-AVF) is a logical vascular access option when the distal ulnar artery is occluded or inadequate in addition to other specific vascular anatomic variants. This study reviews a series of patients where the proximal ulnar artery was used for AVF inflow in establishing a reliable autogenous access for these uncommon patients. MATERIALS AND METHODS: All new patients referred for vascular access with a PUA-AVF created during an eight-year period were evaluated...
November 17, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28755582/spectral-doppler-ultrasound-of-peripheral-arteries-a-pictorial-review
#15
REVIEW
Zachary Nuffer, Andrey Rupasov, Neel Bekal, Jacqueline Murtha, Shweta Bhatt
This article reviews the pathophysiology and sonographic findings of peripheral arterial lesions, with emphasis on the spectral Doppler waveforms encountered in each. It discusses the characteristic features of the Doppler spectra in obstructive conditions, including thromboembolism, atherosclerotic disease, bypass graft occlusion, dissection, trauma, and compartment syndrome, as well as non-obstructive conditions, including hyperemia, pseudoaneurysm, and arteriovenous fistula. Familiarity with the commonly-encountered spectral waveforms in the setting of these lesions is necessary for timely and accurate diagnosis and treatment...
November 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28731380/first-experience-of-performing-hybrid-operations-in-chronic-venous-obstructions-of-iliofemoral-segments-in-patients-with-postthrombotic-syndrome
#16
Anatoly Pokrovsky, Igor Ignatyev, Evgeny Gradusov
OBJECTIVE: To assess the first results of hybrid operations in chronic venous obstructions of iliofemoral segments in patients with postthrombotic syndrome (PTS). METHODS: Hybrid operations (open endovenectomy from the common femoral vein with arteriovenous fistula creation and iliac vein stenting) were performed in 12 patients diagnosed with PTS. All of the patients were diagnosed with severe chronic venous insufficiency. The degree of manifestations of PTS was assessed by means of the Villalta score 7 months before and after the surgical intervention...
October 2017: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28719480/a-rare-pediatric-case-of-posttraumatic-pseudoaneurysm-case-report-and-literature-review
#17
Ada Gu, April J Kam
Posttraumatic pseudoaneurysms are extremely rare in pediatric populations. In many cases, pseudoaneurysms may be confused with abscesses, epidermoid cysts, arteriovenous fistula, foreign objects, and ganglion cysts, as well as tumors. They are associated with distinguishing findings of "pulsatile mass, a palpable thrill, and an audible to-and-fro murmur" (1), which can be confirmed by various imaging techniques. In this report, we describe the case of a 4-year-old boy who presented to the pediatric emergency department 3 weeks after falling and subsequently getting cut by glass...
July 17, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28700182/-brachial-artery-pseudoaneurysm-a-rare-but-serious-complication-in-hemodialysis-patients-with-arteriovenous-fistula
#18
Andrea Mancini, Giuseppe Castriotta, Pernina Angelini, Michele Bozzi, Vincenzo Giancaspro, Elvira La Raia, Maria Teresa Nisi, Anna Rita Proscia, Giuseppe Tarantino, Ottavia Vitale, Cristoforo Cuzzola
A pseudoaneurysm or false aneurysm of the brachial artery is an uncommon occurrence in patients receiving hemodialysis with arteriovenous fistula (AVF). We describe the case of a 76-year-old woman presenting with a large, tender, pulsatile mass in the right antecubital region 10 cm from the AVF. B-mode ultrasound examination revealed a saccular hematoma. Color doppler showed a recirculation movement of blood, creating a two colors image called "Korean flag". The patient was transferred to the surgical unit where she first underwent ultrasound-guided compression and then surgical repair of the pseudoaneurysm...
June 2017: Giornale Italiano di Nefrologia: Organo Ufficiale Della Società Italiana di Nefrologia
https://www.readbyqxmd.com/read/28656066/endovascular-treatment-of-renal-arteriovenous-fistula-with-n-butyl-cyanoacrylate-nbca
#19
Ewa Kuklik, Michał Sojka, Klaudia Karska, Maciej Szajner
BACKGROUND: Renal arteriovenous malformation (RAVM) is a rare disease. The causes of pathological connections between renal arteries may be congenital or iatrogenic - mainly as a consequence of a biopsy or due to renal carcinomas and postinflammatory changes. Computed tomography, ultrasound Doppler and angiography are the main diagnostic tools used for the detection of RAVMs. CASE REPORT: The aim of this study is to present a case of endovascular treatment of RAVM with a mixture of NBCA and lipiodol...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28639917/concomitant-staple-aneurysmorrhaphy-and-flow-calibrated-arteriovenous-fistula-banding-over-a-coronary-dilator-to-treat-hand-steal-syndrome
#20
Jennifer Baker, Rafael D Malgor
BACKGROUND: True venous aneurysm formation can occur in patients with arteriovenous fistulas (AVFs) for hemodialysis but association with steal syndrome is uncommon. METHODS: To describe a case of a patient on chronic hemodialysis through a right brachiocephalic fistula, who presents with associated steal syndrome and true arteriovenous access aneurysm. RESULTS: A 34-year-old female with true AVF aneurysm presented with hand steal syndrome confirmed by noninvasive studies...
July 2017: Vascular and Endovascular Surgery
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