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Nephrology (Carlton) 2021 May 15. Epub 2021 May 15.

Nephrology division, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan.

Background: The prevalence of chronic kidney disease (CKD) is on the rise due to population aging and multimorbidity. Taiwan is particularly afflicted by this prevailing ailment. Although multidisciplinary pre-dialysis care has been implemented to halt CKD progression and reduce healthcare utilization in Taiwan, more is needed to reduce the local burden of CKD. Read More

Acta Neurol Belg 2021 May 14. Epub 2021 May 14.

Department of Neurosurgery, John Radcliffe Hospital, Headington, Oxford, OX3 9DU, UK.

CVIR Endovasc 2021 May 14;4(1):40. Epub 2021 May 14.

Department of Interventional Radiology and Neuroradiology, Ospedale San Giovanni Bosco, Torino, Italy.

Background: We report the use of a 4 mm vascular Amplatzer for the occlusion of a renal arterovenous fistula between the renal artery, at the hylum trifurcation point, and an aneurismatic vein draining into the main renal vein, where there was no possibility to use any other device from the venous side, because of the diameter and the high flow, neither from the arterious side without sacrificing lobar branches. The device was implanted at the exact point of communication, like a patent foramen ovale occluder, with the distal disc into the artery lumen and the other two proximal discs into the venous side.

Case Presentation: A 34-years-old Caucasian woman suffered several episodes of paroxysmal supraventricular tachycardia associated with dyspnoea, after the onset of post-pregnancy hypertension. Read More

Nefrologia 2021 May 10. Epub 2021 May 10.

Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Republic of Korea; Department of Nephrology, Chungnam National University Hospital, Daejeon, Republic of Korea. Electronic address:

Background: The maturation and patency of permanent vascular access are critical in patients requiring hemodialysis. Although numerus trials have been attempted to achieve permanently patent vascular access, little have been noticeable. Cilostazol, a phosphodiesterase-3 inhibitor, has been shown to be effective in peripheral arterial disease including vascular injury-induced intimal hyperplasia. Read More

Br J Neurosurg 2021 May 13:1-4. Epub 2021 May 13.

Department of Neurosurgery, West China Hospital of Sichuan University, Chengdu, PR China.

Sacral dural arteriovenous fistulas (DAVFs) with bilateral arterial supplies are extremely rare. To date, only two cases with arterial supply from bilateral lateral sacral arteries (LSAs) were reported. We report a rare case of sacral DAVF with arterial supply from bilateral LSAs. Read More

J Vasc Access 2021 May 13:1129729820976260. Epub 2021 May 13.

Department of Radiology, University Hospitals Leuven, Leuven, Belgium.

Purpose: To review the incidence and type of tunneled hemodialysis catheter (THC) complications in a large cohort of patients with end-stage renal disease. Additionally, the longevity of the THC and factors predicting high risk for catheter complications were assessed.

Material And Methods: Between August 2009 and December 2016, a cohort of 538 patients underwent primary THC insertion; in 119 patients, THC was inserted after failed arteriovenous fistula or graft. Read More

Pediatr Radiol 2021 May 12. Epub 2021 May 12.

Department of Radiology and Medical Imaging, University of Virginia Children's Hospital, Charlottesville, VA, USA.

Ultrasound (US) is the first-line imaging tool for evaluating liver and kidney transplants during and after the surgical procedures. In most patients after organ transplantation, gray-scale US coupled with color/power and spectral Doppler techniques is used to evaluate the transplant organs, assess the patency of vascular structures, and identify potential complications. In technically difficult or inconclusive cases, however, contrast-enhanced ultrasound (CEUS) can provide prompt and accurate diagnostic information that is essential for management decisions. Read More

J Vasc Access 2021 May 12:11297298211015097. Epub 2021 May 12.

Department of Nephrology, Christian Medical College, Vellore, TN, India.

Background: Difficulty in cannulation of arteriovenous fistula (AVF) can lead to inadequate dialysis, transient to permanent loss of access and increases dependency on bridging catheters. This study aimed to analyze the causes for difficult fistula cannulation, using various imaging modalities.

Methodology: This was a retrospective single-center observational study conducted between October 2017 and June 2018. Read More

Sci Rep 2021 May 11;11(1):10004. Epub 2021 May 11.

Department of Neurosurgery, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, Korea.

Initial attempt of endovascular treatment (EVT) for spinal dural arteriovenous fistula (SDAVF) is preferred because of concurrent diagnosis and treatment. However, outcomes following further treatment with initial EVT are not well studied. We retrospectively reviewed 71 patients with SDAVF to evaluate treatment outcomes of SDAVF after an initial EVT attempt. Read More

Am J Kidney Dis 2021 May 8. Epub 2021 May 8.

Section of Renal and Hypertensive Diseases, Christiana Care Health System, Newark, DE.

Ther Apher Dial 2021 May 11. Epub 2021 May 11.

Ankara City Hospital, Cardiovascular Surgery Clinic, Ankara, Turkey.

We evaluated the cost and efficacy of radiobasilic and brachiobasilic arteriovenous fistula (AVF) methods in terms of forearm autogenous arteriovenous access in haemodialysis patients. We used a decision tree to compare the cost-effectiveness of proximal radiobasilic AVF (pRBAVF) and brachiobasilic AVF (BBAVF), considering the mean direct medical costs and patency rates. The overall mean cost of pRBAVF per patient (1767. Read More

Acta Neurochir Suppl 2021 ;132:129-135

Department of Neuroendovascular Surgery, Kameda Medical Center, Kamogawa City, Chiba, Japan.

Spinal dural arteriovenous fistulas (SDAVFs) are the most common vascular shunts of the spine. They occur predominantly in men (more than 80%), commonly involve the thoracolumbar spine, and usually cause progressive myelopathy because of venous congestion of the spinal cord. Recent advanced imaging technology can visualize the detailed angioarchitecture of the spinal cord, and this provides more information of the regional microanatomy related with the shunt disease. Read More

Acta Neurochir Suppl 2021 ;132:123-127

Department of Neurosurgery, University of Toyama, Toyama, Japan.

Aims: To report the endovascular treatment and complications of intracranial and spinal dural arteriovenous (AV) fistulas.

Methods: A retrospective analysis of 863 cases with dural AV fistulas was completed in the nationwide registry study of the Japanese Society of Neuroendovascular Therapy.

Results: Treatments included transarterial/transvenous embolization (TAE/TVE), open surgery, stereotactic radiation, and their combinations. Read More

Acta Neurochir Suppl 2021 ;132:113-122

Department of Neurosurgery, ASST Grande Ospedale Metropolitano Niguarda, Milan, Italy.

Introduction: Dural arteriovenous fistulas (dAVFs) account for 10-15% of all intracranial arteriovenous lesions. Different classification strategies have been proposed in the course of the years. None of them seems to guide the treatment strategy. Read More

J Vasc Access 2021 May 10:11297298211015508. Epub 2021 May 10.

Vascular Access Center, Asklepios Clinic Barmbek, Hamburg, Germany.

Background: High-flow arteriovenous fistulae (HF-AVF) may lead to adverse cardiac remodeling in hemodialysis patients. We have investigated whether a novel external stent is safe and effective in reducing and stabilizing flow rates during a 1-year follow-up after HF-AVF reconstruction.

Methods: All patients with HF-AVF (access flow rate ⩾ 1500 ml/min), who underwent HF-AVF reconstruction with external stenting in two centers between June 2018 and May 2020, were included in this retrospective analysis. Read More

J Vasc Access 2021 May 10:11297298211015066. Epub 2021 May 10.

Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, USA.

Introduction: Dialysis vascular access, preferably an autogenous arteriovenous fistula, remains an end stage renal disease (ESRD) patient's lifeline providing a means of connecting the patient to the dialysis machine. Once an access is created, the current gold standard of care for maintenance of vascular access is angiography and angioplasty to treat stenosis. While point of care 2D ultrasound has been used to detect access problems, we sought to reproduce angiographic results comparable to the gold standard angiogram (fistulogram) using ultrasound data acquired from a conventional 2D ultrasound scanner. Read More

Cureus 2021 Apr 6;13(4):e14322. Epub 2021 Apr 6.

Radiology, Ascension Providence/Michigan State University, Southfield, USA.

Superior mesenteric arteriovenous fistulae (SMAVF) are a rare complication from trauma or iatrogenic surgical intervention. There are less than 50 cases reported in the literature and no clear guidelines as to the best practices for diagnosis and treatment. SMAVF are often asymptomatic but can present with nonspecific abdominal symptoms ranging from nausea and vomiting to gastrointestinal bleeding and mesenteric ischemia. Read More

World J Cardiol 2021 Apr;13(4):111-116

Department of Cardiology, All India Institute of Medical Sciences, Bhubaneswar Pin-751019, Odisha, India.

Background: Pulmonary artery-to-left atrial fistula is a variant of pulmonary arteriovenous fistula and is a developmental anomaly. Delayed presentation, cyanosis and effort intolerance are some of the important features. The diagnosis is confirmed by computed tomography or pulmonary artery angiography. Read More

Am J Kidney Dis 2021 May 5. Epub 2021 May 5.

Department of Nephrology and Hypertension, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH; Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, OH.

In the United States, hemodialysis remains the most common treatment modality for kidney failure, chosen by almost 90% of incident patients. A functioning vascular access is key to providing adequate hemodialysis therapy. Recently, major innovations in devices and technology for hemodialysis vascular access care have rapidly changed the landscape. Read More

Nefrologia 2021 May 5. Epub 2021 May 5.

Servicio de Nefrología, Unidad de Hemodiálisis, Complejo Asistencial de Segovia, Segovia, España.

Background And Objectives: To evaluate the pressure generated by an adjustable hemostasis clamp on arteriovenous fistulas (AVF) during the hemostasis proccess, and compare it with the direct two-finger pressure applied by the patient. To evaluate the variations of the direct two-finger pressure along the hemostasis process.

Methods: We analyzed data obtained in 51 hemodialysis procedures from 15 patients. Read More

Semin Dial 2021 May 7. Epub 2021 May 7.

Centre Nephrologie Montargis, Amilly, France.

Pain on arteriovenous fistula (AVF) cannulation is a rather persistent problem in the daily hemodialysis practice. Its prevalence varies from 12% to even 80% depending on the definition and the pain-assessment tools and it affects the quality of life of hemodialysis patients. It is associated with fear of the cannulation process, the decision of hemodialysis from an AVF and sometimes the hemodialysis itself. Read More

J Vasc Access 2021 May 7:11297298211011875. Epub 2021 May 7.

DeWitt Daughtry Family Department of Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA.

Neointimal cells are an elusive population with ambiguous origins, functions, and states of differentiation. Expansion of the venous intima in arteriovenous fistula (AVF) is one of the most prominent remodeling processes in the wall after access creation. However, most of the current knowledge about neointimal cells in AVFs comes from extrapolations from the arterial neointima in non-AVF systems. Read More

AJNR Am J Neuroradiol 2021 May 6. Epub 2021 May 6.

From the Department of Radiology and Biomedical Imaging, Interventional Neuroradiology Section, University of California, San Francisco, San Francisco, California.

Background And Purpose: AVFs of the foramen magnum region, including fistulas of the marginal sinus and condylar veins, have complex arterial supply, venous drainage, symptoms, and risk features that are not well-defined. The purpose of this study was to present the angioarchitectural and clinical phenotypes of a foramen magnum region AVF from a large, single-center experience.

Materials And Methods: We retrospectively reviewed cases from a 10-year neurointerventional data base. Read More

Interv Neuroradiol 2021 May 6:15910199211016234. Epub 2021 May 6.

Department of Neurosurgery, Oita University Faculty of Medicine, Oita, Japan.

Background And Purpose: Angioplasty of the dural sinus has rarely been performed for the treatment of cavernous sinus dural arteriovenous fistulas. We evaluated the efficacy of selective transvenous embolization (TVE) combined with balloon angioplasty of the occluded inferior petrosal sinus (IPS) for the treatment of cavernous sinus dural arteriovenous fistulas (CSDAVFs).

Materials And Methods: A total of 8 consecutive patients with CSDAVFs with occlusion of the IPS treated by selective TVE with balloon angioplasty of the IPS from July 2018 to January 2019 were retrospectively reviewed. Read More

BMJ Case Rep 2021 May 4;14(5):1-3. Epub 2021 May 4.

Radiology Department, Private Koru Hospital, Ankara, Turkey.

Herein, we describe the use of a novel multiplug flow control technique for the curative transarterial embolisation of cerebrovascular malformations using liquid embolic agents (LEAs). The idea behind the use of this technique is to substantially control or arrest flow during LEA injection, with multiple plugs simultaneously formed from microcatheters that are placed within all or multiple feeders, so that the penetration of LEAs is facilitated, with flow control decreasing the washout of a malformation. This technique enables the complete occlusion of a vascular malformation in a shorter injection time than that in other methods because penetration is achieved faster. Read More

J Vasc Access 2021 May 4:11297298211011916. Epub 2021 May 4.

Division of Nephrology and Hypertension, Louisiana State University Health Science Center in Shreveport, LA, USA.

Arteriovenous fistula (AVF) thrombosis occurs less often when compared to arteriovenous grafts. Since the number of AVFs has increased in the United States, AVF thrombosis is seen more frequently today. AVF thrombectomy can be tedious, requires physician ingenuity, and many times results in failure. Read More

Ann Vasc Surg 2021 May 1. Epub 2021 May 1.

Baylor Scott and White Research Institute at The Heart Hospital Baylor Plano, 1100 Allied Dr. Suite 500, Plano, TX 75093, United States of America.

Ischemic steal syndrome (ISS) secondary to an arteriovenous fistula (AVF) in the lower extremity (LE) is a rare occurrence. Herein, we report a case of symptomatic ISS in an adult male due to an iatrogenic AVF in the left LE, which was surgically repaired by placing an arterial stent across the acquired AVF of the peroneal artery to the peroneal vein. Read More

Ther Apher Dial 2021 May 4. Epub 2021 May 4.

Department of Pediatrics, Faculty of Medicine, Cairo University, Cairo, Egypt.

Introduction: Primary hyperoxaluria type 1 (PH1) is a rare disease that is challenged by the overproduced oxalate and commonly presented with radiopaque renal stones or obstructive uropathy. This study aimed to report clinical presentations, renal replacement therapy (RRT) and outcome of PH1 in end stage kidney disease (ESKD) children.

Methods: This is an observational cohort study. Read More

Stroke 2021 May 4:STROKEAHA120032552. Epub 2021 May 4.

Department of Neurological Surgery, Mayo Clinic, Rochester, MN. (R.M.N., L.R., L.E.S.).

World Neurosurg 2021 May;149:307-308

Department of Radiology, Mackay Memorial Hospital, Taipei Branch, Taipei, Taiwan.