Doppler ultrasound arteriovenous fistula

Digital hypoperfusion ischaemic syndrome (DHIS), also known as steal syndrome, is a well recognised serious complication of haemodialysis (HD) access creation. The clinical presentation varies from cyanosis to tissue loss due to necrosis or gangrene. In this article, we present a case of painless digital ulceration due to DHIS and provide a review of the literature. A 40-year-old-female presented with multiple painless digital ulcerations of the left hand. Her medical profile included atherosclerotic disease, hypertension, hyperparathyroidism and type I diabetes causing retinopathy, peripheral neuropathy, gastroparesis and end-stage renal disease (ESRD)...

OBJECTIVE: High-flow vascular access is one of the serious complications in the maturation and subsequent use of arteriovenous fistula (AVF). We adopted a novel surgical approach named no incision limited ligation indwelling needle assisted- revision (NILLINR) to treat high-flow of the hemodialysis vascular access and ascertained the outcomes by regular follow-up visits. METHODS: This is a retrospective study. 26 hemodialysis patients with symptomatic high-flow access (access flow > 1500 mL/min) were treated with the novel banding method without incision between June 2018 and October 2020...

Non-ischemic priapism (NiP) is painless partial tumescence caused by genital trauma and the formation of intracorporal arterio-venous fistula. This is a retrospective study of 25 men with NiP and reports the long-term erectile function and colour doppler ultrasound (CDUS) findings after treatment for NiP. Unstimulated CDUS was performed at diagnosis, 1 week and at last follow-up after treatment. CDUS traces were analysed: peak systolic velocity (PSV), end diastolic velocity (EDV), resistive index (RI) and mean velocity (MV) were calculated...

BACKGROUND AND AIM: It is feared that among chronic kidney disease patients undergoing hemodialysis, arteriovenous fistula (AVF) itself could contribute to pulmonary hypertension (PH). The impact of AVF location on PH is yet to be assessed. We hypothesize that patients with proximal AVF have higher access blood flow and hence higher pulmonary arterial systolic pressure (PASP) than those with distal AVF. We aimed to compare the PASP between patients with proximal and distal AVF. METHODS: In this cross-sectional study, PASP was estimated using Doppler echocardiography and blood flow in the AVF was assessed by Doppler ultrasound...

INTRODUCTION: Various methods for vascular access (VA) management have been studied. We investigated the usefulness a new, simple, and quantitative VA management method using the Pocket LDF® laser blood flowmeter (hereinafter "LDF") that non-invasively measures peripheral circulation flow. METHODS: Peripheral circulation flow was measured in 82 patients (43 men) on maintenance hemodialysis with an arteriovenous fistula (AVF). The shunt symmetry index (SSI) was calculated as peripheral circulation flow in the AVF limb divided by that in the non-AVF limb...

BACKGROUND: Arteriovenous fistula (AVF) postoperative stenosis is a persistent healthcare problem for hemodialysis patients. We have previously demonstrated that fibrotic remodeling contributes to AVF non-maturation and lysyl oxidase (LOX) is upregulated in failed AVFs compared to matured. Herein, we developed a nanofiber scaffold for the periadventitial delivery of β-aminopropionitrile (BAPN) to determine whether unidirectional periadventitial LOX inhibition is a suitable strategy to promote adaptive AVF remodeling in a rat model of AVF remodeling...

Arteriovenous fistulas (AVFs) and grafts (AVGs) are the preferred forms of vascular access for hemodialysis in patients with severe renal dysfunction. Multimodality imaging plays an important role in the pre-procedural evaluation of these patients. Ultrasound is often used for pre-procedural vascular mapping in preparation for the creation of an AVF or AVG. Pre-procedural mapping includes a comprehensive evaluation of the arterial and venous vasculature including evaluation of vessel diameter, stenosis, course, presence of collateral veins, wall thickness and wall abnormalities...

INTRODUCTION: The most common reason for constructing an arteriovenous fistula (AVF) is chronic kidney disease. Various factors are associated with nonmaturation or failure of AVF, which can be evaluated using color Doppler/duplex ultrasound (DUS). We carried out this study to evaluate the role of pre- and postoperative DUS for the prediction of outcomes of wrist radiocephalic (RC) AVF. METHODS: In our prospective observational study, dialysis-dependent patients between 20 and 70 years of age undergoing primary RC-AVF from May 2019 to July 2020 were included...

Aorto-pulmonary venous fistula combined with pulmonary arteriovenous fistula is a rare condition with an unknown incidence. We experienced a case of descending aorto-pulmonary venous fistula combined with a pulmonary arteriovenous fistula, which was treated with pulmonary arteriovenous fistula embolization and improved.

OBJECTIVE: Autogenous arteriovenous fistula (AVF) is recommended as the first choice for hemodialysis vascular access. A small-caliber vein is one of the independent risk factors for AVF maturation and patency. However, the specific threshold is still unclear, making it difficult to accurately determine whether these vessels are suitable for AVF creation. DESIGN: This is a single-center retrospective study. METHOD: Patients who underwent AVF creation in our medical center between January 2020 and September 2022 and satisfied the eligibility criteria were included in this retrospective study...

Arteriovenous fistula (AVF) is the preferred route for vascular access in patients with chronic kidney disease on maintenance haemodialysis. Many studies have demonstrated the positive effects of perioperative hand exercise on fistula maturation. Here, we present our experience of radio cephalic AVF creation in patients with neuromuscular disorders who had difficulty performing isometric hand exercises. We created AVF in three patients with neurological disorders. First patient had essential tremor, which created difficulty during hand exercises and surgery while the other two patients had right hemiparesis...

The incidence of radial artery cannulation resulting in the concurrent development of a pseudoaneurysm and an arteriovenous fistula is not well defined. Here, we present the case of a 42-year-old man who developed an iatrogenic pseudoaneurysm (PSA) and a concurrent arteriovenous fistula (AVF) following multiple right radial artery cannulations. Access was obtained for a preoperative diagnostic cardiac catheterization and again for hemodynamic monitoring intraoperatively during a surgical aortic valve replacement...

INTRODUCTION: The high rate of arteriovenous fistula maturation failure is a concern in a scenario of growing numbers of patients on hemodialysis. Non-vascular factors tied to maturation success have not been fully discussed. METHODS: This prospective observational cohort study included patients with CKD on dialysis or pre-dialysis prescribed arteriovenous fistula creation for the first time in an ambulatory surgical center in Joinville, Brazil, from January 2021 to July 2021...

OBJECTIVE: To evaluate the association between brachial artery blood velocity by color Doppler flow imaging (CDFI) and primary maturation of radio-cephalic autologous arteriovenous fistula (RC-AVF). METHODS: Clinical data from patients who underwent end-to-side cephalic-radial anastomosis were collected from December 2015 to December 2020. The anastomosis diameter (mm), blood velocity (cm/s), and brachial artery diameters (mm) 7 cm proximal to the elbow pre- and postoperation were measured by GE LOGIC-E9 ultrasound...

BACKGROUND: Intracranial dural arteriovenous fistulas (dAVFs) are pathological anastomoses between meningeal arteries and dural venous sinuses or cortical veins. Diagnosis of dAVFs can be challenging due to their broad range of clinical manifestations and the lack of specificity in their symptoms. We present a rare case of a patient with bilateral dAVFs, who was referred to our department for carotid doppler ultrasonography/transcranial color Doppler. CASE REPORT: A 67-year-old man was referred by his treating physician for neurovascular ultrasonography due to vision impairment associated with papilledema of both eyes...

BACKGROUND: The determination of blood flow rate (BFR) is a useful tool for assessing the function of arteriovenous fistula (AVF). METHODS: Eighty patients with a newly created radio cephalic AVF were analyzed. Hemodynamics and morphological characteristics of the blood vessels were assessed by Doppler ultrasound. RESULTS: The mean age of patients was 59.9 ± 13.5 years. A successful rate of AVF maturation was 62.5% at 8 weeks...

PURPOSE: International guidelines recommend screening for arteriovenous fistula (AVF) stenosis using various non-invasive methods. We evaluate different non-invasive AVF flow measurements for detecting AVF stenosis. METHODS: Twenty-three haemodialysis patients with suspected AVF stenosis are enrolled based on abnormal physical signs or high venous pressure during dialysis. Ultrasound dilution, urea dilution, Doppler ultrasonography, and fistulography are performed on all patients...

Background: Compared with traditional trans-radial artery access (TRA), there are limited data that can confirm the efficacy and safety of a 7F thin-walled sheath placed via distal TRA (dTRA) for percutaneous coronary intervention (PCI). Objective: This study aims to analyze the safety and efficacy of the placement of a 7F thin-walled sheath via dTRA for PCI. Methods: This was a single-center retrospective observational study in which 102 patients who received complex PCIs with a 7F thin-walled sheath placed via dTRA in the catheter room of our hospital from May 2020 to October 2021 were included...

We present venous valve stenosis, which is an uncommon cause of arteriovenous fistula (AVF) dysfunction. Owing to the thin structure in echography, venous valves are challenging to observe; however, we have found that the aliasing phenomenon is useful for diagnosing venous valve stenosis.

Pseudoaneurysm is a well-recognized complication seen in arteriovenous fistula (AVF) which usually involves the venous segments. Ultrasound-guided manual compression (UGMC) is a non-invasive and effective treatment for the management of pseudoaneurysms involving the venous segment. Pseudoaneurysm of the arterial segment of AVF is rare complication which usually needs surgical intervention. We report the first successful treatment case of a brachial artery pseudoaneurysm in a brachiobasilic arteriovenous fistula using ultrasound-guided manual compression...