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Venous graft stents

Kenneth Abreo, Adrian Sequeira
Stents are ubiquitously utilized in coronary and peripheral arterial disease. Interventional nephrologists, however, place stents in the venous outflow of the arteriovenous access. Stenosis is the predominant pathology that causes access dysfunction and will ultimately lead to thrombosis if uncorrected. Angioplasty and stent deployment are the current techniques available to combat stenosis. From initial bare metal stainless steel stents, the current generations of stents used are predominately covered nitinol stents...
March 1, 2018: Journal of Vascular Access
Alexis Galloux, Erika Pace, Stephanie Franchi-Abella, Sophie Branchereau, Emmanuel Gonzales, Daniele Pariente
BACKGROUND: Hepatic venous outflow obstruction after paediatric liver transplantation is an unusual but critical complication. OBJECTIVES: To review the incidence, diagnosis and therapeutic modalities of hepatic venous outflow obstruction from a large national liver transplant unit. MATERIALS AND METHODS: During the period from October 1992 to March 2016, 917 liver transplant procedures were performed with all types of grafts in 792 children...
February 21, 2018: Pediatric Radiology
Udit Bhaskar Bhatnagar, Josh Rezkalla, Tomasz Stys, Adam Stys
Drug eluting stents (DES) have been increasingly being used for treatment of coronary artery disease (CAD) and have been shown to be very effective in prevention of primary in-stent restenosis (ISR). However DES have been increasingly associated with acute to subacute risk of stent fractures (SF). There is also a paucity of data about different management strategies for SF, especially in the long term. We present a case of recurrent ISR in an area of previous acute SF at the touchdown of saphenous venous graft (SVG) to first diagonal artery (D1)...
January 2018: South Dakota Medicine: the Journal of the South Dakota State Medical Association
Soo Buem Cho, Ho Cheol Choi, EunJin Bae, Tae Jin Park, Hye Jin Baek, Sung Eun Park, Kyeong Hwa Ryu, Jin Il Moon, Bo Hwa Choi, Kyungsoo Bae, Kyung Nyeo Jeon
RATIONALE: Thrombosis due to anastomotic site stenosis is the most common complication in patients with brachio-axillary arteriovenous graft (AVG). Intravascular stent placement may play a special role in the salvage of dialysis grafts that have been previously performed percutaneous angioplasty or surgical procedure on the graft. Herein, we applied a novel stent named Supera which has a high degree of flexibility and resistance to external compression for treating a patient with recurrent venous anastomotic stenosis of brachio-axillary AVG...
December 2017: Medicine (Baltimore)
Deniz Balci, Menekse Ozcelik, Elvan Onur Kirimker, Arda Cetinkaya, Evren Ustuner, Mehmet Cakici, Bahadir Inan, Zekeriyya Alanoglu, Sadik Bilgic, Ahmet Ruchan Akar
BACKGROUND: Liver resection for intrahepatic cholangiocarcinoma (ICC) with invasion of the inferior vena cava (IVC) and hepatic veins (HV) is a challenging procedure. CASE PRESENTATION: We report a case of a 63-year-old woman with a 6-cm, centrally located liver mass. Her biochemistry results were normal except for a Ca19-9 level of 1199 U/ml. The liver biopsy was consistent with ICC and 60% macrosteatosis. Abdominal CT scans revealed a large central mass invading the left HV, middle HV and right HV, infringing on their junction with the vena cava...
January 31, 2018: BMC Surgery
Jana Janeckova, Petr Bachleda, Petr Utikal, Martin Köcher, Marie Cerna, Pavel Xinopulos
BACKGROUND: There is no unanimous strategy for treating stenosis of the venous anastomosis (VA) of an occluded arteriovenous graft (AVG) following surgical thrombectomy. In this study, we compared classical surgical treatment and endovascular treatment procedures with the use of stent- graft in a single center study. The aim was to evaluate whether, the VA stenosis of thrombosed AVG treated endovascularly by stent-graft implantation, have as good results as surgical VA treatment, so that it may be considered the method of choice...
January 26, 2018: International Angiology: a Journal of the International Union of Angiology
Sanaz Amin, Raphael S Werner, Per Lav Madsen, George Krasopoulos, David P Taggart
OBJECTIVES: Long-term patency of saphenous vein grafts (SVGs) remains a concern after coronary artery bypass grafting. Interventions to overcome this problem include monitoring intraoperative flow profile and, more recently, external stenting of SVGs. It is not known to what extent external stenting changes the perioperative flow characteristics of SVGs. The aim of this study was to assess whether the presence of an external stent affects perioperative graft flow parameters as evaluated by transit time flowmetry...
January 24, 2018: Interactive Cardiovascular and Thoracic Surgery
Premal S Trivedi, Kimberly E Lind, Charles E Ray, Paul J Rochon, Robert K Ryu
PURPOSE: To determine whether utilization and outcomes of dialysis access maintenance interventions vary by patient race or sex. MATERIALS AND METHODS: Data for this retrospective cohort study of first-time arteriovenous (AV) access recipients were drawn from a 5% sample of Medicare beneficiaries, containing claims from all clinical settings (2009-2014) in 2,693 patients who received their first AV fistula/graft in 2009. Maintenance interventions-angiography, angioplasty, thrombolysis, stent placement, and venous embolization-were identified by corresponding Current Procedural Terminology codes...
January 17, 2018: Journal of Vascular and Interventional Radiology: JVIR
Jeffrey Forris Beecham Chick, Minhaj S Khaja, Steven Han, Kyle J Cooper, J Matthew Meadows, David M Williams
Iliac venous aneurysms are rare vascular abnormalities that may be manifested by abdominal masses, pelvic tenderness, or hypovolemia and may lead to rupture, thrombosis, pulmonary embolism, paradoxical embolism, or death. Inferior vena cava agenesis, like venous aneurysm, is an uncommon condition that may present with deep venous thrombosis. This report describes a patient with inferior vena cava agenesis and iliac venous aneurysm rupture treated with emergent iliocaval reconstruction and endovascular stent graft placement...
September 2017: Journal of Vascular Surgery Cases and Innovative Techniques
Dainis Krievins, Janis Savlovskis, Natalija Ezite, Andrew Hill, Kaspars Kisis, Marcis Gedins, Edgars Zellans, Andrew Holden
BACKGROUND: Long segment occlusive disease in the superficial femoral artery remains a treatment challenge despite advances in open surgical and endovascular approaches. We report initial clinical results of an entirely new procedure to perform femoropopliteal bypass using the DETOUR System to create a stentgraft bypass which originates in the SFA, travels through the femoral vein, and ends in the popliteal artery, bypassing the diseased segment. METHODS: Review the initial results of the first five patients at a single site enrolled in IRB-approved, prospective clinical study using the DETOUR System...
January 9, 2018: Journal of Cardiovascular Surgery
George N Kouvelos, Konstantinos Spanos, George A Antoniou, Ioannis Vassilopoulos, Christos Karathanos, Miltiadis I Matsagkas, Athanasios D Giannoukas
PURPOSE: To assess the outcomes of plain balloon angioplasty versus stenting for the treatment of failed or malfunctioning chronic haemodialysis arteriovenous grafts (AVGs). METHODS: A systematic search of the literature was undertaken using the PUBMED, EMBASE, and Cochrane databases from January 2000 to September 2016 for articles comparing balloon angioplasty versus stenting in the management of failed or malfunctioning chronic haemodialysis AVGs. Results are reported as OR and 95% CI...
December 16, 2017: European Journal of Vascular and Endovascular Surgery
Jamie A Mawhinney, Craig A Mounsey, David P Taggart
Despite the apparent superiority of arterial conduits for coronary artery bypass grafting (CABG), the long saphenous vein remains the most commonly used graft. The high failure rate of long saphenous vein grafts (SVGs) over time is therefore an important limiting factor for the long-term outcomes of CABG. Various methods to improve SVG patency have been proposed, although few have had a significant impact on clinical practice. External SVG supports have been a focus of research over the past 50 years, with their use intended to minimize well-documented pathophysiological changes that occur in the SVG following implantation into the coronary circulation...
December 8, 2017: European Journal of Cardio-thoracic Surgery
Tarek Abdelazeem Sabra, Hideaki Okajima, Tetsuya Tajima, Ken Fukumitsu, Koichiro Hata, Kentaro Yasuchika, Toshihiko Masui, Kojiro Taura, Toshimi Kaido, Shinji Uemoto
INTRODUCTION: Suprahepatic caval resection and replacement of inferior vena cava (IVC) is standard procedure in deceased donor liver transplantation for patients with Budd-Chiari syndrome (BCS). However, replacement of IVC in living donor liver transplantation (LDLT) is difficult. We report a case of BCS successfully treated by LDLT without replacement of IVC. PRESENTATION OF CASE: A 52-years-old female with a primary BCS due to IVC thrombosis. A vena cava (VC) stent placed after angioplasty without improvement of the hepatic, portal venous flow and liver functions, Transjugular intrahepatic portosystemic shunt was considered and the patient had a rapid deterioration and increased ascites...
2018: International Journal of Surgery Case Reports
Suleyman Koc, Sami Akbulut, Vural Soyer, Mehmet Yilmaz, Bora Barut, Ramazan Kutlu, Sezai Yilmaz
OBJECTIVES: In this study, we share our approach for care of patients with hepatic venous outlet obstruction after living-donor liver transplant. MATERIALS AND METHODS: We retrospectively examined the demographic, clinical, and radiologic data of 35 patients who developed hepatic venous outlet obstruction after living-donor liver transplant. Patients were subgrouped on the basis of onset (8 patients with early onset [< 30 days posttransplant] and 27 patients with late onset [≥ 30 days posttransplant]) and postoperative survival (24 survivors, 11 nonsurvivors)...
December 5, 2017: Experimental and Clinical Transplantation
Jia-Wu Li, Qiang Lu, Yan Luo
Hepatic vein stenosis after liver transplantation is a relatively rare complication that could even result in graft loss. However, it is difficult to arrive at a definite diagnosis at the early stage of postoperation, and there are few researches on ultrasonic shear wave elastography in the diagnosis of hepatic vein stenosis. We report the case of an 11-year-old male patient with cirrhosis due to hepatolenticular degeneration who received an auxiliary left hemiliver graft from his uncle. Massive ascites developed in 4 days after the operation...
December 2017: Ultrasound Quarterly
Alberto Barioli, Massimo Napodano, Giuseppe Tarantini
Newer generation of self-expandable nitinol coronary stents has proven to be useful in the treatment of bifurcations, tapered vessels, thrombotic lesions, venous grafts and ectatic segments. However, optimal device positioning can be cumbersome, due to the peculiar delivery mechanism which consists of retracting an outer sheath in order to release the stent from the distal edge. We report the case of a 53-year-old man, admitted for unstable angina. Coronary angiography showed a tight stenosis of the proximal left anterior descending coronary artery...
December 2017: Giornale Italiano di Cardiologia
Riccardo Corti, Pietro Quaretti, Franco Galli, Lorenzo Paolo Moramarco, Nicola Cionfoli, Giovanni Leati, Riccardo Corbetta, Matteo Tozzi
A tailored therapy to patient requirements by combining endovascular and surgical steps can be necessary to prolong the life of a vascular access. Stent grafts play a growing role for the therapy of dialytic access complications. Randomized multi-center trials, however, support the on-label use of stent grafts in the treatment of graft venous outflow and in-stent restenosis. The main contraindication to their use is an ongoing infection. We report two cases of new off-label application of Viabahn (Gore, flagstaff, USA) stent graft...
2017: SAGE Open Medical Case Reports
Enrico Ascher, Jacob E Mandel, Natalie A Marks, Anil P Hingorani
Background Dialysis access-associated steal syndrome is a major complication of arteriovenous fistula creation whereby the low-resistance venous conduit shunts arterial inflow through the anastomosis, resulting in clinically significant distal artery insufficiency. Herein, we describe a case of severe steal phenomenon with gangrene of a digit following placement of an arteriovenous fistula that was treated with a novel, entirely endovascular technique. To our knowledge, this was the first totally endovascular approach to dialysis access-associated steal syndrome...
January 1, 2017: Vascular
Menfil Orellana-Barrios, Nachiket Patel, Aliakbar Arvandi, Ralph Paone, Dixon Santana
Venous stents (VS) are used to treat central and peripheral stenoses. Stent embolization into a cardiac chamber is a rare, yet serious complication. We present a case of a 61-year-old man with a recently stented arteriovenous graft venous stenosis who developed VS migration into the right ventricle, associated with S. aureus bacteremia.
August 19, 2017: Curēus
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
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