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vascular prosthesis

John-Peder Escobar Kvitting, Odd R Geiran
In 1977, Karl Viktor Hall implanted a novel tilting disc heart valve prosthesis at Rikshospitalet in Oslo, Norway. The Medtronic-Hall valve was known for its excellent durability and low thrombogenicity. Hall popularized the use of the great saphenous vein in situ as an arterial shunt in the 1960s, made a metal stripper to lyse vein valves, and introduced electromagnetic flowmeters in vascular surgery. He performed the first coronary artery bypass graft in Scandinavia in 1969. Under his leadership the first heart transplantation and the first heart-lung transplantation were performed in Scandinavia by his successor Tor Frøysaker in 1983 and 1986, respectively...
November 2016: Annals of Thoracic Surgery
O T A Lyons, M Baguneid, T D Barwick, R E Bell, N Foster, S Homer-Vanniasinkam, S Hopkins, A Hussain, K Katsanos, B Modarai, J A T Sandoe, S Thomas, N M Price
OBJECTIVE/BACKGROUND: The management of aortic graft infection (AGI) is highly complex and in the absence of a universally accepted case definition and evidence-based guidelines, clinical approaches and outcomes vary widely. The objective was to define precise criteria for diagnosing AGI. METHODS: A process of expert review and consensus, involving formal collaboration between vascular surgeons, infection specialists, and radiologists from several English National Health Service hospital Trusts with large vascular services (Management of Aortic Graft Infection Collaboration [MAGIC]), produced the definition...
October 19, 2016: European Journal of Vascular and Endovascular Surgery
Landon W Trost, Ricardo Munarriz, Run Wang, Allen Morey, Laurence Levine
INTRODUCTION: The field of sexual medicine is continuously advancing, with novel outcomes reported on a regular basis. Given the rapid evolution, updated guidelines are essential to inform practicing clinicians on best practices. AIM: To summarize the current literature and provide clinical guidelines on penile traction therapy, vacuum erection devices, and penile revascularization. METHODS: A consensus panel was held with leading sexual medicine experts during the 2015 International Consultation on Sexual Medicine (ICSM)...
November 2016: Journal of Sexual Medicine
Madathipat Unnikrishnan, Sidharth Viswanathan, K Balasubramaniam, C V Muraleedharan, Arthur Vijayan Lal, P V Mohanan, Meera Mohanty, Tirur Raman Kapilamoorthy
BACKGROUND & OBJECTIVES: Vascular illnesses are on the rise in India, due to increase in lifestyle diseases and demographic transition, requiring intervention to save life, organ or limbs using vascular prosthesis. The aim of this study was to develop indigenous large diameter vascular graft for treatment of patients with vascular pathologies. METHODS: The South India Textile Research Association, at Coimbatore, Tamil Nadu, India, developed seamless woven polyester (Polyethylene terephthalate) graft at its research wing...
June 2016: Indian Journal of Medical Research
Bissacco Daniele, Domanin Maurizio, Del Gobbo Alessandro, Gabrielli Livio
Perigraft seroma is a rare complication occurs after placement of any vascular graft. It is defined as the collection of a sterile, clear and acellular liquid around prosthesis. It can appear years after surgery as a soft, palpable and painless mass. We present a perigraft seroma occurred in a 75-years-patient underwent Dacron right axillo-bifemoral bypass for Leriche's syndrome. Ultrasound and computed tomography scan revealed involvement of graft left branch and bifurcation. Although several treatment options have been proposed, removal and replacement of prosthetic affected tract with another of a different material has been proved the choice with best result...
2016: Annals of Vascular Diseases
Emilio Trignano, Nefer Fallico, Gino Zingone, Luca Andrea Dessy, Gian Vittorio Campus
Background Microsurgery is very challenging, requiring a high degree of dexterity and manual skills that should be fully trained outside of the operating room. Common microsurgery courses usually follow a stepwise training approach beginning practice on nonliving models and proceeding with live rats. However, training on live rats raises certain issues, including ethical concerns as well as the associated costs. As such, there is an increasing drive toward alternative models. The current article describes a three-step training approach (latex glove-endovascular prosthesis-human placenta), which aims to prepare trainees for the clinical direct application...
October 12, 2016: Journal of Reconstructive Microsurgery
Chih-Shin Lin, Yung-Song Lin, Bor-Shyh Lin, Ching-Feng Lien, Ching-Feng Liu
Arteriovenous malformation (AVM) is a structural vascular abnormality in which the arterial vasculature connects with the venous vasculature without capillary connections. AVM confined to the nasal cavity is considerably rare. Blurred vision can be one of the associated symptoms. A combined approach of complete surgical resection with prior superselective embolization is the treatment of choice. Following resection, the reconstruction of facial defects, particularly in the nasal area, is challenging. The present study reports the rare case of a patient with an AVM in the nasal cavity, in which embolization, resection and flap reconstruction were performed...
October 2016: Oncology Letters
Paul Neuville, Nicolas Morel-Journel, Delphine Maucourt-Boulch, Alain Ruffion, Philippe Paparel, Jean-Etienne Terrier
INTRODUCTION: The creation of a neophallus is a complex surgery that must meet functional and esthetic requirements. It is a long and demanding surgical process whose final stage consists of the implantation of a rigid or inflatable material that can be used to reproduce an erection. Data in the literature are scarce, with only the pioneering series present, which includes the use of the first devices and techniques. AIM: To report the outcome of patients with phalloplasty after implantation of erectile implants using standardized surgical techniques and the use of recent prosthesis types with or without a vascular graft...
September 29, 2016: Journal of Sexual Medicine
Lluis Guirao Cano
OBJECTIVE: Following a transfemoral (TF) amputation, the ability to walk with a prosthesis is the main objective of rehabilitation. The achieved speed of walking is considered a determining factor in the amputee's perception of quality of life. This experimental before-after study evaluates the walking abilities and improvement of important parameters such as gait, walking speed, pain and hours of prosthesis use in transfemoral amputees after placing a novel femoral implant that permits distal weight bearing of the residuum within a socket, adapted for distal load bearing...
September 2016: Annals of Physical and Rehabilitation Medicine
Chloé Blum, Solange Ehrler, Marie-Eve Isner
OBJECTIVE: Therapeutic patient education (TPE) is a continuous process for chronic disease. TPE enables patients to improve and acquire the skills that are necessary for self-care and self-management. We wanted to determine the place of self-care in patients following lower limb amputation by evaluating prosthetic and limb management and prosthesis use. MATERIAL/PATIENTS AND METHODS: To this aim, we involved 135 trans-tibial amputees between May 2011 and December 2013 who were fitted with contact silicone socket prosthesis with distal lock...
September 2016: Annals of Physical and Rehabilitation Medicine
Gilberto Melnick, Enio Eduardo Guerios, Guilherme Agreli
Transcatheter aortic valve implantation (TAVI) is a relatively new medical intervention. Research on dedicated TAVI devices is an exciting and dynamic field to be explored by professionals involved in technological innovation. The authors describe in this article the first engineering concept and part of the US Patent of a new valve prosthesis. Divided into two pieces to be separately implanted using a single catheter by means of an innovative technique, this device aims at reducing prosthesis and delivery catheter profile...
September 23, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Nuno Alexandre, Irina Amorim, Ana Rita Caseiro, Tiago Pereira, Rui Alvites, Alexandra Rêma, Ana Gonçalves, Guilherme Valadares, Elísio Costa, Alice Santos-Silva, Miguel Rodrigues, Maria Ascensão Lopes, André Almeida, José Domingos Santos, Ana Colette Maurício, Ana Lúcia Luís
The functional and structural performance of a 5cm synthetic small diameter vascular graft (SDVG) produced by the copolymerization of polyvinyl alcohol hydrogel with low molecular weight dextran (PVA/Dx graft) associated to mesenchymal stem cells (MSCs)-based therapies and anticoagulant treatment with heparin, clopidogrel and warfarin was tested using the ovine model during the healing period of 24 weeks. The results were compared to the ones obtained with standard expanded polyetetrafluoroethylene grafts (ePTFE graft)...
September 14, 2016: International Journal of Pharmaceutics
V A Batrashov, É N Manafov
A native arteriovenous fistula is the most preferred type of a permanent vascular access (PVA) amongst the patients on programmed haemodialysis. Complications of vascular accesses leading to their lost with time would eventually and unavoidably result in exhaustion of the vascular recourses of the patient thus creating posing a problem while forming yet another PVA. Taking into consideration vitally important necessity of carrying out haemodialysis procedures for these patients, vascular surgeons have to search for alternative variants of access to the vascular bed...
2016: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
Jacek Bil, Robert J Gil
Bioresorbable vascular scaffolds (BVS) have emerged as an interesting alternative since the presence of the prosthesis in the coronary artery is transient. This technology enables to restore the normal vasomotor tone and allows positive remodeling, simultaneously reducing the trigger for persistent inflammation and facilitating further interventions by percutaneous or surgical means. Absorb BVS(®) is the first generation everolimus-eluting poly-L-lactide (PLLA) bioresorbable scaffold. In recent meta-analyses Absorb BVS(®) was definitely proved to be safe and effective device in the treatment of symptomatic coronary artery disease...
August 2016: Journal of Thoracic Disease
E Minga Lowampa, Ch Holemans, L Stiennon, H Van Damme, J O Defraigne
OBJECTIVE: Initial enthusiasm for use of cryopreserved arterial allografts was subsequently tempered by suboptimal long-term outcome. Thrombosis, anastomotic pseudo-aneurysm, allograft disruption, aneurysmal degeneration, recurrent intestinal fistulization, and persistent infection are commonly reported in series with long-term follow-up. The authors reviewed their experience over the past 15 years with the use of cryopreserved arterial allografts as a vascular substitute for vascular prosthetic infection or for primary arterial infection, to investigate allograft-related complications...
September 7, 2016: European Journal of Vascular and Endovascular Surgery
Pv-H Botianu, R Chirtes, C Marcu, H Kosza, M Stoian, O Brusnic, Amv Botianu, A Dobre
We report a 60 years old patient who was admitted for a local recurrence after a right nephrectomy performed 2 years ago (papillary renal carcinoma with areas of sarcomatoid differentiation - pT3a). CT scan showed a retroperitoneal mass with invasion of the inferior vena cava. We performed a complete en-bloque excision of the tumor with the infrarenal portion of the inferior vena cava and lympha-denectomy. The vascular reconstruction was performed by the interposition of a 20 mm diameter Dacron prosthesis. The postoperative course was complicated due to an episode of digestive bleeding (duodenal ulcer) which stopped after conservative treatment (antisecretory and hemostatics, including rFVIIa), but eventually favourable...
July 2016: Chirurgia
Neal S Kleiman, Brijeshwar J Maini, Michael J Reardon, John Conte, Stanley Katz, Vivek Rajagopal, James Kauten, Alan Hartman, Raymond McKay, Robert Hagberg, Jian Huang, Jeffrey Popma
BACKGROUND: The risk for stroke after transcatheter aortic valve replacement (TAVR) is an important concern. Identification of predictors for stroke is likely to be a critical factor aiding patient selection and management as TAVR use becomes widespread. METHODS AND RESULTS: Patients enrolled in the CoreValve US Extreme Risk and High Risk Pivotal Trials or Continued Access Study treated with the self-expanding CoreValve bioprosthesis were included in this analysis...
September 2016: Circulation. Cardiovascular Interventions
Amir Basir, Paul Gründeman, Frans Moll, Joost van Herwaarden, Gerard Pasterkamp, Reindert Nijland
Various materials that are used for vascular and heart valve prostheses carry drawbacks: some require anticoagulant drugs or have moderate durability; others are not suitable for endovascular treatment. These prostheses are associated with bacterial infections. A material potentially suitable for prostheses is Dyneema Purity®, made of ultra-high-molecular-weight polyethylene. Dyneema Purity® fibers are very thin, flexible, resistant to fatigue and abrasion, and have high strength. S. aureus adherence to Dyneema Purity® was tested and compared with currently used cardiovascular prostheses...
2016: PloS One
Saúl Pampa-Saico, Sara Jiménez-Alvaro, Fernando Caravaca-Fontán, Ana Fernández-Rodríguez, Maite Rivera-Gorrín, Juan Sánchez, Antonio Chinchilla, Roberto Marcén
Aortobifemoral bypass (ABFB) thrombosis is not uncommon, and when the artery of a renal graft is implanted on a bypass the risk of graft loss is high. We report the case of a 48-year-old woman with a previous history of ABFB under antiplatelet therapy and a kidney allograft implanted on the vascular prosthesis, who presented with acute limb ischemia and severe renal impairment. Imaging techniques revealed a complete thrombosis of the proximal left arm of the ABFB. However, a faint retrograde flow over the graft was observed thanks to the recanalization of distal left bypass by collateral native arteries...
2016: Case Reports in Transplantation
Toshikuni Yamamoto, Shunei Saito, Akio Matsuura, Ken Miyahara, Haruki Takemura, Shinichi Mizutani, Masashi Toyama
Saphenous vein graft aneurysms are rare but are potentially fatal and their optimal management is not clearly established. Herein, we report a case of a saphenous vein graft aneurysm that was successfully treated with surgical intervention, including aneurysmal resection and re-grafting. The aneurysm, detected 36 years after coronary artery bypass grafting, was located at the proximal part of the saphenous vein graft to the posterolateral branch; the flow of the left anterior descending coronary artery was limited due to compression of the left internal thoracic artery by the adjacent aneurysm...
August 11, 2016: Heart, Lung & Circulation
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