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Fibrin sheath

Charalampos Sotiriadis, Steven David Hajdu, Francesco Doenz, Salah D Qanadli
Implanted venous access device (IVAD) late dysfunction is commonly caused by fibrin sheath formation. The standard method of endovascular fibrin sheath removal is performed via the femoral vein. However, it is not always technically feasible and sometimes contraindicated. Moreover, approximately 4-6 h of bed rest is necessary after the procedure. In this article, we describe an alternative method of fibrin sheath removal using the brachial vein approach in a young woman receiving chemotherapy for breast cancer...
2017: Frontiers in Surgery
Shokoufeh Hajsadeghi, Mahboubeh Pazoki, Alireza Azizahari, Aida Iranpour, Farzad Dashti
No abstract text is available yet for this article.
April 18, 2017: Journal of Vascular Access
Muhammad Adil Sheikh, Mohamed Shokr, Walid Ibrahim, Shaun Cardozo
Chronic indwelling central venous catheters can result in formation of fibrin sheaths increasing risk of occlusion, thrombosis and infection. Endovascular infection of right-sided heart structures induced by such sheaths is very rare. A 48-year-old woman with end-stage renal disease initially treated for diabetic ketoacidosis developed persistent Staphylococcus epidermidis bacteraemia without an identifiable source. Although transthoracic echocardiography was unremarkable, transoesophageal echocardiography revealed a fibrin sheath and vegetations in superior vena cava-right atrium junction, which was the site of the tip of a central catheter that had been removed 2 months prior, consistent with fibrin sheath-associated endovascular infection...
April 17, 2017: BMJ Case Reports
Thomas Haigh, John Raad Glore, David Gouldesbrough, Winson Wong
Schwannomas are benign nerve sheath tumours arising from Schwann cells. They comprise 1% of all benign tumours. In the 2016 World Health Organisation Classification of Central Nervous System, they are classified as a tumour of the cranial and paraspinal nerves, Schwannoma 9560/0. A 23-year-old Caucasian lady presented with a seven-month history of a painless right upper lip lump. Examination revealed a small cystic 0.5 cm diameter lesion within the right upper lip. The clinical impression was that of a mucocele...
2017: Case Reports in Otolaryngology
Chaudhry Adeel Ebad, Stephen Davitt, Ramal Gnanasekaran, Amjad Khan, Anne-Marie Moran
The term "stuck catheter" refers to situations where a central venous catheter cannot be removed from the central veins or right atrium using standard technique, usually due to development of a fibrin sheath leading to adherence to SVC or right atrial wall. Endoluminal dilatation is an interventional radiology technique that has been previously reported in the removal of stuck hemodialysis catheters, and to the best of our knowledge, this case describes the first application of the technique to remove a hemodialysis catheter that was adherent to SVC wall and transvenous pacemaker leads...
March 2017: Radiology case reports
De-Hua Chang, Kamal Mammadov, Tilman Hickethier, Jan Borggrefe, Martin Hellmich, David Maintz, Christoph Kabbasch
PURPOSE: Evaluation of the efficacy of single-shot, low-dose urokinase administration for the treatment of port catheter-associated fibrin sheaths. METHODS: Forty-six patients were retrospectively evaluated for 54 episodes of port catheter dysfunction. The presence of a fibrin sheath was detected by angiographic contrast examinations. On an outpatient basis, patients subsequently received thrombolysis consisting of a single injection of urokinase (15.000 IU in 1...
2017: Therapeutics and Clinical Risk Management
Esperanza Pato, Mª Auxiliadora Martin-Martinez, Adela Castelló, Rosalía Méndez-Fernandez, Santiago Muñoz-Fernández, Miguel Cordero-Coma, Lucia Martinez-Costa, Elia Valls, Miguel Reyes, Félix Francisco, Mar Esteban, Alex Fonollosa, Fernando Sanchez-Alonso, Cruz Fernández-Espartero, Teresa Diaz-Valle, José Miguel Carrasco, Emma Beltran-Catalán, Marisa Hernández-Garfella, María Victoria Hernández, Laura Pelegrin, Ricardo Blanco, David Diaz-Valle
To develop a disease activity index for patients with uveitis (UVEDAI) encompassing the relevant domains of disease activity considered important among experts in this field. The steps for designing UVEDAI were: (a) Defining the construct and establishing the domains through a formal judgment of experts, (b) A two-round Delphi study with a panel of 15 experts to determine the relevant items, (c) Selection of items: A logistic regression model was developed that set ocular inflammatory activity as the dependent variable...
April 2017: Rheumatology International
Luca Ferretto, Sandro Irsara
PURPOSE: To describe a sac embolization technique modification for type II endoleak prevention that makes a totally percutaneous approach feasible during endovascular aneurysm repair (EVAR) using the Excluder stent-graft. TECHNIQUE: Percutaneous access of the common femoral arteries is obtained and 2 suture-mediated closure systems are placed on each side. A 16-F or 18-F sheath is placed for delivery of the Excluder stent-graft main body and a 16-F sheath is used on the contralateral side...
February 2017: Journal of Endovascular Therapy
Myriam K S Ballo, Sami Rtimi, César Pulgarin, Nancy Hopf, Aurélie Berthet, John Kiwi, Philippe Moreillon, José M Entenza, Alain Bizzini
In this study, silver/copper (Ag/Cu)-coated catheters were investigated for their efficacy in preventing methicillin-resistant Staphylococcus aureus (MRSA) infection in vitro and in vivo Ag and Cu were sputtered (67/33% atomic ratio) on polyurethane catheters by direct-current magnetron sputtering. In vitro, Ag/Cu-coated and uncoated catheters were immersed in phosphate-buffered saline (PBS) or rat plasma and exposed to MRSA ATCC 43300 at 10(4) to 10(8) CFU/ml. In vivo, Ag/Cu-coated and uncoated catheters were placed in the jugular vein of rats...
September 2016: Antimicrobial Agents and Chemotherapy
Julie Le, Areg Grigorian, Samuel Chen, Isabella J Kuo, Roy M Fujitani, Nii-Kabu Kabutey
INTRODUCTION: Peripherally inserted central catheters (PICCs) are a popular alternative to central venous lines. PICCs can provide reliable long-term access for intravenous fluids, antibiotics and total parenteral nutrition. Multiple factors can contribute to difficult PICC removal including adherent fibrin and thrombus formation around the catheter. We discuss a novel endovascular retrieval technique to remove tightly adherent PICCs. CASE PRESENTATION: A 42-year-old male with history of chronic pancreatitis requiring intravenous pain medications, presented with right upper extremity single lumen PICC that could not be removed by standard techniques...
November 2, 2016: Journal of Vascular Access
Lili Ma, Chunfang Xia, Xin Sun, Yulan Zuo, Liping Zhao
OBJECTIVE: This study aimed to examine the influence of oral acetylsalicylic acid on blood fluidity and infusion speed in the cancer patients with Peripherally Inserted Central Catheter (PICC). BACKGROUND: PICC is placed for prolonged chemotherapy of cancer patients. The fibrin sheaths, which consist of cellular substance and non-cellular substance, generate at the place of insertion and grow down all over the catheter. Finally they cover the vent of the catheter and lead to catheter dysfunctions such as the decrease of infusion speed...
2017: Clinical Hemorheology and Microcirculation
Charalampos Sotiriadis, Steven David Hajdu, Sophie Degrauwe, Heloise Barras, Salah Dine Qanadli
With the increased use of implanted venous access devices (IVADs) for continuous long-term venous access, several techniques such as percutaneous endovascular fibrin sheath removal, have been described, to maintain catheter function. Most standard techniques do not capture the stripped fibrin sheath, which is subsequently released in the pulmonary circulation and may lead to symptomatic pulmonary embolism. The presented case describes an endovascular technique which includes stripping, capture, and removal of fibrin sheath using a novel filter device...
August 2016: Cardiovascular and Interventional Radiology
Maurizio Gallieni, Antonino Giordano, Umberto Rossi, Maurizio Cariati
Central venous catheters (CVCs) are essential in the management of hemodialysis patients, but they also carry unintended negative consequences and in particular thrombosis and infection, adversely affecting patient morbidity and mortality. This review will focus on the etiology, prevention, and management of CVC-related dysfunction, which is mainly associated with inadequate blood flow. CVC dysfunction is a major cause of inadequate depuration. Thrombus, intraluminal and extrinsic, as well as fibrous connective tissue sheath (traditionally indicated as fibrin sheath) formation play a central role in establishing CVC dysfunction...
March 2016: Journal of Vascular Access
Shaun Cardozo, Preeya Prakash, Tasneem Ahmed, Kevin Belgrave
No abstract text is available yet for this article.
January 28, 2016: Journal of Vascular Access
Matthias A Reichenberger, Wolf Mueller, Jennifer Hartmann, Yannick Diehm, Ulrike Lass, Eva Koellensperger, Uwe Leimer, Günter Germann, Sebastian Fischer
BACKGROUND: Due to their unique properties, adipose derived stem cells (ADSCs) obtain promising potential to enhance nerve regeneration. The aim of this study was to investigate if fibrin-glue embedded ADSCs were a beneficial adjunct to primary coaptation in a rat sciatic nerve model. MATERIALS AND METHODS: Fifty male Lewis rats underwent sciatic nerve transection and subsequent epineural suture repair. The treatment group received ADSCs re-suspended in fibrin glue, while the control group received fibrin glue only...
September 2016: Microsurgery
Jerzy Garcarek, Tomasz Gołębiowski, Krzysztof Letachowicz, Mariusz Kusztal, Maciej Szymczak, Katarzyna Madziarska, Katarzyna Jakuszko, Sławomir Zmonarski, Maciej Guziński, Wacław Weyde, Marian Klinger
Long-term hemodialysis catheter dwell time in the central vein predisposes to fibrin sheath development, which subsequently causes catheter malfunction or occlusion. In very rare cases, the catheter can be overgrown with fibrin and rigidly connected with the vein or heart structures. This makes its removal almost impossible and dangerous because of the possibility of serious complications, namely vein and heart wall perforation, bleeding, or catheter abruption in deep tissues. We describe two cases in which standard retrieval of long-term catheters was not possible...
May 2016: Artificial Organs
Shu Zhu, Bradley A Herbig, Ruizhi Li, Thomas V Colace, Ryan W Muthard, Keith B Neeves, Scott L Diamond
Microfluidic devices create precisely controlled reactive blood flows and typically involve: (i) validated anticoagulation/pharmacology protocols, (ii) defined reactive surfaces, (iii) defined flow-transport regimes, and (iv) optical imaging. An 8-channel device can be run at constant flow rate or constant pressure drop for blood perfusion over a patterned collagen, collagen/kaolin, or collagen/tissue factor (TF) to measure platelet, thrombin, and fibrin dynamics during clot growth. A membrane-flow device delivers a constant flux of platelet agonists or coagulation enzymes into flowing blood...
2015: Biorheology
Sushilkumar K Sonavane, Desmin M Milner, Satinder P Singh, Ahmed Kamel Abdel Aal, Kaushik S Shahir, Abhishek Chaturvedi
The superior vena cava (SVC) is the largest central systemic vein in the mediastinum. Imaging (ie, radiography, computed tomography [CT], magnetic resonance [MR] venography, and conventional venography) plays an important role in identifying congenital variants and pathologic conditions that affect the SVC. Knowledge of the basic embryology and anatomy of the SVC and techniques for CT, MR imaging, and conventional venography are pivotal to accurate diagnosis and clinical decision making. Congenital anomalies such as persistent left SVC, partial anomalous pulmonary venous return, and aneurysm are asymptomatic and may be discovered incidentally in patients undergoing imaging evaluation for associated cardiac abnormalities or other indications...
November 2015: Radiographics: a Review Publication of the Radiological Society of North America, Inc
J M Lasso, R Pérez Cano, Y Castro, L Arenas, J García, M E Fernández-Santos
UNLABELLED: Adipose tissue-derived mesenchymal stem cells (AdMSCs) are useful in the regeneration of neural tissues. Furthermore, xenotransplantation of human adipose tissue-derived mesenchymal stem cells (hAdMSCs) into animal models has already been tested and the results encouraged us to study peripheral nerve regeneration in rabbits, in order to test the feasibility of a xenotransplantation of hAdMSCs. ANIMALS AND METHOD: To promote end-to-end nerve fiber contacts of a 4-cm gap in the peroneal nerve of white New Zealand rabbits, an autologous vein conduit was used and three groups of animals were evaluated...
December 2015: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
Aryeh Keehn, Dan Rabinowitz, Steve K Williams, Benjamin H Taragin
We present a 6-year-old girl with acute lymphoblastic leukemia who demonstrated on chest X-ray a radiopacity in the superior vena cava after removal of an implanted venous access device. This radiopacity was initially thought to be a retained catheter fragment. On review of previous imaging, we were able to document the temporal development of a calcified catheter cast as distinct from the catheter. This case represents a rare consequence of central venous catheterization in children. Knowledge of this finding as a possible complication may help avoid performance of unnecessary follow-up imaging or invasive procedures...
November 2015: Clinical Imaging
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