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Expandable sheath or e-sheath

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https://www.readbyqxmd.com/read/28374279/design-analysis-and-testing-of-a-novel-mitral-valve-for-transcatheter-implantation
#1
Selim Bozkurt, Georgia L Preston-Maher, Ryo Torii, Gaetano Burriesci
Mitral regurgitation is a common mitral valve dysfunction which may lead to heart failure. Because of the rapid aging of the population, conventional surgical repair and replacement of the pathological valve are often unsuitable for about half of symptomatic patients, who are judged high-risk. Transcatheter valve implantation could represent an effective solution. However, currently available aortic valve devices are inapt for the mitral position. This paper presents the design, development and hydrodynamic assessment of a novel bi-leaflet mitral valve suitable for transcatheter implantation...
April 3, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28366701/altering-the-approach-open-minimally-invasive-renal-transplant-in-obese-patients-through-the-anterior-rectus-sheath
#2
Stephen H Phillips, Sharon K Hill, Lorie D Lipscomb, Joseph B Africa
OBJECTIVES: As the obese population has expanded, minimally invasive renal transplant techniques have attempted to improve the issues of complications related to wounds and hernias. The Anterior Rectus Sheath approach, which facilitates a minimal incision, has been adopted at our center for all renal transplants, including obese patients. Retrospectively, we analyzed the wound issues for obese patients as well as outcomes/graft survival, hypothesizing improvement over the standard approach...
March 30, 2017: Urology
https://www.readbyqxmd.com/read/28356202/role-of-tissue-expansion-in-abdominal-wall-reconstruction-a-systematic-evidence-based-review
#3
Kimberly E Wooten, Cemile Nurdan Ozturk, Can Ozturk, Peter Laub, Nell Aronoff, Raffi Gurunluoglu
BACKGROUND: Tissue expanders (TEs) can be used to assist primary closure of complicated hernias and large abdominal wall defects. However, there is no consensus regarding the optimal technique, use, or associated risk of TE in abdominal wall reconstruction. METHODS: A systematic search of PubMed and Embase databases was conducted to identify articles reporting abdominal wall reconstruction with TE techniques. English articles published between 1980 and 2016 were included on the basis of the following inclusion criteria: two-stage TE surgical technique, >3 cases, reporting of postoperative complications, hernia recurrence, and patient-based clinical data...
February 28, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28343765/human-cardiac-progenitor-cells-with-regenerative-potential-can-be-isolated-and-characterized-from-3d-electro-anatomic-guided-endomyocardial-biopsies
#4
Domenico D'Amario, Antonio Maria Leone, Maria Lucia Narducci, Costantino Smaldone, Dalgisio Lecis, Frediano Inzani, Marco Luciani, Andrea Siracusano, Federica La Neve, Melissa Manchi, Gemma Pelargonio, Francesco Perna, Piergiorgio Bruno, Massimo Massetti, Dario Pitocco, Donato Cappetta, Grazia Esposito, Konrad Urbanek, Antonella De Angelis, Francesco Rossi, Roberto Piacentini, Giulia Angelini, Domenica Donatella Li Puma, Claudio Grassi, Elisa De Paolis, Ettore Capoluongo, Valentina Silvestri, Biagio Merlino, Riccardo Marano, Filippo Crea
AIMS: In the present study, we aimed to develop a percutaneous approach and a reproducible methodology for the isolation and expansion of Cardiac Progenitor Cells (CPCs) from EndoMyocardial Biopsies (EMB) in vivo. Moreover, in an animal model of non-ischemic heart failure (HF), we would like to test whether CPCs obtained by this methodology may engraft the myocardium and differentiate. METHODS AND RESULTS: EMB were obtained using a preformed sheath and a disposable bioptome, advanced via right femoral vein in 12 healthy mini pigs, to the right ventricle...
March 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28342523/early-experience-with-a-modified-preloaded-system-for-fenestrated-endovascular-aortic-repair
#5
Blandine Maurel, Tim Resch, Rafaelle Spear, Blayne Roeder, Umberto M Bracale, Stephan Haulon, Tara M Mastracci
OBJECTIVE: Preloaded endovascular delivery systems expand the anatomic eligibility for complex aortic repair by requiring only one iliac access vessel and providing a stable platform for guiding sheaths into challenging target vessels. This article reports the lessons learned and early clinical outcomes using a modified preloaded delivery system for fenestrated endovascular aneurysm repair (FEVAR) in three aortic centers in Europe. METHODS: From October 2015 to March 2016, consecutive patients presenting with extensive aortic aneurysm treated with a modified preloaded FEVAR were prospectively enrolled from three high volume European aortic centers...
April 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28329078/apical-closure-device-for-full-percutaneous-transapical-valve-implantation-stress-test-in-an-animal-model%C3%A2
#6
Enrico Ferrari, Stefanos Demertzis, Jennifer Angelella, Denis Berdajs, Piergiorgio Tozzi, Tiziano Moccetti, Francesco Maisano, Ludwig K von Segesser
OBJECTIVES: Transapical valve implantation is traditionally performed through a left antero-lateral mini-thoracotomy. A self-expandable apical closure device has recently been developed for full-percutaneous transapical valve implantation. We performed haemodynamics stress-tests on an animal model to evaluate the sealing properties. METHODS: Under general anaesthesia 5 pigs (mean weight: 67 ± 6 Kg) received full heparinization (100 IU/Kg; activated clotting time >250 s and, through inferior mini-sternotomies, 21-Fr introducer sheaths for transapical aortic valve implantation (outer diameter: 25-Fr) were placed over-the-wire in the apexes...
January 31, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28301613/simple-microfluidic-formation-of-highly-heterogeneous-microfibers-using-a-combination-of-sheath-units
#7
D H Yoon, K Kobayashi, D Tanaka, T Sekiguchi, S Shoji
This paper presents the formation of complex cross-sectional microfibers using three-dimensional microfluidic devices. The compartments and shapes of core and shell layers in the microfibers were independently controlled via three-dimensional fluidic channels fabricated by the combination of sheath units. The number of layers is easily expanded by the stacking of these units. Therefore, the highly heterogeneous microfibers of alginate hydrogel are obtained in polydimethylsiloxane structures. This widely expandable method has great potential for the development of functional and complex fiber-shaped materials...
April 11, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28191777/enhanced-expansion-and-sustained-inductive-function-of-skin-derived-precursor-cells-in-computer-controlled-stirred-suspension-bioreactors
#8
Natacha A Agabalyan, Breanna S Borys, Holly D Sparks, Kathryn Boon, Eko W Raharjo, Sepideh Abbasi, Michael S Kallos, Jeff Biernaskie
Endogenous dermal stem cells (DSCs) reside in the adult hair follicle mesenchyme and can be isolated and grown in vitro as self-renewing colonies called skin-derived precursors (SKPs). Following transplantation into skin, SKPs can generate new dermis and reconstitute the dermal papilla and connective tissue sheath, suggesting they could have important therapeutic value for the treatment of skin disease (alopecia) or injury. Controlled cell culture processes must be developed to efficiently and safely generate sufficient stem cell numbers for clinical use...
February 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28188680/experimental-fossilization-of-mat-forming-cyanobacteria-in-coarse-grained-siliciclastic-sediments
#9
S A Newman, V Klepac-Ceraj, G Mariotti, S B Pruss, N Watson, T Bosak
Microbial fossils and textures are commonly preserved in Ediacaran and early Cambrian coarse-grained siliciclastic sediments that were deposited in tidal and intertidal marine settings. In contrast, the fossilization of micro-organisms in similar marine environments of post-Cambrian age is less frequently reported. Thus, temporal discrepancies in microbial preservation may have resulted from the opening and closing of a unique taphonomic window during the terminal Proterozoic and early Phanerozoic, respectively...
February 11, 2017: Geobiology
https://www.readbyqxmd.com/read/28118796/mechanical-recanalization-for-acute-embolic-occlusion-at-the-origin-of-the-superior-mesenteric-artery
#10
Yoichi Miura, Tomohiro Araki, Mio Terashima, Junya Tsuboi, Yasuhiro Saito, Kenji Kanamaru, Hidenori Suzuki
PURPOSE: We report a combined technique consisting of thrombectomy and thromboaspiration for the treatment of acute embolic occlusion of the superior mesenteric artery (SMA) at the origin. CASE: A 90-year-old female with chronic atrial fibrillation had a sudden onset of abdominal pain and hematochezia due to acute embolic occlusion at the origin of the SMA. Computed tomographic findings showed reversible bowel wall ischemia. We performed mechanical thrombectomy using the Solitaire FR revascularization device, a self-expanding and fully retrievable stent-based thrombectomy system for acute intracranial large artery occlusion, combined with manual aspiration through a 6F guiding sheath placed at the SMA origin via a right brachial approach...
February 2017: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28070593/-morphological-investigations-of-deep-sole-ulcers-in-cattle-part-1-the-complicated-rusterholz-ulcer
#11
Susanne Gehringer, Matthias Müller, Johann Maierl
OBJECTIVE: In the context of a larger study on morphological changes of deep sole ulcers, claws with Rusterholz ulcer (RU) were investigated to describe the varied pathological changes of the RU. MATERIAL AND METHODS: Hind limbs of 55 cows displaying external signs of complicated sole ulcers were examined externally and internally. To examine the samples internally, a sagittal section was performed. Furthermore, the material was examined histologically and after bone maceration...
February 9, 2017: Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere
https://www.readbyqxmd.com/read/27957603/structure-and-functioning-of-oil-cavities-in-the-shoot-apex-of-metrodorea-nigra-a-st-hil-rutaceae
#12
Silvia Rodrigues Machado, Yve Canaveze, Tatiane Maria Rodrigues
This study investigates the histology and subcellular features of secretory cavities during the development of the shoot apex of Metrodorea nigra A. St.-Hil. in order to better understand the functioning of these glands. This Rutaceae species is a very suitable model for studying secretory cavity life span, since the shoot apex exhibits both dormant and growth stages during its annual cycle. Shoot apices were collected during the dormant and growth stages from populations of M. nigra growing under natural conditions...
December 12, 2016: Protoplasma
https://www.readbyqxmd.com/read/27939382/incidence-predictors-and-mid-term-outcomes-of-percutaneous-closure-failure-after-transfemoral-aortic-valve-implantation-using-an-expandable-sheath-from-the-optimized-transcatheter-valvular-intervention-ocean-tavi-registry
#13
Yugo Nara, Yusuke Watanabe, Ken Kozuma, Akihisa Kataoka, Makoto Nakashima, Hirofumi Hioki, Hideyuki Kawashima, Fukuko Nagura, Shinichi Shirai, Norio Tada, Motoharu Araki, Toru Naganuma, Futoshi Yamanaka, Masanori Yamamoto, Kentaro Hayashida
The aim of this study was to evaluate the incidence, predictors, and outcomes of percutaneous closure device (PCD) failure during transfemoral transcatheter aortic valve implantation (TAVI) with an Edwards Sapien-XT prosthesis using an expandable sheath (eSheath). From October 2013 to April 2016, 1,215 patients who underwent TAVI were prospectively enrolled in the Optimized Transcatheter Valvular Intervention (OCEAN-TAVI) registry. Of these, 478 patients underwent transfemoral TAVI with Sapien-XT prosthesis using an eSheath and percutaneous closure with a Perclose ProGlide system...
November 16, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/27916741/design-and-principle-of-operation-of-the-heartmate-phptm-percutaneous-heart-pump
#14
N M Van Mieghem, Joost Daemen, Corstiaan den Uil, Onur Dur, Linda Joziasse, AnneMarie Maugenest, Keif Fitzgerald, Chris Parker, Paul Muller, Robert-Jan van Geuns
The HeartMate PHP (Percutaneous Heart Pump) is a second-generation transcatheter axial flow circulatory support system. The collapsible catheter pump is inserted through a 14F sheath, deployed across the aortic valve expanding to 24F and able to deliver up to 5L/min blood flow at minimum hemolytic risk. As such this device may be a valuable adjunct to percutaneous coronary intervention (PCI) of challenging lesions in high-risk patients or treatment of cardiogenic shock. This technical report discusses: (i) the HeartMate PHP concept, (ii) the implantation technique, (iii) the hemodynamic performance in an in vitro cardiovascular flow testing setup and (iv) preliminary clinical experience...
December 6, 2016: EuroIntervention
https://www.readbyqxmd.com/read/27882604/the-dog-bone-technique-a-novel-easy-and-safe-catheter-maneuver-for-aortic-arch-and-coarctation-stenting
#15
Marinos Kantzis, Anja Lehner, Kai Thorsten Laser, Anca Racolta, Radka Vcasna, Marcus Fischer, Deniz Kececioglu, Nikolaus A Haas
BACKGROUND: Various techniques are described to facilitate stable stent implantation in aortic arch stenosis or coarctation. We describe an alternative technique, which due to its unique appearance during stent implantation, we have named "Dog Bone Technique" (DBT). TECHNIQUE: The stent/balloon assembly is placed across the stenosis, the long sheath is retrieved to uncover the distal 20-50% of the stent. The balloon is inflated with the pressure inflator just to expand slightly the stent...
February 2017: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/27865711/use-of-an-eptfe-covered-nitinol-self-expanding-stent-graft-for-the-treatment-off-pre-closure-device-failure-during-transcatheter-aortic-valve-replacement
#16
Arie Steinvil, Nelson Bernardo, Toby Rogers, Edward Koifman, Kyle Buchanan, M Chadi Alraies, Christian Shults, Rebecca Torguson, Petros G Okubagzi, Augusto D Pichard, Lowell F Satler, Itsik Ben-Dor, Ron Waksman
OBJECTIVES: Our aim was to describe our experience with the use of an ePTFE-covered nitinol self-expanding stent graft (GORE® VIABAHN® Endoprosthesis, Gore Medical, USA) placed in the common femoral artery for the treatment of suture-mediated pre-closure device failure following transcatheter aortic valve replacement (TAVR). BACKGROUND: Access site-related vascular complications (VC) following sheath removal related to pre-closure device failure during TAVR are common and treatment options may vary...
March 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/27846318/a-long-gap-peripheral-nerve-injury-therapy-using-human-skeletal-muscle-derived-stem-cells-sk-scs-an-achievement-of-significant-morphological-numerical-and-functional-recovery
#17
Tetsuro Tamaki, Maki Hirata, Nobuyuki Nakajima, Kosuke Saito, Hiroyuki Hashimoto, Shuichi Soeda, Yoshiyasu Uchiyama, Masahiko Watanabe
Losses in vital functions of the somatic motor and sensory nervous system are induced by severe long-gap peripheral nerve transection injury. In such cases, autologous nerve grafts are the gold standard treatment, despite the unavoidable sacrifice of other healthy functions, whereas the prognosis is not always favorable. Here, we use human skeletal muscle-derived stem cells (Sk-SCs) to reconstitute the function after long nerve-gap injury. Muscles samples were obtained from the amputated legs from 9 patients following unforeseen accidents...
2016: PloS One
https://www.readbyqxmd.com/read/27792743/the-evolutionary-basis-of-naturally-diverse-rice-leaves-anatomy
#18
Jolly Chatterjee, Jacqueline Dionora, Abigail Elmido-Mabilangan, Samart Wanchana, Vivek Thakur, Anindya Bandyopadhyay, Darshan S Brar, William Paul Quick
Rice contains genetically and ecologically diverse wild and cultivated species that show a wide variation in plant and leaf architecture. A systematic characterization of leaf anatomy is essential in understanding the dynamics behind such diversity. Therefore, leaf anatomies of 24 Oryza species spanning 11 genetically diverse rice genomes were studied in both lateral and longitudinal directions and possible evolutionary trends were examined. A significant inter-species variation in mesophyll cells, bundle sheath cells, and vein structure was observed, suggesting precise genetic control over these major rice leaf anatomical traits...
2016: PloS One
https://www.readbyqxmd.com/read/27733689/clinical-results-and-mechanical-properties-of-the-carotid-cguard-double-layered-embolic-prevention-stent
#19
Christian Wissgott, Wolfram Schmidt, Christoph Brandt-Wunderlich, Peter Behrens, Reimer Andresen
PURPOSE: To report early clinical outcomes with a novel double-layer stent for the internal carotid artery (ICA) and the in vitro investigation of the stent's mechanical properties. METHODS: A prospective single-center study enrolled 30 consecutive patients (mean age 73.1±6.3 years; 21 men) with symptomatic (n=25) or high-grade (n=5) ICA stenosis treated with the new double-layer carotid CGUARD Embolic Prevention System (EPS) stent, which has an inner open-cell nitinol design with an outer closed-cell polyethylene terephthalate layer...
February 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/27639745/percutaneous-repair-of-the-tricuspid-valve-using-a-novel-cinching-device-acute-and-chronic-experience-in-a-preclinical-large-animal-model
#20
Maurizio Taramasso, Azeem Latib, Paolo Denti, Fabian Nietlispach, Kevin Lynn, Nikola Cesarovic, Alessandro Addis, Maximilian Y Emmert, Andrea Guidotti, Hugo Vanermen, Francesco Maisano
AIMS: The aim of this study was to evaluate the safety, technical feasibility and performance of a new trans-catheter tricuspid repair system. METHODS AND RESULTS: Thirty-one adult swine underwent implantation of a transcatheter tricuspid remodelling system under general anaesthesia. The steerable transcatheter device was introduced through a 24 Fr femoral sheath into the right femoral vein and delivered to the tricuspid annulus on the beating heart. A fixation element was implanted into the tricuspid annulus...
September 18, 2016: EuroIntervention
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