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large pore mesh

Akash Goyal, Francois T H Yu, Mathea G Tenwalde, Xucai Chen, Andrew Althouse, Flordeliza S Villanueva, John J Pacella
We have previously reported that long-tone-burst, high-mechanical-index ultrasound (US) and microbubble (MB) therapy can restore perfusion in both in vitro and in vivo models of microvascular obstruction (MVO). Addition of MBs to US has been found to potentiate the efficacy of thrombolytics on large venous thrombi; however, the optimal US parameters for achieving microvascular reperfusion of MVO caused by microthrombi, when combined with tissue plasminogen activator (tPA), are unknown. We sought to elucidate the specific effects of US, with and without tPA, for effective reperfusion of MVO in an in vitro model using both venous and arterial microthrombi...
April 7, 2017: Ultrasound in Medicine & Biology
Thomas M Schutzius, Christopher Walker, Tanmoy Maitra, Romy Schönherr, Christos Stamatopoulos, Stefan Jung, Carlo Antonini, Hadi Eghlidi, Julie L Fife, Alessandra Patera, Dominique Derome, Dimos Poulikakos
Separating petroleum hydrocarbons from water is an important problem to address in order to mitigate the disastrous effects of hydrocarbons on aquatic ecosystems. A rational approach to address the problem of marine oil-water separation is to disperse the oil with the aid of surfactants in order to minimize the formation of large slicks at the water surface and to maximize the oil-water interfacial area. Here we investigate the fundamental wetting and transport behavior of such surfactant-stabilized droplets and the flow conditions necessary to perform sieving and separation of these stabilized emulsions...
April 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
Andreas Gross, Afra Torge, Ulrich F Schaefer, Marc Schneider, Claus-Michael Lehr, Christian Wagner
Native horse mucus is characterized with micro- and macrorheology and compared to hydroxyethylcellulose (HEC) gel as a model. Both systems show comparable viscoelastic properties on the microscale and for the HEC the macrorheology is in good agreement with the microrheology. For the mucus, the viscoelastic moduli on the macroscale are several orders of magnitude larger than on the microscale. Large amplitude oscillatory shear experiments show that the mucus responds nonlinearly at much smaller deformations than HEC...
March 16, 2017: Journal of the Mechanical Behavior of Biomedical Materials
P Sreeda, A B Sathya, V Sivasubramanian
In the present study, self-forming dynamic membrane (SFDM) on rigid high-density polyethylene (HDPE) mesh with a large pore size of 2 mm is reported for the first time. The system was investigated for utilisation in simulated wastewater treatment by integrating the mesh with an aerobic bioreactor. The SFDM was analysed using Fourier transform infra-red (FT-IR) spectroscopy and visualised by scanning electron microscopy (SEM). The effect of the operating parameter on the change in composition of SFDM was also investigated...
February 28, 2017: Environmental Technology
D Weyhe
SURGICAL TECHNIQUES: In the HerniaSurge guidelines the highest evidence is found with respect to recommendations for mesh-based surgery techniques. This includes Lichtenstein as well as the minimally invasive TEP/TAPP surgery. For discreet symptomatic or asymptomatic inguinal hernia, watchful waiting is an option if the state of health and social situation are taken into account; however, femoral hernia should be treated promptly with a mesh technique, with laparoendoscopic techniques being the more favored option...
March 3, 2017: Der Chirurg; Zeitschrift Für Alle Gebiete der Operativen Medizen
Geraldine Hwee Ping Lee, Samuel Yew Ming Ho
Orbital blowout fractures are a common occurrence following orbital trauma. Depending on the size of the defect and the contents that have herniated or incarcerated, possible sequelae include enophthalmos, diplopia, dystopia, and entrapment. Surgical intervention aims to prevent or alleviate this through the use of a bone graft or an alloplastic implant to reconstitute the continuity of the orbit. However, in doing so, the implant itself may result in the unexpected adherence of the periorbita, resulting in orbital adherence syndrome...
March 2017: Craniomaxillofacial Trauma & Reconstruction
Seunggeol Ryu, Prosenjit Sen, Youngsuk Nam, Choongyeop Lee
When a water drop impacts a mesh having submillimeter pores, a part of the drop penetrates through the mesh if the impact velocity is sufficiently large. Here we show that different surface wettability, i.e., hydrophobicity and superhydrophobicity, leads to different water penetration dynamics on a mesh during drop impact. We show, despite the water repellence of a superhydrophobic surface, that water can penetrate a superhydrophobic mesh more easily (i.e., at a lower impact velocity) over a hydrophobic mesh via a penetration mechanism unique to a superhydrophobic mesh...
January 6, 2017: Physical Review Letters
Patrick O Sorensen, Pamela H Templer, Lynn Christenson, Jorge Duran, Timothy Fahey, Melany C Fisk, Peter M Groffman, Jennifer L Morse, Adrien C Finzi
Snow cover is projected to decline during the next century in many ecosystems that currently experience a seasonal snowpack. Because snow insulates soils from frigid winter air temperatures, soils are expected to become colder and experience more winter soil freeze-thaw cycles as snow cover continues to decline. Tree roots are adversely affected by snowpack reduction, but whether loss of snow will affect root-microbe interactions remains largely unknown. The objective of this study was to distinguish and attribute direct (e...
December 2016: Ecology
K C Nune, A Kumar, R D K Misra, S J Li, Y L Hao, R Yang
We elucidate here the osteoblasts functions and cellular activity in 3D printed interconnected porous architecture of functionally gradient Ti-6Al-4V alloy mesh structures in terms of cell proliferation and growth, distribution of cell nuclei, synthesis of proteins (actin, vinculin, and fibronectin), and calcium deposition. Cell culture studies with pre-osteoblasts indicated that the interconnected porous architecture of functionally gradient mesh arrays was conducive to osteoblast functions. However, there were statistically significant differences in the cellular response depending on the pore size in the functionally gradient structure...
February 1, 2017: Colloids and Surfaces. B, Biointerfaces
Manuel López-Cano, Xavier Serra-Aracils, Laura Mora, José Luis Sánchez-García, Luis Miguel Jiménez-Gómez, Marc Martí, Francesc Vallribera, Domenico Fraccalvieri, Anna Serracant, Esther Kreisler, Sebastiano Biondo, Eloy Espín, Salvador Navarro-Soto, Manuel Armengol-Carrasco
OBJECTIVE: The aim of this study was to assess the reduction in the incidence of parastomal hernia (PH) after placement of prophylactic synthetic mesh using a modified Sugarbaker technique when a permanent end-colostomy is needed. SUMMARY OF BACKGROUND DATA: Prevention of PH formation is crucial given the high prevalence of PH and difficulties in the surgical repair of PH. METHODS: A randomized, prospective, double-blind, and controlled trial...
December 2016: Annals of Surgery
Ronak Dholakia, Chander Sadasivan, David J Fiorella, Henry H Woo, Baruch B Lieber
Cerebral aneurysms are pathological focal evaginations of the arterial wall at and around the junctions of the circle of Willis. Their tenuous walls predispose aneurysms to leak or rupture leading to hemorrhagic strokes with high morbidity and mortality rates. The endovascular treatment of cerebral aneurysms currently includes the implantation of fine-mesh stents, called flow diverters, within the parent artery bearing the aneurysm. By mitigating flow velocities within the aneurysmal sac, the devices preferentially induce thrombus formation in the aneurysm within hours to days...
February 1, 2017: Journal of Biomechanical Engineering
Jaime Andres Perez-Taborda, Miguel Muñoz Rojo, Jon Maiz, Neophytos Neophytou, Marisol Martin-Gonzalez
In this work, we measure the thermal and thermoelectric properties of large-area Si0.8Ge0.2 nano-meshed films fabricated by DC sputtering of Si0.8Ge0.2 on highly ordered porous alumina matrices. The Si0.8Ge0.2 film replicated the porous alumina structure resulting in nano-meshed films. Very good control of the nanomesh geometrical features (pore diameter, pitch, neck) was achieved through the alumina template, with pore diameters ranging from 294 ± 5nm down to 31 ± 4 nm. The method we developed is able to provide large areas of nano-meshes in a simple and reproducible way, being easily scalable for industrial applications...
2016: Scientific Reports
S Harsløf, N Zinther, T Harsløf, C Danielsen, P Wara, H Friis-Andersen
PURPOSE: The choice of mesh and anchoring device in laparoscopic ventral hernia repair is controversial. Clinically important long-term properties of mesh and anchoring device such as mesh shrinkage have been sparsely investigated. Furthermore, the effect of various anchoring devices on mesh properties has never been examined. METHODS: In 20 sheep, using laparoscopy, we inserted three PhysiomeshTM (large pore, lightweight) and three VentralightTMST (small pore, mediumweight), anchored with ProTackTM, SecurestrapTM or GlubranTM, respectively...
February 2017: Hernia: the Journal of Hernias and Abdominal Wall Surgery
Charles P Shahan, Nathaniel N Stoikes, Esra Roan, James Tatum, David L Webb, Guy R Voeller
BACKGROUND: Non-penetrating mesh fixation is becoming widely accepted even though little is known about the short-term fixation strength of these techniques. Although clinical outcomes are the ultimate measure of effectiveness, ex vivo biomechanical evaluation provides insights about the load-carrying capacity of the mesh-tissue complex in vivo. As such, the purpose of this study was to compare the short-term fixation strength of three unique non-penetrating methods of fixation: LifeMesh™, ProGrip™, and Tisseel™...
March 2017: Surgical Endoscopy
Chao Deng, Jiong Ma, Heiying Jin, Wei Gong, Shuiming Wang, Hao Chen, Yimei Fan, Qinglan Yang
OBJECTIVE: To explore the application of a novel device of collecting large amount of fecal mucosa for detecting the DNA methylation and screening colorectal cancer. METHODS: Preoperative complete fecal sample and surgical specimen of 10 patients with colorectal cancer, and complete fecal sample and normal bowel mucosal samples confirmed by colonoscopy of 6 hospitalization cases at The Third Affiliated Hospital, Nanjing University of TCM from March to April 2014 were collected...
June 2016: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
Michelle Kelly, Katherine Macdougall, Oluwafisayo Olabisi, Neil McGuire
INTRODUCTION AND HYPOTHESIS: Polypropylene is a material that is commonly used to treat pelvic floor conditions such as pelvic organ prolapse (POP) and stress urinary incontinence (SUI). Owing to the nature of complications experienced by some patients implanted with either incontinence or prolapse meshes, the biocompatibility of polypropylene has recently been questioned. This literature review considers the in vivo response to polypropylene following implantation in animal models. The specific areas explored in this review are material selection, impact of anatomical location, and the structure, weight and size of polypropylene mesh types...
February 2017: International Urogynecology Journal
Manuel López-Cano, Xavier Serra-Aracil, Laura Mora, José Luis Sánchez-García, Luis Miguel Jiménez-Gómez, Marc Martí, Francesc Vallribera, Domenico Fraccalvieri, Anna Serracant, Esther Kreisler, Sebastiano Biondo, Eloy Espín, Salvador Navarro-Soto, Manuel Armengol-Carrasco
OBJECTIVE: The aim of this study was to assess the reduction in the incidence of parastomal hernia (PH) after placement of prophylactic synthetic mesh using a modified Sugarbaker technique when a permanent end-colostomy is needed. SUMMARY OF BACKGROUND DATA: Prevention of PH formation is crucial given the high prevalence of PH and difficulties in the surgical repair of PH. METHODS: A randomized, prospective, double-blind, and controlled trial...
March 8, 2016: Annals of Surgery
Filip E Muysoms, Olivier Detry, Tijl Vierendeels, Marc Huyghe, Marc Miserez, Martin Ruppert, Tim Tollens, Jean-Olivier Defraigne, Frederik Berrevoet
BACKGROUND: The incidence of incisional hernias after abdominal aortic aneurysm repair is high. Prophylactic mesh-augmented reinforcement during laparotomy closure has been proposed in patients at high risk of incisional hernia. METHODS: A multicenter randomized trial was conducted on patients undergoing elective abdominal aortic aneurysm repair through a midline laparotomy ( NCT00757133). In the study group, retromuscular mesh-augmented reinforcement was performed with a large-pore polypropylene mesh (Ultrapro, width 7...
April 2016: Annals of Surgery
Claudio Birolini, Jocielle Santos de Miranda, Edivaldo Massazo Utiyama, Samir Rasslan, Dario Birolini
INTRODUCTION: The management of chronic mesh infection is challenging and controversial. The use of synthetic material to repair the abdominal wall in the infected setting is not recommended, especially in the presence of active infection caused by Staphylococcus aureus. METHODS: This is a prospective observational study designed to evaluate the outcomes in patients with active mesh infection caused by Staphylococcus aureus. Patients underwent simultaneous removal and replacement of polypropylene mesh...
April 2016: International Journal of Surgery
Kenny W Q Low, Raoul van Loon, Samuel A Rolland, Johann Sienz
This paper reviews and further develops pore-scale computational flow modeling techniques used for creeping flow through orthotropic fiber bundles used in blood oxygenators. Porous model significantly reduces geometrical complexity by taking a homogenization approach to model the fiber bundles. This significantly simplifies meshing and can avoid large time-consuming simulations. Analytical relationships between permeability and porosity exist for Newtonian flow through regular arrangements of fibers and are commonly used in macroscale porous models by introducing a Darcy viscous term in the flow momentum equations...
May 2016: Journal of Biomechanical Engineering
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