PubMed Journals Articles About "Impregnated With Silver Nanoparticles AgTive Cannulation Central Venous" RSS

11:55 EDT 26th July 2016 | BioPortfolio

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Showing "impregnated with silver nanoparticles AgTive cannulation Central Venous" PubMed Articles 1–25 of 9,000+

Effectiveness of Minocycline/Rifampin vs Chlorhexidine/Silver Sulfadiazine-Impregnated Central Venous Catheters.

Guide Wire Loss of Femoral Venous Cannulation: Case Report and Literature Review.

Placement of a central venous catheter (CVC) is a common procedure, often replaced by femoral vein cannulation. The overall complication rate is 12 - 15%. Loss of a complete guide wire into the circulation is a rare and preventable complication. Here we report a case of guide wire loss during femoral venous cannulation and literature review.

Silver Nanoparticles: A New View on Mechanistic Aspects on Antimicrobial Activity.

Silver nanoparticles are well known potent antimicrobial agent. Although significant progresses have been achieved on the elucidation of antimicrobial mechanism of silver nanoparticles, the exact mechanism of action is still not completely known. This overview incorporates a retrospective of previous reviews published and recent original contributions on the progress of research on antimicrobial mechanisms of silver nanoparticles. The main topics discussed include release of silver nanoparticles and silver ...

Step-Reduced Synthesis of Starch-Silver Nanoparticles.

In the present process, silver nanoparticles were directly synthesized in a single step by microwave irradiation of a mixture of starch, silver nitrate, and deionized water. This is different from the commonly adopted procedure for starch-silver nanoparticle synthesis in which silver nanoparticles are synthesized by preparing a starch solution as a reaction medium first. Thus, the additional step associated with the preparation of the starch solution was eliminated. In addition, no additional reducing agent...

Changes in clinical practice for central venous access cannulation after the introduction of ultrasound studies in the ICU.

Central venous catheter cannulation by a trained ultrasound team in onco-haematological patients.

Toxic effects of silver nanoparticles in mammals - does a risk of neurotoxicity exist?

Over the last decade, silver nanoparticles have become an important class of nanomaterials utilized in the development of new nanotechnologies. Despite the fact that nanosilver is used in many commercial applications, our knowledge about its associated risks is incomplete. Although a number of studies have been undertaken to better understand the impact of silver nanoparticles on the environment, aquatic organisms and cell lines, little is known about their side effects in mammalian organisms. This review s...

Evaluation of adjusted central venous blood gases versus arterial blood gases of patients in post-operative paediatric cardiac surgical intensive care unit.

Central venous catheters are in situ in most of the intensive care unit (ICU) patients, which may be an alternative for determining acid-base status and can reduce complications from prolonged arterial cannulation. The aim of this study was to examine the reliability between adjusted central venous blood gas (aVBG) and arterial blood gas (ABG) samples for pH, partial pressure of carbon-di-oxide (pCO2), bicarbonate (HCO3 (-)), base excess (BE) and lactates in paediatric cardiac surgical ICU.

Ultrasound guided technique for central venous catheters cannulation in critical care patients.

Long-Axis Versus Short-Axis View of Ultrasound-Guided Central Venous Cannulation.

Silver Nanoparticles Stabilized Using Chitosan Films: Preparation, Properties and Antibacterial Activity.

In this work we present silver nanoparticles coated with chitosan films synthesized by a simple, environmentally friendly method. Silver nanoparticles were prepared and stabilized by reduction of silver nitrate with chitosan without addition of harmful reduction agents. The presence of silver nanoparticles in the solid films was studied by the X-ray diffraction spectroscopy and X-ray photoelectron spectroscopy. Solid films were dissolved and the solution was observed by the ultraviolet-visible spectroscopy ...

Encapsulated Silver Nanoparticles Can Be Directly Converted to Silver Nanoshell in the Gas Phase.

We report, for the first time, that an encapsulated silver nanoparticle can be directly converted to a silver nanoshell through a nanoscale localized oxidation and reduction process in the gas phase. Silver can be etched when exposed to a mixture of NH3/O2 gases through a mechanism analogous to the formation of aqueous Tollens' reagent, in which a soluble silver-ammonia complex was formed. Starting with Ag@resorcinol-formaldehyde (RF) resin core-shell nanoparticles, we demonstrate that RF-core@Ag-shell nano...

Multilevel modeling of retention and disinfection efficacy of silver nanoparticles on ceramic water filters.

This research examined how variations in synthesis methods of silver nanoparticles affect both the release of silver from ceramic water filters (CWFs) and disinfection efficacy. The silver nanoparticles used were stabilized by four different molecules: citrate, polyvinylpyrrolidone, branched polyethylenimine, and casein. A multilevel statistical model was built to quantify if there was a significant difference in: a) extent of silver lost, b) initial amount of silver lost, c) silver lost for water of differ...

Silver-impregnated hydrofiber dressing followed by delayed surgical closure for management of infants born with giant omphaloceles.

We successfully employed silver-impregnated hydrofiber dressing for management of giant omphaloceles (GO) followed by delayed surgical closure.

Right Internal Jugular Vein Cannulation: Carotid Artery-directed versus Sternocleidomastoid-directed Methods.

The aim of the present study was to explore a simple and safe method for central venous catheterization (CVC) from the right internal jugular vein (RIJV) by comparing carotid artery (CA) positioning with sternocleidomastoid (SCM) positioning. The medical records of patients who underwent CVC between January 2011 and January 2015 were retrospectively reviewed. Central venous catheters were inserted into the RIJV either above the level of the cricoid cartilage using the CA-directed method (419 patients, Group...

Randomized comparison of three transducer orientation approaches for ultrasound guided internal jugular venous cannulation.

Ultrasound-guided internal jugular venous access increases the rate of successful cannulation and reduces the incidence of complications, compared with the landmark technique. Three transducer orientation approaches have been proposed for this procedure: short-axis (SAX), long-axis (LAX) and oblique-axis (OAX). Our goal was to assess and compare the performance of these approaches.

Spectral Studies of UV and Solar Photocatalytic Degradation of AZO Dye and Textile Dye Effluents Using Green Synthesized Silver Nanoparticles.

The photocatalytic degradation of the chemical dye AZO and dye effluents in different time duration has been investigated using biologically synthesized silver nanoparticles. Dye industry effluents and AZO dye undergo degradation to form harmless intermediate and colourless products following irradiation by UV and solar light in the presence of green synthesized silver nanoparticles. The degree of degradation was tested under the experimental conditions such as P(H), temperature, and absorbance of the dye i...

Leaching and antimicrobial properties of silver nanoparticles loaded onto natural zeolite clinoptilolite by ion exchange and wet impregnation.

This study aimed to compare the leaching and antimicrobial properties of silver that was loaded onto the natural zeolite clinoptilolite by ion exchange and wet impregnation. Silver ions were reduced using sodium borohydride (NaBH4). The leaching of silver from the prepared silver-clinoptilolite (Ag-EHC) nanocomposite samples and their antimicrobial activity on Escherichia coli Epi 300 were investigated. It was observed that the percentage of silver loaded onto EHC depended on the loading procedure and the c...

In Situ Synthesis of Antimicrobial Silver Nanoparticles within Antifouling Zwitterionic Hydrogels by Catecholic Redox Chemistry for Wound Healing Application.

A multifunctional hydrogel that combines the dual functionality of both antifouling and antimicrobial capacities holds great potential for many bioapplications. Many approaches and different materials have been employed to synthesize such a material. However, a systematic study including in-vitro and in-vivo evaluation on such a material as wound dressings are highly scarce at present. Herein, we report on a new strategy that uses catecholic chemistry to synthesize anti-microbial silver nanoparticles impreg...

Metal nanoparticles in the presence of lipopolysaccharides trigger the onset of metal allergy in mice.

Many people suffer from metal allergy, and the recently demonstrated presence of naturally occurring metal nanoparticles in our environment could present a new candidate for inducing metal allergy. Here, we show that mice pretreated with silver nanoparticles (nAg) and lipopolysaccharides, but not with the silver ions that are thought to cause allergies, developed allergic inflammation in response to the silver. nAg-induced acquired immune responses depended on CD4(+) T cells and elicited IL-17A-mediated inf...

Surface sorption and nanoparticle production as a silver detoxification mechanism of the freshwater alga Parachlorella kessleri.

SEM, EDS, TEM, FTIR and UV-vis analysis were used to investigate the biosorption, bioaccumulation and bioreduction of silver by the freshwater green alga Parachlorella kessleri. The dead algal biomass showed high potential for silver removal; 75% of silver was removed within 2min. Surface sorption was the main mechanism; bioreduction contributed to the biosorption only to a small extent. In the presence of living P. kessleri cells a 68% decrease of silver concentration was observed within 24h, but subsequen...

Apoptotic efficacy of biogenic silver nanoparticles on human breast cancer MCF-7 cell lines.

This article describes the synthesis of silver nanoparticles using the aqueous extract of Alternanthera sessilis as a reducing agent by sonication, espousing green chemistry principles. Biologically synthesized nanoparticle-based drug delivery systems have significant potential in the field of biopharmaceutics due to its smaller size entailing high surface area and synergistic effects of embedded biomolecules. In the present work the cytotoxic effect of biosynthesized silver nanoparticles studied by MTT ass...

Pentacenequinone Stabilized Silver Nanoparticles: A Reusable Catalyst for the Diels-Alder 4 + 2 Cycloaddition Reactions.

Silver nanoparticles (AgNPs) stabilized by aggregates of derivative 4 have been used as catalyst for the construction of synthetically and biologically important [4+2] cycloadducts at room temperature.

Tunnelled central venous line-associated infections in patients with pulmonary arterial hypertension treated with intravenous prostacyclin.

Intravenous prostacyclins are a valuable treatment for patients with severe pulmonary arterial hypertension, leading to improved exercise capacity, haemodynamics, quality of life and survival. Unfortunately, due to the short half-life of these drugs, they need to be administered continuously through central venous catheters. Despite aseptic technique, regular dressing changes, tunneled central venous catheters and patient education, patients are exposed to central venous catheter associated infections. Thes...

A fluorescent nanoprobe for single bacterium tracking: functionalization of silver nanoparticles with tryptophan to probe the nanoparticle accumulation with single cell resolution.

The investigation of the interaction of silver nanoparticles and live bacteria cells is of particular importance for understanding and controlling their bactericidal properties. In this study, the process of internalization of silver nanoparticles in Escherichia coli cells was followed by means of synchrotron excitation deep ultraviolet (DUV) fluorescence imaging. Antimicrobial nanostructures that can absorb and emit light in the UV region were prepared by functionalization of silver nanoparticles with tryp...

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