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

00:50 EST 28th November 2015 | BioPortfolio

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Showing "impregnated with silver nanoparticles AgTive cannulation Central Venous" PubMed Articles 1–25 of 8,800+

Efficiency of chlorhexidine-silver sulfadiazine-impregnated venous catheters at subclavian sites.

Cost-effectiveness analyses show that chlorhexidine-silver sulfadiazine (CHSS)-impregnated catheters reduce catheter-related bloodstream infection (CRBSI) and central venous catheter (CVC)-related costs. However, no studies have reported the efficiency of CHSS-impregnated catheters for venous access when the risk of CRBSI is low; for example, at the subclavian site. This study determined the cost of a CVC, diagnosis of CRBSI, and antimicrobial agents to treat CRBSI; we did not consider the cost of increased...

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

Subclavian Vein Cannulation Success Rate in Neonates and Children.

Central vein cannulation allows the administration of large volumes of fluids in short times and at high osmolarities for rehydration, volume replacement, chemotherapy, and parenteral nutrition. Percutaneous central venous line insertion has replaced peripheral venous cut-down as the primary mode of short-term venous access in children.

Early cannulation grafts for haemodialysis: a systematic review.

Arteriovenous grafts have advantages compared with central venous catheters for dialysis access and guidelines suggest their use as second choice after arteriovenous fistulas. Standard practice with expanded polytetrafluoroethylene (ePTFE) grafts has been to avoid cannulation for 2 weeks following placement, but new generation grafts have been marketed for their early cannulation properties allowing use as an alternative to central venous catheters for prompt access. The aim of this review is to search the ...

Malposition of central venous catheter in the jugular venous arch via external jugular vein -a case report.

The central venous cannulation is commonly performed in the operating rooms and intensive care units for various purposes. Although the central venous catheter (CVC) is used in many ways, the malpositioning of the CVC is often associated with serious complications. We report a case of an unexpected malposition of a CVC in the jugular venous arch via external jugular vein.

An unusual route taken by a central venous catheter resulting in inadvertent subclavian artery cannulation: a case report.

Ultrasound-guided cannulation of a central venous catheter into the internal jugular vein (IJV) was performed in the intensive care unit for a critically ill patient. The catheter was inserted into the subclavian artery distally, despite prior ultrasound confirmation of the guidewire position using both the in-plane and out-of-plane views. The catheter was removed successfully by the interventional radiologist with a closure device. To our knowledge, there have been previous case reports of subclavian arter...

Ultrasound-guided cannulation of the brachiocephalic vein in neonates and infants.

Central venous catheter (CVC) insertion in neonates and small infants is a challenging and high risk procedure. Ultrasound (US) guided cannulation increases the success rate and reduces procedural-related complications. The internal jugular vein is the most frequent site for US-guided CVC insertion. However this approach is technically demanding in neonates and small infants. US-guided supraclavicular cannulation of the brachiocephalic vein (BCV) is a new approach that may be advantageous in case of difficu...

Clinical evaluation of a silver-impregnated foam dressing in paediatric partial-thickness burns.

Mepilex Ag, a silver-impregnated foam dressing, was introduced to our institution in 2007 and our outcomes in the treatment of paediatric burns were observed to improve significantly. In order to confirm these observations, we wanted to evaluate the results of using the silver-impregnated foam dressing in partial-thickness paediatric burns.

Impact of antibiotic- and silver-impregnated external ventricular drains on the risk of infections: A systematic review and meta-analysis.

External ventricular drainage (EVD) is one of the most common and effective procedures in neurosurgery practice. However, catheter-related infection (CRI), which is associated with significant mortality and morbidity, plagues this procedure. We evaluated the efficacy of antibiotic-impregnated EVD (AI-EVD) and silver-impregnated EVD (SI-EVD) catheters compared with plain EVD catheters for the prevention of CRI.

Anodic Stripping Voltammetry of Silver Nanoparticles: Aggregation Leads to Incomplete Stripping.

The influence of nanoparticle aggregation on anodic stripping voltammetry is reported. Dopamine-capped silver nanoparticles were chosen as a model system, and melamine was used to induce aggregation in the nanoparticles. Through the anodic stripping of the silver nanoparticles that were aggregated to different extents, it was found that the peak area of the oxidative signal corresponding to the stripping of silver to silver(I) ions decreases with increasing aggregation. Aggregation causes incomplete strippi...

Synthesis of silver nanoparticle at a gas/liquid interface in the presence of silver seeds and its application for electrochemical sensing.

Silver nanoparticles were synthesized by reducing [Ag(NH3)2](+) at a gas/liquid interface in the presence of silver seeds. Transmission electron microscopy (TEM) observations reveal that the size of these silver nanoparticles is around 35-40nm with the average particle size of 37nm. The silver nanoparticles were applied for the electrochemical sensor and electrochemical investigations indicate that the nanoparticles possess an excellent performance toward H2O2. The linear range is estimated to be from 5.0μ...

Ultrasound-guided supraclavicular cannulation of the right brachiocephalic vein in small infants: a consecutive, prospective case series.

The supraclavicular ultrasound (US)-guided cannulation of the brachiocephalic vein (BCV) is one option of central venous line placement in infants.

Bedside Ultrasonography for Arteriovenous Fistula Cannulation.

Difficulty in accessing a new arteriovenous fistula (AVF) is a common technical issue in hemodialysis patients, which often leads to interventional radiology and/or vascular surgery referral. As a consequence, the patient who needs dialysis may require a temporary dialysis catheter with its known potential complications. We present a case where bedside ultrasonography facilitated successful cannulation of a difficult AVF. Ultrasonography (US) training in this procedure may allow early cannulation of new AVF...

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

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...

Pseudomonas deceptionensis DC5-mediated synthesis of extracellular silver nanoparticles.

The biological synthesis of metal nanoparticles is of great interest in the field of nanotechnology. The present work highlights the extracellular biological synthesis of silver nanoparticles using Pseudomonas deceptionensis DC5. The particles were synthesized in the culture supernatant within 48 h of incubation. Extracellular synthesis of silver nanoparticles in the culture supernatant was confirmed by ultraviolet-visible spectroscopy, which showed the absorption peak at 428 nm, and also under field emissi...

Interaction of silver nanoparticles with tethered bilayer lipid membranes.

Silver nanoparticles are well known for their antibacterial properties. However, the detailed mechanism describing the interaction between the nanoparticles and a cell membrane is not fully understood, which can impede the use of the particles in biomedical applications. Here, a tethered bilayer lipid membrane has been used as a model system to mimic a natural membrane and to study the effect of exposure to small silver nanoparticles with diameters of about 2 nm. The solid supported membrane architecture al...

The fate of nano-silver in aqueous media.

Silver nanoparticles offer highly attractive properties for many applications, however concern has been raised over the possible toxicity of this material in environmental systems. While it is thought that the release of Ag(+) can play a crucial role in this toxicity, the mechanism by which the oxidative dissolution of nano-silver occurs is not yet understood. Here we address this through the electrochemical analysis of gold-core silver-shell nanoparticles in various solutions. This novel method allows the ...

New Toxicity Mechanism of Silver Nanoparticles: Promoting Apoptosis and Inhibiting Proliferation.

Silver nanoparticles are increasingly recognized for their utility in biological applications, especially antibacterial effects. Herein, we confirmed the antibacterial effect of silver nanoparticles on Escherichia coli using the conventional optical density (OD) and colony-forming units (CFU) method and used flow cytometry (FC), TEM and BrdU ELISA to investigate the mechanisms of this effect. From the results, we conclude that AgNPs can simultaneously induce apoptosis and inhibit new DNA synthesis in the ce...

Reduction of silver (I) using defatted cashew nut shell starch and its structural comparison with commercial product.

In this current study, we report on the reduction of noble metal silver into silver nanoparticles using defatted cashew nut shell (CNS) starch as both the reducing and capping agents. Furthermore, it was compared with commercially available silver nanopowder for the first time. Color changes, ultraviolet-visible spectra (433.76nm), X-ray diffraction peaks (2θ=37.8, 46.3, 66.2, and 77.92) revealed the face-centered cubic (fcc) geometry of silver nanoparticles, scanning electron microscopy-energy dispersive ...

The influence of joining central venous catheter and pressure transducer with T-junctions on central venous pressure.

To investigate the influence of the number of T-junctions between central venous catheter and pressure transducer on measurement of central venous pressure ( CVP ) in patients.

Stochastic on-chip detection of sub-picomolar concentrations of silver nanoparticles.

We introduce the stochastic amperometric detection of silver nanoparticles on-chip using a microelectrode array. The tech-nique combines the advantages of parallel and low-noise recordings at individually addressable microelectrodes. We demonstrate the detection of sub-picomolar concentrations of silver nanoparticles with a diameter of 10 nm at sampling rates in the kilohertz regime for each channel. By comparison to random walk simulations, we show that the sensitivity of a single measurement is mainly lim...

Biologically synthesised silver nanoparticles from three diverse family of plant extracts and their anticancer activity against epidermoid A431 carcinoma.

Biological synthesis of silver nanoparticles is a cost effective natural process where the phytochemicals specifically phenols, flavonoids and terpenoids present in the plant extracts act as capping and reducing agent. Due to their nano size regime the silver nanoparticles may directly bind to the DNA of the pathogenic bacterial strains leading to higher antimicrobial activity.

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.

Sumac Silver Novel Biodegradable Nano Composite for Bio-Medical Application: Antibacterial Activity.

The development of reliable and ecofriendly approaches for the production of nanomaterials is a significant aspect of nanotechnology nowadays. One of the most important methods, which shows enormous potential, is based on the green synthesis of nanoparticles using plant extract. In this paper, we aimed to develop a rapid, environmentally friendly process for the synthesis silver nanoparticles using aqueous extract of sumac. The bioactive compounds of sumac extract seem to play a role in the synthesis and ca...