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Sankalp Dwivedi, Fayez Siddiqui, Milan Patel, Shaun Cardozo
Central venous catheter (CVC) insertion rarely causes cardiac tamponade due to perforation. Although it is a rare complication, it can be lethal if not identified early. We report a case of cardiac tamponade caused by internal jugular (IJ) central venous catheter (CVC) insertion using a soft J-tipped guide wire which is considered safe and rarely implicated with cardiac tamponade. A bedside transthoracic echocardiogram (TTE) revealed a pericardial effusion with tamponade. An emergent bedside pericardiocentesis was done revealing bloody fluid and resulted in clinical stabilization...
2016: Case Reports in Critical Care
Se-Chan Kim, Ingo Gräff, Alexandra Sommer, Andreas Hoeft, Stefan Weber
PURPOSE: The ultrasound-guided central venous catheter (CVC) guidewire tip positioning has been demonstrated for catheterization of the right internal jugular vein. We explored the feasibility of an ultrasound-guided right subclavian vein (RScV) CVC tip positioning via a right supraclavicular approach using a microconvex probe. METHODS: Twenty patients scheduled for elective surgery were consecutively included in this observational feasibility study following written informed consent...
September 21, 2016: Journal of Vascular Access
Caroline Gavin, John Coblentz, Jeffrey R Acsell, Anthony G Shackelford, Joseph J Sistino
Vent vacuum relief valves (VRVs) are used to limit the negative pressure at the ventricular vent catheter tip as well as prevent reversal of blood flow and prevention of air embolism. The purpose of this study was to evaluate the performance of three commercially available ventricular vent valves. The negative pressure at which the vent valve opened was measured at the valve inlet using high-fidelity pressure transducers. Also, the flow rate at which air entrainment occurred due to valve opening was recorded...
March 2015: Journal of Extra-corporeal Technology
Cody E Hinchliff, Stephen A Smith, James F Allman, J Gordon Burleigh, Ruchi Chaudhary, Lyndon M Coghill, Keith A Crandall, Jiabin Deng, Bryan T Drew, Romina Gazis, Karl Gude, David S Hibbett, Laura A Katz, H Dail Laughinghouse, Emily Jane McTavish, Peter E Midford, Christopher L Owen, Richard H Ree, Jonathan A Rees, Douglas E Soltis, Tiffani Williams, Karen A Cranston
Reconstructing the phylogenetic relationships that unite all lineages (the tree of life) is a grand challenge. The paucity of homologous character data across disparately related lineages currently renders direct phylogenetic inference untenable. To reconstruct a comprehensive tree of life, we therefore synthesized published phylogenies, together with taxonomic classifications for taxa never incorporated into a phylogeny. We present a draft tree containing 2.3 million tips-the Open Tree of Life. Realization of this tree required the assembly of two additional community resources: (i) a comprehensive global reference taxonomy and (ii) a database of published phylogenetic trees mapped to this taxonomy...
October 13, 2015: Proceedings of the National Academy of Sciences of the United States of America
N C D Morley, K C Muir, S Mirsadraee, E J R van Beek, J T Murchison
AIM: To examine the number and nature of investigations performed for suspected pulmonary embolism (PE) in a large teaching hospital and the change in incidence and severity of PE over a decade. MATERIALS AND METHODS: In this retrospective study, all patients investigated for suspected PE using computed tomography pulmonary angiography (CTPA) or lung scintigraphy during 10 years to March 2012 were identified and their records reviewed. In the final year, all reportedly positive CTPA cases were reviewed and PE severity calculated, for comparison with similar historical data...
December 2015: Clinical Radiology
Takahisa Kato, Ichiro Okumura, Sang-Eun Song, Alexandra J Golby, Nobuhiko Hata
In this paper, we present a tendon-driven continuum robot for endoscopic surgery. The robot has two sections for articulation actuated by tendon wires. By actuating the two sections independently, the robot can generate a variety of tip positions while maintaining the tip direction. This feature offers more flexibility in positioning the tip for large viewing angles of up to 180 degrees than does a conventional endoscope. To accurately estimate the tip position at large viewing angles, we employed kinematic mapping with a tension propagation model including friction between the tendon wires and the robot body...
October 2015: IEEE/ASME Transactions on Mechatronics
Stephen J Usala, William C Biggs, Faye O'Brien-Usala
OBJECTIVE: To develop an assay for vaginal CA125 and determine if vaginal levels correlate with the phase of the menstrual cycle. STUDY DESIGN: Fifteen women through a total of 20 ovulatory cycles obtained daily vaginal swabs for assay. Sampling began within the first 3 days after menses in and continued into the luteal phase. The subjects eluted the cotton swab tips in vials containing a standard volume of water. At the completion of each cycle the vial concentrations of CA125 were measured with the Siemens IMMULITE 2000...
July 2015: Journal of Reproductive Medicine
Thomas J Willson, Tyler Swiss, Jose E Barrera
IMPORTANCE: Imparting surgical change to the nasal tip remains one of the most challenging aspects of rhinoplasty. The surgeon must assess the tip preoperatively and execute the necessary maneuvers to impart the desired change. OBJECTIVE: To assess nasal tip resistance to compression in a cadaveric model before and after specific rhinoplasty maneuvers using a novel method. DESIGN, SETTING, AND MATERIALS: Open rhinoplasty maneuvers were performed at an academic tertiary care center on 6 fresh-thawed cadaver heads...
November 2015: JAMA Facial Plastic Surgery
Christopher H Renninger, Vanna J Rocchi, Leo T Kroonen
PURPOSE: Targeted muscle reinnervation (TMR) offers enhanced prosthetic use by harnessing additional neural control from unused nerves in the amputated limb. The purpose of this study was to document the location and number of motor end plates to each muscle commonly used in TMR in the brachium relative to proximally based bony landmarks. METHODS: We dissected 18 matched upper limbs (9 fresh-frozen cadavers). The locations of each of the nerves' muscular insertions into the medial biceps and brachialis were measured relative to the anterolateral tip of the acromion...
November 2015: Journal of Hand Surgery
Radka Jersakova, Celine Souchay, Richard J Allen
This study investigated the effect of the emotional nature of to-be-retrieved material on semantic retrieval monitoring. Across 2 groups, participants were either asked whether they have experienced a tip-of-the-tongue (TOT) state or to make a feeling-of-knowing (FOK) judgment. We examined the overall reporting rate as well as subjective (not accompanied by partial information recall) TOT and FOK reporting, comparing whether these differed between emotional (negatively valenced and arousing) and neutral items...
December 2015: Canadian Journal of Experimental Psychology, Revue Canadienne de Psychologie Expérimentale
Wilson B Luiz, Juliana F Rodrigues, Joseph H Crabb, Stephen J Savarino, Luis C S Ferreira
Globally, enterotoxigenic Escherichia coli (ETEC) is a leading cause of childhood and travelers' diarrhea, for which an effective vaccine is needed. Prevalent intestinal colonization factors (CFs) such as CFA/I fimbriae and heat-labile enterotoxin (LT) are important virulence factors and protective antigens. We tested the hypothesis that donor strand-complemented CfaE (dscCfaE), a stabilized form of the CFA/I fimbrial tip adhesin, is a protective antigen, using a lethal neonatal mouse ETEC challenge model and passive dam vaccination...
December 2015: Infection and Immunity
R Rapacz, K Balin, M Wojtyniak, J Szade
The relation between surface morphology and local conductance was studied for single crystalline thin films of Bi2Te3 grown on mica. Atomic force microscopy and electron diffraction revealed the hexagonal order of the surface with quintuple layer steps and spiral islands. Furthermore, the experiments using contact mode AFM with conducting tip performed at room temperature revealed the high conductance of the surface, which was locally reduced due to changes in the local electronic structure at the defects (e...
October 14, 2015: Nanoscale
A W Maurits van der Graaf, Pranav Bhagirath, Jacques de Hooge, Hemanth Ramanna, Vincent J H M van Driel, Natasja M S de Groot, Marco J W Götte
BACKGROUND: With the advent of magnetic resonance imaging (MRI) conditional pacemaker systems, the possibility of performing MRI in pacemaker patients has been introduced. Besides for the detailed evaluation of atrial and ventricular volumes and function, MRI can be used in combination with body surface potential mapping (BSPM) in a non-invasive inverse potential mapping (IPM) strategy. In non-invasive IPM, epicardial potentials are reconstructed from recorded body surface potentials (BSP)...
December 2015: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
Manuel J Marques, Adrian Bradu, Adrian Podoleanu
A configuration for Talbot bands is presented in which two tilted gratings replace the splitter normally used for recombining the signals from the two interferometer arms. The two optical beams from the interferometer are launched by two fiber leads tightly brought together in the front focal plane of a collimating lens. As the tips of the two fibers are slightly off-axis, the emergent beams after the collimating lens are not parallel. In combination with the two tilted gratings, the nonparallel launching of the two beams leads to a total elimination of mirror terms even when the two beams overlap on either grating...
September 1, 2015: Optics Letters
Ziming Zhao, Weiling Luan, Shaofeng Yin, Juergen J Brandner
A visualization method for monitoring minor metal crack propagation is presented in this paper. Through CdS@ZnS core-shell quantum dots (QDs) enhanced emission of photoluminescence (PL), this crack detection method provides a visualization signal in real time and through a noncontact fashion. The crack of the CdS@ZnS core-shell QDs-epoxy resin kept a synchronous propagation with the metal crack. Detection of the tip growth in the film layers demonstrated that the actual crack propagation on the metal surface could be deduced from the tips in the film layers...
July 20, 2015: Applied Optics
Diana M Ropcke, Christine Ilkjær, Søren N Skov, Marcell J Tjørnild, Anders V Sørensen, Henrik Jensen, Morten O J Jensen, Vibeke E Hjortdal, Sten L Nielsen
BACKGROUND: Stentless porcine extracellular matrix tricuspid tubular valves have been developed for tricuspid valve reconstruction. The purpose of this study was to compare biomechanical and functional performance of native and tube graft valves in an acute porcine model. METHODS: Twenty-two 65-kg pigs were randomized to tube graft or control with native valve preservation. Anterior papillary muscle force was measured with a dedicated force transducer. Microtip pressure catheters were placed in the right atrium and ventricle...
January 2016: Annals of Thoracic Surgery
Robert Weinmeister, Emma Freeman, Ian C Eperon, Alison M Stuart, Andrew J Hudson
Aqueous microdroplets with a volume of a few femtoliters are an ideal sample size for single-molecule fluorescence experiments. In particular, they enable prolonged measurements to be made on individual molecules that can diffuse freely in the surrounding medium. However, the rapid production of monodisperse droplets in a hydrodynamic flow, such as microfluidic flow focusing, will often involve volumes that are typically too large (>0.5 pL) for single-molecule studies. Desired volumes of a few femtoliters, or smaller, can be produced by either tip streaming or step emulsification in a flow-focusing device; however, in both of these methods, the aqueous droplets are dispersed in a large volume of the continuous phase, where individual droplets can diffuse perpendicular to the flow direction, and the monodispersity of droplet size produced by tip streaming is difficult to sustain for more than transient time scales...
October 27, 2015: ACS Nano
G Vidal-Diez de Ulzurrun, J M Baetens, J Van den Bulcke, C Lopez-Molina, I De Windt, B De Baets
Due to their ability to grow in complex environments, fungi play an important role in most ecosystems and have for that reason been the subject of numerous studies. Some of the main obstacles to the study of fungal growth are the heterogeneity of growth environments and the limited scope of laboratory experiments. Given the increasing availability of image capturing techniques, a new approach lies in image analysis. Most previous image analysis studies involve manual labelling of the fungal network, tracking of individual hyphae, or invasive techniques that do not allow for tracking the evolution of the entire fungal network...
November 2015: Fungal Genetics and Biology: FG & B
Frederike G I van Vilsteren, Roos E Pouw, Lorenza Alvarez Herrero, Raf Bisschops, Martin Houben, Frans T M Peters, B E Schenk, Bas L A M Weusten, Erik J Schoon, Jacques J G H M Bergman
BACKGROUND: Endoscopic resection is the cornerstone of endoscopic management of esophageal early neoplasia. However, endoscopic resection is a complex technique requiring knowledge and expertise. Our aims were to identify the most important learning points in performing endoscopic resection in a training setting and to provide information on how to improve endoscopic resection technique. METHODS: Six gastroenterologists at centers with multidisciplinary expertise in upper gastrointestinal oncology participated in a structured endoscopic resection training program, consisting of four training days with lectures and hands-on training on live pigs, further one-to-one hands-on training days, and written feedback (by an expert) on videos of unsupervised endoscopic resection procedures...
November 2015: Endoscopy
John F Kragh, James J Geracci, Donald L Parsons, John B Robinson, Kimberlie A Biever, Erling B Rein, Elon Glassberg, Geir Strandenes, Jacob Chen, Avi Benov, David Marcozzi, Stacy Shackelford, Kevin M Cox, Elizabeth A Mann-Salinas
Since 2009, out-of-hospital care of junctional hemorrhage bleeding from the trunk-appendage junctions has changed, in part, due to the newly available junctional tourniquets (JTs) that have been cleared by the US Food and Drug Administration. Given four new models of JT available in 2014, several military services have begun to acquire, train, or even use such JTs in care. The ability of users to be trained in JT use has been observed by multiple instructors. The experience of such instructors has been broad as a group, but their experience as individuals has been neither long nor deep...
2015: Journal of Special Operations Medicine: a Peer Reviewed Journal for SOF Medical Professionals
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