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https://www.readbyqxmd.com/read/28190986/algorithms-for-automatically-pointing-ultrasound-imaging-catheters
#1
Paul M Loschak, Laura J Brattain, Robert D Howe
A system for automatically pointing ultrasound (US) imaging catheters will enable clinicians to monitor anatomical structures and track instruments during interventional procedures. Off-the-shelf US catheters provide high quality US images from within the patient. While this method of imaging has been proven to be effective for guiding many interventional treatments, significant training is required to overcome the difficulty in manually steering the imager to point at desired structures. Our system uses closed-form four degree of freedom (DOF) kinematic solutions to automatically position the US catheter and point the imager...
February 2017: IEEE Transactions on Robotics: a Publication of the IEEE Robotics and Automation Society
https://www.readbyqxmd.com/read/28115801/review-of-treatment-for-thoracoabdominal-aortic-aneurysm-and-the-modern-experience-of-multi-branched-endograft-in-taiwan
#2
REVIEW
Ting Chao Lin, Chun Che Shih
Thoracoabdominal aortic aneurysm (TAAA) is a complicated aortic disease. Most treatments for other aortic aneurysms have already shifted from conventional open surgery to endovascular operation; but for TAAA, open surgery remains the gold standard treatment. Several alternative treatments such as hybrid operation as well as endovascular techniques are utilized for the treatment of TAAA. Some of the procedures combine off-the-shelf devices such as the chimney procedure. Some other procedures required custom-made specialized stent grafts...
January 2017: Acta Cardiologica Sinica
https://www.readbyqxmd.com/read/28115021/generation-of-mesenchymal-stromal-cells-from-cord-blood-evaluation-of-in-vitro-quality-parameters-prior-to-clinical-use
#3
Eliana Amati, Sabrina Sella, Omar Perbellini, Alberta Alghisi, Martina Bernardi, Katia Chieregato, Chiara Lievore, Denise Peserico, Manuela Rigno, Anna Zilio, Marco Ruggeri, Francesco Rodeghiero, Giuseppe Astori
BACKGROUND: Increasing evidence suggests the safety and efficacy of mesenchymal stromal cells (MSC) as advanced therapy medicinal products because of their immunomodulatory properties and supportive role in hematopoiesis. Although bone marrow remains the most common source for obtaining off-the-shelf MSC, cord blood (CB) represents an alternative source, which can be collected noninvasively and without major ethical concerns. However, the low estimated frequency and inconsistency of successful isolation represent open challenges for the use of CB-derived MSC in clinical trials...
January 24, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28104367/flexible-chitosan-nano-zno-antimicrobial-pouches-as-a-new-material-for-extending-the-shelf-life-of-raw-meat
#4
P Mujeeb Rahman, V M Abdul Mujeeb, K Muraleedharan
As a breakthrough to open up the industrial use of novel environmentally benign packaging material, we propose the first report on portable chitosan-ZnO nano-composite pouches that will serve as elite entrants in smart packaging. A facile, one pot procedure was adopted for the preparation of the C-ZnC films. In order to tune the property of C-ZnC films, four different composite films were prepared by varying the concentration of ZnO. The prepared films were found to be much superior when compared to bare chitosan and other conventional films...
April 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28097249/application-of-a-3d-custom-printed-patient-specific-spinal-implant-for-c1-2-arthrodesis
#5
Kevin Phan, Alessandro Sgro, Monish M Maharaj, Paul D'Urso, Ralph J Mobbs
The study aims to describe a three-dimensional printed (3DP) posterior fixation implant used for C1/C2 fusion in a 65-year-old female. Spinal fusion remains a common intervention for a range of spinal pathologies including degenerative disc and facet disease when conservative methods are unsuccessful. However, fusion devices are not always entirely efficacious in providing the desired fixation, and surgeons rely on 'off the shelf' implants which may not provide an anatomical fit to address the particular pathology...
December 2016: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28096831/predeployed-aortic-extension-cuff-kilt-in-evar-with-hostile-neck-anatomy-using-endurant-ii-system-preliminary-results
#6
Krzysztof Szaniewski, Magdalena Biernacka, Ryszard L Walas, Marian Zembala
INTRODUCTION: Various modifications of standard endovascular aortic aneurysm repair (EVAR) have been developed to solve the problem of difficult neck anatomy. AIM: The authors propose the implantation of a predeployed extension cuff (kilt) using on-shelf Endurant II elements. In a vast majority of cases, the proposed method provides a solution for the hostile neck problem using standard Endurant II elements available in all centers performing subrenal EVAR procedures...
December 2016: Kardiochirurgia i Torakochirurgia Polska, Polish Journal of Cardio-Thoracic Surgery
https://www.readbyqxmd.com/read/28042763/anatomical-suitability-of-the-zenith-off-the-shelf-p-branch-endograft-in-juxtarenal-aortic-aneurysms-previously-treated-using-the-chimney-technique
#7
Martin Schroeder, Konstantinos P Donas, Konstantinos Stavroulakis, Arne Stachmann, Giovanni Torsello, Theodosios Bisdas
PURPOSE: To examine the suitability of the Zenith off-the-shelf (p-branch) endograft in patients with juxta- or pararenal abdominal aortic aneurysms (J/PRAA) previously treated with endovascular aneurysm repair incorporating the chimney technique (chEVAR). METHODS: Between January 2012 and December 2014, high-resolution computed tomography angiograms and clinical data from 50 patients (mean age 79 years; 45 men) with J/PRAAs treated with chEVAR were retrospectively reviewed...
December 1, 2016: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/28009947/root-replacement-for-graft-infection-using-an-all-biologic-xenopericardial-conduit
#8
Sabina P W Guenther, Angela Reichelt, Sven Peterss, Maximilian Luehr, Erik Bagaev, Christian Hagl, Maximilian A Pichlmaier, Nawid Khaladj
BACKGROUND: The management of graft infection following ascending aortic replacement (AAR) and/or aortic valve replacement (AVR) with destruction of the root remains a challenge. Besides technical issues, the choice of graft material is controversial. The study aim was to investigate the initial results of aortic root replacement (ARR) as redo-surgery for infection using the xenopericardial all-biologic conduit (BioIntegral) as an alternative to a homograft or prosthetic material. METHODS: Between February 2013 and January 2015, a total of 18 consecutive patients (16 males, two females; mean age 61 ± 14 years) were reoperated on for infection at a mean of 55 ± 61 months (range: 3 to 219 months) following previous AVR (n = 6), supracoronary aortic replacement (SAR, n = 2), AVR + SAR (n = 1), root replacement (n = 7), and root reconstruction (n = 2)...
July 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28004610/endogenous-level-of-acetic-acid-in-yellowfin-tuna-thunnus-albacares-a-pilot-study-about-a-possible-controversy-on-its-residue-nature
#9
Luca Maria Chiesa, Elisa Pasquale, Sara Panseri, Domenico Britti, Renato Malandra, Roberto Villa, Francesco Arioli
A method based on headspace solid-phase microextraction (HS-SPME) followed by GC-MS analysis was developed for the determination of underivatised acetic acid in fresh tuna fish muscle. Parameters such as the fibre selected and the extraction time and temperature were optimised and the linearity, detection limits and precision of the whole analytical procedure were assessed. The method was then applied to determine the acetic acid concentration in fresh yellowfin tuna muscles (Thunnus albacares) in order to evaluate the endogenous level and its variations during the shelf life under different storage conditions...
March 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27989342/comparison-of-suture-based-anchors-and-traditional-bioabsorbable-anchors-in-foot-and-ankle-surgery
#10
W Chad Hembree, Michael A Tsai, Brent G Parks, Stuart D Miller
We compared the pullout strength of a suture-based anchor versus a bioabsorbable anchor in the distal fibula and calcaneus and evaluated the relationship between bone mineral density and peak load to failure. Eight paired cadaveric specimens underwent a modified Broström procedure and Achilles tendon reattachment. The fibula and calcaneus in the paired specimens received either a suture-based anchor or a bioabsorbable suture anchor. The fibular and calcaneal specimens were loaded to failure, defined as a substantial decrease in the applied load or pullout from the bone...
January 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/27979084/recent-advances-on-determination-of-milk-adulterants
#11
REVIEW
Carina F Nascimento, Poliana M Santos, Edenir Rodrigues Pereira-Filho, Fábio R P Rocha
Milk adulteration is a current fraudulent practice to mask the quality parameters (e.g. protein and fat content) and increase the product shelf life. Milk adulteration includes addition of toxic substances, such as formaldehyde, hydrogen peroxide, hypochlorite, dichromate, salicylic acid, melamine, and urea. In order to assure the food safety and avoid health risks to consumers, novel analytical procedures have been proposed for detection of these adulterants. The innovations encompass sample pretreatment and improved detection and data processing, including chemometric tools...
April 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27906783/evaluation-of-the-potential-optical-radiation-hazards-with-led-lamps-intended-for-home-use
#12
Robert H James, Robert J Landry, Bennett N Walker, Ilko K Ilev
The authors evaluated the potential for ocular damage from optical radiation emitted by Light Emitting Diode (LED) based lamps used for general illumination. Ten LED lamps were randomly selected off the shelf from a local home improvement store. The LEDs were behind diffusers in half of these lamps, while in the other half, the LEDs were clearly visible. In addition, a battery powered LED lantern having a LED source behind a diffuser was measured. The optical radiation emissions from two common incandescent lamps were also measured to compare the relative hazards of LED and incandescent lamps...
January 2017: Health Physics
https://www.readbyqxmd.com/read/27903485/endovascular-repair-of-thoraco-abdominal-aortic-aneurysm-in-high-surgical-risk-patients-fenestrated-and-branched-endografts
#13
E Gallitto, M Gargiulo, A Freyrie, C Bianchini Massoni, R Pini, C Mascoli, G L Faggioli, S Ancetti, A Stella
AIM: To report early and mid-term results of endovascular repair of thoraco-abdominal aneurysms (TAAA) by using of Cook-Zenith fenestrated/branched endografts (FB-EVAR) in high-surgical risk patients unfit for open repair (OR). METHODS: Between January 2012 and April 2015, all the patients with TAAA, considered at high-surgical risk for OR and treated by Cook-Zenith FB-EVAR, were prospectively enrolled. Patients were studied using a thoraco-abdominal computer tomography angiography (CTA) and dedicated software for advanced vessels analysis...
November 26, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27879687/images-from-bits-non-iterative-image-reconstruction-for-quanta-image-sensors
#14
Stanley H Chan, Omar A Elgendy, Xiran Wang
A quanta image sensor (QIS) is a class of single-photon imaging devices that measure light intensity using oversampled binary observations. Because of the stochastic nature of the photon arrivals, data acquired by QIS is a massive stream of random binary bits. The goal of image reconstruction is to recover the underlying image from these bits. In this paper, we present a non-iterative image reconstruction algorithm for QIS. Unlike existing reconstruction methods that formulate the problem from an optimization perspective, the new algorithm directly recovers the images through a pair of nonlinear transformations and an off-the-shelf image denoising algorithm...
November 22, 2016: Sensors
https://www.readbyqxmd.com/read/27872012/biomimetic-collagen-elastin-meshes-for-ventral-hernia-repair-in-a-rat-model
#15
Silvia Minardi, Francesca Taraballi, Xin Wang, Fernando J Cabrera, Jeffrey L Van Eps, Andrew B Robbins, Monica Sandri, Michael R Moreno, Bradley K Weiner, Ennio Tasciotti
: Ventral hernia repair remains a major clinical need. Herein, we formulated a type I collagen/elastin crosslinked blend (CollE) for the fabrication of biomimetic meshes for ventral hernia repair. To evaluate the effect of architecture on the performance of the implants, CollE was formulated both as flat sheets (CollE Sheets) and porous scaffolds (CollE Scaffolds). The morphology, hydrophylicity and in vitro degradation were assessed by SEM, water contact angle and differential scanning calorimetry, respectively...
November 18, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27856021/interdisciplinary-development-of-an-improved-emergency-department-procedural-work-surface-through-iterative-design-and-use-testing-in-simulated-and-clinical-environments
#16
Xiao C Zhang, Ana M Bermudez, Pranav M Reddy, Ravi R Sarpatwari, Darin B Chheng, Taylor J Mezoian, Victoria R Schwartz, Quinneil J Simmons, Gregory D Jay, Leo Kobayashi
STUDY OBJECTIVE: A stable and readily accessible work surface for bedside medical procedures represents a valuable tool for acute care providers. In emergency department (ED) settings, the design and implementation of traditional Mayo stands and related surface devices often limit their availability, portability, and usability, which can lead to suboptimal clinical practice conditions that may affect the safe and effective performance of medical procedures and delivery of patient care...
November 14, 2016: Annals of Emergency Medicine
https://www.readbyqxmd.com/read/27828848/lateral-shelf-acetabuloplasty-for-severe-legg-calv%C3%A3-perthes-disease-in-patients-older-than-8-years-a-mean-eleven-year-follow-up
#17
Wen-Chao Li, Rui-Jiang Xu
The natural history of Legg-Calvé-Perthes disease (LCPD) in children older than 8 years is usually poor without treatment. The treatment goal is to prevent deformity and incongruity of the hip by achieving a stable spherical femoral head in a deep, congruent, sharp-edged acetabulum, with a good range of hip movement at skeletal maturity. Lateral shelf acetabuloplasty in LCPD can increase the coverage of the femoral head, benefiting the remodeling of the femoral head and acetabulum. The aim of this study was to evaluate the efficacy of lateral shelf acetabuloplasty for severe LCPD in patients older than 8 years...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27765254/dairy-products-and-the-maillard-reaction-a-promising-future-for-extensive-food-characterization-by-integrated-proteomics-studies
#18
REVIEW
Simona Arena, Giovanni Renzone, Chiara D'Ambrosio, Anna Maria Salzano, Andrea Scaloni
Heating of milk and dairy products is done using various technological processes with the aim of preserving microbiological safety and extending shelf-life. These treatments result in chemical modifications in milk proteins, mainly generated as a result of the Maillard reaction. Recently, different bottom-up proteomic methods have been applied to characterize the nature of these structural changes and the modified amino acids in model protein systems and/or isolated components from thermally-treated milk samples...
March 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27706094/3d-printed-dry-eeg-electrodes
#19
Sammy Krachunov, Alexander J Casson
Electroencephalography (EEG) is a procedure that records brain activity in a non-invasive manner. The cost and size of EEG devices has decreased in recent years, facilitating a growing interest in wearable EEG that can be used out-of-the-lab for a wide range of applications, from epilepsy diagnosis, to stroke rehabilitation, to Brain-Computer Interfaces (BCI). A major obstacle for these emerging applications is the wet electrodes, which are used as part of the EEG setup. These electrodes are attached to the human scalp using a conductive gel, which can be uncomfortable to the subject, causes skin irritation, and some gels have poor long-term stability...
October 2, 2016: Sensors
https://www.readbyqxmd.com/read/27687323/midterm-results-from-a-physician-sponsored-investigational-device-exemption-clinical-trial-evaluating-physician-modified-endovascular-grafts-for-the-treatment-of-juxtarenal-aortic-aneurysms
#20
Benjamin W Starnes, Rachel E Heneghan, Billi Tatum
OBJECTIVE: The objective of this study was to report midterm results of an ongoing physician-sponsored investigational device exemption pivotal clinical trial using physician-modified endovascular grafts (PMEGs) for treatment of patients with juxtarenal aortic aneurysms who are deemed unfit for open repair. METHODS: Data from a nonrandomized, prospective, consecutively enrolling investigational device exemption clinical trial were used. Data collection began on April 1, 2011, and data lock occurred on May 31, 2015, with outcomes analysis through December 31, 2015...
February 2017: Journal of Vascular Surgery
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