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https://www.readbyqxmd.com/read/28342351/the-impact-of-well-field-configuration-and-permeability-heterogeneity-on-contaminant-mass-removal-and-plume-persistence
#1
Zhilin Guo, Mark L Brusseau
The purpose of this study is to investigate the effects of well-field hydraulics and permeability heterogeneity on mass-removal efficiency for systems comprising large groundwater contaminant plumes. A three-dimensional (3D) numerical model was used to simulate the impact of different well-field configurations on pump-and-treat mass removal for heterogeneous domains. The relationship between reduction in contaminant mass discharge (CMDR) and mass removal (MR) was used as the metric to examine remediation efficiency...
March 8, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28338540/occupational-contact-dermatitis-in-north-american-print-machine-operators-referred-for-patch-testing-retrospective-analysis-of-cross-sectional-data-from-the-north-american-contact-dermatitis-group-1998-to-2014
#2
Erin M Warshaw, Solveig L Hagen, Donald V Belsito, Joel G DeKoven, Howard I Maibach, C G Toby Mathias, Kathryn A Zug, Denis Sasseville, Matthew J Zirwas, Joseph F Fowler, Anthony F Fransway, Vincent A DeLeo, James G Marks, Melanie D Pratt, James S Taylor
BACKGROUND: Little is known about the epidemiology of contact dermatitis (CD) in print machine operators (PMOs). OBJECTIVE: The aims of this study were to estimate the prevalence of CD and characterize clinically relevant and occupationally related allergens among PMOs undergoing patch testing. METHODS: This was a retrospective cross-sectional analysis of the North American Contact Dermatitis Group data from 1998 to 2014. RESULTS: Of 39,332 patch-tested patients, 132 (0...
March 23, 2017: Dermatitis
https://www.readbyqxmd.com/read/28333179/obtaining-antibiotics-online-from-within-the-uk-a-cross-sectional-study
#3
Sara Elizabeth Boyd, Luke Stephen Prockter Moore, Mark Gilchrist, Ceire Costelloe, Enrique Castro-Sánchez, Bryony Dean Franklin, Alison Helen Holmes
Background: Improved antibiotic stewardship (AS) and reduced prescribing in primary care, with a parallel increase in personal internet use, could lead citizens to obtain antibiotics from alternative sources online. Objectives: A cross-sectional analysis was performed to: (i) determine the quality and legality of online pharmacies selling antibiotics to the UK public; (ii) describe processes for obtaining antibiotics online from within the UK; and (iii) identify resulting AS and patient safety issues...
February 17, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28331142/usefulness-of-color-coding-resected-samples-from-a-pancreaticoduodenectomy-with-tissue-marking-dyes-for-a-detailed-examination-of-surgical-margin-surrounding-the-uncinate-process-of-the-pancreas
#4
Satoshi Mizutani, Hideyuki Suzuki, Takayuki Aimoto, Seiji Yamagishi, Keisuke Mishima, Masanori Watanabe, Yasuhiko Kitayama, Norio Motoda, Saiko Isshiki, Eiji Uchida
BACKGROUND: Characteristics of a cancer-positive margin around a resected uncinate process of the pancreas (MUP) due to a pancreticoduodenectomy are difficult to understand by standardized evaluation because of its complex anatomy. The purposes of this study were to subclassify the MUP with tissue marking dyes of different colors and to identify the characteristics of sites that showed positivity for cancer cells in patients with pancreatic head carcinoma who underwent circumferential superior mesenteric arterial nerve plexus-preserving pancreaticoduodenectomy...
2017: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
https://www.readbyqxmd.com/read/28328634/bridging-the-gap-engineered-porcine-derived-urinary-bladder-matrix-conduits-as-a-novel-scaffold-for-peripheral-nerve-regeneration
#5
Lyly Nguyen, Ashkan Afshari, Nathaniel D Kelm, Alonda C Pollins, R Bruce Shack, Mark D Does, Wesley P Thayer
PURPOSE: This study aims to compare engineered nerve conduits constructed from porcine-derived urinary bladder matrix (UBM) with the criterion-standard nerve autografts, for segmental loss peripheral nerve repairs. METHODS: Forty-eight Sprague-Dawley rats were divided into 2 groups. All underwent a 10-mm sciatic nerve gap injury. This was repaired using either (1) reverse autograft-the 10-mm cut segment was oriented 180 degrees and used to coapt the proximal and distal stumps or (2) UBM conduit-the 10-mm nerve gap was bridged with UBM conduit...
March 21, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28321296/improving-surgical-and-anaesthesia-practice-review-of-the-use-of-the-who-safe-surgery-checklist-in-felege-hiwot-referral-hospital-ethiopia
#6
Ryan Ellis, Ahmad Izzuddin Mohamad Nor, Iona Pimentil, Zebenaye Bitew, Jolene Moore
Development of surgical and anaesthetic care globally has been consistently reported as being inadequate. The Lancet Commission on Global Surgery highlights the need for action to address this deficit. One such action to improve global surgical safety is the introduction of the WHO Surgical Checklist to Operating Rooms (OR) around the world. The checklist has a growing body of evidence supporting its ability to assist in the delivery of safe anaesthesia and surgical care. Here we report the introduction of the Checklist to a major Ethiopian referral hospital and low-resource setting and highlight the success and challenges of its implementation over a one year period...
2017: BMJ Quality Improvement Reports
https://www.readbyqxmd.com/read/28314955/outcome-of-descemet-stripping-automated-endothelial-keratoplasty-in-eyes-with-an-ahmed-glaucoma-valve
#7
Patrick J Chiam, Robert Cheeseman, Vivian W Ho, Vito Romano, Anshoo Choudhary, Mark Batterbury, Stephen B Kaye, Colin E Willoughby
PURPOSE: The purpose was to investigate the survival of Descemet stripping automated endothelial keratoplasty (DSAEK) in eyes with an Ahmed glaucoma valve (AGV). METHODS: The study had a retrospective case-series of patients with an AGV in the anterior chamber undergoing a DSAEK. Included in the analysis were graft size, number of previous operations, post-operative glaucoma medications, post-operative intraocular pressure (IOP) control, graft size and donor factors (age, endothelial cell density, and post-mortem time)...
March 17, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28314726/global-distribution-patterns-and-pangenomic-diversity-of-the-candidate-phylum-latescibacteria-ws3
#8
Ibrahim F Farag, Noha H Youssef, Mostafa S Elshahed
We investigated the global distribution patterns and pangenomic diversity of the candidate phylum "Latescibacteria" (WS3) in 16S rRNA gene as well as metagenomic datasets. We document distinct distribution patterns for various "Latescibacteria" orders in 16S rRNA gene datasets, with prevalence of orders sediment_1 in terrestrial, PBSIII_9 in groundwater and temperate freshwater, and GN03 in pelagic marine, saline-hypersaline, and wastewater habitats. Using a fragment recruitment approach, we identified 68.9 Mb of "Latescibacteria"-affiliated contigs in publicly available metagenomic datasets comprising 73,079 proteins...
March 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28297577/surgical-excision-of-heterotopic-ossification-leads-to-re-emergence-of-mesenchymal-stem-cell-populations-responsible-for-recurrence
#9
Shailesh Agarwal, Shawn Loder, David Cholok, John Li, Chris Breuler, James Drake, Cameron Brownley, Joshua Peterson, Shuli Li, Benjamin Levi
Trauma-induced heterotopic ossification (HO) occurs after severe musculoskeletal injuries and burns, and presents a significant barrier to patient rehabilitation. Interestingly, the incidence of HO significantly increases with repeated operations and after resection of previous HO. Treatment of established heterotopic ossification is challenging because surgical excision is often incomplete, with evidence of persistent heterotopic bone. As a result, patients may continue to report the signs or symptoms of HO, including chronic pain, nonhealing wounds, and joint restriction...
March 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28297072/operational-failures-detected-by-frontline-acute-care-nurses
#10
Kathleen R Stevens, Eileen P Engh, Heather Tubbs-Cooley, Deborah Marks Conley, Tammy Cupit, Ellen D'Errico, Pam DiNapoli, Joleen Lynn Fischer, Ruth Freed, Anne Marie Kotzer, Carolyn L Lindgren, Marie Ann Marino, Lisa Mestas, Jessica Perdue, Rebekah Powers, Patricia Radovich, Karen Rice, Linda P Riley, Peri Rosenfeld, Linda Roussel, Nancy A Ryan-Wenger, Linda Searle-Leach, Nicole M Shonka, Vicki L Smith, Laura Sweatt, Mary Townsend-Gervis, Ellen Wathen, Janice S Withycombe
Frontline nurses encounter operational failures (OFs), or breakdowns in system processes, that hinder care, erode quality, and threaten patient safety. Previous research has relied on external observers to identify OFs; nurses have been passive participants in the identification of system failures that impede their ability to deliver safe and effective care. To better understand frontline nurses' direct experiences with OFs in hospitals, we conducted a multi-site study within a national research network to describe the rate and categories of OFs detected by nurses as they provided direct patient care...
March 15, 2017: Research in Nursing & Health
https://www.readbyqxmd.com/read/28286397/perforator-peroneal-artery-flap-for-tongue-reconstruction
#11
Shubhra Chauhan, Sachin Chavre, Naveen Hedne Chandrashekar, Naveen B S
INTRODUCTION: Reconstruction has evolved long way from primary closure to flaps. As time evolved, better understanding of vascularity of flap has led to the development of innovative reconstructive techniques. These flaps can be raised from various parts of the body for reconstruction and have shown least donor site morbidity. We use one such peroneal artery perforator flap for tongue reconstruction with advantage of thin pliable flap, minimal donor site morbidity and hidden scar. MATERIALS AND METHODS: Our patient 57yrs old lady underwent wide local excision with selective neck dissection...
March 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28254773/pharyngeal-peristaltic-pressure-variability-operational-range-and-functional-reserve
#12
Mark K Kern, Gokulakrishnan Balasubramanian, Patrick Sanvanson, Dilpesh Agrawal, Ashley Wuerl, Reza Shaker
BACKGROUND: Current understanding of pharyngeal motor function remains incomplete. Among the remaining gaps of knowledge in this regard is the magnitude of variability of pharyngeal peristaltic pressure amplitude. While variability can pose difficulty in interpretation of manometric findings its magnitude can inform the operational range and reserve of the pharyngeal contractile function, Aims: To define the intra-, inter-subject and inter-session variability of select pharyngeal manometric parameters and, using this information, determine the number of swallow repetitions for acquiring reliable pharyngeal manometric data...
March 2, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28254373/dosing-antibiotic-prophylaxis-during-cardiopulmonary-bypass-a-higher-level-of-complexity-a-structured-review
#13
REVIEW
Fathima Paruk, Fekade B Sime, Jeffrey Lipman, Jason A Roberts
In highly invasive procedures such as open heart surgery, the risk of post-operative infection is particularly high due to exposure of the surgical field to multiple foreign devices. Adequate antibiotic prophylaxis is an essential intervention to minimise post-operative morbidity and mortality. However, there is a lack of clear understanding on the adequacy of traditional prophylactic dosing regimens, which are rarely supported by data. The aim of this structured review is to describe the relevant pharmacokinetic/pharmacodynamic (PK/PD) considerations for optimal antibiotic prophylaxis for major cardiac surgery including cardiopulmonary bypass (CPB)...
February 27, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28249654/transoral-robotic-surgery-for-management-of-cervical-unknown-primary-squamous-cell-carcinoma-updates-on-efficacy-surgical-technique-and-margin-status
#14
Mathew Geltzeiler, Sean Doerfler, Meghan Turner, William Greer Albergotti, Mark Kubik, Seungwon Kim, Robert Ferris, Umamaheswar Duvvuri
IMPORTANCE: Management of cervical unknown primary squamous cell carcinoma (CUP) has evolved with the introduction of transoral robotic surgery (TORS). OBJECTIVES: 1. To describe the efficacy of TORS lingual and palatine tonsillectomy in identifying the primary site of malignancy. 2. To explore how the extent of surgery affects diagnostic yield. 3. To report margin status of TORS resections. DESIGN, SETTING AND PARTICIPANTS: A retrospective, single-center cohort study utilizing a prospectively collected database of CUP patients in a high-volume tertiary referral center...
March 2017: Oral Oncology
https://www.readbyqxmd.com/read/28248041/-urinary-bladder-substitution-using-combined-membrane-based-on-secretions-of-human-mesenchymal-stem-cells-and-type-i-collagen
#15
V I Kirpatovckii, D M Kamalov, A Yu Efimenko, P I Makarevich, G D Sagaradze, O A Makarevich, P P Nimiritskii, E O Osidak, S P Domogatskii, V K Karpov, Z H A Akopyan, V A Tkachuk, A A Kamalov
AIM: Despite the widespread use of intestinal cystoplasty, urinary bladder substitution remains a challenging problem due to the complexity of operations and the potentially high risk of complications. A promising alternative may be bio-engineered collagen-based matrices containing stem cells or their secretions. MATERIAL AND METHODS: To evaluate the effectiveness of this bladder substitution modality, an experiment was conducted on 14 male rabbits. The animals underwent resection of urinary bladder, and the formed defect was substituted with a membrane of type I collagen (series 1, 5 rabbits) or a membrane of the same composition containing a conditioned medium with secretion of mesenchymal stem/stromal cells derived from human adipose tissue (series 2, 5 rabbits)...
December 2016: Urologii︠a︡
https://www.readbyqxmd.com/read/28241234/laparoscopic-total-pancreatectomy-with-islet-autotransplantation-and-intraoperative-islet-separation-as-a-treatment-for-patients-with-chronic-pancreatitis
#16
Caleb J Fan, Kenzo Hirose, Christi M Walsh, Michael Quartuccio, Niraj M Desai, Vikesh K Singh, Rita R Kalyani, Daniel S Warren, Zhaoli Sun, Marie N Hanna, Martin A Makary
Importance: Pain management of patients with chronic pancreatitis (CP) can be challenging. Laparoscopy has been associated with markedly reduced postoperative pain but has not been widely applied to total pancreatectomy with islet autotransplantation (TPIAT). Objective: To examine the feasibility of using laparoscopic TPIAT (L-TPIAT) in the treatment of CP. Design, Setting, and Participants: Thirty-two patients with CP presented for TPIAT at a tertiary hospital from January 1, 2013, through December 31, 2015...
February 22, 2017: JAMA Surgery
https://www.readbyqxmd.com/read/28235969/how-do-organisational-characteristics-influence-teamwork-and-service-delivery-in-lung-cancer-diagnostic-assessment-programmes-a-mixed-methods-study
#17
Gladys N Honein-AbouHaidar, Terri Stuart-McEwan, Tom Waddell, Alexandra Salvarrey, Jennifer Smylie, Mark J Dobrow, Melissa C Brouwers, Anna R Gagliardi
OBJECTIVES: Diagnostic assessment programmes (DAPs) can reduce wait times for cancer diagnosis, but optimal DAP design is unknown. This study explored how organisational characteristics influenced multidisciplinary teamwork and diagnostic service delivery in lung cancer DAPs. DESIGN: A mixed-methods approach integrated data from descriptive qualitative interviews and medical record abstraction at 4 lung cancer DAPs. Findings were analysed with the Integrated Team Effectiveness Model...
February 23, 2017: BMJ Open
https://www.readbyqxmd.com/read/28219340/very-high-mhc-class-iib-diversity-without-spatial-differentiation-in-the-mediterranean-population-of-greater-flamingos
#18
Mark A F Gillingham, Arnaud Béchet, Alexandre Courtiol, Manuel Rendón-Martos, Juan A Amat, Boudjéma Samraoui, Ortaç Onmuş, Simone Sommer, Frank Cézilly
BACKGROUND: Selective pressure from pathogens is thought to shape the allelic diversity of major histocompatibility complex (MHC) genes in vertebrates. In particular, both local adaptation to pathogens and gene flow are thought to explain a large part of the intraspecific variation observed in MHC allelic diversity. To date, however, evidence that adaptation to locally prevalent pathogens maintains MHC variation is limited to species with limited dispersal and, hence, reduced gene flow...
February 20, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28216124/the-pattern-and-degree-of-capsular-fibrous-sheaths-surrounding-cochlear-electrode-arrays
#19
Reuven Ishai, Barbara S Herrmann, Joseph B Nadol, Alicia M Quesnel
An inflammatory tissue reaction around the electrode array of a cochlear implant (CI) is common, in particular at the electrode insertion region (cochleostomy) where mechanical trauma often occurs. However, the factors determining the amount and causes of fibrous reaction surrounding the stimulating electrode, especially medially near the perimodiolar location, are unclear. Temporal bone (TB) specimens from patients who had undergone cochlear implantation during life with either Advanced Bionics (AB) Clarion (TM) or HiRes90K(TM) (Sylmar, CA, USA) devices that have a half-band and a pre-curved electrode, or Cochlear (TM) Nucleus (Sydney, Australia) device that have a full-band and a straight electrode were evaluated...
February 16, 2017: Hearing Research
https://www.readbyqxmd.com/read/28214485/outcome-of-peripheral-venous-reconstructions-during-tumor-resection
#20
Philip Y Sun, Mark D Fleming, Kendall Stauffer, Manju Kalra, Gustavo Oderich, Thomas Bower, Peter Gloviczki, Randall R DeMartino
OBJECTIVE: Peripheral venous reconstruction surgery may be necessary for appropriate oncologic resection; however, the operative approach and surgical outcomes are not well described. We report our experience with these complex reconstructions to identify best practice. METHODS: We retrospectively reviewed all adult patients who underwent peripheral vein reconstruction for tumor resection at Mayo Clinic, Rochester (2000-2015). Patients were classified into three subgroups by the location: iliac (IL), lower extremity (LE), and upper extremity (UE)...
March 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
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