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https://www.readbyqxmd.com/read/28149702/metagenomic-identification-of-active-methanogens-and-methanotrophs-in-serpentinite-springs-of-the-voltri-massif-italy
#1
William J Brazelton, Christopher N Thornton, Alex Hyer, Katrina I Twing, August A Longino, Susan Q Lang, Marvin D Lilley, Gretchen L Früh-Green, Matthew O Schrenk
The production of hydrogen and methane by geochemical reactions associated with the serpentinization of ultramafic rocks can potentially support subsurface microbial ecosystems independent of the photosynthetic biosphere. Methanogenic and methanotrophic microorganisms are abundant in marine hydrothermal systems heavily influenced by serpentinization, but evidence for methane-cycling archaea and bacteria in continental serpentinite springs has been limited. This report provides metagenomic and experimental evidence for active methanogenesis and methanotrophy by microbial communities in serpentinite springs of the Voltri Massif, Italy...
2017: PeerJ
https://www.readbyqxmd.com/read/28139400/plantar-plate-repair-using-a-direct-plantar-approach-an-outcomes-analysis
#2
Mark A Prissel, Christopher F Hyer, Jacqueline K Donovan, Amanda L Quisno
Direct plantar plate repair using a plantar approach has been described previously, but with few reports of the outcomes or clinical results. The purpose of the present study was to determine the outcomes of this technique. We performed a retrospective analysis of patients who had undergone direct plantar plate repair with or without concomitant Weil osteotomy and a prospective patient-reported subjective outcomes analysis. Ultimately, 131 patients (144 toes) were included, and the response rate for the mailed surveys was 53...
January 27, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28048490/su-g-tep2-04-comprehensive-machine-isocenter-evaluation-with-separation-of-gantry-collimator-and-table-variables
#3
S Hancock, C Clements, D Hyer, E Nixon, E Martin, B Wang, S Jani, M Gossman
PURPOSE: To develop and demonstrate application of a method that characterizes deviation of linac x-ray beams from the centroid of the volumetric radiation isocenter as a function of gantry, collimator, and table variables. METHODS: A set of Winston-Lutz ball-bearing images was used to determine the gantry radiation isocenter as the midrange of deviation values resulting from gantry and collimator rotation. Also determined were displacement of table axis from gantry isocenter and recommended table axis adjustment...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048201/su-f-t-646-sbrt-lung-moving-beyond-the-3d-conformal-paradigm-with-an-elekta-versahd-accelerator
#4
A Dalhart, D Hyer, B Allen, R Flynn, H Johnston
PURPOSE: To develop a volumetric modulated arc therapy (VMAT) planning and delivery methodology for lung stereotactic body radiation therapy (SBRT) that addresses the unique geometric challenges presented when using an Elekta VersaHD linear accelerator. METHODS: The Elekta VersaHD imaging panels are fixed at 160cm SID when deployed, limiting the ability to perform non-coplanar treatments due to collisions with the treatment table. The panels can be folded in a stored position for non-coplanar treatments, but in this configuration, longitudinal table travel is restricted by the space required for the folded panels...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047942/su-f-t-298-the-impact-of-modeling-the-treatment-couch-on-patient-specific-vmat-qa
#5
E Gelover, A Dalhart, D Hyer
PURPOSE: The aim of this work is to quantify the impact of modeling the treatment couch on the passing rate of ion chamber measurements during VMAT quality assurance. METHODS: For the initial characterization, attenuation and surface dose measurements were performed following the guidelines of TG-176 for the Civco Universal couch top using an Elekta VersaHD accelerator at an energy of 6 MV. A simulation CT was performed to aid in the creation of contours for representing the shape and size of the couch top in the treatment planning system (TPS)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28027147/breaking-bad-news-in-the-high-concern-low-trust-setting-how-to-get-your-story-heard
#6
Randall N Hyer, Vincent T Covello
No abstract text is available yet for this article.
February 2017: Health Physics
https://www.readbyqxmd.com/read/27989339/anatomic-description-of-the-naviculocuneiform-articulation
#7
Kevin Renner, Jeffrey E McAlister, Melissa M Galli, Christopher F Hyer
The naviculocuneiform articulation is composed of the navicular proximally and the 3 cuneiforms distally. It is not uncommon to perform surgical interventions at this joint for multiple pathologic foot etiologies. To date, no detailed anatomic measurement is available for each cuneiform articulation on the navicular. The purpose of the present study was to present an anatomic description of this complex joint to aid in better surgical understanding and improve surgical outcomes. Ten fresh, frozen, and thawed below-the-knee cadaveric specimens were used for anatomic dissection of the navicular and associated cuneiforms...
January 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/27989336/a-review-of-399-total-ankle-replacements-analysis-of-ipsilateral-subtalar-joint-arthrodesis-and-associated-talar-component-subsidence
#8
Mark A Prissel, Christopher F Hyer, Gregory C Berlet
Total ankle replacement (TAR) is an accepted treatment for end-stage ankle arthritis. When concurrent subtalar joint pathologic features exist, ipsilateral subtalar joint arthrodesis (STJA) can be performed either simultaneous with TAR or as a staged procedure. Limited data exist on the effect of talar component subsidence and prosthesis survivorship. The present study purpose was to evaluate the effect of STJA on talar component subsidence after primary TAR and its effect on TAR survivorship. All patients, a minimum of 18 years old, from a single institution with modern-generation TAR and 1-year minimum follow-up data available were evaluated...
January 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/27866885/surgical-planning-for-flexor-digitorum-longus-tendon-transfers-an-anatomic-study
#9
Jeffrey E McAlister, Shyler L DeMill, Eric So, Christopher F Hyer
Posterior tibial tendon dysfunction is often coupled with various degrees of hindfoot valgus and equinus. Preoperative planning is essential to appropriate procedure choice and surgical efficiency. The purpose of the present study was to assess the anatomy at the harvest site for flexor digitorum longus tendon transfer, specifically at the master knot of Henry. Thirty fresh-frozen below-the-knee cadavers were used for dissection. A standard anatomic approach was performed for posterior tibial tendon debridement and flexor digitorum longus tendon transfer...
January 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/27832786/exploring-the-influence-of-short-term-temperature-patterns-on-temperature-related-mortality-a-case-study-of-melbourne-australia
#10
John L Pearce, Madison Hyer, Rob J Hyndman, Margaret Loughnan, Martine Dennekamp, Neville Nicholls
BACKGROUND: Several studies have identified the association between ambient temperature and mortality; however, several features of temperature behavior and their impacts on health remain unresolved. We obtain daily counts of nonaccidental all-cause mortality data in the elderly (65 + years) and corresponding meteorological data for Melbourne, Australia during 1999 to 2006. We then characterize the temporal behavior of ambient temperature development by quantifying the rates of temperature change during periods designated by pre-specified windows ranging from 1 to 30 days...
November 10, 2016: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/27692028/an-evaluation-of-the-cares%C3%A2-dementia-basics-program-among-caregivers
#11
Michelle L Pleasant, Victor Molinari, John V Hobday, Sam Fazio, Nancy Cullen, Kathryn Hyer
BACKGROUND: In 2014, the state of Oregon established Oregon Care Partners to provide high quality, free training to all dementia caregivers. This study evaluated participants' changes in knowledge, sense of competency in dementia caregiving, and ability to identify person-centered caregiving techniques after completing CARES® Dementia Basics online program, one of the educational resources available through this initiative. METHODS: A convenience sample of informal and formal caregivers (N = 51) provided data at three points in time; pre-test, post-test, and a follow-up test after an additional 30-day period to determine sustained changes in knowledge, sense of competency, and person-centered care...
January 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/27634954/comparison-of-venous-sinus-manometry-gradients-obtained-while-awake-and-under-general-anesthesia-before-venous-sinus-stenting
#12
Kyle M Fargen, Alejandro M Spiotta, Madison Hyer, Jonathan Lena, Raymond D Turner, Aquilla S Turk, Imran Chaudry
INTRODUCTION: Venous sinus stenting is a popular treatment strategy for patients with high venous sinus pressure gradients across a site of outflow obstruction. Little is known about the effect of anesthesia on venous sinus pressure measurements. OBJECTIVE: To compare venous manometry performed in patients under general anesthesia and while awake. METHODS: A prospective database was accessed to retrospectively identify patients who had undergone venous sinus stenting...
September 15, 2016: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/27613816/arthroscopic-evaluation-of-syndesmotic-instability-and-malreduction
#13
Douglas E Lucas, B Collier Watson, G Alex Simpson, Gregory C Berlet, Christopher F Hyer
: Ankle fractures are a common injury treated by orthopaedic surgeons. The distal tibiofibular syndesmosis can be injured during these fractures as well as in isolation. They pose a significant challenge with regard to the diagnosis of instability as well as evaluating reduction after fixation. Multiple studies have demonstrated that traditional radiographic analysis fails to accurately identify syndesmotic diastasis, instability, or malreduction. Ankle arthroscopy has been proposed as an alternative way to evaluate the syndesmosis...
September 9, 2016: Foot & Ankle Specialist
https://www.readbyqxmd.com/read/27613811/distraction-first-metatarsophalangeal-arthrodesis-with-tricortical-calcaneus-autograft-technique-tips
#14
Jeffrey E McAlister, Christopher F Hyer, Trevor E Black
: First metatarsophalangeal joint arthritis can stem from a biomechanical imbalance as in hallux abducto valgus, metabolic arthritidies such as rheumatoid or gout, and even in posttraumatic cases. Advanced arthritis in the foot and ankle can often become debilitating. Surgical intervention is often necessary. Revision of failed first metatarsophalangeal joint arthroplasty is often in the setting of bony erosion and lysis, cystic changes, and loss of bone stock. In this article, we describe first metatarsophalangeal distraction arthrodesis technique using tricortical calcaneus autograft with the aim of simplifying donor site graft harvesting and decreasing donor site morbidity while attaining successful osseous union...
September 9, 2016: Foot & Ankle Specialist
https://www.readbyqxmd.com/read/27613793/use-of-clinical-decision-support-to-improve-primary-care-identification-and-management-of-chronic-kidney-disease-ckd
#15
Cara B Litvin, J Madison Hyer, Steven M Ornstein
BACKGROUND: Early detection of chronic kidney disease (CKD) can lead to interventions to prevent renal failure and reduce risk for cardiovascular disease, yet adherence to treatment goals is suboptimal in the primary care setting. The purpose of this study was to assess whether clinical decision support (CDS) can be used to improve the identification and management of CKD. METHODS: This 2 year demonstration study was conducted in 11 primary care PPRNet practices...
September 2016: Journal of the American Board of Family Medicine: JABFM
https://www.readbyqxmd.com/read/27554183/awakening-to-the-politics-of-food-politicized-diet-as-social-identity
#16
Chelsea Chuck, Samantha A Fernandes, Lauri L Hyers
In this qualitative study, the process of developing a politicized identity around diet was explored through a social psychological lens. Applying one of the most influencial models of group identity development proposed by Cross (1978) in which an "encounter" experience spurs an awakening into a politicized identity, we asked 36 participants who followed alternative diets due to political reasons to describe their unique encounter experiences that brought them to their politicized awakening. Their self-identified diets included pescetarian, vegetarian, vegan, raw, non-GMO/organic, and reduced meat consumption...
December 1, 2016: Appetite
https://www.readbyqxmd.com/read/27550306/impact-of-aspect-scores-and-infarct-distribution-on-outcomes-among-patients-undergoing-thrombectomy-for-acute-ischemic-stroke-with-the-adapt-technique
#17
John P Hungerford, Madison Hyer, Aquilla S Turk, Raymond D Turner, M Imran Chaudry, Kyle M Fargen, Alejandro M Spiotta
OBJECTIVE: To investigate the associations between Alberta Stroke Program Early CT Score (ASPECTS) or distribution and sidedness of acute infarction and clinical outcomes following intervention with a direct aspiration first pass technique (ADAPT). METHODS: A review was performed of patients who had undergone thrombectomy with ADAPT for emergent large vessel occlusions of the middle cerebral artery (MCA) between December 2012 and May 2015. Preintervention CT scans were reviewed by a blinded radiologist to calculate ASPECTS and determine the distribution of infarction...
August 22, 2016: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/27530983/clinical-adaptation-of-the-tibiofibular-line-for-intraoperative-evaluation-of-open-syndesmosis-reduction-accuracy-a-cadaveric-study
#18
Christopher W Reb, Christopher F Hyer, Christy L Collins, Corey M Fidler, B Collier Watson, Gregory C Berlet
BACKGROUND: The "tibiofibular line" is a new axial computed tomography parameter for assessing syndesmosis reduction, which references the flat anterolateral surface of the fibula and anterolateral tibial tubercle. These same bony landmarks are easily visualized via a lateral approach to the fibula. This cadaveric study assessed the practical aspects of measuring the tibiofibular line intraoperatively. METHODS: Three observers simulated the tibiofibular line using operative rulers in 3 measurement series utilizing 10 cadaveric specimens: intact syndesmosis, syndesmosis reduction, and fixation after application of lateral plate and screws to the fibula, and post syndesmosis reduction and fixation without plate and screws...
November 2016: Foot & Ankle International
https://www.readbyqxmd.com/read/27495837/gender-differences-in-mobility-device-use-among-u-s-older-adults
#19
Lindsay J Peterson, Hongdao Meng, Debra Dobbs, Kathryn Hyer
OBJECTIVES: Research has shown greater mobility limitations among women than men. We aimed to examine (a) gender differences in the use of canes for mobility and (b) what factors contribute to these differences under the frameworks of the disablement model and the Theory of Planned Behavior. METHOD: Using National Health and Aging Trends Study data, we estimated hierarchical logistic regression models to predict the likelihood of cane use among older adults who completed performance-based measures (n = 5,503)...
August 5, 2016: Journals of Gerontology. Series B, Psychological Sciences and Social Sciences
https://www.readbyqxmd.com/read/27487886/technical-note-a-treatment-plan-comparison-between-dynamic-collimation-and-a-fixed-aperture-during-spot-scanning-proton-therapy-for-brain-treatment
#20
Blake Smith, Edgar Gelover, Alexandra Moignier, Dongxu Wang, Ryan T Flynn, Liyong Lin, Maura Kirk, Tim Solberg, Daniel E Hyer
PURPOSE: To quantitatively assess the advantages of energy-layer specific dynamic collimation system (DCS) versus a per-field fixed aperture for spot scanning proton therapy (SSPT). METHODS: Five brain cancer patients previously planned and treated with SSPT were replanned using an in-house treatment planning system capable of modeling collimated and uncollimated proton beamlets. The uncollimated plans, which served as a baseline for comparison, reproduced the target coverage and organ-at-risk sparing of the clinically delivered plans...
August 2016: Medical Physics
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