Leaves as bottlenecks: The contribution of tree leaves to hydraulic resistance within the soil-plant-atmosphere continuum.

Within vascular plants, the partitioning of hydraulic resistance along the soil-to-leaf continuum affects transpiration and its response to environmental conditions. In trees, the fractional contribution of leaf hydraulic resistance (Rleaf ) to total soil-to-leaf hydraulic resistance (Rtotal ), or fRleaf (=Rleaf /Rtotal ), is thought to be large, but this has not been tested comprehensively. We compiled a multibiome data set of fRleaf using new and previously published measurements of pressure differences within trees in situ. Across 80 samples, fRleaf averaged 0.51 (95% confidence interval [CI] = 0.46-0.57) and it declined with tree height. We also used the allometric relationship between field-based measurements of soil-to-leaf hydraulic conductance and laboratory-based measurements of leaf hydraulic conductance to compute the average fRleaf for 19 tree samples, which was 0.40 (95% CI = 0.29-0.56). The in situ technique produces a more accurate descriptor of fRleaf because it accounts for dynamic leaf hydraulic conductance. Both approaches demonstrate the outsized role of leaves in controlling tree hydrodynamics. A larger fRleaf may help stems from loss of hydraulic conductance. Thus, the decline in fRleaf with tree height would contribute to greater drought vulnerability in taller trees and potentially to their observed disproportionate drought mortality.

Transitions in mental health and addiction care for youth and their families: a scoping review of needs, barriers, and facilitators.

INTRODUCTION: Transitional-aged youth (TAY) with mental health and/or addictions (MHA) concerns and their families experience significant challenges finding, accessing, and transitioning through needed MHA care. To develop appropriate supports that assist TAY and their families in navigating MHA care, their experiences of transitions in the MHA care system must be better understood. This scoping review identifies and explores the needs, barriers, and facilitators for TAY and their families when transitioning through MHA care. METHODS: This scoping review commenced with a search of five relevant databases. Three research team members were involved in title, abstract, and full-text scanning and data extraction. Sources focusing on TAY anywhere between the ages of 12-29 years and meeting the study objectives were included. Extractions compiled background and narrative information about the nature and extent of the data. Analysis and synthesis of findings involved numerical description of the general information extracted (e.g., numbers of sources by country) and thematic analysis of narrative information extracted (e.g., family involvement in TAY help-seeking). RESULTS: A total of 5894 sources were identified. Following title and abstract scanning, 1037 sources remained for full-text review. A total of 66 sources were extracted. Findings include background information about extracted sources, in addition to five themes that emerged pertaining to barriers and facilitators to access and transitions through care and the needs and roles of TAY and families in supporting help-seeking and care transitions: holistic supports, proactive preparation, empowering TAY and families, collaborative relationships, and systemic considerations. These five themes demonstrate approaches to care that can ensure TAY and families' needs are met, barriers are mitigated, and facilitators are enhanced. CONCLUSION: This review provides essential contextual information regarding TAY with MHA concerns and their families' needs when seeking care. Such findings lend to an enhanced understanding of how MHA programs can support this population's needs, involve family members as appropriate, reduce the barriers experienced, and work to build upon existing facilitators.

A novel method for measuring bowel motility and velocity with dynamic magnetic resonance imaging in two and three dimensions.

Increasingly, dynamic magnetic resonance imaging (MRI) has potential as a noninvasive and accessible tool for diagnosing and monitoring gastrointestinal motility in healthy and diseased bowel. However, current MRI methods of measuring bowel motility have limitations: requiring bowel preparation or long acquisition times; providing mainly surrogate measures of motion; and estimating bowel-wall movement in just two dimensions. In this proof-of-concept study we apply a method that provides a quantitative measure of motion within the bowel, in both two and three dimensions, using existing, vendor-implemented MRI pulse sequences with minimal bowel preparation. This method uses a minimised cost function to fit linear vectors in the spatial and temporal domains. It is sensitised to the spatial scale of the bowel and aims to address issues relating to the low signal-to-noise in high-temporal resolution dynamic MRI scans, previously compensated for by performing thick-slice (10-mm) two-dimensional (2D) coronal scans. We applied both 2D and three-dimensional (3D) scanning protocols in two healthy volunteers. For 2D scanning, analysis yielded bi-modal velocity peaks, with a mean antegrade motion of 5.5 mm/s and an additional peak at ~9 mm/s corresponding to longitudinal peristalsis, as supported by intraoperative data from the literature. Furthermore, 3D scans indicated a mean forward motion of 4.7 mm/s, and degrees of antegrade and retrograde motion were also established. These measures show promise for the noninvasive assessment of bowel motility, and have the potential to be tuned to particular regions of interest and behaviours within the bowel.

Early relational health: Innovations in child health for promotion, screening, and research.

Relational experiences during infancy and early childhood are key drivers for building health, social emotional development, and learning capacities, each vital for wellbeing. The U.S. child health sectors share a commitment to universal health promotion, prevention and early intervention, and a growing enthusiasm for the research-affirmed primacy of caregiver-child interactions during the critical first 1000 days of life. Given our nation's growing children's mental health crisis, racial justice awakening and the need to reimagine equitable supports for young families post-COVID19, the child health sectors seek new tools and clinical approaches that blend science-to-practice innovations with co-developed activities that are meaningful to families. This special section brings together papers about a journey of co-discovery between researchers, clinicians, and parents during the development and refinement of new video- and interview-based dyadic relational screening and monitoring tools. The collection of papers addresses a range of topics including early relational health (ERH), development and validation of the Early Relational Health Screen, its application within research and clinical settings, and thoughtful discussions from multiple perspectives. Informed by the diversity informed tenets, this journey highlights not only science-informed approaches, but also co-development with families of equitable approaches to understanding and serving children and their caregivers.

Las experiencias en las relaciones durante la infancia y la temprana niñez son conductores claves para fortalecer la salud, el desarrollo socio-emocional y las capacidades de aprendizaje, todas las cuales son vitales para el bienestar. Los sectores de salud infantil en los Estados Unidos comparten un compromiso para promover globalmente la salud, la prevención y la temprana intervención, así como un creciente entusiasmo por la primacía de las interacciones entre quien presta el cuidado y el niño, tal como las reafirma la investigación, durante los críticos primeros mil días de vida. Dada la creciente crisis de salud mental infantil de nuestro país, el despertar de la justicia racial y la necesidad de volver a conceptualizar los apoyos equitativos para familias jóvenes después del Covid-19, los sectores de salud infantil, buscan nuevas herramientas y acercamientos clínicos que mezclan las innovaciones de la ciencia a la práctica con actividades desarrolladas en conjunto que resultan significativas para las familias. Esta sección especial presenta artículos acerca de una trayectoria de descubrimiento en conjunto entre investigadores, profesionales clínicos y padres durante el desarrollo y afinamiento de nuevas herramientas de detección y supervisión de la relación diádica basadas en videos y entrevistas. El grupo de artículos aborda un número de temas que incluyen la temprana saludable relación (ERH), el desarrollo y la validez de la Detección de la Temprana Saludable Relación, su aplicación dentro de los campos de la investigación y clínicos, así como sensatas discusiones a partir de múltiples perspectivas. Respaldada por principios basados en la diversidad, esta trayectoria subraya no sólo los acercamientos cuya información proviene de la ciencia, sino también el desarrollo en conjunto con familias de equitativos acercamientos para comprender y servirles a los niños y a quienes los cuidan.

Les expériences relationnelles le bas âge et la petite enfance sont des facteurs clés pour la construction de la santé, le développement socio-émotionnel et les capacités d'apprentissage, qui sont indispensables au bien-être. Les secteurs de la santé de l'enfant aux Etats-Unis d'Amérique partagent un engagement envers la promotion universelle de la santé, la prévention et l'intervention précoce, et un enthousiasme grandissant pour la primauté des interactions personne prenant soin de l'enfant-enfant, affirmée par les recherches, durant les 100 premiers jours critique de la vie. Au vu de la croissance de la crise de santé mentale des enfants dans notre pays, du réveil de la justice raciale et du besoin de réimaginer les soutiens équitables pour les jeunes familles après le Covid19, les secteurs de la santé mentale de l'enfant cherchent de nouveaux outils et des approches cliniques qui mélange des innovations science-à-pratique avec des activités élaborées conjointement qui sont utiles et ont un sens pour les familles. Cette section spéciale rassemble des articles sur un voyage de codécouverte entre des chercheurs, des cliniciens, et des parents durant le développement et le perfectionnement d'un nouveau dépistage relationnel dyadique à partir d'entretiens et de vidéos, et d'outils de suivi. Cette collection d'articles porte sur un éventail de sujets y compris la Santé Relationnelle Précoce (SRP), le développement et la validation du Dépistage de Santé Relationnelle Précoce, son application dans des contextes de recherche et dans des contextes cliniques, et des discussions attentionnées de perspectives multiples. Informé par des principes fondés sur la diversité, ce voyage met en évidence non seulement des approches scientifiques mais aussi des co-développements avec des familles d'approches équitables à la compréhension et au service des enfants ainsi que des personnes prenant soin d'eux.

The context and development of the early relational health screen.

Early relational experiences are key drivers for developing social emotional capacities, educational achievement, mental health, physical health, and overall wellbeing. The child health sectors are committed to promotion, prevention, and early intervention that optimize children's health and development, often employing evidence-based screening as foundational practices. Despite a variety of validated parent-infant observational assessment tools, few are practical within busy practice settings, acceptable with all racial and ethnic groups and ready for universal adoption. In response to this need, a team of clinicians, early childhood educators, researchers and infant mental health specialists collaborated to develop and test a novel video-based, dyadic relational screening and monitoring tool, the Early Relational Health Screen (ERHS). This tool uniquely focuses on the early parent-child relationship (6-24 months), within the construct of early relational health (ERH). Initial testing demonstrated that the ERHS is a valid, reliable, feasible, and useful screening and monitoring tool for clinical applications. The ERHS was further developed within a population-based, prospective research study and adapted with brief video feedback for parents in the home visiting and child health sectors. The ERHS and its adaptations appear to advance ERH and equity within the transforming child health and public health care systems of today.

Las tempranas experiencias de relaciones afectivas son clave para desarrollar las capacidades socioemocionales, para los logros educativos, la salud mental, la salud física y el bienestar en general. Los sectores de salud infantil están comprometidos a promover, prevenir e intervenir a tiempo para que la salud de los niños y su desarrollo sean óptimos, a menudo empleando examinaciones basadas en la evidencia como prácticas fundamentales. A pesar de la variedad de válidas herramientas para la evaluación con base en la observación progenitor-infante, pocas son prácticas dentro del ocupado campo de la práctica, aceptables con todos los grupos raciales y étnicos, y pocas están listas para ser adoptadas en forma generalizada. Como respuesta a esta necesidad, un equipo formado por clínicos profesionales, educadores de la temprana niñez, investigadores y especialistas de la salud mental infantil colaboraron para desarrollar y probar una herramienta novedosa basada en videos, con el fin de examinar y darle seguimiento a la relación de la díada, el Examen del Bienestar de la Temprana Relación (ERHS). Esta herramienta de manera única se enfoca en la temprana relación progenitor-niño (6-24 meses), dentro del marco del temprano bienestar de la relación. La examinación inicial demostró que ERHS es una herramienta de examinación y seguimiento válida, confiable, posible y útil para la aplicación clínica. Entonces ERHS se desarrolló dentro de un estudio de investigación de probabilidades, con base en la población, y se adaptó con breves respuestas en video para progenitores en los sectores de visitas a casa y salud infantil. ERHS y sus adaptaciones parecen avanzar el temprano bienestar de la relación (ERH) y la equidad dentro de los sistemas de salud infantil y cuidado de salud pública en transformación hoy día.

Les expériences relationnelles sont des moteurs essentiels pour le développement des capacités socio-émotionnelles, la réussite scolaire, la santé mentale, la santé physique et le bien-être général. Les secteurs de la santé de l'enfant sont dédiés à la promotion, à la prévention et à l'intervention précoce qui optimisent la santé des enfants et leur développement, en employant souvent des dépistages fondés sur des données probantes en tant que pratiques fondamentales. En dépit d'une variété d'outils d'évaluation observationnelle parent-bébé validés, peu de ces outils sont pratique au sein d'un cabinet de pratique très occupé et peu sont acceptables pour tous groupes raciaux et éthiques ainsi que prêts pour une adoption universelle. Pour répondre à ce besoin une équipe de cliniciens, d'éducateurs de la petite enfance, de chercheurs et de spécialistes de la santé mentale du nourrisson ont collaboré afin de développer et de tester un outil innovateur et basé sur la vidéo de dépistage relationnel dyadique et de suivi, le Dépistage de Santé Relationnelle Précoce (en anglais Early Relational Health Screen dont nous gardons l'abréviation ici, ERHS). Cet outil se concentre uniquement sur la relation précoce parent-enfant (6-24 mois), dans le cadre de la construction de la santé relationnelle précoce. Les essais ont montré que l'ERHS est un outil de dépistage et de suivi valide, fiable, réalisable et utile pour les applications cliniques. L'ERHS a été plus profondément développé au sein d'une étude de recherches de prospection, basées sur certaines populations, et adapté avec de brefs commentaires vidéo pour les parents dans les secteurs des visites à domicile et de la santé de l'enfant. L'ERHS et ses adaptations semblent faire progresser la Santé Relationnelle Précoce et l'équité au sein des transformation de la santé de l'enfant et des systèmes de santé publique d'aujourd'hui.

Redesigning the Maternal, Infant and Early Childhood Home Visiting Program Performance Measurement System.

Objectives Statute for the Maternal, Infant and Early Childhood Home Visiting (MIECHV) Program requires that states and territories receiving Program funding assess improvements for participating families across six areas that address maternal and child well-being. In 2015, the MIECHV Program performance measurement system was redesigned to allow for national-level analyses and cross-grantee comparisons. The new measures were aligned with other federal performance measures to help ensure context for program analyses. The number of measures was also reduced to lessen reporting burden. This paper describes the redesign process and resulting national performance measures. Methods The redesign process included holding listening sessions with stakeholders and experts; reviewing the findings from other home visiting performance initiatives; consulting with experts; soliciting and responding to public comment on draft measures; seeking clearance from the Office of Management and Budget; and specifying each measure with detailed eligibility criteria, the timing and frequency of assessments, and the window for data collection. Results The redesign resulted in a set of 19 measures that all MIECHV-funded home visiting programs began collecting in 2016. This is nearly half the number of measures that MIECHV awardees had been reporting prior to the redesign. The measures are aligned with other federal measures, including those used in Healthy People 2020 and those used for other maternal and child health programs. Conclusions for Practice Data reported by MIECHV Program awardees will be used to assess their performance, identify areas for targeted technical assistance to support continuous improvement, and ensure meaningful impacts for at-risk families.

TOPGEAR: A Randomized, Phase III Trial of Perioperative ECF Chemotherapy with or Without Preoperative Chemoradiation for Resectable Gastric Cancer: Interim Results from an International, Intergroup Trial of the AGITG, TROG, EORTC and CCTG.

BACKGROUND: Postoperative chemoradiation and perioperative chemotherapy using epirubicin/cisplatin/5-fluorouracil (ECF) represent two standards of care for resectable gastric cancer. In the TOPGEAR (Trial Of Preoperative therapy for Gastric and Esophagogastric junction AdenocaRcinoma) trial, we hypothesized that adding preoperative chemoradiation to perioperative ECF will improve survival; however, the safety and feasibility of preoperative chemoradiation have yet to be determined. METHODS: TOPGEAR is an international phase III trial in which patients with adenocarcinoma of the stomach were randomized to perioperative ECF alone or with preoperative chemoradiation. The ECF-alone group received three preoperative cycles of ECF, while the chemoradiation group received two cycles of preoperative ECF followed by chemoradiation. Both groups received three postoperative cycles of ECF. A planned interim analysis of the first 120 patients was conducted, and was reviewed by the Independent Data Safety Monitoring Committee to assess treatment compliance, toxicity/safety, and response rates. RESULTS: The proportion of patients who received all cycles of preoperative chemotherapy was 93% (ECF group) and 98% (chemoradiation group), while 65 and 53%, respectively, received all cycles of postoperative chemotherapy. Overall, 92% of patients allocated to preoperative chemoradiation received this treatment. The proportion of patients proceeding to surgery was 90% (ECF group) and 85% (chemoradiation group). Grade 3 or higher surgical complications occurred in 22% of patients in both groups. Furthermore, grade 3 or higher gastrointestinal toxicity occurred in 32% (ECF group) and 30% (chemoradiation group) of patients, while hematologic toxicity occurred in 50 and 52% of patients. CONCLUSIONS: These results demonstrate that preoperative chemoradiation can be safely delivered to the vast majority of patients without a significant increase in treatment toxicity or surgical morbidity.

Molecular Identification of Sclerotinia trifoliorum and Sclerotinia sclerotiorum Isolates from the United States and Poland.

Symptoms of clover rot caused by Sclerotinia trifoliorum or S. sclerotiorum are identical, making differentiation and identification of the causal species difficult and time consuming. Polymerase chain reaction (PCR) amplification and nucleotide sequencing were used to examine 40 isolates of S. trifoliorum (29 from Poland, 11 from the United States) and 55 isolates of S. sclerotiorum (26 from Poland, 29 from the United States). We determined that amplification of the ß-tubulin and calmodulin genes with TU1/TU2/TU3 and SscadF1/SscadR1 PCR primers and the presence of introns and single-nucleotide polymorphisms (SNP) within the ribosomal DNA (rDNA) as detected with NS1/NS8 and internal transcribed spacer (ITS)1/ITS4 PCR primers are effective for rapidly and accurately differentiating between the two species of Sclerotinia. In addition, our research revealed a lack of intraspecies variation within S. sclerotiorum isolates from the United States and Poland using these same molecular markers. We detected a relatively high degree of intraspecies variability among isolates of S. trifoliorum from the United States and Poland using the presence of introns and SNP within the rDNA. SNP and nuclear small-subunit rDNA analyses revealed distinct groups of S. trifoliorum among the isolates used in this study. The results of this study provide useful information for clover breeders and pathologists looking to develop clover varieties with durable resistance.

Diguanylate Cyclases AdrA and STM1987 Regulate Salmonella enterica Exopolysaccharide Production during Plant Colonization in an Environment-Dependent Manner.

Increasing evidence indicates that despite exposure to harsh environmental stresses, Salmonella enterica successfully persists on plants, utilizing fresh produce as a vector to animal hosts. Among the important S. enterica plant colonization factors are those involved in biofilm formation. S. enterica biofilm formation is controlled by the signaling molecule cyclic di-GMP and represents a sessile lifestyle on surfaces that protects the bacterium from environmental factors. Thus, the transition from a motile, planktonic lifestyle to a sessile lifestyle may represent a vital step in bacterial success. This study examined the mechanisms of S. enterica plant colonization, including the role of diguanylate cyclases (DGCs) and phosphodiesterases (PDEs), the enzymes involved in cyclic di-GMP metabolism. We found that two biofilm components, cellulose and curli, are differentially required at distinct stages in root colonization and that the DGC STM1987 regulates cellulose production in this environment independent of AdrA, the DGC that controls the majority of in vitro cellulose production. In addition, we identified a new function for AdrA in the transcriptional regulation of colanic acid and demonstrated that adrA and colanic acid biosynthesis are associated with S. enterica desiccation tolerance on the leaf surface. Finally, two PDEs with known roles in motility, STM1344 and STM1697, had competitive defects in the phyllosphere, suggesting that regulation of motility is crucial for S. enterica survival in this niche. Our results indicate that specific conditions influence the contribution of individual DGCs and PDEs to bacterial success, perhaps reflective of differential responses to environmental stimuli.

A Holistic Approach to Early Relational Health: Cultivating Culture, Diversity, and Equity.

Early Relational Health (ERH) is the foundation for infant and child emotional and social wellbeing. ERH is a quality of relationships co-created by infants, caregivers, and other members of their families and communities from pregnancy through childhood. Relationships themselves are not ERH; rather, ERH can be a feature of relationships. Those that are characterized by positive, shared emotionality become contexts within which members co-develop mutual capacities that enable them to prevail and flourish. This essay offers a synthesis of current knowledge about ERH in the US and begins to integrate Indigenous and non-Indigenous research and knowledge about ERH in the hope that readers will embrace "Etuaptmumk"-"Two-Eyed Seeing". The authors maintain that systems of care for infants, families, and their communities must first and foremost attend to revitalization, cultural context, diversity, equity, and inclusion. Authors discuss key concepts in ERH; Indigenous and non-Indigenous research that inform ERH; structural and systemic factors in the US that affect ERH ecosystems; the critical intersections of culture, diversity, equity; the broader concept of village support for fostering ERH; and efforts to revitalize ERH discourse, practices, and policies. The authors advocate for a holistic approach to ERH and suggest future directions for research and advocacy.

Parents' Perspectives on Early Relational Health: A Qualitative Study.

OBJECTIVE: The American Academy of Pediatrics endorses a paradigm shift toward promoting early relational health (ERH) in pediatrics. Pediatric clinicians have a unique opportunity to promote ERH, yet little work has sought parents' perspectives on how clinicians can do so effectively. We sought to understand diverse parents' perspectives on ERH and the role of pediatric clinicians in supporting it. METHODS: We conducted virtual focus groups using a guide prepared with input from community partners and parent advisors. We purposively sampled a diverse group of parents of children aged ≤7 years. Focus groups were recorded and transcribed verbatim. We analyzed data as it was collected and identified themes using an inductive and iterative process. RESULTS: Thirty-seven parents participated in 8 focus groups (median parent age: 36.0 years; 43.2% Asian, 18.9% Black/African-American; 32.4% Hispanic/Latino; 78.4% mothers). We identified 3 organizing themes: (1) Time, attention, and open communication with children lay a foundation for ERH; (2) Pediatric clinicians have an opportunity to promote ERH, but disconnected parent-clinician relationships are a major barrier; and (3) Enhanced communication and careful attention to child development and family well-being represent key opportunities to strengthen parent-clinician relationships. CONCLUSION: Parents identified time, attention, and open communication as essential to ERH. Although participants expressed openness to clinicians addressing ERH, such work is contingent on strong parent-clinician relationships. Policymakers and clinicians seeking to address ERH in pediatric settings must also be prepared to address potential barriers through strategies like providing adequate time to facilitate relationship-building and careful attention to address this critical topic.

Temporal trends of ambulance time intervals for suspected stroke/transient ischaemic attack (TIA) before and during the COVID-19 pandemic in Ireland: a quasi-experimental study.

OBJECTIVES: Time is a fundamental component of acute stroke and transient ischaemic attack (TIA) care, thus minimising prehospital delays is a crucial part of the stroke chain of survival. COVID-19 restrictions were introduced in Ireland in response to the pandemic, which resulted in major societal changes. However, current research on the effects of the COVID-19 pandemic on prehospital care for stroke/TIA is limited to early COVID-19 waves. Thus, we aimed to investigate the effect of the COVID-19 pandemic on ambulance time intervals and suspected stroke/TIA call volume for adults with suspected stroke and TIA in Ireland, from 2018 to 2021. DESIGN: We conducted a secondary data analysis with a quasi-experimental design. SETTING: We used data from the National Ambulance Service in Ireland. We defined the COVID-19 period as '1 March 2020-31 December 2021' and the pre-COVID-19 period '1 January 2018-29 February 2020'. PRIMARY AND SECONDARY OUTCOME MEASURES: We compared five ambulance time intervals: 'allocation performance', 'mobilisation performance', 'response time', 'on scene time' and 'conveyance time' between the two periods using descriptive and regression analyses. We also compared call volume for suspected stroke/TIA between the pre-COVID-19 and COVID-19 periods using interrupted time series analysis. PARTICIPANTS: We included all suspected stroke/TIA cases ≥18 years who called the National Ambulance Service from 2018 to 2021. RESULTS: 40 004 cases were included: 19 826 in the pre-COVID-19 period and 19 731 in the COVID-19 period. All ambulance time intervals increased during the pandemic period compared with pre-COVID-19 (p<0.001). Call volume increased during the COVID-19-period compared with the pre-COVID-19 period (p<0.001). CONCLUSIONS: A 'shock' like a pandemic has a negative impact on the prehospital phase of care for time-sensitive conditions like stroke/TIA. System evaluation and public awareness campaigns are required to ensure maintenance of prehospital stroke pathways amidst future healthcare crises. Thus, this research is relevant to routine and extraordinary prehospital service planning.

Radiotherapy of abdomen with precise renal assessment with SPECT/CT imaging (RAPRASI): design and methodology of a prospective trial to improve the understanding of kidney radiation dose response.

BACKGROUND: The kidneys are a principal dose-limiting organ in radiotherapy for upper abdominal cancers. The current understanding of kidney radiation dose response is rudimentary. More precise dose-volume response models that allow direct correlation of delivered radiation dose with spatio-temporal changes in kidney function may improve radiotherapy treatment planning for upper-abdominal tumours. METHODS/DESIGN: The Radiotherapy of Abdomen with Precise Renal Assessment with SPECT/CT Imaging (RAPRASI) is an observational clinical research study with participating sites at Sir Charles Gairdner Hospital (SCGH) in Perth, Australia and the Peter MacCallum Cancer Centre (PMCC) in Melbourne, Australia. Eligible patients are those with upper gastrointestinal cancer, without metastatic disease, undergoing conformal radiotherapy that will involve incidental radiation to one or both kidneys. For each patient, total kidney function is being assessed before commencement of radiotherapy treatment and then at 4, 12, 26, 52 and 78 weeks after the first radiotherapy fraction, using two procedures: a Glomerular Filtration Rate (GFR) measurement using the 51Cr-ethylenediamine tetra-acetic acid (EDTA) clearance; and a regional kidney perfusion measurement assessing renal uptake of 99mTc-dimercaptosuccinic acid (DMSA), imaged with a Single Photon Emission Computed Tomography / Computed Tomography (SPECT/CT) system. The CT component of the SPECT/CT provides the anatomical reference of the kidney's position. The data is intended to reveal changes in regional kidney function over the study period after the radiotherapy. These SPECT/CT scans, co-registered with the radiotherapy treatment plan, will provide spatial correlation between the radiation dose and regional renal function as assessed by SPECT/CT. From this correlation, renal response patterns will likely be identified with the purpose of developing a predictive model. TRIAL REGISTRATION: Australian New Zealand Clinical Trials Registry: ACTRN12609000322235.

Expression and mapping of anthocyanin biosynthesis genes in carrot.

Anthocyanin gene expression has been extensively studied in leaves, fruits and flowers of numerous plants. Little, however, is known about anthocyanin accumulation in roots of carrots or other species. We quantified expression of six anthocyanin biosynthetic genes [phenylalanine ammonia-lyase (PAL3), chalcone synthase (CHS1), flavanone 3-hydroxylase (F3H), dihydroflavonol 4-reductase (DFR1), leucoanthocyanidin dioxygenase (LDOX2), and UDP-glucose:flavonoid 3-O-glucosyltransferase (UFGT)] in three carrot inbreds with contrasting root color: solid purple (phloem and xylem); purple outer phloem/orange xylem; and orange phloem and xylem. Transcripts for five of these genes (CHS1, DFR1, F3H, LDOX2, PAL3) accumulated at high levels in solid purple carrots, less in purple-orange carrot, and low or no transcript in orange carrots. Gene expression coincided with anthocyanin accumulation. In contrast, UFGT expression was comparable in purple and orange carrots and relatively unchanged during root development. In addition, five anthocyanin biosynthesis genes [FLS1 (flavonol synthase), F3H, LDOX2, PAL3, and UFGT] and three anthocyanin transcription factors (DcEFR1, DcMYB3 and DcMYB5) were mapped in a population segregating for the P 1 locus that conditions purple root color. P 1 mapped to chromosome 3 and of the eight anthocyanin biosynthesis genes, only F3H and FLS1 were linked to P 1. The gene expression and mapping data suggest a coordinated regulatory control of anthocyanin expression in carrot root and establish a framework for studying the anthocyanin pathway in carrots, and they also suggest that none of the genes evaluated is a candidate for P 1.

A coupled kinematics-energetics model for predicting energy efficient flapping flight.

A new computational model based on an optimal power, wake-only aerodynamics method is presented to predict the interdependency of energetics and kinematics in bird and bat flight. The model is divided into offline, intermediate and online modules. In the offline module, a four-dimensional design space sweep is performed (lift, thrust, flapping amplitude and flapping frequency). In the intermediate stage, the physical characteristics of the animal are introduced (wing span, mass, wing area, aspect ratio, etc.), and a series of amplitude-frequency response surfaces are constructed for all viable flight speeds. In the online component, the amplitude-frequency response surfaces are mined for the specific flapping motions being considered. The method is applied to several biological examples including a medium sized fruit bat (Cynopterus brachyotis), and two birds: a thrush nightingale (Luscinia luscinia) and a budgerigar (Melopsittacus undulatus). For each of these animals, the power and kinematics predictions are compared with available experimental data. These examples demonstrate that this new method can reasonably predict animal flight energetics and kinematics.

Percutaneous drainage of colonic diverticular abscess: is colon resection necessary?

BACKGROUND: Recurrent diverticulitis has been reported in up to 30% to 40% of patients who recover from an episode of colonic diverticular abscess, so elective interval resection is traditionally recommended. OBJECTIVE: The aim of this study was to review the outcomes of patients who underwent percutaneous drainage of colonic diverticular abscess without subsequent operative intervention. DESIGN: This was an observational study. SETTINGS: This investigation was conducted at a tertiary care academic medical center and a single-hospital health system. PATIENTS: Patients treated for symptomatic colonic diverticular abscess from 2002 through 2007 were included. MAIN OUTCOME MEASURES: The primary outcomes measured were complications, recurrence, and colectomy-free survival. RESULTS: Two hundred eighteen patients underwent percutaneous drainage of colonic diverticular abscesses. Thirty-two patients (15%) did not undergo subsequent colonic resection. Abscess location was pelvic (n = 9) and paracolic (n = 23), the mean abscess size was 4.2 cm, and the median duration of percutaneous drainage was 20 days. The comorbidities of this group of patients included severe cardiac disease (n = 16), immunodeficiency (n = 7), and severe pulmonary disease (n = 6). Freedom from recurrence at 7.4 years was 0.58 (95% CI 0.42-0.73). All recurrences were managed nonoperatively. Recurrence was significantly associated with an abscess size larger than 5 cm. Colectomy-free survival at 7.4 years was 0.17 (95% CI 0.13-0.21). LIMITATIONS: This study was limited by its retrospective, nonexperimental design and short follow-up. CONCLUSION: In selected patients, observation after percutaneous drainage of colonic diverticular abscess appears to be a safe and low-risk management option.

The evolving role of laparoscopy in colonic diverticular disease: a systematic review.

BACKGROUND: A PubMed search of the biomedical literature was carried out to systematically review the role of laparoscopy in colonic diverticular disease. All original reports comparing elective laparoscopic, hand-assisted, and open colon resection for diverticular disease of the colon, as well as original reports evaluating outcomes after laparoscopic lavage for acute diverticulitis, were considered. Of the 21 articles chosen for final review, nine evaluated laparoscopic versus open elective resection, six compared hand-assisted colon resection versus conventional laparoscopic resection, and six considered laparoscopic lavage. Five were randomized controlled trials. RESULTS: Elective laparoscopic colon resection for diverticular disease is associated with increased operative time, decreased postoperative pain, fewer postoperative complications, less paralytic ileus, and shorter hospital stay compared to open colectomy. Laparoscopic lavage and drainage appears to be a safe and effective therapy for selected patients with complicated diverticulitis. CONCLUSIONS: Elective laparoscopic colectomy for diverticular disease is associated with decreased postoperative morbidity compared to open colectomy, leading to shorter hospital stay and fewer costs. Laparoscopic lavage has an increasing but poorly defined role in complicated diverticulitis.

Out-of-hospital cardiac arrest in Cork, Ireland.

BACKGROUND: Out-of-hospital cardiac arrest (OHCA) in Ireland accounts for approximately 5000 deaths annually. Little published evidence exists on survival from OHCA in this country to date. We aimed to characterise and describe 'presumed cardiac' OHCA in Cork City and County attended by the Ambulance Service. METHODS: Dispatch records, ambulance patient records and hospital records for a 1-year period were examined for patient demographics, OHCA characteristics, interventions and patient outcomes. RESULTS: There were 231 'presumed cardiac' OHCAs attended over the study period; 130 (56%) were in urban locations and 101 (44%) in rural. OHCAs were lay-witnessed in 20% (n=46), and 22% (n=50) received bystander CPR. Shockable rhythm was present in 36 cases (16%) on initial assessment, and there was no difference in presence of shockable rhythm between urban and rural OHCAs (18% vs 13%, p=0.31). Resuscitation was attempted in 176 cases (77.5%), of whom 27 (15%) achieved return of spontaneous circulation and 13 (7.4%) survived to leave hospital. Survival when the initial rhythm was shockable was 16.7% (6 of 36 patients). Despite longer response times for rural compared with urban OHCAs (median (IQR) 16.5 (11.0-23.5) vs 9 (7-12) min, p<0.001), survival to leave hospital alive where resuscitation was attempted was similar (7.4% vs 7.4%, p=0.99, respectively). CONCLUSION: A survival rate of 16.7% in shockable rhythms indicates scope for improvement which would influence the overall survival rate which was found to be 7.4%. Real-time feedback of performance and quality of the continuum of patient care through a clinical-quality cardiac arrest registry would monitor and incentivise such initiatives.

Paramedic perspectives of job stress: Qualitative analysis of high-stress, high-stakes emergency medical situations.

The time from when an ambulance paramedic receives the 911 alarm notification until they have determined the differential diagnosis of a patient is highly stressful. During this time, there is a high demand placed on the paramedic, and they have a low level of control. Recent advances in prehospital care that place more responsibility on paramedics have exacerbated this high-stress phenomenon. Twenty paramedics from across the United States were interviewed and evaluated using descriptive phenomenology to better understand one of the most stressful moments of high-stakes decision-making that paramedics regularly face. Using descriptive phenomenology, we identified six categories in the paramedics' interview responses: pressure, overwhelm, emotional extremes (with sub-categories of adrenaline rush and time-dilation), dissociation, multi-tasking, and disconnect. This analysis of the paramedic's lived experience of this high-stress, high-stakes phenomenon provides insight into how paramedics experience the unique stress of this phenomenon. This understanding is key to elucidating the effects of this acute stress that may impact the judgment and, ultimately, the care performed by the paramedic. Both early- and late-career paramedics from thirteen different states in all regions of the United States were interviewed. Further qualitative data from paramedics from a diverse range of regions and backgrounds are essential to identify ways in which to ameliorate the negative effects of acute stress experienced by paramedics. Addressing such issues will reduce turnover and burnout among paramedics.

Ketamine for Super-Refractory Status Epilepticus in Palliative Care. A Case Report and Review of the Literature.

We report a case of super refractory status epilepticus uncontrolled by multiple anti-seizure medications in an individual with acute liver failure due to hepatic cirrhosis and an obstructive ileocecal mass plus multiple bilateral lung lesions presumed to be metastatic. A ketamine infusion was initiated late in his hospitalization which eliminated the convulsive seizures in less than an hour. The abatement of convulsive seizures allowed his grieving wife to return to her husband's bedside to witness the withdrawal of life sustaining treatment and be present during the final 24 hours of his life. We review the medical literature on the role of Intravenous (IV) Ketamine in the treatment of super refractory status epilepticus.