187 research outputs found

    Diagenetic modeling of siliciclastic systems: Status report

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    Basin analysis (the reconstruction of the dynamics and history of sedimentary basins) has entered a quantitative stage that requires analytical lithologic data. These data must include geologic parameters that describe the characteristics of sediments and the diagenetic changes that they undergo through time. Diagenesis is controlled by eight geologic parameters: sediment composition, temperature history, rate of accommodation (subsidence + sea-level changes + sediment compaction), rate of sediment accumulation, age (time that sediments have been exposed to other variables), internal sediment-body architecture (sedimentary texture and structure), sediment-body external geometry, and fluid chemistry and flow history. Tectonic and paleogeographic settings determine the primary compositions of both chemical and siliciclastic sediments. Siliciclastic provenances are reflected by the mineralogy of sandstones. The source or sources of sediment in sandstone units within genetic sequences and the contribution of each source need to be evaluated in terms of quantitative effects on the various diagenetic styles observed. With the use of modern settings as partial analogues, stratigraphic, sedimentologic, and petrographic data can be used to reconstruct sandstone architecture and to draw inferences about original pore fluid chemistry. Subsidence histories, isotopic signatures, trace element compositions, and fluid inclusion studies combined with petrographic observations can be used to set constraints on the geologic parameters for sandstone bodies within a time-temperature-basin setting framework. As more insight is gained into the reaction kinetics within specific paleotectonic and depositional settings, diagenetic modeling will become increasingly more quantitative and precise

    Diagenetic modeling of siliciclastic systems: Status report

    Get PDF
    Basin analysis (the reconstruction of the dynamics and history of sedimentary basins) has entered a quantitative stage that requires analytical lithologic data. These data must include geologic parameters that describe the characteristics of sediments and the diagenetic changes that they undergo through time. Diagenesis is controlled by eight geologic parameters: sediment composition, temperature history, rate of accommodation (subsidence + sea-level changes + sediment compaction), rate of sediment accumulation, age (time that sediments have been exposed to other variables), internal sediment-body architecture (sedimentary texture and structure), sediment-body external geometry, and fluid chemistry and flow history. Tectonic and paleogeographic settings determine the primary compositions of both chemical and siliciclastic sediments. Siliciclastic provenances are reflected by the mineralogy of sandstones. The source or sources of sediment in sandstone units within genetic sequences and the contribution of each source need to be evaluated in terms of quantitative effects on the various diagenetic styles observed. With the use of modern settings as partial analogues, stratigraphic, sedimentologic, and petrographic data can be used to reconstruct sandstone architecture and to draw inferences about original pore fluid chemistry. Subsidence histories, isotopic signatures, trace element compositions, and fluid inclusion studies combined with petrographic observations can be used to set constraints on the geologic parameters for sandstone bodies within a time-temperature-basin setting framework. As more insight is gained into the reaction kinetics within specific paleotectonic and depositional settings, diagenetic modeling will become increasingly more quantitative and precise

    Building a Dental Home Network for Children with Special Health Care Needs

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    Children with special health care needs (SHCNs) live in all communities. They present with a diverse group of diagnoses including complex chronic conditions and diseases; physical, developmental, and intellectual disabilities; sensory, behavioral, emotional, psychiatric, and social disorders; cleft and craniofacial congenital disabilities, anomalies, and syndromes; and inherited conditions causing abnormal growth, development, and health of the oral tissues, the teeth, the jaws, and the craniofacial skeleton. Tooth decay, gum disease, dental injuries, tooth misalignment, oral infections, and other oral abnormalities are commonly seen or reported in the health history of children with SHCNs. Nationally, dental and oral health care ranks as the second most common unmet health need, according to the most recent National Survey of Children with Special Health Care Needs. The State of Minnesota does not have enough dental professionals prepared to meet the demand for care. As a result, children with SHCNs either go untreated or receive inadequate services resulting in treatment delays, the need for additional appointments, poor management of oral pain and dysfunction, adverse dental treatment outcomes and/or a lack of appropriate referrals to needed specialists. Research suggests children with SHCNs are best served when assigned to dental homes where all aspects of their oral health care are delivered in a comprehensive, interdisciplinary, and family-centered way under the direction of knowledgeable, experienced dental professionals working collaboratively with an array of allied health, medical professionals, and community partners. An interdisciplinary team consisting of a pediatric dentist, pediatric physician, and speech-language pathology innovator collaborated to advance current and future dental providers’ knowledge and comfort in providing care for children with SHCNs and was accepted into the Clinical Scholars program. Their interdisciplinary collaborative team project was named MinnieMouths and included the following six methods or critical endeavors to ensure success: 1. Development of a project ECHO site focused on advancing care for children with SHCNs. 2. Creation of a 28-participant web-based professional network of current dental, community health liaisons, family navigators, and medical health providers. 3. Establishment of a 32-participant web-based interface of dental and medical students and residents, including new-to-practice dental providers. 4. Launching an annual conference focused on advancing oral health care for children with SHCN. 5. Build a toolkit aimed at allowing dentists and future leadership teams to launch dental home networks focused on children with SHCN. 6. Building a Dental Homes Network Field Guide for Providers who attended our first in-person conference. Findings from the MinnieMouths project suggest that development of peer networks to advance dental homes for children with SHCNs has merit. Network participants gained skills in collaborating with a range of health care providers, understanding the complexities of working within and among health and dental care systems to coordinate care, and the need to better understand and advocate for a more robust medical and dental reimbursement program when launching dental homes for children with SHCN

    Research Needs for Effective Transition in Lifelong Care of Congenital Genitourinary Conditions: A Workshop Sponsored by the National Institute of Diabetes and Digestive and Kidney Diseases

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    Over the last 5 decades, health-care advances have yielded quantum improvements in the life expectancy of individuals with congenital genitourinary conditions (CGCs), leading to a crisis of care. Many individuals with CGC enter adulthood unprepared to manage their condition. Pediatric CGC specialists lack training to manage adulthood-related health-care issues, whereas adult genitourinary specialists lack training within the context of CGCs. To address these challenges, the National Institutes of Diabetes and Digestive and Kidney Diseases convened individuals with CGCs and experts from a variety of fields to identify research needs to improve transitional urology care. This paper outlines identified research needs

    Self‐management for adults with epilepsy: Aggregate Managing Epilepsy Well Network findings on depressive symptoms

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    ObjectiveTo assess depressive symptom outcomes in a pooled sample of epilepsy self‐management randomized controlled trials (RCTs) from the Managing Epilepsy Well (MEW) Network integrated research database (MEW DB).MethodsFive prospective RCTs involving 453 adults with epilepsy compared self‐management intervention (n = 232) versus treatment as usual or wait‐list control outcomes (n = 221). Depression was assessed with the nine‐item Patient Health Questionnaire. Other variables included age, gender, race, ethnicity, education, income, marital status, seizure frequency, and quality of life. Follow‐up assessments were collapsed into a visit 2 and a visit 3; these were conducted postbaseline.ResultsMean age was 43.5 years (SD = 12.6), nearly two‐thirds were women, and nearly one‐third were African American. Baseline sample characteristics were mostly similar in the self‐management intervention group versus controls. At follow‐up, the self‐management group had a significantly greater reduction in depression compared to controls at visit 2 (P < .0001) and visit 3 (P = .0002). Quality of life also significantly improved in the self‐management group at visit 2 (P = .001) and visit 3 (P = .005).SignificanceAggregate MEW DB analysis of five RCTs found depressive symptom severity and quality of life significantly improved in individuals randomized to self‐management intervention versus controls. Evidence‐based epilepsy self‐management programs should be made more broadly available in neurology practices.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/151320/1/epi16322_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/151320/2/epi16322.pd

    Assessment of transition readiness skills and adherence in pediatric liver transplant recipients

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    Fredericks EM, Dore-Stites D, Well A, Magee JC, Freed GL, Shieck V, Lopez MJ. Assessment of transition readiness skills and adherence in pediatric liver transplant recipients. Pediatr Transplantation 2010: 14:944–953. © 2010 John Wiley & Sons A/S.To examine transition readiness, adherence, and health outcomes in pediatric liver transplant recipients using a clinically administered screening measure. Seventy-one pediatric liver transplant recipients (11–20 yr) and 58 parents completed a clinic-based TRS measuring perceived and demonstrated self-management skills, AoR for health-related tasks, regimen knowledge, and psychosocial adjustment. Adherence was measured using s.d. of immunosuppressants, proportion of immunosuppressant blood levels out of target range, and clinic attendance. Health outcomes included liver test panels, biopsies, rejection episodes, and hospitalizations. Results indicate that all domains of transition readiness, with the exception of demonstrated skills, and non-adherence were positively correlated with age. Proportion of immunosuppressant blood levels below target range was positively correlated with self-management skills and increased responsibility for medication tasks. Parent regimen knowledge was associated with clinic attendance. Health outcomes were significantly related to medication non-adherence, but not to transition readiness domains. Medication adherence is considered to be a key factor in the transition from pediatric to adult-centered transplant care. Non-adherence is associated with an increased risk for medical complications and is potentially modifiable. Interventions to promote self-management skills and adherence should be an essential component of transition planning.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/79176/1/j.1399-3046.2010.01349.x.pd

    High rates of unsuccessful transfer to adult care among young adults with juvenile idiopathic arthritis

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    <p>Abstract</p> <p>Background</p> <p>This study aimed to describe the proportion of patients with juvenile idiopathic arthritis (JIA) who had experienced an unsuccessful transfer from a pediatric rheumatology team to an adult rheumatologist and to compare the characteristics of those who achieved successful transfer to those who did not.</p> <p>Methods</p> <p>We conducted a systematic chart review of all patients with JIA who attended their final Montreal Children's Hospital JIA clinic appointment between 1992 and 2005. We tracked these patients for the two years after transfer to an adult rheumatologist. We then compared characteristics of patients with successful and unsuccessful transfers of care. Variables pertaining to disease characteristics, disease severity and psychosocial factors were examined. Univariate analyses were performed to determine if any single factor was associated with the outcome of unsuccessful transfer of care.</p> <p>Results</p> <p>52% of patients fulfilled our criteria for unsuccessful transfer. Of the variables tested, an active joint count (AJC) of zero at last visit was associated with the outcome of unsuccessful transfer (OR = 2.67 (CI 1.16-6.16; p = 0.0199)).</p> <p>Conclusions</p> <p>Despite the presence of a coordinated process of transfer from pediatric to adult health care for the majority of the patients in this study, there was a high rate of unsuccessful transfer and/or sustained follow up which is disheartening. We found that patients with less active disease at the time of transfer, as indicated by a lower AJC, were more likely to be lost to follow up. Recent literature suggests that even in the least severe categories of JIA, 50% of patients persist with active disease into adulthood. Thus educating all JIA patients about the possibility of disease flare in adulthood may improve their adherence to recommendations for sustained follow-up in the adult milieu. This may lead to improvement of longitudinal outcomes for all JIA patients.</p

    The Longitudinal Relationship Between Satisfaction with Transitional Care and Social and Emotional Quality of Life Among Chronically Ill Adolescents

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    This study aimed to identify the relationship between satisfaction with transitional care and quality of life of chronically ill adolescents over time. This longitudinal study included adolescents with type I diabetes, juvenile idiopathic arthritis (JIA), and neuromuscular disorders (NMD). At baseline 138 respondents (response rate 31 %) filled in a questionnaire and 188 about 1 year later (response rate 43 %). Analysis of variance showed that adolescents with diabetes reported the highest physical quality of life, followed in order by those with NMD and JIA (p ≀ 0.01). Adolescents with diabetes reported the highest social quality of life, followed in order by those with JIA and NMD (both at p ≀ 0.001). Univariate analyses showed that satisfaction with transitional care at T0 was significantly related to emotional and physical quality of life at T1 (both at p ≀ 0.05). At T1, satisfaction with transitional care was significantly related to the emotional, physical, and social domains of quality of life (all at p ≀ 0.001). Multiple regression analyses revealed that satisfaction with transitional care at T1 was related to emotional (ÎČ -0.20; p ≀ 0.05) and social (ÎČ -0.35; p ≀ 0.01) quality of life domains over time. This indicates that lower gap scores, which measured differences between 'best care' and 'current care,' are associated with better social and emotional quality of life in this sample of adolescents. Satisfaction with transitional care and social and emotional quality of life are related over time

    Transition of care for adolescents from paediatric services to adult health services

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    Background There is evidence that the process of transition from paediatric (child) to adult health services is often associated with deterioration in the health of adolescents with chronic conditions.Transitional care is the term used to describe services that seek to bridge this care gap. It has been defined as ‘the purposeful, planned movement of adolescents and young adults with chronic physical and medical conditions from child-centred to adult-oriented health care systems’. In order to develop appropriate services for adolescents, evidence of what works and what factors act as barriers and facilitators of effective interventions is needed. Objectives To evaluate the effectiveness of interventions designed to improve the transition of care for adolescents from paediatric to adult health services. Search methods We searched The Cochrane Central Register of Controlled Trials 2015, Issue 1, (including the Cochrane Effective Practice and Organisation of Care Group Specialised Register), MEDLINE, EMBASE, PsycINFO, and Web of Knowledge to 19 June 2015. We also searched reference lists of included studies and relevant reviews, and contacted experts and study authors for additional studies. Selection criteria We considered randomised controlled trials (RCTs), controlled before- and after-studies (CBAs), and interrupted time-series studies (ITSs) that evaluated the effectiveness of any intervention (care model or clinical pathway), that aimed to improve the transition of care for adolescents from paediatric to adult health services. We considered adolescents with any chronic condition that required ongoing clinical care, who were leaving paediatric services and going on to receive services in adult healthcare units, and their families. Participating providers included all health professionals responsible for the care of young people
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