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1.
Nature ; 626(8000): 737-741, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37879361

RESUMO

The mergers of binary compact objects such as neutron stars and black holes are of central interest to several areas of astrophysics, including as the progenitors of gamma-ray bursts (GRBs)1, sources of high-frequency gravitational waves (GWs)2 and likely production sites for heavy-element nucleosynthesis by means of rapid neutron capture (the r-process)3. Here we present observations of the exceptionally bright GRB 230307A. We show that GRB 230307A belongs to the class of long-duration GRBs associated with compact object mergers4-6 and contains a kilonova similar to AT2017gfo, associated with the GW merger GW170817 (refs. 7-12). We obtained James Webb Space Telescope (JWST) mid-infrared imaging and spectroscopy 29 and 61 days after the burst. The spectroscopy shows an emission line at 2.15 microns, which we interpret as tellurium (atomic mass A = 130) and a very red source, emitting most of its light in the mid-infrared owing to the production of lanthanides. These observations demonstrate that nucleosynthesis in GRBs can create r-process elements across a broad atomic mass range and play a central role in heavy-element nucleosynthesis across the Universe.

2.
Scand J Public Health ; 52(3): 391-396, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38153124

RESUMO

AIMS: This protocol describes a forthcoming systematic review of the question: 'What are the long-term effects of historical influenza pandemics on mental health, resulting either from illness itself or the social or economic effects of pandemics and public health responses?' METHODS: We will review studies that investigate associations between influenza pandemics and long-term mental-health impacts. Following the PICO framework, populations (P) may include those with and without pre-existing mental-health symptoms or conditions. Intervention (I) is exposure to an influenza pandemic during the study period encompassing five pandemics (1889-2009). Comparators or controls (C) are not applicable. The review will address outcomes (O) of mental-health morbidity from direct infection and/or related circumstances, including, for example, receiving a disability pension, institutionalisation and/or death. RESULTS: Due to societal disruptions, illness and bereavement during pandemics, many people are likely to be affected in myriad ways. Therefore, investigation into mental-health consequences should not be restricted by risk group or diagnosis. To our knowledge, this protocol and forthcoming systematic review are the first to include studies for broad populations and multiple measures of mental-health morbidity. The historical perspective and comparison of pandemics with varying severity but assumed similar causative pathogens also enable insights into the consistency of long-term consequences across pandemics. CONCLUSIONS: Pandemics likely produce long-term mental-health impacts with relevance for social, health and economic planning. The systematic review based on this protocol will complement other evidence on pandemic impacts and help policymakers incorporate relevant interventions.


Assuntos
Influenza Humana , Pandemias , Revisões Sistemáticas como Assunto , Humanos , Influenza Humana/epidemiologia , COVID-19/epidemiologia , Saúde Mental , Transtornos Mentais/epidemiologia , Projetos de Pesquisa
3.
Ann Surg ; 276(2): 324-333, 2022 08 01.
Artigo em Inglês | MEDLINE | ID: mdl-32941272

RESUMO

OBJECTIVES: Class II (120% > body mass index [BMI] < 140% of the 95th percentile for age and sex) and Class III (BMI >140% of the 95th percentile for age and sex) obesity are the fastest growing subcategories of obesity in the United States pediatric population. Metabolic and bariatric surgery (MBS) is a safe and effective treatment option for with class II/III obesity. The primary objectives of this analysis were to determine the (1) current US MBS utilization rates in those with class II/III obesity and (2) utilization rates and 30-day postoperative outcomes. BACKGROUND: The 2015 to 2018 National Health and Nutrition Examination Survey cross-sectional data (N = 19,225) generated US with class II/III obesity prevalence estimates. The 2015 to 2018 Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP) longitudinal (30 days) cohort data were used to compare adolescent and adult (N = 748,622) postoperative outcomes and to calculate utilization rates. METHODS: The 2015 to 2018 youth and adult MBS utilization rates were calculated using MBSAQIP data (numerator) and National Health and Nutrition Examination Survey data (denominator). Two-sample tests of proportions were performed to compare the MBS utilization rates by age, ethnicity, and sex and expressed per 1000. RESULTS: Mean age of the analytical MBSAQIP sample was 17.9 (1.15) years in youth (n = 3846) and 45.1 (11.5) in adults (N = 744,776), majority female (77.4%, 80.7%, respectively) and non-Hispanic White (68.5%, 59.4%, respectively). The overall 2015 to 2018 MBS utilization rate for youth was 1.81 per 1000 and 5.56 per 1000 for adults ( P < 0.001). Adult patients had slightly higher percentage (4.2%) of hospital readmissions compared to youth (3.4%, P = 0.01) but there were no other post-MBS complication differences. From 2015 to 2018 the US prevalence of youth with class II/III obesity increased in Hispanics and non-Hispanic Blacks (P trend < 0.001), but among youth who did complete MBS non-Hispanic Whites had higher rates of utilization (45.8%) compared to Hispanics (22.7%) and non-Hispanic blacks 14.2% (P = 0.006). CONCLUSIONS: MBS is an underutilized obesity treatment tool for both youth and adults, and among ethnic minority groups in particular.


Assuntos
Cirurgia Bariátrica , Obesidade Mórbida , Adolescente , Criança , Estudos Transversais , Etnicidade , Feminino , Humanos , Grupos Minoritários , Inquéritos Nutricionais , Obesidade , Obesidade Mórbida/epidemiologia , Obesidade Mórbida/cirurgia , Estados Unidos/epidemiologia
4.
Am J Orthod Dentofacial Orthop ; 160(1): 50-57, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-34090735

RESUMO

INTRODUCTION: The purpose of this study was to compare the metabolism of Streptococcus mutans biofilms after 1-7 days of growth on different orthodontic adhesives. METHODS: Specimens of 6 commercial orthodontic adhesives were fabricated in custom-made molds and polymerized using a light-emitting diode light-curing unit. Bioluminescent S mutans (UA159:JM10) biofilms were grown on ultraviolet-sterilized specimens for 1, 3, 5, and 7 days (n = 18 biofilms/d/product) in anaerobic conditions at 37°C. The metabolism of biofilms (relative luminescence unit [RLU]) was measured 0, 2, 4, and 6 minutes after exposure to D-luciferin solution using a microplate reader. A linear mixed-effects model was used to analyze the logarithm of RLU (log RLU). The model included fixed effects of products, days, and minutes. Tukey-Kramer post-hoc tests were then performed on the significant predictors of log RLU (α = 0.05). RESULTS: Days (P <0.0001) and minutes (P <0.0001) were independent predictors of log RLU, but the products were not (P = 0.5869). After adjusting for minutes, the log RLU was analyzed with a post-hoc test, and all differences between days were significant with the exceptions of day 3 from day 5 (P = 0.0731) and day 5 from day 7 (P = 0.8802). After adjusting for day, log RLU was analyzed with a post-hoc test and all differences in minutes were significant. CONCLUSIONS: No significant differences in the metabolism of S mutans biofilms were observed among the 6 orthodontic adhesives. Biofilms that were grown for 3 days demonstrated the highest levels of biofilm metabolism as evidenced by higher mean log RLU values relative to 1, 5, and 7-day growth durations.


Assuntos
Cimentos Dentários , Streptococcus mutans , Biofilmes , Humanos
6.
J Vet Pharmacol Ther ; 42(5): 530-540, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31369157

RESUMO

The objective of this study was to develop a nonlinear mixed-effects model of vitacoxib disposition kinetics in dogs after intravenous (I.V.), oral (P.O.), and subcutaneous (S.C.) dosing. Data were pooled from four consecutive pharmacokinetic studies in which vitacoxib was administered in various dosing regimens to 14 healthy beagle dogs. Plasma concentration versus time data were fitted simultaneously using the stochastic approximation expectation maximization (SAEM) algorithm for nonlinear mixed-effects as implemented in Monolix version 2018R2. Correlations between random effects and significance of covariates on population parameter estimates were evaluated using multiple samples from the posterior distribution of the random effects. A two-compartment mamillary model with first-order elimination and first-order absorption after P.O. and S.C. administration, best described the available pharmacokinetic data. Final parameter estimates indicate that vitacoxib has a low-to-moderate systemic clearance (0.35 L hr-1  kg-1 ) associated with a low global extraction ratio, but a large volume of distribution (6.43 L/kg). The absolute bioavailability after P.O. and S.C. administration was estimated at 10.5% (fasted) and 54.6%, respectively. Food intake was found to increase vitacoxib oral bioavailability by a fivefold, while bodyweight (BW) had a significant impact on systemic clearance, thereby confirming the need for BW adjustment with vitacoxib dosing in dogs.


Assuntos
Simulação por Computador , Inibidores de Ciclo-Oxigenase 2/farmacocinética , Imidazóis/farmacocinética , Modelos Biológicos , Sulfonas/farmacocinética , Administração Intravenosa , Administração Oral , Animais , Inibidores de Ciclo-Oxigenase 2/sangue , Cães , Feminino , Imidazóis/sangue , Masculino , Método de Monte Carlo , Sulfonas/sangue
7.
Inorg Chem ; 55(5): 2363-73, 2016 Mar 07.
Artigo em Inglês | MEDLINE | ID: mdl-26881723

RESUMO

The new compartmental proligand 4-bromo-3,5-bis{6-(2,2'-bipyridyl)}pyrazole (HL(Br)) was synthesized and shown to form robust [2 × 2] grid complexes [Fe(II)4L(Br)4]X4 with various counteranions (X(-) = PF6(-), ClO4(-), BF4(-), Br(-)). The grid [Fe(II)4L(Br)4](4+) is stable in solution and features two high-spin (HS) and two low-spin (LS) ferrous ions in frozen MeCN, and its redox properties have been studied. Six all-ferrous compounds [Fe4L(Br)4]X4 with different counteranions and different lattice solvent (1a-f) were structurally characterized by X-ray diffraction, and their magnetic properties were investigated by Mössbauer spectroscopy and SQUID magnetometry. Variations in spin-state for the crystalline material range from the [4HS] via the [3HS-1LS] to the [2HS-2LS] forms, with some grids showing thermal spin crossover (SCO). The series of [Fe(II)4L(Br)4](4+) compounds allowed us to establish experimentally well-grounded correlations between structural distortion of the {FeN6} coordination polyhedra, quantified by using continuous shape measures, and the grid's spin-state pattern. These correlations evidenced pronounced cooperativity for the multistep SCO transitions within the grid, imparted by the strain effects of the rigid bridging ligands, and a high stability of the dimixed-spin configuration trans-[2HS-2LS] that has identical sites at opposite corners of the grid. The results are in good agreement with recent quantum chemical calculations for such molecular [2 × 2] grids featuring strongly elastically coupled vertices.

8.
Surg Endosc ; 30(9): 4029-32, 2016 09.
Artigo em Inglês | MEDLINE | ID: mdl-26701703

RESUMO

BACKGROUND: Laparoscopy has emerged as an alternative to laparotomy in select trauma patients. In animal models, increasing abdominal pressure is associated with an increase in intrathoracic and intracranial pressures. We conducted a prospective trial of human subjects who underwent laparoscopic-assisted ventriculoperitoneal shunt placement (lap VPS) with intraoperative measurement of intrathoracic, intracranial and cerebral perfusion pressures. METHODS: Ten patients undergoing lap VPS were recruited. Abdominal insufflation was performed using CO2 to 0, 8, 10, 12 and 15 mmHg. ICP was measured through the ventricular catheter simultaneously with insufflation and with desufflation using a manometer. Peak inspiratory pressures (PIP) were measured through the endotracheal tube. Blood pressure was measured using a noninvasive blood pressure cuff. End-tidal CO2 (ETCO2) was measured for each set of abdominal pressure level. Pressure measurements from all points of insufflation were compared using a two-way ANOVA with a post hoc Bonferroni test. Mean changes in pressures were compared using t test. RESULTS: ICP and PIP increased significantly with increasing abdominal pressure (both p < 0.01), whereas cerebral perfusion pressure (CPP) and mean arterial pressure did not significantly change with increasing abdominal pressure over the range tested. Higher abdominal pressure values were associated with decreased ETCO2 values. CONCLUSION: Increased ICP and PIP appear to be a direct result of increasing abdominal pressure, since ETCO2 did not increase. Though CPP did not change over the range tested, the ICP in some patients with 15 mmHg abdominal insufflation reached values as high as 32 cmH2O, which is considered above tolerance, regardless of the CPP. Laparoscopy should be used cautiously, in patients who present with baseline elevated ICP or head trauma as abdominal insufflation affects intracranial pressure.


Assuntos
Inalação/fisiologia , Pressão Intracraniana/fisiologia , Laparoscopia , Pneumoperitônio Artificial/efeitos adversos , Pressão , Cavidade Torácica/fisiologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Derivação Ventriculoperitoneal
9.
Int J Obes (Lond) ; 39(2): 260-264, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24946907

RESUMO

OBJECTIVE: To study the day-night variation of omentin-1 levels and assess whether leptin and/or short- and long-term energy deprivation alter circulating omentin-1 levels via cytokines. DESIGN AND METHODS: Omentin-1 levels were measured hourly in serum samples from six healthy men to evaluate for day-night variation. To study effects of acute energy deprivation and of leptin administration, eight healthy subjects were studied in the fasting state for 72 h with administration of either placebo or metreleptin (recombinant human leptin) in physiologic replacement doses. We evaluated the effect of leptin in pharmacologic doses on serum omentin-1 and cytokine levels, as well as on omentin-1 levels in ex vivo omental adipose tissue, in 15 healthy volunteers. To study the effect of chronic energy deprivation and weight loss on omentin-1 levels, we followed 18 obese subjects for 12 months who underwent bariatric surgery. RESULTS: There is no day-night variation in omentin-1 levels. Short-term and chronic energy deprivation, as well as ex vivo leptin administration and physiologic replacement doses of leptin, do not alter omentin-1 levels; pharmacologic doses of metreleptin reduce omentin-1 levels, whereas levels of tumor necrosis factor-α receptor II and interleukin-6 tend to increase. CONCLUSIONS: Omentin-1 levels are reduced by pharmacologic doses of metreleptin independent of effects on cytokine levels.


Assuntos
Citocinas/sangue , Metabolismo Energético/efeitos dos fármacos , Lectinas/sangue , Leptina/análogos & derivados , Obesidade/metabolismo , Cirurgia Bariátrica , Ritmo Circadiano , Citocinas/efeitos dos fármacos , Citocinas/metabolismo , Relação Dose-Resposta a Droga , Jejum , Proteínas Ligadas por GPI/sangue , Proteínas Ligadas por GPI/efeitos dos fármacos , Proteínas Ligadas por GPI/metabolismo , Humanos , Interleucina-6/metabolismo , Lectinas/efeitos dos fármacos , Lectinas/metabolismo , Leptina/farmacologia , Fator de Necrose Tumoral alfa/efeitos dos fármacos , Redução de Peso
10.
Nanotechnology ; 26(8): 085604, 2015 Feb 27.
Artigo em Inglês | MEDLINE | ID: mdl-25656681

RESUMO

The synthesis of indium phosphide quantum dots (QDs) in toluene under supercritical conditions was carried out in a macroscopic continuous flow reaction system. The results of first experiments are reported in comparison with analogous reactions in octadecene. The reaction system is described and details are provided about special procedures that are enabled by the continuous flow system for the screening of reaction conditions. The produced QDs show very narrow emission peaks with full width at half maximum down to 45 nm and reasonable photoluminescence quantum yields. The subsequent purification process is facilitated by the ease of removal of toluene, and the productivity of the system is increased by high temperature and high pressure conditions.

11.
Surg Endosc ; 29(9): 2794-9, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-25492453

RESUMO

BACKGROUND: Ethnic minority adults have disproportionately higher rates of obesity than Caucasians but are less likely to undergo bariatric surgery. Recent data suggest that minorities might be less likely to seek surgery. Whether minorities who seek surgery are also less likely to proceed with surgery is unclear. METHODS: We interviewed 651 patients who sought bariatric surgery at two academic medical centers to examine whether ethnic minorities are less likely to proceed with surgery than Caucasians and whether minorities who do proceed with surgery have higher illness burden than their counterparts. We collected patient demographics and abstracted clinical data from the medical records. We then conducted multivariable analyses to examine the association between race and the likelihood of proceeding with bariatric surgery within 1 year of initial interview and to compare the illness burden by race and ethnicity among those who underwent surgery. RESULTS: Of our study sample, 66% were Caucasian, 18% were African-American, and 12% were Hispanics. After adjustment for socioeconomic factors, there were no racial differences in who proceeded with bariatric surgery. Among those who proceeded with surgery, illness burden was comparable between minorities and Caucasian patients with the exception that African-Americans were underrepresented among those with reflux disease (0.4, 95% CI 0.2-0.7) and depression (0.4, 0.2-0.7), and overrepresented among those with anemia (4.8, 2.4-9.6) than Caucasian patients. CONCLUSIONS: Race and ethnicity were not independently associated with likelihood of proceeding with bariatric surgery. Minorities who proceeded with surgery did not clearly have higher illness burden than Caucasian patients.


Assuntos
Cirurgia Bariátrica/estatística & dados numéricos , Etnicidade , Disparidades em Assistência à Saúde/etnologia , Grupos Minoritários , Obesidade/cirurgia , Aceitação pelo Paciente de Cuidados de Saúde/etnologia , Adulto , Boston/epidemiologia , Efeitos Psicossociais da Doença , Feminino , Disparidades em Assistência à Saúde/estatística & dados numéricos , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Obesidade/etnologia , Aceitação pelo Paciente de Cuidados de Saúde/estatística & dados numéricos
12.
Rural Remote Health ; 15(4): 3399, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26632083

RESUMO

INTRODUCTION: Although many medical schools incorporate distance learning into their curricula, assessing students at a distance can be challenging. While some assessments are relatively simple to administer to remote students, other assessments, such as objective structured clinical exams (OSCEs) are not. This article describes a means to more effectively and efficiently assess distance learners and evaluate the feasibility and acceptability of the assessment. METHODS: We developed a teleOSCE, administered online in real time, to two cohorts of students on a rural clerkship rotation and assessed the feasibility and acceptability of using such an approach to assess medical students' clinical skills at rural locations. Project feasibility was defined as having development and implementation costs of less than $5000. Project acceptability was determined by analyzing student interview transcripts. A qualitative case study design framework was chosen due to the novel nature of the activity. RESULTS: The implementation cost of the teleOSCE was approximately US$1577.20, making it a feasible educational endeavor. Interview data indicated the teleOSCE was also acceptable to students. CONCLUSIONS: The teleOSCE format may be useful to other institutions as a method to centrally administer clinical skills exams for assessment of distance medical students.


Assuntos
Competência Clínica , Educação a Distância/métodos , Educação de Graduação em Medicina/organização & administração , Faculdades de Medicina/organização & administração , Telemedicina , Austrália , Estágio Clínico/organização & administração , Análise Custo-Benefício , Currículo , Educação a Distância/economia , Avaliação Educacional , Estudos de Viabilidade , Feminino , Humanos , Masculino , Projetos Piloto , Avaliação de Programas e Projetos de Saúde , População Rural , Estudantes de Medicina/estatística & dados numéricos , Adulto Jovem
13.
Breast Cancer Res ; 16(2): R25, 2014 Mar 14.
Artigo em Inglês | MEDLINE | ID: mdl-24625110

RESUMO

INTRODUCTION: There is an unmet clinical need for biomarkers to identify breast cancer patients at an increased risk of developing brain metastases. The objective is to identify gene signatures and biological pathways associated with human epidermal growth factor receptor 2-positive (HER2+) brain metastasis. METHODS: We combined laser capture microdissection and gene expression microarrays to analyze malignant epithelium from HER2+ breast cancer brain metastases with that from HER2+ nonmetastatic primary tumors. Differential gene expression was performed including gene set enrichment analysis (GSEA) using publicly available breast cancer gene expression data sets. RESULTS: In a cohort of HER2+ breast cancer brain metastases, we identified a gene expression signature that anti-correlates with overexpression of BRCA1. Sequence analysis of the HER2+ brain metastases revealed no pathogenic mutations of BRCA1, and therefore the aforementioned signature was designated BRCA1 Deficient-Like (BD-L). Evaluation of an independent cohort of breast cancer metastases demonstrated that BD-L values are significantly higher in brain metastases as compared to other metastatic sites. Although the BD-L signature is present in all subtypes of breast cancer, it is significantly higher in BRCA1 mutant primary tumors as compared with sporadic breast tumors. Additionally, BD-L signature values are significantly higher in HER2-/ER- primary tumors as compared with HER2+/ER + and HER2-/ER + tumors. The BD-L signature correlates with breast cancer cell line pharmacologic response to a combination of poly (ADP-ribose) polymerase (PARP) inhibitor and temozolomide, and the signature outperformed four published gene signatures of BRCA1/2 deficiency. CONCLUSIONS: A BD-L signature is enriched in HER2+ breast cancer brain metastases without pathogenic BRCA1 mutations. Unexpectedly, elevated BD-L values are found in a subset of primary tumors across all breast cancer subtypes. Evaluation of pharmacological sensitivity in breast cancer cell lines representing all breast cancer subtypes suggests the BD-L signature may serve as a biomarker to identify sporadic breast cancer patients who might benefit from a therapeutic combination of PARP inhibitor and temozolomide and may be indicative of a dysfunctional BRCA1-associated pathway.


Assuntos
Proteína BRCA1/genética , Neoplasias Encefálicas/genética , Neoplasias da Mama/genética , Regulação Neoplásica da Expressão Gênica , Transcriptoma , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Biomarcadores Tumorais/genética , Biomarcadores Tumorais/metabolismo , Neoplasias Encefálicas/tratamento farmacológico , Neoplasias Encefálicas/secundário , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/patologia , Linhagem Celular , Linhagem Celular Tumoral , Dano ao DNA , Análise Mutacional de DNA , Dacarbazina/administração & dosagem , Dacarbazina/análogos & derivados , Inibidores Enzimáticos/administração & dosagem , Inibidores Enzimáticos/farmacologia , Feminino , Humanos , Imuno-Histoquímica , Análise de Sequência com Séries de Oligonucleotídeos , Ftalazinas/administração & dosagem , Piperazinas/administração & dosagem , Inibidores de Poli(ADP-Ribose) Polimerases , Poli(ADP-Ribose) Polimerases/genética , Poli(ADP-Ribose) Polimerases/metabolismo , Prognóstico , Receptor ErbB-2/genética , Receptor ErbB-2/metabolismo , Temozolomida
14.
J Surg Res ; 191(1): 140-7, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24787324

RESUMO

BACKGROUND: Hydrocephalus is characterized by ventricular dilatation because of progressive accumulation of cerebrospinal fluid. Normal pressure hydrocephalus (NPH) affects a subset of patients representing a reversible clinical triad of gait disturbance, urinary incontinence, and dementia with normal cerebrospinal fluid pressure and composition. Various shunting procedures have been used for treatment, but techniques and outcomes remain under debate. The objective of this study was to evaluate the clinical outcomes of 232 patients with and without NPH after the first-time Ventriculoperitoneal shunt placement and assessed patterns of failure between December 2004 and December 2012. RESULTS: Mean age was 54.7 y in non-NPH and 71.9 y in NPH patients. We used open technique in 34.3% and laparoscopic technique in 65.7% of NPH patients and 32.7% and 67.3% of the non-NPH patients, respectively. A total of 36 of 232 patients displayed shunt failure, 16.4% in NPH and 15.2% in non-NPH patients. Twenty-three of 155 patients failed after laparoscopic and 13 of 77 failed after open placement. Proximal shunt failure was more frequent in the non-NPH cohort. Distal failures accounted for 13 of 232 cases, and the difference between laparoscopic (six of 155) and open failures (seven of 77) was profound, but not between NPH- and non-NPH patients. CONCLUSIONS: Shunt failures are related to the placement method. Non-NPH patients showed more proximal failures. NPH patients showed fewer proximal failures. Less distal failures were observed after laparoscopic ventriculoperitoneal shunt placement without significant differences between NPH and non-NPH patients. Beyond this, laparoscopic surgery carries distinct advantages such as shorter operating room times and hospital stays, which should translate into less use of pain medications, earlier mobilization, and a lower incidence of ileus.


Assuntos
Análise de Falha de Equipamento , Falha de Equipamento , Hidrocefalia de Pressão Normal/cirurgia , Laparoscopia/efeitos adversos , Derivação Ventriculoperitoneal/efeitos adversos , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Íleus/etiologia , Laparoscopia/métodos , Tempo de Internação , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Duração da Cirurgia , Estudos Retrospectivos , Resultado do Tratamento , Adulto Jovem
15.
Curr Psychiatry Rep ; 16(10): 479, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25135779

RESUMO

Pharmacotherapy of attention deficit-hyperactivity disorder (ADHD) is a well-established and effective treatment modality. However, ADHD medications are not without side effects. Understanding the prevalence of adverse events and effective management of risks associated with stimulants and other medications used to treat ADHD is central to broad applicability and effective treatment. This review discusses the literature on the prevalence of adverse events and management strategies employed. We searched online MEDLINE/PubMed and Cochrane databases for articles using several keywords relating to adverse events associated with ADHD medication management. We discuss the relevant data on the significance and prevalence of side effects and adverse events, highlight recent updates in the field, and suggest approaches to clinical management.


Assuntos
Transtorno do Deficit de Atenção com Hiperatividade/tratamento farmacológico , Estimulantes do Sistema Nervoso Central/efeitos adversos , Doenças Cardiovasculares/induzido quimicamente , Estimulantes do Sistema Nervoso Central/uso terapêutico , Criança , Transtornos da Alimentação e da Ingestão de Alimentos/induzido quimicamente , Crescimento e Desenvolvimento/efeitos dos fármacos , Humanos , Transtornos Mentais/induzido quimicamente , Risco , Gestão de Riscos , Convulsões/induzido quimicamente , Distúrbios do Início e da Manutenção do Sono/induzido quimicamente , Transtornos de Tique/induzido quimicamente
16.
Annu Rev Psychol ; 64: 361-88, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-22856467

RESUMO

Organizational climate and organizational culture theory and research are reviewed. The article is first framed with definitions of the constructs, and preliminary thoughts on their interrelationships are noted. Organizational climate is briefly defined as the meanings people attach to interrelated bundles of experiences they have at work. Organizational culture is briefly defined as the basic assumptions about the world and the values that guide life in organizations. A brief history of climate research is presented, followed by the major accomplishments in research on the topic with regard to levels issues, the foci of climate research, and studies of climate strength. A brief overview of the more recent study of organizational culture is then introduced, followed by samples of important thinking and research on the roles of leadership and national culture in understanding organizational culture and performance and culture as a moderator variable in research in organizational behavior. The final section of the article proposes an integration of climate and culture thinking and research and concludes with practical implications for the management of effective contemporary organizations. Throughout, recommendations are made for additional thinking and research.


Assuntos
Liderança , Cultura Organizacional , Comportamento Social , Humanos
17.
Surg Endosc ; 28(9): 2564-8, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24671352

RESUMO

BACKGROUND: Studies on a virtual reality simulator have demonstrated that sleep-deprived residents make more errors. Work-hour restrictions were implemented, among other reasons, to ensure enough sleep time for residents. The objective of this study was to assess the effects of sleep time, perceived fatigue, and experience on surgical performance. We hypothesized that performance would decrease with less sleep and fatigue, and that experienced surgeons would perform better than less experienced surgeons despite sleep deprivation and fatigue. METHODS: Twenty-two surgical residents and attendings performed a peg transfer task on two simulators: the Fundamentals of Laparoscopic Skills (FLS) trainer and the Virtual Basic Laparoscopic Surgical Trainer (VBLaST©), a virtual version of the FLS. Participants also completed questionnaires to assess their fatigue level and recent sleep hours. Each subject performed ten trials on each simulator in a counterbalanced order. Performance was measured using the FLS normalized scores and analyzed using a multiple regression model. RESULTS: The multiple regression analysis showed that sleep hours and perceived fatigue were not covariates. No correlation was found between experience level and sleep hours or fatigue. Sleep hours and fatigue did not appear to affect performance. Expertise level was the only significant determinant of performance in both FLS and VBLaST©. CONCLUSIONS: Restricting resident work hours was expected to result in less fatigue and better clinical performance. In our study, peg transfer task performance was not affected by sleep hours. Experience level was a significant indicator of performance. Further examination of the complex relationship between sleep hour, fatigue, and clinical performance is needed to support the practice of work-hour restriction for surgical residents.


Assuntos
Competência Clínica , Simulação por Computador , Fadiga/psicologia , Laparoscopia/métodos , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Análise de Regressão , Sono/fisiologia , Inquéritos e Questionários , Análise e Desempenho de Tarefas , Interface Usuário-Computador
18.
Angew Chem Int Ed Engl ; 53(24): 6135-9, 2014 Jun 10.
Artigo em Inglês | MEDLINE | ID: mdl-24854423

RESUMO

A new type of [2×2] matrix-like complexes with one vertex devoid of a metal ion has been selectively synthesized. The defect-grid triiron(II) complex exhibits a sharp and complete spin-crossover (SCO) from the 1HS-2LS to the 2HS-1LS state (HS: high spin; LS: low spin) with wide hysteresis near room temperature. Although the "structurally soft" H-bonded vertex, elastically coupled to the metal ions, accounts for the stabilization of spin states, it also mediates a dramatic, yet reversible, response to the uptake of exogenous solvent molecules leading to silencing of the SCO. The high sensitivity towards those guest molecules, the short response time upon exposure, and the smooth reversibility of guest binding are favorable characteristics for future sensing applications of such defect grids.

19.
Behav Ther ; 55(1): 191-200, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38216232

RESUMO

Measurement-based care (MBC), or the regular use of progress measures to inform clinical decision-making, improves quality of care and clinical outcomes. MBC typically focuses on standardized rather than individualized outcome measurement. In this pilot study, we examined the clinical utility of integrating individualized measurement with existing standardized outcome monitoring in a children's partial hospitalization program. Participants were 48 youth (M age 10.13 ±â€¯1.39; 54.2% male, 41.7% female, 4.2% transgender or nonbinary). Comorbidity was common; 83.4% of youth had more than one diagnosis at intake. Using the Youth Top Problems for individualized outcome measurement, we examined Top Problem content and clinical improvement over time. Finally, we examined completion rates and describe implementation issues. Top Problems were heterogeneous and sensitive to change. Of the 144 problems, 107 (74%) had a focus consistent with measures used in program, while 37 (26%) were not captured by standardized measures used in program. Effect sizes from admission to final measurement ranged from Cohen's d = .75 - 1.00. Initial adoption of the MBC was strong, but sustained use of the system over the treatment course was challenging. Individualized outcome measurement in children's partial hospitalization programs is feasible to administer and sensitive to clinical change that is unique from change captured in standardized measures. Parents were able to self-identify clinically meaningful, highly individualized Top Problems. Challenges of implementation and clinical assessment in acute settings and potential strategies for improving implementation are discussed.


Assuntos
Hospital Dia , Criança , Adolescente , Humanos , Masculino , Feminino , Projetos Piloto
20.
Obes Surg ; 2024 Jun 25.
Artigo em Inglês | MEDLINE | ID: mdl-38918268

RESUMO

PURPOSE: Metabolic and bariatric surgery (MBS) is presently the most evidence-based, effective treatment of obesity. Nevertheless, only half of the eligible individuals who are referred for this procedure complete it. This study aims to investigate the association between social support and MBS completion, considering race and ethnicity. METHODS: In this prospective cohort study, 413 participants were enrolled between 2019 and 2022. Using the 19-item Brief Family Relationship Scale, which comprises three subscales (eight-item Cohesion subscale, four-item Expressiveness subscale, and seven-item Conflict subscale), the quality of family relationship functioning was assessed. Multivariable logistic regression models were used to determine the association between MBS completion and social support status, adjusting for variables including race, ethnicity, age, gender, body mass index, and insurance. RESULTS: The mean age of the sample was 47.55 years (SD 11.57), with 87% of the participants being female and 39% non-Hispanic White. Nearly 35% of participants (n = 145) completed MBS. Multivariable logistic regression analysis showed overall cohesion (adjusted odds ratio [aOR], 1.52 [95% CI, 1.15-2.00]; p = .003) and overall expressiveness (aOR, 1.58 [95% CI, 1.22-2.05]; p < .001) were associated with higher odds of pursuing MBS. There was no significant interaction between overall cohesion, expressiveness, conflict, and race/ethnicity (p = .61, p = .63, p = .25, respectively). CONCLUSION: The findings indicated that there is a link between family-based social support and MBS completion, regardless of race and ethnicity. Future research should continue to explore the complex interplay between family dynamics and MBS outcomes, considering cultural variations to enhance the effectiveness of obesity interventions within diverse communities.

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