Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 132
Filtrar
Mais filtros

Base de dados
Tipo de documento
Intervalo de ano de publicação
1.
Retina ; 44(2): 306-315, 2024 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-37824817

RESUMO

PURPOSE: To identify structural markers of active retinopathy of prematurity (ROP) in foveal and parafoveal retinal layers using hand-held optical coherence tomography. METHODS: Hand-held optical coherence tomography images (n = 278) were acquired from a prospective mixed cross-sectional longitudinal observational study of 87 participants (23-36 weeks gestational age; n = 30 with ROP, n = 57 without ROP) between 31 and 44 weeks postmenstrual age excluding treated ROP and features of cystoid macular edema. Six retinal layer thicknesses from the fovea to the parafovea were analyzed at five locations up to 1,000 µ m, temporally and nasally. RESULTS: The mean outer retinal thickness during active ROP increased at the fovea and parafovea from postmenstrual age 33 weeks to 39 weeks ( P < 0.001), whereas the parafoveal inner nuclear layer and retinal nerve fiber layer reduced ( P < 0.001). Outer retinal thickness at the fovea from 33 weeks to 39 weeks postmenstrual age was consistently thicker in infants with ROP across all levels of prematurity (gestational age). CONCLUSION: Increased foveal and parafoveal outer retina measured using hand-held optical coherence tomography shows potential as a marker for ROP screening.


Assuntos
Recém-Nascido Prematuro , Retinopatia da Prematuridade , Humanos , Recém-Nascido , Estudos Transversais , Idade Gestacional , Estudos Prospectivos , Retina/diagnóstico por imagem , Retinopatia da Prematuridade/diagnóstico , Tomografia de Coerência Óptica/métodos , Estudos Observacionais como Assunto
2.
J Am Pharm Assoc (2003) ; 63(6): 1776-1784.e3, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37696490

RESUMO

BACKGROUND: Patients' perceptions of their interaction with pharmacists can affect how they use this resource for chronic disease care. OBJECTIVE: This qualitative study explored pharmacist-patient interactions and patients' perceptions of pharmacists' roles in cardiovascular disease (CVD) and inflammatory bowel disease (IBD). METHODS: Patient volunteers, recruited through Janssen's Patient Engagement Research Council program, completed a 15-minute prework survey before a 90-minute live virtual focus group session to provide feedback on pharmacist-patient interactions, the pharmacist's role in patient care, and recommendations for improvement. RESULTS: In total, 27 patients participated. Among patients with CVD (n=18), 56% were female, 61% aged ≥65 years, and 39%/39% Black/White. Of those with IBD (n=9), 56% were female, 89% aged 25-44 years, and 33%/56% Black/White. In the CVD cohort, patients conversed with their pharmacists at least monthly, on average. Patients were generally happy with their relationship with their pharmacist, viewing pharmacists as a trusted resource for medication information. Polypharmacy was common in the CVD cohort (mean, 10.8 medications). For patients with IBD, pharmacist-patient interactions were less frequent, relationships were generally perceived as transactional, patients took fewer medications (mean, 3.2), and felt uncomfortable discussing their disease in public. All patients (CVD and IBD) were unaware of pharmacists' medical training/knowledge. Recommendations included private spaces for sensitive conversations, phone/text support, in-depth regular check-ins, and proactive communication to highlight that the pharmacist's role is to provide patient-centered holistic care. CONCLUSION: This research demonstrates a lack of understanding of pharmacist training, accessibility and role among patients with chronic disease, and highlights opportunities to amend delivery of care. These insights can be used to inform strategies and approaches tailored to address unique needs of specific patient populations to enhance pharmacist-patient interactions.


Assuntos
Doenças Cardiovasculares , Doenças Inflamatórias Intestinais , Humanos , Feminino , Masculino , Farmacêuticos , Grupos Focais , Doença Crônica , Doenças Inflamatórias Intestinais/tratamento farmacológico , Papel Profissional
3.
BMC Gastroenterol ; 22(1): 545, 2022 Dec 29.
Artigo em Inglês | MEDLINE | ID: mdl-36581802

RESUMO

BACKGROUND: Inflammatory bowel disease (IBD) is a chronic disease with the potential for significant morbidity in case of suboptimal treatment (e.g. low treatment adherence). In spite of immense research in IBD, literature on association of IBD with race/ethnicity is fragmented. In this study, we aimed to evaluate the association between race/ethnicity and treatment adherence and persistence among patients with Crohn's disease (CD) or ulcerative colitis (UC) initiated with biologic therapies. METHODS: This observational, retrospective study utilized the Optum Clinformatics (Optum) Extended Data Mart Socioeconomic Status (SES) database. Adult patients with ≥ 2 medical claims for CD or UC diagnosis, ≥ 1 medical or pharmacy claim for corresponding FDA-approved biologic therapy, and a ≥ 12-month pre-index (index date: date of the first biologic medical/pharmacy claim) continuous health plan enrollment were included. Treatment adherence was measured as the proportion of days covered of ≥ 80% and treatment persistence by the number of days from the index date to the biologics discontinuation date. Switching among biologics was allowed for both treatment adherence and treatment persistence. Multivariable regression analyses were performed to evaluate the association between race/ethnicity and treatment adherence/persistence. RESULTS: Among patients with CD (N = 1430) and UC (N = 1059) included, majority were White (CD: 80.3%, UC: 78.3%), followed by African Americans (AA; CD: 10.5%, UC: 9.7%). Among patients with CD, AA were significantly less likely to adhere to biologics (adjusted OR [95%CI]: 0.61 [0.38; 0.99]) and more likely to discontinue biologics earlier (adjusted HR [95%CI]: 1.52 [1.16; 2.0]) during the follow-up period compared to Whites, after adjusting for other patient sociodemographic and clinical characteristics. Among patients with UC, no significant differences in the treatment adherence/persistence were observed between different races/ethnicities. CONCLUSIONS: Patients with CD were found to display racial differences in the treatment adherence and persistence of biologics, with significantly lower adherence and earlier discontinuation in AA compared to Whites. Such differences were not observed in patients with UC. Future studies are warranted to understand the possible reasons for racial differences, particularly in patients with CD.


Assuntos
Produtos Biológicos , Colite Ulcerativa , Doença de Crohn , Doenças Inflamatórias Intestinais , Adulto , Humanos , Estudos Retrospectivos , Doenças Inflamatórias Intestinais/tratamento farmacológico , Colite Ulcerativa/tratamento farmacológico , Doença de Crohn/tratamento farmacológico , Fatores Biológicos/uso terapêutico , Terapia Biológica , Produtos Biológicos/uso terapêutico
4.
Am J Public Health ; 111(4): 658-662, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33600248

RESUMO

The COVID-19 pandemic has disproportionately affected underserved and minority populations in the United States. This is partially attributable to limited access to diagnostic testing from deeply rooted structural inequities precipitating higher infection and mortality rates. We describe the process of establishing a drive-through collection site by leveraging an academic-community partnership between a medical institution and a federally qualified health center in Minnesota. Over 10 weeks, 2006 COVID-19 tests were provided to a socioeconomically disadvantaged population of racial/ethnic minorities and low-income essential workers.


Assuntos
Teste para COVID-19 , COVID-19 , Pesquisa Participativa Baseada na Comunidade , Disparidades em Assistência à Saúde/etnologia , Provedores de Redes de Segurança , COVID-19/mortalidade , Etnicidade/estatística & dados numéricos , Humanos , Área Carente de Assistência Médica , Minnesota , Grupos Minoritários/estatística & dados numéricos , Parcerias Público-Privadas , Grupos Raciais , Fatores Socioeconômicos
5.
Can J Physiol Pharmacol ; 99(11): 1234-1239, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-33939925

RESUMO

Cardiovascular diseases including cardiac arrhythmias lead to fatal events in patients with coronary artery disease; however, clinical associations from echocardiography, electrocardiography (ECG), and biomarkers remain unknown. We sought to identify the factors that may be related to elevated QRS intervals in patients with risk for coronary artery disease. In this study, we performed analysis of clinical data from 503 patients divided into two groups, i.e., patients with either <50% coronary artery stenosis or >50% coronary artery stenosis. We further examined patients with elevated ECG parameters such as QRS > 100 ms and QTc > 440 ms. Patients with >50% coronary artery stenosis exhibited significant increases in age, triglycerides, and troponin levels. Further, ECG parameters demonstrated increased QRS and QTc durations, while echocardiographic parameters highlighted a decrease in ejection fraction (EF) and fractional shortening (FS). Patients with QTc > 440 ms exhibited increased brain natriuretic peptide and creatinine levels with a decrease in estimated glomerular filtration rate clearance rates. Patients with QRS > 100 ms had greater left ventricular (LV) mass and LV internal diameter in systole and diastole. Multimodal logistic regression showed significant relation between QTc, age, and creatinine. These findings suggest that patients with significant coronary stenosis may have lower EF and FS with prolonged QRS intervals, demonstrating greater risk for arrhythmic events.


Assuntos
Doença da Artéria Coronariana/fisiopatologia , Estenose Coronária/fisiopatologia , Eletrocardiografia , Função Ventricular , Fatores Etários , Idoso , Biomarcadores/sangue , Doença da Artéria Coronariana/diagnóstico , Estenose Coronária/diagnóstico , Creatinina/sangue , Ecocardiografia , Feminino , Taxa de Filtração Glomerular , Humanos , Masculino , Pessoa de Meia-Idade , Peptídeo Natriurético Encefálico/sangue , Estudos Retrospectivos , Risco , Volume Sistólico
6.
Drug Metab Dispos ; 48(4): 307-316, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-32009006

RESUMO

In vitro data for low-dose inhaled phosphoinositide 3-kinase delta inhibitor nemiralisib revealed that it was a substrate and a potent metabolism-dependent inhibitor of cytochrome P450 (P450) 3A4 and a P-glycoprotein (P-gp) substrate. An integrated in silico, in vitro, and clinical approach including a clinical drug interaction study as well as a bespoke physiologically based pharmacokinetic (PBPK) model was used to assess the drug-drug interaction (DDI) risk. Inhaled nemiralisib (100 µg, single dose) was coadministered with itraconazole, a potent P4503A4/P-gp inhibitor, following 200 mg daily administrations for 10 days in 20 male healthy subjects. Systemic exposure to nemiralisib (AUC0-inf) increased by 2.01-fold versus nemiralisib alone. To extrapolate the clinical data to other P4503A4 inhibitors, an inhaled PBPK model was developed using Simcyp software. Retrospective simulation of the victim risk showed good agreement between simulated and observed data (AUC0-inf ratio 2.3 vs. 2.01, respectively). Prospective DDI simulations predicted a weak but manageable drug interaction when nemiralisib was coadministered with other P4503A4 inhibitors, such as the macrolides clarithromycin and erythromycin (simulated AUC0-inf ratio of 1.7), both common comedications in the intended patient populations. PBPK and static mechanistic models were also used to predict a negligible perpetrator DDI effect for nemiralisib on other P4503A4 substrates, including midazolam (a sensitive probe substrate of P4503A4) and theophylline (a narrow therapeutic index drug and another common comedication). In summary, an integrated in silico, in vitro, and clinical approach including an inhalation PBPK model has successfully discharged any potential patient DDI risks in future nemiralisib clinical trials. SIGNIFICANCE STATEMENT: This paper describes the integration of in silico, in vitro, and clinical data to successfully discharge potential drug-drug interaction risks for a low-dose inhaled drug. This work featured assessment of victim and perpetrator risks of drug transporters and cytochrome P450 enzymes, utilizing empirical and mechanistic approaches combined with clinical data (drug interaction and human absorption, metabolism, and pharmacokinetics) and physiologically based pharmacokinetic modeling approaches to facilitate bespoke risk assessment in target patient populations.


Assuntos
Inibidores do Citocromo P-450 CYP3A/farmacocinética , Citocromo P-450 CYP3A/metabolismo , Indazóis/farmacocinética , Indóis/farmacocinética , Itraconazol/farmacocinética , Oxazóis/farmacocinética , Inibidores de Fosfoinositídeo-3 Quinase/farmacocinética , Piperazinas/farmacocinética , Administração por Inalação , Adolescente , Adulto , Idoso , Área Sob a Curva , Claritromicina/administração & dosagem , Claritromicina/farmacocinética , Simulação por Computador , Estudos Cross-Over , Inibidores do Citocromo P-450 CYP3A/administração & dosagem , Interações Medicamentosas , Eritromicina/administração & dosagem , Eritromicina/farmacocinética , Voluntários Saudáveis , Humanos , Indazóis/administração & dosagem , Indóis/administração & dosagem , Itraconazol/administração & dosagem , Masculino , Microssomos Hepáticos , Midazolam/administração & dosagem , Midazolam/farmacocinética , Pessoa de Meia-Idade , Modelos Biológicos , Oxazóis/administração & dosagem , Inibidores de Fosfoinositídeo-3 Quinase/administração & dosagem , Piperazinas/administração & dosagem , Estudos Prospectivos , Estudos Retrospectivos , Adulto Jovem
7.
Qual Life Res ; 29(4): 953-958, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31782020

RESUMO

BACKGROUND: We compared self-reported domains of health between patients who with vs. without a recent heart failure (HF) hospitalization. METHODS: We fielded a 59-item questionnaire that included the 12-item Kansas City Cardiomyopathy Questionnaire (KCCQ-12) to age/sex-matched groups of 2000 HF patients who had and had not had a recent HF hospitalization. We entered questionnaire responses and electronic medical record data into multivariable logistic regression models to identify independent associations with a HF hospitalization. RESULTS: After two mailings, we received 468 completed questionnaires for response rate of 23.4%. Patients with a recent HF hospitalization had significantly lower scores on the KCCQ-12 Quality of Life (52.6 vs. 59.6, p = 0.016) and Social Limitations (48.4 vs. 55.5, p = 0.009) scales as well as the Clinical Summary Scale (50.8 vs. 55.3, p = 0.048) and Total KCCQ-12 score (49.6 vs. 56.8, p = 0.003). In sequential logistic regression models designed to achieve parsimony, Total KCCQ was a strong predictor of being in the recent hospitalization group. When using the KCCQ-12 sub-scales, the Social Limitations scale was a strong predictor of being in the recent hospitalization group. CONCLUSIONS: After accounting for comorbidities and other risk factors, a HF hospitalization appears to profoundly limit social activities which can increase the risk of poor outcomes.


Assuntos
Atividades Cotidianas , Insuficiência Cardíaca/psicologia , Insuficiência Cardíaca/terapia , Qualidade de Vida/psicologia , Isolamento Social/psicologia , Idoso , Comorbidade , Feminino , Nível de Saúde , Hospitalização/estatística & dados numéricos , Humanos , Modelos Logísticos , Masculino , Fatores de Risco , Autorrelato , Inquéritos e Questionários
8.
Retina ; 40(8): 1592-1602, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31356497

RESUMO

PURPOSE: To investigate dynamic foveal morphology with postmenstrual age, in preterm infants with and without retinopathy of prematurity using hand-held optical coherence tomography, adjusting for gestational age (GA) and birthweight (BW). METHODS: Prospective mixed cross-sectional/longitudinal observational study of 87 participants (23-36 weeks GA; n = 30 with, n = 57 without retinopathy of prematurity) using hand-held optical coherence tomography images (n = 278) acquired between 31 weeks and 44 weeks postmenstrual age excluding treated retinopathy of prematurity. Measurements included foveal width, area, depth, central foveal thickness, maximum slope, and parafoveal retinal thickness at 1,000 µm nasal and temporal to the central fovea. RESULTS: Retinopathy of prematurity was significantly correlated with only foveal width in either GA or BW adjusted statistical models. In contrast, severity of prematurity (GA, BW) correlated with foveal area (P < 0.005), depth (P ≤ 0.001), and slope (P < 0.01), although central foveal thickness (P = 0.007) and parafoveal retinal thickness (P < 0.001) correlated with GA, but not with BW. CONCLUSION: Foveal width is independent of GA and BW with potential in retinopathy of prematurity screening assessment using hand-held optical coherence tomography. Foveal morphology could be graded in prematurity during development, with possible implications for future management of preterm infants.


Assuntos
Fóvea Central/patologia , Recém-Nascido Prematuro , Retinopatia da Prematuridade/diagnóstico , Tomografia de Coerência Óptica , Peso ao Nascer , Estudos Transversais , Feminino , Fóvea Central/diagnóstico por imagem , Idade Gestacional , Humanos , Lactente , Recém-Nascido , Masculino , Triagem Neonatal , Estudos Prospectivos , Acuidade Visual/fisiologia
9.
AAPS PharmSciTech ; 20(8): 324, 2019 Oct 25.
Artigo em Inglês | MEDLINE | ID: mdl-31654266

RESUMO

The deployment of oral multi-unit pellet formulation has gained significant attention in recent years conferring to numerous applications, especially in achieving modified release and acid resistance property. The fluidized bed coating, specifically Wurster technique is commercially utilized for pellet manufacturing, which is a complex process involving too many variables. Risk assessment tools can be employed to determine the critical variables affecting the pre-defined quality profile and screen out important parameters out of literally hundreds of variables to develop a robust product. The present review aims to describe possibly all the variables involved in Wurster coating process and application of FMEA in pellet manufacturing. A brief case study regarding applicability of FMEA to study the effects of critical factors is outlined. Risk assessment tools assist to reduce number of trials to manageable levels with aid of prior art, literature, and preliminary trials to develop an optimized product.


Assuntos
Química Farmacêutica/métodos , Implantes de Medicamento/síntese química , Preparações Farmacêuticas/síntese química , Tecnologia Farmacêutica/métodos , Implantes de Medicamento/farmacocinética , Preparações Farmacêuticas/metabolismo
10.
J Neuroinflammation ; 14(1): 199, 2017 Oct 06.
Artigo em Inglês | MEDLINE | ID: mdl-28985759

RESUMO

BACKGROUND: Neuroinflammation in the brain consequent to activation of microglia is viewed as an important component of Alzheimer's disease (AD) pathology. Amyloid beta (Aß) protein is known to activate microglia and unleash an inflammatory cascade that eventually results in neuronal dysfunction and death. In this study, we sought to identify the presence of amylin receptors on human fetal and murine microglia and determine whether Aß activation of the inflammasome complex and subsequent release of cytokines is mediated through these receptors. METHODS: The presence of dimeric components of the amylin receptor (calcitonin receptor and receptor activity modifying protein 3) were first immunohistochemically identified on microglia. Purified human fetal microglial (HFM) cultures were incubated with an in vivo microglial marker, DyLight 594-conjugated tomato lectin, and loaded with the membrane-permeant green fluorescent dye, Fluo-8L-AM for measurements of intracellular calcium [Ca2+]i. HFM and BV-2 cells were primed with lipopolysaccharide and then exposed to either human amylin or soluble oligomeric Aß1-42 prior to treatment with and without the amylin receptor antagonist, AC253. Changes in the inflammasome complex, NLRP3 and caspase-1, were examined in treated cell cultures with Western blot and fluorometric assays. RT-PCR measurements were performed to assess cytokine release. Finally, in vivo studies were performed in transgenic mouse model of AD (5xFAD) to examine the effects of systemic administration of AC253 on markers of neuroinflammation in the brain. RESULTS: Acute applications of human amylin or Aß1-42 resulted in an increase in [Ca2+]i that could be blocked by the amylin receptor antagonist, AC253. Activation of the NLRP3 and caspase-1 and subsequent release of cytokines, TNFα and IL-1ß, was diminished by AC253 pretreatment of HFMs and BV2 cells. In vivo, intraperitoneal administration of AC253 resulted in a reduction in microglial markers (Iba-1 and CD68), caspase-1, TNFα, and IL-1ß. These reductions in inflammatory markers were accompanied by reduction in amyloid plaque and size in the brains of 5xFAD mice compared to controls. CONCLUSION: Microglial amylin receptors mediate Aß-evoked inflammation, and amylin receptor antagonists therefore offer an attractive therapeutic target for intervention in AD.


Assuntos
Peptídeos beta-Amiloides/toxicidade , Inflamação/induzido quimicamente , Microglia/efeitos dos fármacos , Microglia/metabolismo , Fragmentos de Peptídeos/toxicidade , Receptores de Polipeptídeo Amiloide de Ilhotas Pancreáticas/metabolismo , Doença de Alzheimer/genética , Doença de Alzheimer/patologia , Doença de Alzheimer/terapia , Animais , Caspase 1/metabolismo , Linhagem Celular Transformada , Células Cultivadas , AMP Cíclico/metabolismo , Citocinas/genética , Citocinas/metabolismo , Feminino , Feto/citologia , Regulação da Expressão Gênica/efeitos dos fármacos , Regulação da Expressão Gênica/genética , Humanos , Lipopolissacarídeos/toxicidade , Masculino , Camundongos , Camundongos Transgênicos , Proteína 3 que Contém Domínio de Pirina da Família NLR/metabolismo , Peptídeos Cíclicos/farmacologia , Peptídeos Cíclicos/uso terapêutico
11.
Cancer Control ; 24(2): 147-160, 2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-28441369

RESUMO

BACKGROUND: Cardiac magnetic resonance imaging (MRI) is emerging as an important diagnostic modality in the management of cardiovascular-related dysfunction in oncological diseases. Advances in imaging techniques have enhanced the detection and evaluation of cardiac masses; meanwhile, innovative applications have created a growing role for cardiac MRI for the management of cardiotoxicity caused by cancer therapies. METHODS: An overview is provided of the clinical indications and technical considerations of cardiac MRI. Its role in the evaluation of cardiac masses and cardiac function is reviewed, and novel sequences are discussed that are giving rise to future directions in cardio-oncology research. A review of the literature was also performed, focusing on cardiac MRI findings associated with cardiac dysfunction related to cancer treatment. RESULTS: Cardiac MRI can be used to differentiate benign and malignant primary cardiac tumors, metastatic disease, and pseudotumors with high spatial and temporal resolution. Cardiac MRI can also be used to detect the early and long-term effects of cardiotoxicity related to cancer therapy. This is accomplished through a multiparametric approach that uses conventional bright blood, dark blood, and postcontrast sequences while also considering the applicability of newer T1 and T2 mapping sequences and other emerging techniques. CONCLUSIONS: Cardio-oncology programs have an expanding presence in the multidisciplinary approach of cancer care. Consequently, knowledge of cardiac MRI and its potential applications is critical to the success of contemporary cancer diagnostics and cancer management.


Assuntos
Cardiotoxicidade/diagnóstico , Doenças Cardiovasculares/diagnóstico , Coração/fisiopatologia , Imageamento por Ressonância Magnética/efeitos adversos , Humanos , Oncologia/métodos , Neoplasias/tratamento farmacológico
12.
Lancet ; 385 Suppl 1: S14, 2015 Feb 26.
Artigo em Inglês | MEDLINE | ID: mdl-26312836

RESUMO

BACKGROUND: Retinal development normally involves migration of the inner retinal layers away from the fovea, migration of the cone photoreceptors into the fovea, and elongation of the photoreceptors over time. This process is arrested prematurely in albinism. However, because retinal development continues at least until the age of 4 years, when development arrests in albinism is uncertain. In this study we outlined the time course of retinal development in children with albinism. METHODS: We studied 44 children with a diagnosis of albinism and 223 control participants. All participants were aged between 0 and 6 years. We obtained 219 mixed cross-sectional and longitudinal optical coherence tomography examinations in the albinism group and compared them with 558 control examinations. Retinal layer segmentation was performed with ImageJ software. Generalised linear mixed regression modelling was used to analyse group differences in retinal development. FINDINGS: In the albinism group, inner retinal layer migration from the fovea was delayed and arrested prematurely, resulting in a significantly thicker central macular thickness than in the control group (p<0·0001). Whereas the central macular thickness increased with age in the control group, in the albinism group it initially decreased with age as a result of continuing regression of the inner retinal layers (p=0·041). The perifoveal retinal thickness was significantly decreased in albinism from a reduction of both inner (p<0·0001) and outer (p<0·0001) retinal layer thicknesses. There was evidence that the photoreceptor layers across the fovea were elongating in albinism, albeit at a reduced rate, compared with the control group. This difference was most apparent for the foveal photoreceptor inner segment (p=0·001). INTERPRETATION: Our findings show that perturbations exist in several aspects of retinal development including the migration and differentiation of the neuronal cells within the retina. We showed continuing regression of the inner retinal layers and elongation of the photoreceptor layers suggesting residual plasticity of the developing albino retina. This finding is important because treatment at the earliest stages of the condition might normalise retinal development and optimise vision. FUNDING: UK Medical Research Council (grant number MR/J004189/1), Ulverscroft Foundation, National Eye Research Centre, Nystagmus Network UK.

13.
Ophthalmology ; 123(10): 2147-57, 2016 10.
Artigo em Inglês | MEDLINE | ID: mdl-27521172

RESUMO

PURPOSE: To determine feasibility of optic nerve head (ONH) imaging and to characterize ONH development in full-term infants without sedation using handheld spectral-domain optical coherence tomography (SD OCT). DESIGN: Prospective cross-sectional study. PARTICIPANTS: Three hundred fifty-two children aged between 1 day and 13 years. METHODS: All participants were imaged using handheld SD OCT without sedation during a single scan session. The percentage of successful scans was calculated. Interexaminer reproducibility and differences between right and left eyes were assessed using intraclass correlation coefficients (ICCs). Images were analyzed using ImageJ software. The developmental trajectories over time for ONH parameters were calculated using fractional polynomial modelling. MAIN OUTCOME MEASURES: Disc and cup diameter (expressed as distance in micrometers and visual angle in degrees), cup depth, Bruch's membrane opening-minimum rim width (BMO-MRW), retinal thickness, and retinal nerve fiber layer (RNFL; 1700 µm and 6° from the disc center). RESULTS: On average, 70% of participants were imaged successfully. Interexaminer reliability was excellent (ICC, >0.89) for diametric and retinal thickness parameters. Right and left eyes were similar for diametric measurements (ICC, >0.79), but more variable for nasal BMO-MRW, RNFL, and retinal thickness. The mean disc and cup diameter increase by 30% and 40%, respectively, between birth and 13 years of age when expressed as a distance measure, but remained constant (at 5°-5.5° and 2°, respectively) when expressed as a visual angle with reference to the eye nodal point. The peripapillary temporal RNFL demonstrated a marked initial decrease of nearly 35% between birth and approximately 18 months of age. This was followed by a slow increase up to 12 years of age when measured at 1700 µm from the disc center, although there was little change when measured at 6° from the disc center. CONCLUSIONS: We demonstrated feasibility of handheld SD OCT imaging of the ONH in full-term infants and children without anaesthesia or sedation. This is the first in vivo handheld SD OCT study to describe the development of ONH parameters during the critical early years of visual maturation. Our results provide a normative database for use in routine practice and further studies of ONH pathologic features.


Assuntos
Disco Óptico/crescimento & desenvolvimento , Tomografia de Coerência Óptica/instrumentação , Adolescente , Criança , Pré-Escolar , Estudos Transversais , Desenho de Equipamento , Estudos de Viabilidade , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Disco Óptico/diagnóstico por imagem , Estudos Prospectivos , Valores de Referência , Reprodutibilidade dos Testes , Células Ganglionares da Retina/citologia
14.
J Card Fail ; 22(6): 465-71, 2016 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-27038642

RESUMO

There is an increasing awareness and clinical interest in cardiac safety during cancer therapy as well as in optimally addressing cardiac issues in cancer survivors. Although there is an emerging expertise in this area, known as cardio-oncology, there is a lack of organization in the essential components of contemporary training. This proposal, an international consensus statement organized by the International Cardioncology Society and the Canadian Cardiac Oncology Network, attempts to marshal the important ongoing efforts for training the next generation of cardio-oncologists. The necessary elements are outlined, including the expectations for exposure necessary to develop adequate training. There should also be a commitment to local, regional, and international education and research in cardio-oncology as a requirement for advancement in the field.


Assuntos
Cardiologia/educação , Doenças Cardiovasculares/terapia , Consenso , Educação de Pós-Graduação em Medicina/métodos , Oncologia/educação , Sociedades Médicas , Canadá , Humanos , Relações Interprofissionais
15.
Drug Metab Dispos ; 44(8): 1399-423, 2016 08.
Artigo em Inglês | MEDLINE | ID: mdl-27052879

RESUMO

Under the guidance of the International Consortium for Innovation and Quality in Pharmaceutical Development (IQ), scientists from 20 pharmaceutical companies formed a Victim Drug-Drug Interactions Working Group. This working group has conducted a review of the literature and the practices of each company on the approaches to clearance pathway identification (fCL), estimation of fractional contribution of metabolizing enzyme toward metabolism (fm), along with modeling and simulation-aided strategy in predicting the victim drug-drug interaction (DDI) liability due to modulation of drug metabolizing enzymes. Presented in this perspective are the recommendations from this working group on: 1) strategic and experimental approaches to identify fCL and fm, 2) whether those assessments may be quantitative for certain enzymes (e.g., cytochrome P450, P450, and limited uridine diphosphoglucuronosyltransferase, UGT enzymes) or qualitative (for most of other drug metabolism enzymes), and the impact due to the lack of quantitative information on the latter. Multiple decision trees are presented with stepwise approaches to identify specific enzymes that are involved in the metabolism of a given drug and to aid the prediction and risk assessment of drug as a victim in DDI. Modeling and simulation approaches are also discussed to better predict DDI risk in humans. Variability and parameter sensitivity analysis were emphasized when applying modeling and simulation to capture the differences within the population used and to characterize the parameters that have the most influence on the prediction outcome.


Assuntos
Descoberta de Drogas/normas , Indústria Farmacêutica/normas , Enzimas/metabolismo , Modelos Teóricos , Preparações Farmacêuticas/metabolismo , Animais , Biotransformação , Simulação por Computador , Árvores de Decisões , Descoberta de Drogas/métodos , Interações Medicamentosas , Humanos , Cinética , Preparações Farmacêuticas/química , Medição de Risco , Especificidade da Espécie , Especificidade por Substrato
16.
J Thromb Thrombolysis ; 39(4): 434-42, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-25079971

RESUMO

The objective of this study was to assess deep vein thrombosis and pulmonary embolism (DVT/PE) recurrence rates and resource utilization among patients with an initial DVT or PE event across multiple payer perspectives. Retrospective analyses were performed using a software tool that analyzes health plan claims to evaluate treatment patterns and resource utilization for various cardiovascular conditions. Six databases were analyzed from three payer perspectives (Commercial, Medicare, and Medicaid). Patients were ≥18 years old with a primary diagnosis of DVT or PE associated with an inpatient and/or emergency room claim, had received an antithrombotic within 7 days before or 14 days after index, and had no diagnosis of atrial fibrillation during follow-up. Outcomes were assessed over a 1 year period following index. More PE patients were hospitalized for their index event than DVT patients (42-59 % DVT and 69-86 % PE) and had longer mean length of stay (2.35-2.95 days DVT and 3.26-3.76 days PE). Recurrent event rates among PE patients (12-32 %) were higher than those for DVT patients (6-16 %) across all payers. The highest rate of recurrence was observed among the Medicaid population [23 % overall (VTE); 16 % DVT; 32 % PE]. All-cause hospitalization in the year following their VTE episode occurred in 23-67 % DVT patients and 30-68 % PE patients. Medicaid had the highest proportion of patients with hospitalizations and ER visits. Recurrent VTE events and all-cause hospitalizations are relatively common, especially for patients who had a PE, and among those in the Medicaid payer population.


Assuntos
Bases de Dados Factuais , Hospitalização/economia , Revisão da Utilização de Seguros , Medicaid , Embolia Pulmonar/economia , Trombose Venosa/economia , Adolescente , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Embolia Pulmonar/terapia , Recidiva , Estados Unidos , Trombose Venosa/terapia
17.
BMC Nurs ; 14: 8, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25705123

RESUMO

BACKGROUND: A nursing shortage in the United States has resulted in increased workloads, potentially affecting the quality of care. This situation is particularly concerning in long-term care (LTC) facilities, where residents are older, frailer, and may be receiving multiple medications for comorbidities, thus requiring a greater commitment of nurse time. We conducted a survey of LTC nurses to determine how much of their time each week is spent managing newly started and stable warfarin-treated residents. METHODS: Forty LTC nurses validated the questionnaire to determine what protocols/procedures are involved in warfarin management. Twenty LTC nurses completed the survey, quantifying the time they spend on procedures related to warfarin management, and how often they performed each procedure for each resident each week. RESULTS: The nurses reported that 26% of their residents were receiving warfarin; the majority (approximately 75%) of these residents began warfarin after admission to the facility. On average, the nurses spent 4.6 hours per week for treatment procedures and monitoring patients initiating warfarin therapy and 2.35 hours per week for each resident who was stable on warfarin therapy on admission. Overall, to care for an average number of newly initiated and stable warfarin patients in a medium-size LTC facility, staff nurses are estimated to spend 68 hours per week. Study limitations include the potential for bias because of the small sample size, representativeness of the sample, and the possibility of inaccuracies in respondents' self-reported time estimation of warfarin-related procedures. CONCLUSIONS: In the context of a well-documented and expanding nursing shortage in the United States, the substantial use of time and resources necessary to initiate, monitor, and manage warfarin treatment in elderly LTC patients is of concern. Until the problem of understaffing is resolved, implementation of therapies that are simpler and require less nursing time-e.g. the use of new oral anticoagulants in the place of warfarin-may be a way to free up nursing time for other essential care tasks.

18.
BMC Health Serv Res ; 14: 329, 2014 Jul 28.
Artigo em Inglês | MEDLINE | ID: mdl-25069459

RESUMO

BACKGROUND: Oral anticoagulation is recommended for stroke prevention in intermediate/high stroke risk atrial fibrillation (AF) patients. The objective of this study was to demonstrate the usefulness of analytic software tools for descriptive analyses of disease management in atrial AF; a secondary objective is to demonstrate patterns of potential anticoagulant undertreatment in AF. METHODS: Retrospective data analyses were performed using the Anticoagulant Quality Improvement Analyzer (AQuIA), a software tool designed to analyze health plan data. Two-year data from five databases were analyzed: IMS LifeLink (IMS), MarketScan Commercial (MarketScanCommercial), MarketScan Medicare Supplemental (MarketScanMedicare), Clinformatics™ DataMart, a product of OptumInsight Life Sciences (Optum), and a Medicaid Database (Medicaid). Included patients were ≥ 18 years old with a new or existing diagnosis of AF. The first observed AF diagnosis constituted the index date, with patient outcomes assessed over a one year period. Key study measures included stroke risk level, anticoagulant use, and frequency of International Normalized Ratio (INR) monitoring. RESULTS: High stroke risk (CHADS2 ≥ 2 points) was estimated in 54% (IMS), 22% (MarketScanCommercial), 64% (MarketscanMedicare), 42% (Optum) and 62% (Medicaid) of the total eligible population. Overall, 35%, 29%, 38%, 39% and 16% of all AF patients received an anticoagulant medication in IMS, MarketScanCommercial, MarketScanMedicare, Optum and Medicaid, respectively. Among patients at high risk for stroke, 19% to 51% received any anticoagulant. CONCLUSIONS: The AQuIA provided a consistent platform for analysis across multiple AF populations with varying baseline characteristics. Analyzer results show that many high-risk AF patients in selected commercial, Medicare-eligible, and Medicaid populations do not receive appropriate thromboprophylaxis, as recommended by treatment guidelines.


Assuntos
Anticoagulantes/administração & dosagem , Fibrilação Atrial/tratamento farmacológico , Acidente Vascular Cerebral/prevenção & controle , Varfarina/administração & dosagem , Idoso , Idoso de 80 Anos ou mais , Anticoagulantes/efeitos adversos , Fibrilação Atrial/complicações , Bases de Dados Factuais , Feminino , Hospitalização/estatística & dados numéricos , Humanos , Masculino , Medicaid , Medicare , Pessoa de Meia-Idade , Seleção de Pacientes , Estudos Retrospectivos , Acidente Vascular Cerebral/etiologia , Estados Unidos , Varfarina/efeitos adversos
19.
Healthc (Amst) ; 12(1): 100733, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38194745

RESUMO

Electronic health records (EHRs) have provided physicians with user-friendly self-service reporting tools to extract patient data from the EHR. Despite such benefits, physician training on how to use these tools has been limited. At our institution, physicians were faced with prolonged wait time for EHR data extraction requests and were unaware of self-service reporting tool availability in the EHR. Our goal was to develop an EHR data reporting curriculum for physicians and staff and examine the effectiveness of such training. In 2019, physician informaticists developed two interactive sessions to train physicians and staff on self-service reporting tools (Epic® SlicerDicer and Reporting Workbench (RWB)) available in our tertiary children's hospital EHR. We assessed participants' knowledge, confidence, and tool utilization before, after, and 3-months post training via survey. Training sessions occurred between April and August 2021. Thirty-six participants completed the study, with 25 surveys collected immediately post and 22 surveys collected at 3-months post training. Data literacy knowledge pre-test average score improved from 62% to 93% (p < 0.05) immediately post-session and 74% at 3-months post assessment (p = 0.05). Regular tool utilization increased from 29% (RWB) and 34% (SlicerDicer) pre-session to 56% and 44% at 3-months post, respectively. Participants reported increased confidence in performing SlicerDicer model selection, criteria selection, and data visualization as well as RWB report navigation, report creation, report visualization, and describing report's benefits/limitations. Ultimately, physician and staff self-service reporting tools training were effective in increasing data literacy knowledge, tool utilization, and confidence.


Assuntos
Registros Eletrônicos de Saúde , Médicos , Humanos , Criança , Inquéritos e Questionários , Currículo , Autorrelato
20.
J Grad Med Educ ; 16(1): 64-69, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38304600

RESUMO

Background Medical trainees must learn how to provide effective feedback as an essential communication skill, yet few models exist for training and assessing these skills. Objective To develop an observed structured feedback examination (OSFE) to provide feedback training to pediatric fellows and assess changes in skills and self-reported confidence. Methods This educational study was conducted from 2019 to 2020 at an academic children's hospital. Our team developed the OSFE and trained standardized feedback recipients and faculty. Fellows completed baseline self-assessments (31 items) on prior exposure to feedback training, application of skills, and confidence. They then participated in the OSFE, giving feedback to a standardized recipient using a standardized scenario, and were scored by faculty and recipients using a 15-item checklist for performance. Next, fellows participated in feedback training and received individualized feedback, after which they repeated the OSFE and confidence self-assessment. Three months later, fellows completed self-assessments on confidence and application of skills and another OSFE to assess retention. Descriptive statistics and signed rank sum test were used for analysis. Results Of 60 eligible fellows, 19 participated (32%), with 100% follow-up. After training and individualized feedback, all fellows improved feedback skills as measured by OSFE performance (mean change +0.89). All items, measured on a 5-point Likert scale, were sustained 3 months later (mean change +0.92). All fellows reported improved confidence in feedback knowledge (mean change +2.07 post, +1.67 3 months post). Conclusions Feedback training using simulation and individualized feedback moderately improved fellows' performance, confidence, and 3-month retention of feedback skills.


Assuntos
Internato e Residência , Humanos , Criança , Retroalimentação , Currículo , Competência Clínica , Educação de Pós-Graduação em Medicina/métodos , Bolsas de Estudo
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA