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1.
BMC Health Serv Res ; 22(1): 623, 2022 May 09.
Artículo en Inglés | MEDLINE | ID: mdl-35534889

RESUMEN

BACKGROUND: Cardiology care may be beneficial for risk factor management in people living with HIV (PLWH), yet limited information is available about the referral process from the perspectives of HIV specialists and cardiologists. METHODS: We conducted 28 qualitative interviews at academic medical centers in the United States from December 2019 to February 2020 using components of the Specialty Referral Process Framework: referral decision, entry into referral care, and care integration. We analyzed the data using applied thematic analysis. RESULTS: Reasons for cardiology referral most commonly included secondary prevention, uncontrolled risk factors, cardiac symptoms, and medication management. Facilitators in the referral process included ease of referral, personal relationships between HIV specialists and cardiologists, and close proximity of the clinic to the patient's home. Barriers included lack of transportation, transportation costs, insurance coverage gaps, stigma, and patient reluctance. CONCLUSIONS: Our results will inform future studies on implementation strategies aimed at improving the specialty referral process for PLWH. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT04025125 .


Asunto(s)
Cardiólogos , Infecciones por VIH , Infecciones por VIH/tratamiento farmacológico , Humanos , Investigación Cualitativa , Derivación y Consulta , Especialización , Estados Unidos
2.
Euro Surveill ; 26(14)2021 04.
Artículo en Inglés | MEDLINE | ID: mdl-33834961

RESUMEN

IntroductionStandard testing for infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is based on RT-PCR tests, but detection of viral genetic material alone does not indicate ongoing infectious potential. The ability to isolate whole virus represents a better proxy for infectivity.AimThe objective of this study was to gain an understanding of the current literature and compare the reported periods of positive SARS-CoV-2 detection from studies that conducted RT-PCR testing in addition to experiments isolating whole virus.MethodsUsing a rapid review approach, studies reporting empirical data on the duration of positive RT-PCR results and/or successful viral isolation following SARS-CoV-2 infection in humans were identified through searches of peer-reviewed and pre-print health sciences literature. Articles were screened for relevance, then data were extracted, analysed, and synthesised.ResultsOf the 160 studies included for qualitative analysis, 84% (n = 135) investigated duration of positive RT-PCR tests only, 5% (n = 8) investigated duration of successful viral isolations, while 11% (n = 17) included measurements on both. There was significant heterogeneity in reported data. There was a prolonged time to viral clearance when deduced from RT-PCR tests compared with viral isolations (median: 26 vs 9 days).DiscussionFindings from this review support a minimum 10-day period of isolation but certain cases where virus was isolated after 10 days were identified. Given the extended time to viral clearance from RT-PCR tests, future research should ensure standard reporting of RT-PCR protocols and results to help inform testing policies aimed at clearance from isolation.


Asunto(s)
COVID-19 , SARS-CoV-2 , COVID-19/prevención & control , COVID-19/transmisión , COVID-19/virología , Prueba de Ácido Nucleico para COVID-19 , Humanos , Aislamiento de Pacientes , SARS-CoV-2/genética , SARS-CoV-2/aislamiento & purificación , SARS-CoV-2/patogenicidad , Factores de Tiempo
3.
Adv Neonatal Care ; 21(1): 41-48, 2021 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-33278102

RESUMEN

BACKGROUND: The worsening opioid crisis has increased the number of infants exposed to maternal opioids. Standard treatment of newborns exposed to opioids prenatally often requires prolonged hospitalization and separation of the mother-infant dyad. These practices can potentially increase severity of withdrawal symptoms, interrupt breastfeeding, and disturb mother-infant bonding. Use of the Eat, Sleep, Console (ESC) model may ameliorate symptoms, decrease mother-infant separation, and decrease hospital length of stay. PURPOSE: To manage opioid exposed infants in a more holistic manner to decrease neonatal intensive care unit (NICU) admissions, reduce the need for pharmacotherapy, and evaluate response and total length of treatment after a unit protocol change from morphine to buprenorphine. METHODS: Implemented ESC model, optimized nonpharmacologic bundle, and prescribed buprenorphine therapy instead of morphine as needed for adjunctive therapy. RESULTS: Admissions of opioid-exposed infants from the Mother-Baby Unit (MBU) to the NICU decreased by 22%, and the number of infants who required pharmacotherapy was reduced by 50%. The average length of pharmacotherapy fell from 14 to 6.5 days. IMPLICATIONS FOR PRACTICE: The successful implementation of the ESC model helped keep the mother-infant dyad together, reduced admissions to the NICU, and lessened the need for pharmacotherapy. The change to buprenorphine further reduced our average length of treatment. IMPLICATIONS FOR RESEARCH: Investigation of monotherapy with buprenorphine needs to be evaluated as a valid treatment option. The buprenorphine dosing and weaning chart will need to be revised and modified if indicated.


Asunto(s)
Síndrome de Abstinencia Neonatal , Trastornos Relacionados con Opioides , Complicaciones del Embarazo , Síndrome de Abstinencia a Sustancias , Analgésicos Opioides/uso terapéutico , Buprenorfina/uso terapéutico , Femenino , Humanos , Recién Nacido , Tiempo de Internación , Madres , Síndrome de Abstinencia Neonatal/tratamiento farmacológico , Trastornos Relacionados con Opioides/tratamiento farmacológico , Embarazo , Sueño , Síndrome de Abstinencia a Sustancias/tratamiento farmacológico
4.
Environ Sci Technol ; 51(13): 7667-7675, 2017 Jul 05.
Artículo en Inglés | MEDLINE | ID: mdl-28535063

RESUMEN

Human exposure to persistent perfluoroalkyl acids (PFAAs), including perfluorooctanoic acid (PFOA), perfluorononanoic acid (PFNA), and perfluorooctanesulfonate (PFOS), can occur directly from contaminated food, water, air, and dust. However, precursors to PFAAs (PreFAAs), such as dipolyfluoroalkyl phosphates (diPAPs), fluorotelomer alcohols (FTOHs), perfluorooctyl sulfonamides (FOSAs), and sulfonamidoethanols (FOSEs), which can be biotransformed to PFAAs, may also be a source of exposure. PFAAs were analyzed in 50 maternal sera samples collected in 2007-2008 from participants in Vancouver, Canada, while PFAAs and PreFAAs were measured in matching samples of residential bedroom air collected by passive sampler and in sieved vacuum dust (<150 µm). Concentrations of PreFAAs were higher than for PFAAs in air and dust. Positive associations were discovered between airborne 10:2 FTOH and serum PFOA and PFNA and between airborne MeFOSE and serum PFOS. On average, serum PFOS concentrations were 2.3 ng/mL (95%CI: 0.40, 4.3) higher in participants with airborne MeFOSE concentrations in the highest tertile relative to the lowest tertile. Among all PFAAs, only PFNA in air and vacuum dust predicted serum PFNA. Results suggest that airborne PFAA precursors were a source of PFOA, PFNA, and PFOS exposure in this population.


Asunto(s)
Exposición a Riesgos Ambientales , Fluorocarburos/análisis , Adulto , Ácidos Alcanesulfónicos , Canadá , Caprilatos , Polvo , Femenino , Vivienda , Humanos , Embarazo
5.
J Occup Environ Hyg ; 12(3): 145-55, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-25587876

RESUMEN

Flight attendants were exposed to elevated levels of secondhand smoke (SHS) in commercial aircraft when smoking was allowed on planes. During flight attendants' working years, their occupational SHS exposure was influenced by various factors, including the prevalence of active smokers on planes, fliers' smoking behaviors, airplane flight load factors, and ventilation systems. These factors have likely changed over the past six decades and would affect SHS concentrations in commercial aircraft. However, changes in flight attendants' exposure to SHS have not been examined in the literature. This study estimates the magnitude of the changes and the historic trends of flight attendants' SHS exposure in U.S. domestic commercial aircraft by integrating historical changes of contributing factors. Mass balance models were developed and evaluated to estimate flight attendants' exposure to SHS in passenger cabins, as indicated by two commonly used tracers (airborne nicotine and particulate matter (PM)). Monte Carlo simulations integrating historical trends and distributions of influence factors were used to simulate 10,000 flight attendants' exposure to SHS on commercial flights from 1955 to 1989. These models indicate that annual mean SHS PM concentrations to which flight attendants were exposed in passenger cabins steadily decreased from approximately 265 µg/m(3) in 1955 and 1960 to 93 µg/m(3) by 1989, and airborne nicotine exposure among flight attendants also decreased from 11.1 µg/m(3) in 1955 to 6.5 µg/m(3) in 1989. Using duration of employment as an indicator of flight attendants' cumulative occupational exposure to SHS in epidemiological studies would inaccurately assess their lifetime exposures and thus bias the relationship between the exposure and health effects. This historical trend should be considered in future epidemiological studies.


Asunto(s)
Contaminantes Ocupacionales del Aire/análisis , Aeronaves , Exposición Profesional/análisis , Contaminación por Humo de Tabaco/análisis , Medicina Aeroespacial , Historia del Siglo XX , Humanos , Modelos Teóricos , Método de Montecarlo , Nicotina/análisis , Exposición Profesional/estadística & datos numéricos , Material Particulado/análisis , Estados Unidos
6.
Artículo en Inglés | MEDLINE | ID: mdl-37160576

RESUMEN

BACKGROUND: Underrepresented racial and ethnic groups (UREGs) with HIV have a higher risk of cardiovascular disease (CVD) compared with the general population. Referral to a cardiovascular specialist improves CVD risk factor management in high-risk individuals. However, patient and provider factors impacting the likelihood of UREGs with HIV to have an encounter with a cardiologist are unknown. METHODS: We evaluated a cohort of UREGs with HIV and borderline CVD risk (10-year risk ≥ 5% by the pooled cohort equations or ≥ 7.5% by Framingham risk score). Participants received HIV-related care from 2014-2020 at four academic medical centers in the United States (U.S.). Adjusted Cox proportional hazards regression was used to estimate the association of patient and provider characteristics with time to first ambulatory cardiology encounter. RESULTS: A total of 2,039 people with HIV (PWH) and borderline CVD risk were identified. The median age was 45 years (IQR: 36-50); 52% were female; and 94% were Black. Of these participants, 283 (14%) had an ambulatory visit with a cardiologist (17% of women vs. 11% of men, p < .001). In fully adjusted models, older age, higher body mass index (BMI), atrial fibrillation, multimorbidity, urban residence, and no recent insurance were associated with a greater likelihood of an encounter with a cardiologist. CONCLUSION: In UREGs with HIV and borderline CVD risk, the strongest determinants of a cardiology encounter were diagnosed CVD, insurance type, and urban residence. Future research is needed to determine the extent to which these encounters impact CVD care practices and outcomes in this population. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT04025125.

7.
Br J Educ Technol ; 52(4): 1538-1553, 2021 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-34219753

RESUMEN

This paper addresses the research problem of how to reach, engage and support parents in home-educating young children during the first national COVID-19 lockdown in England (March-June 2020), which was addressed through using technology. An internet-mediated research (IMR) approach is used to investigate the effectiveness of using technology and translational research as strategies for disseminating a rapidly produced digital guide, for promoting play-based learning at home, to parents. Lockdown with the closure of early years provision led to parents finding themselves isolated at home with young children. Early years educators were managing a unique set of circumstances where communication with families, including those 'harder-to-reach' was contextually problematic. Qualitative data using IMR captured online interactions by unobtrusive and obtrusive methods; unsolicited emails and social media comments and questionnaire responses. Conventional content analysis identified emerging themes of access, availability, reliability and readability. Analysis showed a combination of factors impacted on the speed and scale of sharing and downloading the digital guide. First, being digitally ready as platforms were already used by early years educators and Local Authorities. Second, the professional drive of Local Authorities and early years educators to support families during the crisis and third, the availability of an easily accessible online resource seen as valuable in improving play-based learning at home.

8.
Epilepsia ; 51(10): 2011-22, 2010 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-20608963

RESUMEN

PURPOSE: Absence seizures cause transient impairment of consciousness. Typical absence seizures occur in children, and are accompanied by 3-4-Hz spike-wave discharges (SWDs) on electroencephalography (EEG). Prior EEG-functional magnetic resonance imaging (fMRI) studies of SWDs have shown a network of cortical and subcortical changes during these electrical events. However, fMRI during typical childhood absence seizures with confirmed impaired consciousness has not been previously investigated. METHODS: We performed EEG-fMRI with simultaneous behavioral testing in 37 children with typical childhood absence epilepsy (CAE). Attentional vigilance was evaluated by a continuous performance task (CPT), and simpler motor performance was evaluated by a repetitive tapping task (RTT). RESULTS: SWD episodes were obtained during fMRI scanning from 9 patients among the 37 studied. fMRI signal increases during SWDs were observed in the thalamus, frontal cortex, primary visual, auditory, somatosensory, and motor cortex, and fMRI decreases were seen in the lateral and medial parietal cortex, cingulate gyrus, and basal ganglia. Omission error rate (missed targets) with SWDs during fMRI was 81% on CPT and 39% on RTT. For those seizure epochs during which CPT performance was impaired, fMRI changes were seen in cortical and subcortical structures typically involved in SWDs, whereas minimal changes were observed for the few epochs during which performance was spared. DISCUSSION: These findings suggest that typical absence seizures involve a network of cortical-subcortical areas necessary for normal attention and primary information processing. Identification of this network may improve understanding of cognitive impairments in CAE, and may help guide development of new therapies for this disorder.


Asunto(s)
Encéfalo/fisiopatología , Electroencefalografía/estadística & datos numéricos , Epilepsia Tipo Ausencia/fisiopatología , Imagen por Resonancia Magnética/estadística & datos numéricos , Adolescente , Mapeo Encefálico , Corteza Cerebral/fisiopatología , Niño , Trastornos de la Conciencia/diagnóstico , Trastornos de la Conciencia/fisiopatología , Electroencefalografía/métodos , Epilepsia Tipo Ausencia/diagnóstico , Femenino , Humanos , Imagen por Resonancia Magnética/métodos , Masculino , Destreza Motora/fisiología , Vías Nerviosas/fisiopatología , Oxígeno/sangre , Desempeño Psicomotor/fisiología , Tálamo/fisiopatología
9.
Can J Nurs Res ; 42(3): 30-49, 2010 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-21086775

RESUMEN

The social environments and activities of homeless youth frequently create a downward spiral, leading to drug abuse and survival sex as well as self-harm behaviours and suicidality. This study employed a mixed-methods approach to assess the mental health challenges and strengths of street-involved youth. A convenience sample of 70 homeless young people completed a series of standardized questionnaires evaluating mental health symptoms as well as resilience and self-esteem. Two focus groups were also held to capture the perceived mental health needs of street-involved youth. These young people (aged 16-24) were found to have high levels of mental health symptoms compared to other groups of young adults. However, they also exhibited moderately high levels of resilience and self-esteem. Therefore, multi-component mental health programs and interventions that address both strengths and challenges may well help street-involved youth to work towards social re-integration and, ultimately, improved quality of life.


Asunto(s)
Jóvenes sin Hogar , Servicios de Salud Mental/organización & administración , Salud Mental , Adolescente , Adulto , Atención Integral de Salud , Grupos Focales , Humanos , Ontario , Encuestas y Cuestionarios , Adulto Joven
11.
Sci Total Environ ; 619-620: 1409-1419, 2018 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-29734617

RESUMEN

BACKGROUND: Biomarkers of the reproductive and neuro-developmental toxicants mercury (Hg), lead (Pb) and cadmium (Cd) have been found at higher concentrations in women born outside Canada than in Canadian-born women. We measured blood Hg, Pb and Cd in women ages 19 to 45years living in greater Vancouver (Canada) within five years of their arrival from South Asia (India) or East Asia (mainland China, Hong Kong and Taiwan) and related their biomarker concentration levels with exposures and behaviors since their coming to Canada. METHODS: Participants were recruited through advertisements in relevant ethnic media, locations and groups. Concentrations of blood Hg, Pb and Cd were analyzed by inductively coupled plasma-mass spectrometry (ICP-Q-MS) and compared with population values. Biomarker concentrations were regressed against exposures and behaviors assessed by culturally-relevant questionnaire. RESULTS: The study recruited 53 South and 111 East Asian women. Median (95th percentile) blood Pb in South Asians was 1.15 (2.71) µg/dL compared with 1.01 (1.81) µg/dL in East Asians. On the other hand, blood Hg at 2.5 (7.3) µg/L was higher in East Asians compared to 0.20 (0.83) µg/L in South Asians. Blood Cd was also higher in the East Asian group: East 0.53 (1.1) µg/L; South 0.27 (0.82) µg/L. Higher blood Hg was associated with seafood consumption, dental amalgams and traditional remedies; blood Pb with home renovations, sucking on metal jewelry, and cosmetics. Blood Pb and Cd concentrations were inversely associated with dairy consumption. CONCLUSIONS: Asian women recently arrived in Vancouver had higher blood Hg, Pb and Cd concentrations than same-age Canadian women measured in a national survey. Among South Asian newcomer women of reproductive age, exposure to Cd may continue after arrival. Local exposures to Hg occur through seafood and potentially through ingestion of imported traditional remedies.


Asunto(s)
Exposición a Riesgos Ambientales/estadística & datos numéricos , Contaminantes Ambientales/sangre , Metales Pesados/sangre , Adulto , Pueblo Asiatico/estadística & datos numéricos , Colombia Británica/etnología , Cadmio/sangre , Femenino , Humanos , Plomo/sangre , Mercurio/sangre
12.
Prev Chronic Dis ; 3(3): A90, 2006 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-16776891

RESUMEN

INTRODUCTION: Individuals not engaging in recommended amounts of moderate-intensity physical activity are deemed insufficiently active and are at greater risk of chronic disease. Social marketing strategies may promote positive changes in physical activity levels among insufficiently active individuals. METHODS: A quasi-experimental design was used to determine whether the results of a previous communitywide physical activity social marketing campaign conducted in Wheeling, WVa (population, 31,420) could be replicated in the larger community of Broome County, New York (population, 200,536). BC Walks promoted 30 minutes or more of moderate-intensity daily walking among insufficiently active residents of Broome County, New York, aged 40 to 65 years. Promotion activities included paid advertising, media relations, and community health activities. Impact was determined by preintervention and postintervention random-digit-dial cohort telephone surveys in intervention and comparison counties. We assessed demographics, walking behavior, moderate and vigorous physical activity, and campaign awareness. RESULTS: The paid advertising included 4835 television and 3245 radio gross rating points and 10 quarter-page newspaper advertisements. News media relations resulted in 28 television news stories, 5 radio stories, 10 newspaper stories, and 125 television news promotions. Exposure to the campaign was reported by 78% of Broome County survey respondents. Sixteen percent of Broome County participants changed from nonactive to active walkers; 11% changed from nonactive to active walkers in the comparison county (adjusted odds ratio, 1.71; 95% confidence interval, 0.99-2.95). Forty-seven percent of Broome County respondents reported any increase in total weekly walking time, compared with 36% for the comparison county (adjusted odds ratio, 1.66; 95% confidence interval, 1.14-2.44). CONCLUSION: The BC Walks campaign replicated the earlier Wheeling Walks initiative, although increases in walking were smaller in the BC Walks campaign.


Asunto(s)
Servicios de Salud Comunitaria/organización & administración , Actividad Motora , Adulto , Colombia Británica , Servicios de Salud Comunitaria/economía , Humanos , Persona de Mediana Edad , Factores Socioeconómicos
13.
Nurse Educ Today ; 47: 68-73, 2016 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-27288266

RESUMEN

BACKGROUND: In the UK, military veterans will receive care by civilian nurses in civilian hospitals. We propose that the nurses providing this care require an understanding of the unique experiences and specific health needs of veterans to deliver evidence-based care. AIM: To conduct an integrative review of published literature to explore how nursing programmes prepare nurses to care for the military veteran population in civilian hospitals. REVIEW METHODS: A systematic search was undertaken of a range of electronic databases, Google Scholar and hand searching of Military and Veteran health journals. Papers that focused on education of civilian nurses about veteran health and included primary research or description of practice-based innovations were included in the review. RESULTS: The search generated sixteen papers that were focused on nurse education in higher education institutions. Several papers focused on simulation as a teaching method for veteran-specific health issues or curriculum developments with educational innovations such as online courses. Six papers focusing in continuing professional education of nurses in the clinical setting were included as supplementary information. All papers reviewed were US focused and dated between January 2011 and September 2015. Our search concluded that there is a gap in knowledge in this subject area within a UK context, therefore our review includes UK background information to support the US findings. CONCLUSION: Civilian nurses need educational preparation to understand the specific needs of veterans. Educational institutions in the US have responded to nationwide initiatives to undertake that preparation. More empirical studies need to be undertaken to develop, test and evaluate educational innovations for preparing students and nurses delivering care to military veteran in civilian healthcare settings.


Asunto(s)
Competencia Clínica , Trastornos de Combate/enfermería , Personal de Enfermería en Hospital/educación , Atención Dirigida al Paciente/métodos , Heridas y Lesiones/enfermería , Conocimientos, Actitudes y Práctica en Salud , Humanos , Rol de la Enfermera , Guías de Práctica Clínica como Asunto , Calidad de la Atención de Salud , Reino Unido
14.
Nurs Leadersh (Tor Ont) ; 29(2): 82-97, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-27673403

RESUMEN

Members of a nursing research cluster realized that they needed to determine whether, given their diverse philosophies, they could formulate a collective research agenda responding to an administrative recommendation. The cluster's leaders conducted an appraisal of the role and importance of trust as an element for promoting collaboration in a nursing research cluster and for building a collective social identity. The Social Exchange Theory framed the appraisal. A survey and a facilitation session about trust in research partnerships were conducted with eight female nursing researchers/faculty. Facilitation day's discussion was fully audio recorded, transcribed verbatim and the content coded using ATLAS.ti 6. Thematic analysis was employed to analyze the qualitative aspects of the recorded discussion and the survey questionnaire explanatory responses. Responses to survey closed-questions were compiled as descriptive statistics. Participants revealed that mutual support, valuing each other and working collaboratively facilitated trust in intellectual partnership. Hindering factors were an environment suppressing expression of ideas and views, lack of open dialogue and decision-making among team members and lack of a sense of belonging. This paper has the potential to contribute to the knowledge of nursing leaders who are intending to develop and sustain nursing research teams in both academic and non-academic organizations. The paper will be especially useful as they deal with issues of trust in intellectual partnership in diverse settings.


Asunto(s)
Conducta Cooperativa , Docentes de Enfermería , Liderazgo , Investigación en Enfermería , Investigadores/psicología , Confianza , Femenino , Humanos , Grupo de Enfermería
16.
Prev Chronic Dis ; 2(4): A05, 2005 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-16164809

RESUMEN

INTRODUCTION: The purpose of our study was to compare the cost-effectiveness of four strategies using components of 1% Or Less to promote population-based behavior change. 1% Or Less is a mass-media campaign that encourages switching from high-fat (whole or 2%) to low-fat (1% or skim) milk. Using a quasi-experimental design, campaigns were previously conducted in four West Virginia communities using different combinations of 1) paid advertising, 2) media relations, and 3) community-based educational activities. Telephone surveys and supermarket milk sales data were used to measure the campaigns' effectiveness. METHODS: Using data from the previously completed studies, we analyzed the cost of each campaign. We then calculated the cost per person exposed to the campaign and cost per person who switched from high- to low-fat milk. RESULTS: The combination of paid advertising and media relations was the most cost-effective campaign, with a cost of 0.57 dollars per person to elicit a switch from high- to low-fat milk, and the combination of media relations and community-based educational activities was the least cost-effective campaign, with a cost of 11.85 dollars per person to elicit a switch. CONCLUSION: Population-based campaigns using a combination of paid advertising and media relations strategies can be a cost-effective way to promote a behavior change in a community.


Asunto(s)
Conducta Alimentaria , Conductas Relacionadas con la Salud , Educación en Salud/economía , Medios de Comunicación de Masas/economía , Leche , Mercadeo Social , Publicidad , Animales , Conducta de Elección , Análisis Costo-Beneficio , Grasas de la Dieta , Educación en Salud/métodos , Promoción de la Salud/economía , Promoción de la Salud/métodos , Humanos , Leche/economía , Estados Unidos , West Virginia
17.
Arch Ophthalmol ; 120(8): 1055-62, 2002 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-12149059

RESUMEN

OBJECTIVE: To test the hypothesis that function of the rod photoreceptors is abnormal in pediatric patients with mitochondrial disorders. METHODS: Patients (n = 22; median age, 5 years) with a deficiency of 1 or more of the mitochondrial enzyme complexes, or a mutation in mitochondrial DNA, were studied by means of scotopic, full-field electroretinography (ERG). The conditions of ERG testing allowed derivation of the parameters of the activation of rod phototransduction from the ERG a-wave, and postreceptoral function from b-wave and P(2) stimulus-response functions. The deactivation of phototransduction was studied in 5 patients. The patients' ERG responses were compared with those of healthy control subjects (n = 25). RESULTS: Responses from 19 patients were sufficient for analysis of rod photoreceptor and postreceptoral function. Saturated amplitudes of the rod photoresponse and b-wave sensitivity were significantly depressed in the patients. Saturated amplitudes of rod cell and P(2) responses were correlated. The kinetics of deactivation of phototransduction were slowed even if the kinetics of activation were normal. CONCLUSIONS: In patients with mitochondrial disorders, some abnormalities of the scotopic ERG responses originate in the rod photoreceptors, but postreceptoral processes may also be abnormal. From a practical perspective, ERG testing can contribute to diagnosis of mitochondrial disorders.


Asunto(s)
Enfermedades Mitocondriales/fisiopatología , Células Fotorreceptoras Retinianas Bastones/fisiopatología , Adolescente , Niño , Preescolar , ADN Mitocondrial , Adaptación a la Oscuridad , Electrorretinografía , Femenino , Humanos , Lactante , Masculino , Mitocondrias Musculares/enzimología , Oxidorreductasas/metabolismo , Visión Ocular/fisiología
18.
Oecologia ; 66(1): 111-115, 1985 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-28310821

RESUMEN

Effects of pocket gopher (Geomys attwateri) mound-building activity on plant community composition and soil nutrient concentrations were investigated in south Texas on both burned and unburned coastal prairie sites. Pocket gophers deposited large amounts of soil which were lower in nutrient content than randomly-collected samples. Above-ground plant biomass was greater around mounds than in random samples mainly because of increased dicots around mounds on the burned area when compared with random samples on the same area. Pocket gophers may have concentrated their activities (and therefore, mounds) in areas with higher dicot biomass on the burned area since they prefer perennial dicots as food, or the presence of mounds may have ameliorated the apparent negative effect of fire on dicots.

19.
J Occup Environ Med ; 54(3): 336-44, 2012 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-22286235

RESUMEN

OBJECTIVE: As NASA celebrates the 50th anniversary of human spaceflight, we reflect back on the individuals who forged a new way in the frontier of space. METHODS: While much has been written about the astronauts and the systems that got them into space and safely home; less attention has been given to NASA employees and its contractors. NASA has always been conscious of the unique nature of its workforce and its importance to the space program. RESULTS: NASA established a comprehensive occupational health program, which began as part of the Agency's Space Medicine function in the early 1960s. Over the years, this program grew in stature and capability. CONCLUSIONS: This paper traces the history and development of NASA's Occupational Health, highlighting the programs and people who focused their energies on ensuring the health and safety of its workforce.


Asunto(s)
Salud Laboral/historia , United States National Aeronautics and Space Administration/historia , Historia del Siglo XX , Historia del Siglo XXI , Humanos , Estados Unidos , United States National Aeronautics and Space Administration/organización & administración
20.
Neurotoxicology ; 33(2): 246-54, 2012 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-21963523

RESUMEN

We investigated whether early life chronic exposure to woodsmoke, using personal passive 48-h carbon monoxide (CO) as an indicator, is associated with children's neurodevelopmental and behavioral performance. CO measures were collected every 3 months from 2002 to 2005 among mother-child dyads during the Randomized Exposure Study of Pollution Indoors and Respiratory Effects (RESPIRE) stove intervention trial in San Marcos, Guatemala. From March to June, 2010, study children of age 6-7 years, performed a follow-up non-verbal, culturally adapted neurodevelopmental assessment. We found inverse associations between CO exposure of pregnant mothers during their 3rd trimesters (m=3.8ppm ± 3.0ppm; range: 0.6-12.5 ppm) and child neuropsychological performance. Scores on 4 out of 11 neuropsychological tests were significantly associated with mothers' 3rd trimester CO exposures, including visuo-spatial integration (p<0.05), short-term memory recall (p<0.05), long-term memory recall (p<0.05), and fine motor performance (p<0.01) measured using the Bender Gestalt-II's Copy, Immediate Recall, and an adapted version of a Delayed Recall Figures drawing, and the Reitan-Indiana's Finger Tapping Tests, respectively. These 4 significant finding persisted with adjustment for child sex, age, visual acuity, and household assets (socio-economic status). Summary performance scores were also significantly associated with maternal 3rd trimester CO when adjusted for these covariates. Other variables accounting for variance but were excluded in our final multiple regression models included the following: HOME environment stimulation score, child examiner, WHO height-for-age percentile, and age that the infant stopped breastfeeding. This seems to be the first study on woodsmoke exposure and neurodevelopment, and the first longitudinal birth cohort study on chronic early life CO exposures, determined by high quality measures of mothers' and infants' personal CO exposures, and using well-established, reliable child neuropsychological tests. Further research is needed to replicate our results and inform future interventions and air quality standards for woodsmoke and CO.


Asunto(s)
Antimetabolitos/toxicidad , Monóxido de Carbono/toxicidad , Trastornos del Conocimiento/etiología , Discapacidades del Desarrollo/etiología , Efectos Tardíos de la Exposición Prenatal/inducido químicamente , Efectos Tardíos de la Exposición Prenatal/fisiopatología , Adulto , Niño , Discapacidades del Desarrollo/fisiopatología , Femenino , Estudios de Seguimiento , Guatemala/epidemiología , Humanos , Masculino , Pruebas Neuropsicológicas , Embarazo , Estudios Retrospectivos , Población Rural , Estadística como Asunto , Encuestas y Cuestionarios , Adulto Joven
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