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1.
Clin Toxicol (Phila) ; : 1-10, 2024 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-39350754

RESUMEN

INTRODUCTION: Poisoning is a leading cause of morbidity and mortality that is increasing in many countries. Better data are needed to understand epidemiology and outcomes of poisoning. This work describes a new poisoning data linkage cohort in New South Wales, Australia (population approximately 8 million). METHODS: This is a longitudinal health record linkage, 2011-2020, including data from: ambulance call-outs, emergency department presentations, hospital admissions, death registrations, the poisons centre, and four tertiary toxicology units. Individuals with poisoning, venomous animal/plant exposures, or adverse drug reaction events were included. RESULTS: There were 845,217 linkable events relating to 400,642 ambulance, 688,484 emergency department, 682,013 admission, 40,456 toxicology, and 11,879 death records. There were 572,841 people with events; the median age at the time of first event was 57 years, and 51.9% were female. Events leading to patient admission were most commonly adverse drug reactions (n = 511,263), intentional poisonings (n = 68,646), unintentional poisonings (n = 54,840) and animal/plant exposures (n = 11,092). Demographics varied by cause: intentional poisoning (median age 33 years, 64% female); unintentional poisoning/animals/plants (median age 43 years, 45%); and adverse drug reactions (median age 70 years, 54%). Adolescent females had highest rates of intentional poisoning, while unintentional poisoning had a bimodal distribution, highest in children <5 years old and males aged 20 to 50 years. Substance use disorders were documented comorbidities for 44% of intentional poisoning, 29% of unintentional poisoning, and 13% of adverse drug reaction-related admissions; mood disorders were documented for 54%, 17% and 10% of these admissions, respectively. DISCUSSION: Poisonings and hospitalised adverse drug reactions are common in New South Wales, affecting approximately 8% of the population in 10 years. This linkage improves understanding of poisoning risks and outcomes in Australia. CONCLUSIONS: This novel data linkage provides a unique opportunity to study poisoning across multiple settings for an individual over an extended period.

2.
JAMA Netw Open ; 7(8): e2426209, 2024 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-39106063

RESUMEN

Importance: Deliberate self-poisoning using pesticides as a means of suicide is an important public health problem in low- and middle-income countries. Three highly toxic pesticides-dimethoate, fenthion, and paraquat-were removed from the market in Sri Lanka between 2008 and 2011. In 2015, less toxic pesticides (chlorpyrifos, glyphosate, carbofuran, and carbaryl) were restricted. Subsequent outcomes have not been well described. Objective: To explore the association of pesticide bans with pesticide self-poisonings and in-hospital deaths. Design, Setting, and Participants: In this cross-sectional study with an interrupted time series design, data were prospectively collected on all patients with deliberate self-poisonings presenting to 10 Sri Lankan hospitals between March 31, 2002, and December 31, 2019, and analyzed by aggregated types of poisoning. The correlates of pesticide bans were estimated within the pesticide group and on self-poisonings within other substance groups. The data analysis was performed between April 1, 2002, and December 31, 2019. Exposures: Implementation of 2 sets of pesticide bans. Main Outcomes and Measures: The main outcomes were changes in hospital presentations and in-hospital deaths related to pesticide self-poisoning as measured using segmented Poisson regression. Results: A total of 79 780 patients (median [IQR] age, 24 [18-34] years; 50.1% male) with self-poisoning from all causes were admitted to the study hospitals, with 29 389 poisonings (36.8%) due to pesticides. A total of 2859 patients died, 2084 (72.9%) of whom had ingested a pesticide. The first restrictions that targeted acutely toxic, highly hazardous pesticides were associated with an abrupt and sustained decline of the proportion of poisonings with pesticides (rate ratio [RR], 0.85; 95% CI, 0.78-0.92) over the study period and increases in poisonings with medications (RR, 1.11; 95% CI, 1.02-1.21) and household and industrial chemicals (RR, 1.20; 95% CI, 1.05-1.36). The overall case fatality of pesticides significantly decreased (RR, 0.33; 95% CI, 0.26-0.42) following the implementation of the 2008 to 2011 restrictions of highly hazardous pesticides. Following the 2015 restrictions of low-toxicity pesticides, hospitalizations were unchanged, and the number of deaths increased (RR, 1.98; 95% CI, 1.39-2.83). Conclusions and Relevance: These findings support the restriction of acutely toxic pesticides in resource-poor countries to help reduce hospitalization for and deaths from deliberate self-poisonings and caution against arbitrary bans of less toxic pesticides while more toxic pesticides remain available.


Asunto(s)
Plaguicidas , Humanos , Sri Lanka/epidemiología , Plaguicidas/envenenamiento , Masculino , Femenino , Estudios Transversales , Adulto , Persona de Mediana Edad , Intoxicación/epidemiología , Intoxicación/mortalidad , Suicidio/estadística & datos numéricos , Mortalidad Hospitalaria , Adulto Joven , Análisis de Series de Tiempo Interrumpido , Intento de Suicidio/estadística & datos numéricos , Adolescente , Estudios Prospectivos
3.
Public Opin Q ; 88(SI): 781-813, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39109093

RESUMEN

Do Donald Trump's attacks on voting by mail influence how some Canadians view mail-in ballots? The Trump effect on views and behaviors surrounding voting by mail has been well documented in the United States. North of the border, more Canadians than ever voted by mail in the last general election. In this study, we consider how right-wing populism is associated with trust in voting by mail among Canadians. Specifically, we seek to test two main hypotheses. First, we consider whether Canadians holding populist views-and, in particular, those holding right-wing populist views (would-be Trump supporters)-are less trusting of voting by mail. Second, we consider whether political media exposure amplifies this association. We analyze data from both the 2021 Canadian Election Study and Democracy Checkup Survey. We find that those who hold populist views clearly have less trust in voting by mail. This is especially true among right-leaning individuals. Furthermore, as in the United States, this effect is moderated by one's level of political media exposure, with higher levels of political media exposure amplifying the effect of populist views on trust in voting by mail. Our findings, therefore, suggest that the politicization of mail-in voting by President Trump has important implications for the legitimacy of the electoral system not only in the United States, but also in Canada and potentially in other parts of the world.

4.
Clin Toxicol (Phila) ; 62(4): 219-228, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38738692

RESUMEN

INTRODUCTION: Intermediate syndrome is an important cause of respiratory failure following acute organophosphorus pesticide poisoning. The objective of this study was to examine the pathophysiology of this syndrome by analysis of sequential repetitive nerve stimulation studies in patients with acute organophosphorus pesticide poisoning. METHODS: Thirty-four consenting symptomatic patients with acute organophosphorus pesticide poisoning with intermediate syndrome (n = 10) or a milder forme fruste intermediate syndrome (n = 24) were assessed prospectively with daily physical examination and repetitive nerve stimulation done on the right and left median and ulnar nerves. The compound muscle action potential at 1, 3, 10, 15, 20 and 30 Hertz was measured with a train of ten stimuli. The amplitudes of the resulting stimuli were normalized to the first stimulus (100 per cent) and plotted against time. The decrease in the area under the curve of all the second stimulus compound muscle action potentials in the first 0.3 seconds was measured as a means of quantifying the refractory block. The decrease in the area under the curve under the 10, 15, 20 and 30 Hertz compound muscle action potentials relative to this pooled second stimulus compound muscle action potentials-area under the curve indicated the extent of additional rate-dependent block (decreasing compound muscle action potential-area under the curve over the first 0.3 seconds after the first stimulus with increasing Hertz). RESULTS: These new measurements strongly correlated with the severity of weakness. Refractory block was seen in most patients but was more severe in those with intermediate syndrome than those with forme fruste (partial) intermediate syndrome (median 55 per cent versus 16 per cent, P = 0.0001). Similar large differences were found for rate-dependent block (30 per cent versus 7 per cent, P = 0.001), which was uncommon in forme fruste intermediate syndrome but found in nine out of 10 patients with intermediate syndrome. Rate dependent block was generally only observed after 24 hours. The simplest strong predictor was total block at 30 Hertz repetitive nerve stimulation (89 per cent [interquartile range 73 to 94 per cent] versus 21 per cent [4 to 55 per cent]; P < 0.0001), which was very similar to total block calculated by summing other calculations. DISCUSSION: These findings likely represent depolarization and desensitization block from prolonged excessive cholinergic stimulation but it is not clear if these are from pre- or post-synaptic pathology. An animal model of intermediate syndrome with repetitive nerve stimulation studies might enable a better pathophysiological understanding of the two types of block. LIMITATIONS: The limited number of repetitive nerve stimulation studies performed were sufficient to demonstrate proof-of-concept, but further studies with more patients are needed to better define the correlates, clinical relevance and possible diagnostic/prognostic roles for the use of this technique. CONCLUSION: There are two easily distinguishable pathophysiological abnormalities in the neuromuscular block in intermediate syndrome. While they often coincide, both may be observed in isolation. The total and rate-dependent block at 30 Hertz are strongly associated with more severe weakness.


Asunto(s)
Potenciales de Acción , Estimulación Eléctrica , Unión Neuromuscular , Intoxicación por Organofosfatos , Humanos , Intoxicación por Organofosfatos/fisiopatología , Masculino , Adulto , Femenino , Persona de Mediana Edad , Potenciales de Acción/efectos de los fármacos , Unión Neuromuscular/fisiopatología , Unión Neuromuscular/efectos de los fármacos , Estudios Prospectivos , Adulto Joven , Nervio Mediano/fisiopatología , Nervio Cubital/fisiopatología , Insuficiencia Respiratoria/fisiopatología , Insuficiencia Respiratoria/inducido químicamente , Insuficiencia Respiratoria/etiología , Anciano
6.
Intern Med J ; 54(6): 925-931, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38263859

RESUMEN

BACKGROUND: There are few reports on drug use in patients while hospitalised and none regarding management or clinical outcomes. AIMS: To describe cases of drug use by inpatients requiring an urgent clinical response. METHODS: We retrospectively reviewed cases at a teaching hospital in Sydney, Australia, from February 2019 to March 2021. RESULTS: Thirty cases were identified, with no deaths. Two patient groups were identified: (i) substance use disorders, using illicit drugs and (ii) self-harm history, using prescribed or over-the-counter drugs. Management involved cardiac monitoring (40%), intensive care (30%), charcoal (20%), antidotes (20%) and intubation (13%). Discharge was planned in 22 of 30 patients, against medical advice in four and directed by medical staff in four. CONCLUSIONS: Inpatient drug use requiring an urgent clinical response was infrequently recognised but presents a risk of harm to patients and staff and increases service utilisation and costs. Both harm reduction and systematic approaches guided by institutional policy are recommended. Using these events as reachable moments to address driving factors may modify patients' risk from future events.


Asunto(s)
Hospitalización , Trastornos Relacionados con Sustancias , Humanos , Masculino , Femenino , Estudios Retrospectivos , Trastornos Relacionados con Sustancias/terapia , Trastornos Relacionados con Sustancias/epidemiología , Persona de Mediana Edad , Adulto , Anciano , Australia/epidemiología , Adulto Joven
7.
Sleep ; 47(1)2024 01 11.
Artículo en Inglés | MEDLINE | ID: mdl-37503934

RESUMEN

STUDY OBJECTIVES: Transient arousal from sleep has been shown to elicit a prolonged increase in genioglossus muscle activity that persists following the return to sleep and which may protect against subsequent airway collapse. We hypothesized that this increased genioglossal activity following return to sleep after an arousal is due to persistent firing of inspiratory-modulated motor units (MUs) that are recruited during the arousal. METHODS: Thirty-four healthy participants were studied overnight while wearing a nasal mask with pneumotachograph to measure ventilation and with 4 intramuscular genioglossus EMG electrodes. During stable N2 and N3 sleep, auditory tones were played to induce brief (3-15s) AASM arousals. Ventilation and genioglossus MUs were quantified before the tone, during the arousal and for 10 breaths after the return to sleep. RESULTS: A total of 1089 auditory tones were played and gave rise to 239 MUs recorded across arousal and the return to sleep in 20 participants (aged 23 ±â€…4.2 years and BMI 22.5 ±â€…2.2 kg/m2). Ventilation was elevated above baseline during arousal and the first post-arousal breath (p < .001). Genioglossal activity was elevated for five breaths following the return to sleep, due to increased firing rate and recruitment of inspiratory modulated MUs, as well as a small increase in tonic MU firing frequency. CONCLUSIONS: The sustained increase in genioglossal activity that occurs on return to sleep after arousal is primarily a result of persistent activity of inspiratory-modulated MUs, with a slight contribution from tonic units. Harnessing genioglossal activation following arousal may potentially be useful for preventing obstructive respiratory events.


Asunto(s)
Apnea Obstructiva del Sueño , Humanos , Electromiografía , Sueño/fisiología , Nivel de Alerta/fisiología , Respiración
8.
J Gastroenterol Hepatol ; 39(5): 920-926, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38149309

RESUMEN

BACKGROUND AND AIM: Paracetamol, a widely used medication, is known for its delayed hepatotoxicity in cases of overdose. However, the potential for intestinal toxicity resulting from very high paracetamol concentrations during absorption is not well explored. This study aims to investigate the presence of intestinal toxicity and its correlation with observations in early and late paracetamol toxicity. METHODS: Serial samples of 30 patients with acute paracetamol overdose (> 10 g or 200 mg/kg) were prospectively tested. Markers of enterocyte damage, including plasma intestinal fatty acid binding protein (IFABP) and selected gut-related microRNAs (miR-21, miR-122, miR-194, and miR-215), were analyzed. Sub-analysis was performed on patients presenting with hyperlactatemia defined as a lactate greater than 2 mmol/L within 12 h post ingestion. RESULTS: In paracetamol overdose patients, median plasma IFABP was significantly elevated compared with healthy controls (720 µg/L [interquartile range, IQR, 533-1644] vs 270 µg/L [IQR 153-558], P < 0.001). Four patients had early hyperlactatemia and had significantly higher median plasma IFABP compared with those without early hyperlactatemia (3028 µg/L [IQR 1399-3556] vs 574 µg/L [IQR 526-943], P = 0.007). Furthermore, two microRNAs (miR-122 and miR-215) were downregulated in early hyperlactatemia (P = 0.019 and P = 0.006, respectively). Plasma IFABP concentrations correlated with paracetamol concentration (Spearman's r = 0.55) and lactate (r = 0.60). CONCLUSIONS: Paracetamol overdose causes concentration-related intestinal toxicity, and this is a possible explanation for the early hyperlactatemia syndrome. Intestinal toxicity has potential impacts on pharmacokinetics of other agents ingested and on the evolution of hepatotoxicity. Further studies are required to explore the mechanisms and prognostic implications of intestinal toxicity.


Asunto(s)
Acetaminofén , Biomarcadores , Sobredosis de Droga , MicroARNs , Acetaminofén/envenenamiento , Acetaminofén/sangre , Humanos , Masculino , Femenino , Adulto , Biomarcadores/sangre , MicroARNs/sangre , Proteínas de Unión a Ácidos Grasos/sangre , Persona de Mediana Edad , Analgésicos no Narcóticos/envenenamiento , Analgésicos no Narcóticos/sangre , Hiperlactatemia/inducido químicamente , Hiperlactatemia/sangre , Estudios Prospectivos , Ácido Láctico/sangre , Adulto Joven , Enterocitos/metabolismo
9.
Front Sports Act Living ; 5: 1287400, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38090044

RESUMEN

Women play a vital role in professional sport on and off the field. Globally, the dearth of women high-performance coaches in sport is a concern. For example, in Australia women represent 15% of high-performance coaches. One reason could be due to the lack of knowledge on good organizational practices that encourage women in this role and the overwhelming knowledge of practices focused on barriers for women high-performance coaches. The purpose of our research was to determine what good organizational practices exist to attract, develop, and retain women as high-performance coaches in Australia. Using a qualitative research design, semi-structured interviews were conducted with two study groups that comprised 16 women high-performance coaches and 13 senior managers from five National Sport Organizations (NSOs) in Australia. Data analysis was guided by practices that influenced the attraction, development, and retention of women high-performance coaches. Practically, findings revealed 12 good organizational practices and 31 associated recommendations to assist senior managers from NSOs in their quest to encourage women high-performance coaches in their sport. Theoretically, our research "reverses the lens" of the Ecological Intersectional Model (EIM) at the organizational level whereby the focus turns to good organizational practices rather than barriers for women high-performance coaches.

10.
Pers Soc Psychol Bull ; : 1461672231214629, 2023 Dec 12.
Artículo en Inglés | MEDLINE | ID: mdl-38084428

RESUMEN

As more of our lives take place online, it is increasingly common for public figures to have their current image tarnished by their mistakes and transgressions in what is often the distant past. Three experiments (N = 2,296) found that judgments of a public figure who tweeted racist statements in the past were less harsh when more time had passed and when the public figure was younger at the time of the tweet. However, politics also played a powerful role. Independent of time and age, liberals allowed less possibility of redemption for anti-Black tweets, while conservatives were less forgiving for anti-White tweets. Such partisan differences extended not only to moral judgments of the individual, but also general moral principles and participants' subjective perceptions of the situation itself, including subjective temporal distance from the tweet, the subjective age of the public figure, and the current relevance of the past statements.

11.
Glob Health Action ; 16(1): 2273625, 2023 Dec 31.
Artículo en Inglés | MEDLINE | ID: mdl-37971492

RESUMEN

Risky alcohol use is a major public health problem globally and in Sri Lanka. While a reduction in alcohol consumption can result in physical, mental, and social benefits, behaviour change is difficult to achieve. Effective, context-adapted interventions are required to minimise alcohol-related harm at a community level. THEATRE is a complex, community-based intervention evaluating whether a promising Sri Lankan pilot study that utilised arts-based research to moderate alcohol use can be scaled up. While the scaled-up pilot study protocol is presented elsewhere, the aim of this protocol paper is to describe the intervention programme theory and evaluation design, and modifications made to the study resulting from COVID-19 and the financial crisis. Drawing on the Behaviour Change Wheel (BCW) and Theoretical Domains Framework, behaviour change theories are presented with potential pathways to guide implementation and evaluation. Alcohol consumption patterns and context of drinking is detailed. The multifaceted intervention targets individuals and communities using arts-based interventions. Four of nine BCW functions are employed in the design of the intervention: education, persuasion, modelling and enablement, and training. Modifications made to the study due to COVID-19 and the financial crisis are described. Ethical approval was obtained from the Ethics Review Committee, Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka (ERC/2018/21-July 2018 and Feb 2022) and the University of Sydney (2019/006). Findings will be disseminated locally to community members and key stakeholders and via international peer-reviewed publications.


Asunto(s)
COVID-19 , Educación en Salud , Humanos , Sri Lanka/epidemiología , Proyectos Piloto , Terapia Conductista , COVID-19/prevención & control
12.
Clin Toxicol (Phila) ; 61(9): 693-696, 2023 09.
Artículo en Inglés | MEDLINE | ID: mdl-37831053

RESUMEN

INTRODUCTION: Intestinal toxicity can occur following ingestion of various drugs, chemicals, and toxins. Intestinal fatty acid binding protein is a cytosolic protein specific to intestinal epithelial cells released into the systemic circulation following intestinal injury. Understanding intestinal toxicity in poisoning has the potential to explain mechanisms of toxicity and gastrointestinal symptoms. METHODS: Plasma samples were retrospectively analysed for intestinal fatty acid binding protein in 25 healthy controls and in those poisoned with Gloriosa superba (n = 18), Thevetia peruviana (n = 26), organophosphates (in various solvents) (n = 17), paracetamol (n = 14), glyphosate (n = 20), 2-methyl-4-chlorophenoxyacetic acid (n = 18) and propanil (n = 19). RESULTS: Median peak plasma intestinal fatty acid binding protein concentrations were significantly higher in patients poisoned with Gloriosa superba (2,994.1 µg/L; interquartile range 600.0-5,158.2, P < 0.001), Thevetia peruviana (1,292.5 µg/L; interquartile range 760.3 - 2,076.2; P < 0.001), glyphosate (1,803.6 µg/L; interquartile range 225.7-8,927.7; P < 0.001), 2-methyl-4-chlorophenoxyacetic acid (1,236.2 µg/L; interquartile range 192.6 - 1,709.7; P = 0.010), paracetamol (1,066.5 µg/L; interquartile range 512.9 - 1,336.9; P = 0.035), and organophosphate poisoning (729.8 µg/L; interquartile range 431.5 - 1,588.2; P = 0.046) than in healthy controls (221.6 µg/L; interquartile range 134.8 - 460.1). Median intestinal fatty acid binding protein was not statistically significantly increased compared to controls after propanil poisoning (630.0 µg/L; interquartile range 23.5 - 1,390.3; P = 0.423). CONCLUSIONS: Our pilot study describes intestinal injury assessed by elevated plasma intestinal fatty acid binding protein concentrations following the ingestion of several poisons. This serves as a foundation for further exploration into enterocyte damage in toxicology.


Asunto(s)
Ácido 2-Metil-4-clorofenoxiacético , Propanil , Humanos , Estudios Retrospectivos , Acetaminofén , Proyectos Piloto , Biomarcadores , Proteínas de Unión a Ácidos Grasos
13.
Int J Drug Policy ; 121: 104178, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37776604

RESUMEN

BACKGROUND: There is growing concern, globally, regarding use of nitrous oxide (N2O) for intoxication purposes. This paper aims to examine trends in: (i) past six month N2O use among a sample of people who use regularly use ecstasy and/or other illicit stimulants (2003-2020); (ii) volume of N2O-related Google searches and social media posts (2009-2020); and (iii) N2O-related calls to Poisons Information Centres (PIC) (2004-2020). METHODS: Data were obtained from annual interviews with sentinel samples of Australians aged ≥16 years who used ecstasy and/or other illicit stimulants ≥monthly and resided in a capital city (∼800 each year); Google search activity; social media posts; and exposure calls to four PIC. RESULTS: Among samples of people who regularly use ecstasy and/or other illicit stimulants, past six-month N2O use increased 10% each year from 2009 to 2020, with the sharpest increase observed between 2015 and 2018 (25.4% p/year; 95% CI: 14.6-37.1). Frequency and quantity of N2O use remained stable and low. Google search probabilities increased by 1.8% each month from January 2009 and December 2019 (95% CI: 1.5-2.2), with the sharpest increase observed between July 2016 to December 2017 (6.0% p/month; 95% CI: 4.4-7.5). Social media posts increased 2.0% per month from January 2009 and December 2019 (95% CI: 1.1-3.0), with the sharpest increase observed between March and October 2017 (19.2% p/month; 95% CI: 1.7-39.7). The number of N2O-related calls to Australian PIC increased sixfold between 2016 (16) and 2020 (111). CONCLUSIONS: Triangulation of various data sources indicate significant shifts in N2O use and harms in Australia. This includes increases in use, Google searches and social media posts, although these have plateaued in recent years, coupled with increased rates of harm. These findings correspond with evidence of a global increase in N2O use and harm, highlighting the need for education of both people who use N2O and health professionals.


Asunto(s)
Estimulantes del Sistema Nervioso Central , N-Metil-3,4-metilenodioxianfetamina , Humanos , Óxido Nitroso/efectos adversos , Fuentes de Información , Australia/epidemiología
14.
J Phys Chem A ; 127(30): 6191-6203, 2023 Aug 03.
Artículo en Inglés | MEDLINE | ID: mdl-37467488

RESUMEN

A series of pyrazinepyrene-fused zinc phthalocyanines (ZnPc-Pyrn) have been newly synthesized by reacting quinoxaline and the corresponding diamino-functionalized phthalocyanines as a new class of π-extended phthalocyanine systems. Bathochromically shifted absorption as a function of the number of pyrazinepyrene entities due to extended π-conjugation and quenched fluorescence due to the presence of fused pyrazinepyrene were witnessed. The electronic structures of these phthalocyanines were probed by systematic computational and electrochemical studies, while the excited-state properties were examined by pump-probe spectroscopies operating at the femto- and nanosecond time scales. Similar to the excited singlet lifetimes, the excited triplet states also revealed diminished lifetimes with an increased number of pyrazinepyrene entities. Further, the coordinatively unsaturated zinc in these molecules was coordinated with phenyl imidazole-functionalized fullerene, ImC60, to form a new series of donor-acceptor conjugates. Upon full characterization of these conjugates, the occurrence of excited-state charge separation was established by transient pump-probe spectroscopy, covering wide temporal and spatial regions. The lifetime of the final charge-separated states was ∼2 ns and decreased with an increase in the number of fused pyrazinepyrene units.

15.
BMJ Open ; 13(6): e064722, 2023 06 15.
Artículo en Inglés | MEDLINE | ID: mdl-37321807

RESUMEN

INTRODUCTION: Alcohol consumption is a leading cause of mortality, morbidity and adverse social sequelae in Sri Lanka. Effective community-based, culturally adapted or context-specific interventions are required to minimise these harms. We designed a mixed-methods stepped wedge cluster randomised control trial of a complex alcohol intervention. This paper describes the initial trial protocol and subsequent modifications following COVID-19. METHODS AND ANALYSIS: We aimed to recruit 20 villages (approximately n=4000) in rural Sri Lanka. The proposed intervention consisted of health screening clinics, alcohol brief intervention, participatory drama, film, and public health promotion materials to be delivered over 12 weeks.Following disruptions to the trial resulting from the Easter bombings in 2019, COVID-19 and a national financial crisis, we adapted the study in two main ways. First, the interventions were reconfigured for hybrid delivery. Second, a rolling pre-post study evaluating changes in alcohol use, mental health, social capital and financial stress as the primary outcome and implementation and ex-ante economic analysis as secondary outcomes. ETHICS AND DISSEMINATION: The original study and amendments have been reviewed and granted ethical approval by Rajarata University of Sri Lanka (ERC/2018/21-July 2018 and February 2022) and the University of Sydney (2019/006). Findings will be disseminated locally in collaboration with the community and stakeholders.The new hybrid approach may be more adaptable, scalable and generalisable than the planned intervention. The changes will allow a closer assessment of individual interventions while enabling the evaluation of this discontinuous event through a naturalistic trial design. This may assist other researchers facing similar disruptions to community-based studies. TRIAL REGISTRATION: The trial is registered with the Sri Lanka Clinical Trials Registry; https://slctr.lk/trials/slctr-2018-037.


Asunto(s)
COVID-19 , Humanos , Sri Lanka/epidemiología , COVID-19/epidemiología , COVID-19/prevención & control , Educación en Salud , Consejo/métodos , Consumo de Bebidas Alcohólicas/prevención & control
16.
Infant Ment Health J ; 44(4): 480-494, 2023 07.
Artículo en Inglés | MEDLINE | ID: mdl-37339006

RESUMEN

The development of infant mental health (IMH) services globally is still in its early stages. This qualitative study aims to understand the challenges of setting up IMH services and explores the views and experiences of 14 multi-disciplinary stakeholders who are part of the IMH implementation group in a large Scottish health board. Six major themes were identified through thematic analysis. This paper examines the most prominent theme "Systems" alongside the theme "Gaps in Current Service". The theoretical framework of "candidacy" is found to be a valuable way to conceptualize the complex systemic layers of micro, meso, and macro factors that contribute to the challenges of setting up services. At the micro level, key themes included the view that services must be accessible, individualized, and involve families. At the meso level, in line with the aims of the service, multiagency integration, aspects of early intervention, and clear operating conditions were all seen as important. Finally, at the macro level, perhaps the biggest challenge perceived by stakeholders is delivering a service that is entirely infant-focused. These findings will help inform policy makers about factors considered by professionals to be vital in the establishment of IMH services in Scotland and across the globe.


El desarrollo de los servicios de salud mental infantil (IMH) globalmente está aún en sus niveles básicos. Este estudio cualitativo se propone comprender los retos de establecer los servicios IMH y explora los puntos de vista y experiencias de 14 personas interesadas de múltiples disciplinas que son parte de un grupo de implementación de IMH dentro de una extensa junta de salud escocesa. A través de análisis temáticos se identificaron seis temas de mayor importancia. Este estudio examina el tema más prominente según la mayor percepción, "Sistemas," junto con el tema "Vacíos en la Actual Prestación de Servicio." Se estima que el marco teorético de trabajo de "candidatura," es una manera valiosa de conceptualizar los complejos niveles sistémicos de micro, medio y macro factores que contribuyen a los retos de establecer los servicios. Al nivel micro, los temas claves incluyen el punto de vista de que los servicios deben ser accesibles, individualizados y deben involucrar a las familias. Al nivel medio, alineados con las metas del servicio, la integración de agencias múltiples, aspectos de temprana intervención y claras condiciones operativas fueron todas estimadas como importantes. Finalmente, al nivel macro, quizás el mayor reto percibido por las personas interesadas es cumplir con el ofrecimiento de un servicio que esté enteramente enfocado en el infante. Estos resultados ayudarán a informar a quienes determinan las políticas a seguir acerca de los factores que los profesionales consideran vitales en el establecimiento de servicios IMH en Escocia y alrededor del globo.


Au niveau global, le développement de service de santé mentale du nourrisson et de la petite enfance en est encore à ses débuts. Cette étude qualitative s'est donnée pour but de comprendre les défis que pose l'installation de services IMH. Elle explore les vues et les perspectives de 14 parties prenantes de diverses disciplines qui font partie d'un groupe de mise en place IMH dans un grand conseil de santé en Ecosse. Six thèmes principaux ont été identifiés au travers une analyse thématique. Cet article examine le thème ayant été perçu comme le plus grand et proéminent, Systèmes, ainsi que le thème « Brèches dans les services actuels ¼. La structure théorique de la 'candidature' a été utilisée pour trouver une manière utile de conceptualiser les couches systémiques complexes de facteurs micro, méso, et macro qui contribuent aux défis qu'il y a dans l'installation de services. Au niveau micro, les thèmes clés ont inclus l'idée que les services doivent être accessibles, individualisés et engager les familles. Au niveau méso, s'alignant avec les buts du service, l'intégration de plusieurs agences, les aspects d'une intervention précoce et des conditions d'opération claires ont tous été estimé être importants. Enfin, au niveau macro, le défi étant peut-être le plus grand selon les parties prenantes est d'offrir un service qui est entièrement focalisé sur le nourrisson. Ces résultats aideront les décideurs pour ce qui s'agit des facteurs considérés comme étant vitaux par les professionnels pour ce qui concerne l'établissement de services IMH en Ecosse et au travers du globe.


Asunto(s)
Servicios de Salud del Niño , Servicios de Salud Mental , Humanos , Lactante , Niño , Salud Mental , Intervención Educativa Precoz , Salud del Lactante
17.
BMC Med Educ ; 23(1): 390, 2023 May 27.
Artículo en Inglés | MEDLINE | ID: mdl-37245040

RESUMEN

BACKGROUND: Snakebite is a global health problem that predominantly occurs in rural areas. In Sri Lanka, the majority of snakebite patients first present to smaller rural primary hospitals. Improving care delivered at rural hospitals has the potential to reduce morbidity and mortality from snakebites. OBJECTIVE: In this study, we evaluated whether an educational intervention would increase compliance with national snakebite treatment guidelines in primary hospitals. METHODS: The hospitals were randomized into educational intervention (n = 24) and control groups (n = 20). The intervention hospitals received a brief educational intervention based on Sri Lankan Medical Association (SLMA) guidelines on the management of snakebites. Control hospitals had free access to the guidelines but no additional promotion. Four outcomes were assessed: pre- and post-test knowledge at the completion of a one-day workshop of educational intervention (intervention group only); improvement in the quality of the patient's medical records; appropriateness of transfers to higher hospitals; and quality of overall management graded by a blinded expert. The data was collected over a period of 12 months. RESULTS: All case notes of snakebite hospital admissions were reviewed. There were 1021 cases in the intervention group hospitals and 1165 cases in the control hospitals. Four hospitals in the intervention group and three hospitals in the control group did not have snakebite admissions and were excluded from the cluster analysis. The absolute quality of care was high in both groups. Post-test knowledge was improved (p < 0.0001) following the intervention group's educational workshop. There was no statistical difference between the two groups in terms of clinical data documentation in hospital notes (scores, p = 0.58) or transfer appropriateness (p = 0.68)-both of which were significantly different from the guidelines. CONCLUSION: Education of primary hospital staff improved the immediate knowledge gained but did not improve record-keeping or the appropriateness of inter-hospital patient transfer. TRIAL REGISTRATION: The study was registered with Sri Lanka Medical Associations' clinical trial registry. Reg. No SLCTR -2013-023. Registered: 30/07/2013.


Asunto(s)
Mordeduras de Serpientes , Humanos , Mordeduras de Serpientes/terapia , Hospitales Rurales , Sri Lanka , Hospitalización , Personal de Hospital
18.
Crisis ; 44(4): 309-317, 2023 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-36073254

RESUMEN

Aims: We investigated the association between problematic use of alcohol and/or drugs (PUAD) and the incidence, urgency, and mode of discharge for a subsequent episode of self-harm (SH) or suicidal ideation (SI). Methods: This was a retrospective population-based cohort study of individuals admitted to hospital for an index episode of SH/SI (2010-2014) using linked data from hospital admissions and emergency department (ED) presentations. The outcome variables were (1) subsequent presentation to the ED for SH/SI, (2) triage category, and (3) mode of departure. Key predictors were PUAD. Results: In total, 23,007 individuals were admitted to hospital for an index SH/SI, of whom 8% had a subsequent presentation to an ED for SH/SI within a year. The odds of subsequent presentation was increased in those with problematic alcohol use (AOR 1.62, 95% CI 1.36, 1.92), drug use (AOR 1.28, 95% CI 1.07, 1.53), and mental health diagnoses (AOR 1.63, 95% CI 1.44, 1.85). Those with problematic alcohol use were more likely to be assigned to the most urgent triage categories (AOR 1.84, 95% CI 1.32, 2.56). Limitations: Defining SH and PUAD using administrative data is challenging, and the true prevalence is likely to be underestimated. Conclusion: The findings underscore the importance of drug health intervention as a key component of self-harm prevention.


Asunto(s)
Conducta Autodestructiva , Trastornos Relacionados con Sustancias , Humanos , Ideación Suicida , Estudios Retrospectivos , Estudios de Cohortes , Conducta Autodestructiva/epidemiología , Conducta Autodestructiva/psicología , Trastornos Relacionados con Sustancias/epidemiología , Servicio de Urgencia en Hospital
19.
Exp Physiol ; 108(3): 491-502, 2023 03.
Artículo en Inglés | MEDLINE | ID: mdl-36533973

RESUMEN

NEW FINDINGS: What is the central question of this study? How does alcohol intake, which worsens obstructive sleep apnoea, alter motor control of the genioglossus muscle, an upper airway dilator, in healthy awake human volunteers, and does alcohol alter genioglossus muscle afterdischarge? What is the main finding and its importance? Alcohol consumption had a very minor effect on the activity of the genioglossus in healthy young individuals studied during wakefulness and did not alter afterdischarge, leaving open the possibility that alcohol worsens obstructive sleep apnoea via other mechanisms. ABSTRACT: Alcohol worsens obstructive sleep apnoea (OSA). This effect is thought to be due to alcohol's depressant effect on upper airway dilator muscles such as the genioglossus, but how alcohol reduces genioglossal activity is unknown. The aim of this study was to investigate the effect of alcohol consumption on genioglossus muscle single motor units (MUs). Sixteen healthy individuals were studied on two occasions (alcohol: breath alcohol concentration ∼0.07% and placebo). They were instrumented with a nasal mask, four intramuscular genioglossal EMG electrodes, and an ear oximeter. They were exposed to 8-12 hypoxia trials (45-60 s of 10% O2 followed by one breath of 100% O2 ) while awake. MUs were sorted according to their firing patterns and quantified during baseline, hypoxia and recovery. For the alcohol and placebo conditions, global muscle activity (mean ± SD peak inspiratory EMG = 119.3 ± 44.1 and 126.5 ± 51.9 µV, respectively, P = 0.53) and total number of MUs recorded at baseline (68 and 67, respectively) were similar. Likewise, the peak discharge frequency did not differ between conditions (21.2 ± 4.28 vs. 22.4 ± 4.08 Hz, P = 0.09). There was no difference between conditions in the number (101 vs. 88, respectively) and distribution of MU classes during hypoxia, and afterdischarge duration was also similar. In this study, alcohol had a very minor effect on genioglossal activity and afterdischarge in these otherwise healthy young individuals studied while awake. If similar effects are observed during sleep, it would suggest that the worsening of OSA following alcohol may be related to increased upper airway resistance/nasal congestion or arousal threshold changes.


Asunto(s)
Apnea Obstructiva del Sueño , Vigilia , Femenino , Humanos , Masculino , Electromiografía , Músculos Faciales , Hipoxia , Tráquea , Vigilia/fisiología
20.
PLoS One ; 17(11): e0277179, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36327315

RESUMEN

Voters evaluate political candidates not only based on their recent record but their history, often faced with weighing the relevance of long-past misdeeds in current appraisal. How should a distant transgression be taken to reflect on the present? Across multiple years, political figures and incidents, we found that people's subjective perceptions of time concerning political candidate's histories can differ radically, regardless of objective fact; political bias shapes people's perception of the time of things past. Results showed that despite equidistant calendar time, people subjectively view a favored politician's successes and opposing politician's failures as much closer in time, while a favored politician's failures and opponent's success seem much further away. Studies 1-3 tested the proposed phenomena across distinct (real and hypothetical) political contexts, while Study 4 tested the causal effects of temporal distance framing. Study 5 provided a final preregistered test of the findings. Overall, we demonstrate that partisans can protect their candidates and attack opponents by shifting their perception of time.


Asunto(s)
Política , Humanos
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