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1.
J Card Fail ; 30(3): 516-519, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38000732

RESUMEN

BACKGROUND: The field of Advanced Heart Failure and Transplant Cardiology has evolved greatly since it was first established. We sought to elicit program directors' and fellows' viewpoints on potential curricular deficits so we can better meet the educational goals of current and future fellows. METHODS AND RESULTS: We surveyed advanced heart failure and transplant cardiology program directors and fellows concerning their perceptions of the current adequacy of training and their desire for additional training needed to achieve medical competency in advanced heart failure and transplant cardiology at their institutions, as defined by the 2017 ACC Advanced Training Statement. Survey results identified key competencies deemed to be inadequately addressed during training and those in which a moderate or significant additional amount of training was desired. These competencies were identified within the 4 main domains of the fellowship: heart failure, pulmonary hypertension, mechanical circulatory support, and heart transplantation. CONCLUSIONS: This study highlights key medical-knowledge competencies that are inadequately addressed by current fellowship training in advanced heart failure and transplant cardiology. Fellowship programs should develop curricula that focus on the integration of these competencies into training to ensure that fellows are well equipped to care for patients.


Asunto(s)
Cardiología , Insuficiencia Cardíaca , Trasplante de Corazón , Humanos , Insuficiencia Cardíaca/cirugía , Competencia Clínica , Educación de Postgrado en Medicina/métodos , Encuestas y Cuestionarios , Cardiología/educación
2.
Cardiol Clin ; 41(4): 511-524, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37743074

RESUMEN

The conventional sequence of guideline-directed medical therapy (GDMT) initiation in heart failure with reduced ejection fraction (HFrEF) assumes that the effectiveness and tolerability of GDMT agents mirror their order of discovery, which is not true. In this review, the authors discuss flexible GDMT sequencing that should be permitted in special populations, such as patients with bradycardia, chronic kidney disease, or atrial fibrillation. Moreover, the initiation of certain GDMT medications may enable tolerance of other GDMT medications. Most importantly, the achievement of partial doses of all four pillars of GDMT is better than achievement of target dosing of only a couple.


Asunto(s)
Insuficiencia Cardíaca , Humanos , Fibrilación Atrial , Tolerancia a Medicamentos , Insuficiencia Cardíaca/tratamiento farmacológico , Insuficiencia Renal Crónica , Volumen Sistólico
4.
Phys Sportsmed ; 51(3): 269-274, 2023 06.
Artículo en Inglés | MEDLINE | ID: mdl-35209782

RESUMEN

OBJECTIVE: To describe the training patterns, return to sport (RTS) confidence, and perceived fitness during the COVID-19 pandemic summer 2020 and to compare training patterns and RTS readiness during COVID-19 versus during the 2019 summer in a cohort of Division III collegiate athletes. METHODS: An electronic survey of varsity athletes ≥18 years at three United States Division III colleges querying athlete demographics, Modified Athletic Identity Scale (mAIMS), changes in training regimen summer 2020 vs. 2019, RTS confidence, and perceived physical fitness. RESULTS: One hundred and ninety-two surveys were completed (19% response). Total reported summer 2020 training decreased by 4 hours/week, with increased aerobic (56% vs. 53%, p = 0.03) and decreased sport-specific training (48% vs 70%, p < 0.001). Median RTS confidence score for formal training and competition was 3 ('neither more or less confident') in men's versus 2 ('less confident') in women's athletes. Median fitness self-assessment for men's athletes was 3 ('neither more nor less physically fit') compared to previous season versus median score of 2 ('less physically fit) among women's athletes (p = 0.004). For each mAIMS unit, training increased by 11 minutes/week (95% CI: 2-19 minutes; p = 0.01) and sport-specific training increased by 1.3% (95% CI: 0.5-2.2%; p = 0.003), controlling for age, sport, grade, and school. mAIMS was not associated with confidence or fitness rating. CONCLUSION: Collegiate athletes decreased overall training hours, particularly sport-specific training time during the COVID-19 summer compared to the prior summer. Athletic identity was related to overall and sport-specific training hours but not confidence to RTS or fitness.


Asunto(s)
Traumatismos en Atletas , COVID-19 , Masculino , Humanos , Femenino , Estados Unidos , Volver al Deporte , Traumatismos en Atletas/epidemiología , Pandemias , Atletas , Universidades
5.
Curr Sports Med Rep ; 20(4): 218-228, 2021 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-33790194

RESUMEN

ABSTRACT: Musculoskeletal (MSK) and sports-related conditions are relatively common in the pediatric population. Pediatric residencies should provide residents with the knowledge and skills to assess and manage both acute and chronic MSK and sports injuries and complaints. Residents should develop the competencies and attitudes to safeguard and promote a healthy and active lifestyle for youth. Programs can use a variety of educational tools, both in the clinic and on the field, to provide a well-rounded MSK curriculum throughout the residency years. This article provides a review of general pediatric sports medicine curriculum guidelines and suggested implementation strategies.


Asunto(s)
Traumatismos en Atletas/diagnóstico , Competencia Clínica , Internado y Residencia , Enfermedades Musculoesqueléticas/diagnóstico , Pediatría/educación , Medicina Deportiva/educación , Curriculum , Humanos , Examen Físico
6.
Cardiovasc Diabetol ; 19(1): 212, 2020 12 12.
Artículo en Inglés | MEDLINE | ID: mdl-33308233

RESUMEN

BACKGROUND: Heart failure is a common and devastating complication of type 2 diabetes (T2D). Prompt recognition of heart failure may avert hospitalization, facilitate use of guideline-directed therapies, and impact choice of T2D medications. We sought to determine the rate and factors associated with heart failure documentation in T2D patients with evidence of volume overload requiring loop diuretics. METHODS: DCR is an on-going, prospective US registry of outpatient T2D patients from > 5000 cardiology, endocrinology, and primary care clinicians (current analysis used data from 2013-2019). Among T2D patients receiving loop diuretics, we examined the rate of chart documentation of heart failure. We used a 3-level hierarchical logistic regression model (patients nested within physician within practice) to examine factors associated with heart failure diagnosis. RESULTS: Among 1,322,640 adults with T2D, 225,125 (17.0%) were receiving a loop diuretic, of whom 91,969 (40.9%) had documentation of heart failure. Male sex, lower body mass index, atrial fibrillation, chronic kidney disease, and coronary artery disease were associated with greater odds of heart failure diagnosis. After accounting for patient factors, patients seen by cardiologists were the most likely to have HF documented followed by PCPs and then endocrinologists. CONCLUSIONS: Among US outpatients with T2D, 17% of patients had evidence of volume overload-defined by loop diuretic prescription-of whom fewer than half had a clinical diagnosis of heart failure. While there may be non-heart failure indications for loop diuretics, our data suggest that a substantial proportion of T2D patients may have unrecognized heart failure and therefore could be missing opportunities for targeted therapies that could alter the clinical course of heart failure.


Asunto(s)
Gasto Cardíaco , Diabetes Mellitus Tipo 2/diagnóstico , Documentación , Insuficiencia Cardíaca/diagnóstico , Pacientes Ambulatorios , Anciano , Anciano de 80 o más Años , Gasto Cardíaco/efectos de los fármacos , Diabetes Mellitus Tipo 2/epidemiología , Registros Electrónicos de Salud , Femenino , Insuficiencia Cardíaca/tratamiento farmacológico , Insuficiencia Cardíaca/epidemiología , Insuficiencia Cardíaca/fisiopatología , Humanos , Masculino , Persona de Mediana Edad , Pronóstico , Indicadores de Calidad de la Atención de Salud , Sistema de Registros , Medición de Riesgo , Factores de Riesgo , Inhibidores del Simportador de Cloruro Sódico y Cloruro Potásico/uso terapéutico , Estados Unidos/epidemiología
7.
BMJ Open ; 10(12): e040857, 2020 12 15.
Artículo en Inglés | MEDLINE | ID: mdl-33323440

RESUMEN

OBJECTIVE: To identify factors influencing cardiologists' and hospitalists' decisions regarding palliative care referral among hospitalised patients with advanced heart failure. DESIGN: An exploratory, randomised vignette-based survey. SETTING: Cardiology and hospitalist divisions at three Michigan State institutions and the Society of Hospital Medicine's Michigan Chapter. PARTICIPANTS: 145 hospitalists and 64 cardiologists. OUTCOME MEASURES: Primary outcomes included participants' reports of their likelihood of referring a standardised patient with an acute heart failure exacerbation with multiple prior hospital admissions and acute renal failure to palliative care (scale of 0%-100%) after the initial stem and after being cued with three randomised vignette modifiers, including the presence versus the absence of continuity with an outpatient cardiologist; the presence versus the absence of documented advance care planning; and the patient voicing that he is accepting of his severe illness versus wanting everything done. Adjusted generalised linear models and predictive margins were used to evaluate the impact of each randomised modifier on referral decisions. An interaction term evaluated the effect of provider specialty on outcomes. Secondary outcomes included participants' reports of their general practices around palliative care delivery to hospitalised patients with heart failure. RESULTS: Response rate was 31.3%. Predictive margins from generalised linear models demonstrated a statistically significantly higher likelihood of referral to inpatient palliative care if the patient lacked an outpatient cardiologist (mean difference: 6.3% (95% CI 1.8% to 10.8%)); had prior advance care planning documentation (mean difference: 9.7% (95% CI 4.4% to 15.0%)); and was accepting of illness severity (mean difference: 29.6% (95% CI 24.8% to 34.4%)). No interaction effect was noted based on provider specialty. Most hospitalists and cardiologists were unaware of palliative care guidelines for patients with heart failure (74.3% vs 70.3%, p=0.71). CONCLUSIONS: A number of patient and provider factors influence palliative care referral decisions in hospitalised patients with advanced heart failure.


Asunto(s)
Cardiólogos , Insuficiencia Cardíaca , Médicos Hospitalarios , Insuficiencia Cardíaca/terapia , Humanos , Masculino , Michigan , Cuidados Paliativos , Derivación y Consulta
8.
Am J Ther ; 28(6): e792-e795, 2020 Jan 16.
Artículo en Inglés | MEDLINE | ID: mdl-32427615
9.
N Z Med J ; 131(1473): 59-71, 2018 04 13.
Artículo en Inglés | MEDLINE | ID: mdl-29649198

RESUMEN

AIM: In autumn 2008, an outbreak of toxic honey poisoning was identified. The outbreak was not recognised initially until three cases from one family group presented to hospital, with a common factor of recent consumption of locally produced honey. The aim of this study was to investigate potential cases of this honey poisoning and determine which toxin was involved. METHOD: The incident was investigated retrospectively by Waikato District Health Board's Population Health unit and the New Zealand Food Safety Authority (NZFSA). Identified patients were followed up by questionnaire to gather case information. HortResearch (now Plant and Food Research) tested honey samples for toxins. RESULTS: The causative agent was identified as tutin, which comes from the New Zealand native plant tutu (Coriaria arborea) which has long been known as a potential source of contamination of honey produced in the warmer parts of New Zealand. Retrospective case investigation identified a total of 22 possible or probable cases, based on a clinical case definition. The spectrum of toxic effects reported were broadly similar to those previously described for tutin, derived either directly from the plant itself or indirectly from honey. There were 13 samples of honey, linked to symptomatic individuals, which were available for testing. Of these, 10 were positive for tutin and its hydroxy metabolite hyenanchin (hydroxytutin) and one was positive for hyenanchin alone. CONCLUSION: Toxic honey production is a significant risk in parts of New Zealand. Beekeepers and health professionals need to be informed of this risk and know how best to manage it. Due to this poisoning incident, public and professional awareness of honey poisoning has been substantially enhanced. This incident led to development of new food safety standards for New Zealand honey.


Asunto(s)
Miel , Picrotoxina/análogos & derivados , Intoxicación/epidemiología , Sesquiterpenos/envenenamiento , Adolescente , Adulto , Anciano , Niño , Preescolar , Brotes de Enfermedades/estadística & datos numéricos , Femenino , Humanos , Masculino , Persona de Mediana Edad , Nueva Zelanda/epidemiología , Picrotoxina/envenenamiento , Estudios Retrospectivos , Adulto Joven
10.
Nature ; 555(7697): 483-486, 2018 03 22.
Artículo en Inglés | MEDLINE | ID: mdl-29531319

RESUMEN

Massive galaxies are thought to form in two phases: an initial collapse of gas and giant burst of central star formation, followed by the later accretion of material that builds up their stellar and dark-matter haloes. The systems of globular clusters within such galaxies are believed to form in a similar manner. The initial central burst forms metal-rich (spectrally red) clusters, whereas more metal-poor (spectrally blue) clusters are brought in by the later accretion of less-massive satellites. This formation process is thought to result in the multimodal optical colour distributions that are seen in the globular cluster systems of massive galaxies. Here we report optical observations of the massive relic-galaxy candidate NGC 1277-a nearby, un-evolved example of a high-redshift 'red nugget' galaxy. We find that the optical colour distribution of the cluster system of NGC 1277 is unimodal and entirely red. This finding is in strong contrast to other galaxies of similar and larger stellar mass, the cluster systems of which always exhibit (and are generally dominated by) blue clusters. We argue that the colour distribution of the cluster system of NGC 1277 indicates that the galaxy has undergone little (if any) mass accretion after its initial collapse, and use simulations of possible merger histories to show that the stellar mass due to accretion is probably at most ten per cent of the total stellar mass of the galaxy. These results confirm that NGC 1277 is a genuine relic galaxy and demonstrate that blue clusters constitute an accreted population in present-day massive galaxies.

12.
J Neurotrauma ; 34(4): 838-844, 2017 02 15.
Artículo en Inglés | MEDLINE | ID: mdl-27541061

RESUMEN

Sustaining repeated concussions has been associated with worse outcomes after additional injuries. This effect has been identified using symptom inventories and neurocognitive tests; however, few investigations have examined how a prior concussion history affects gait soon after a subsequent concussion. We examined the gait characteristics of athletes with no documented concussion history (n = 31), athletes recovering from their first lifetime concussion (n = 15), and athletes recovering from their second or greater lifetime concussion (n = 22). All participants completed a single-task and dual-task gait examination, a medical history questionnaire, and a postconcussion symptom scale. Multivariate analyses of covariance (MANCOVA) models were used to evaluate mean gait differences among groups, and Spearman's ρ analyses were used to assess correlations between the number of lifetime concussions and gait characteristics. Patients reporting to the clinic with their second or greater lifetime concussion demonstrated smaller stride lengths than healthy control participants during dual-task walking (p = 0.01; d = 0.70). A moderate but insignificant correlation was detected between dual-task gait speed and the number of prior concussions (ρ = 0.41, p = 0.07). These results indicate that a cumulative effect of concussions across the lifetime may contribute to worsening dual-task dynamic motor function after concussion.


Asunto(s)
Traumatismos en Atletas/fisiopatología , Conmoción Encefálica/fisiopatología , Trastornos Neurológicos de la Marcha/fisiopatología , Desempeño Psicomotor/fisiología , Adolescente , Traumatismos en Atletas/complicaciones , Conmoción Encefálica/complicaciones , Femenino , Trastornos Neurológicos de la Marcha/etiología , Humanos , Masculino
13.
Acta Paediatr ; 105(9): e426-32, 2016 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-27230721

RESUMEN

AIM: To determine which initial postinjury symptom domains are independently associated with symptoms lasting >28 days in youth athletes who sustained sport-related concussions. METHODS: Patients who presented for care at a sport concussion clinic completed the postconcussion symptom scale. They were classified into two groups: those who reported symptom resolution within 28 days of injury and those who did not. Logistic regression models were constructed for children and adolescents to determine the independent association between symptom recovery and potential predictor variables: initial symptom scores in 5 postconcussion symptom scale domains (somatic, vestibular-ocular, cognitive, sleep and emotional), sex, loss of consciousness or amnesia at the time of injury, history of prior concussion, prior treatment for headaches or migraines, or family history of concussion. RESULTS: Sixty-eight child (8-12 years of age) and 250 adolescent (13-18 years of age) athletes were included. For adolescents, initial somatic symptom severity was independently associated with prolonged symptom duration (adjusted odds ratio = 1.162; 95% CI: 1.060, 1.275) and no other predictor variables were. No potential predictor variables were independently associated with prolonged symptom duration for children. CONCLUSION: Among adolescent athletes, a high initial somatic symptom burden (e.g. headache, nausea, vomiting, etc.) is associated with increased odds of symptoms beyond 28 days postinjury.


Asunto(s)
Traumatismos en Atletas , Conmoción Encefálica , Adolescente , Niño , Estudios de Cohortes , Femenino , Humanos , Masculino , Síntomas sin Explicación Médica
14.
Med Probl Perform Art ; 29(2): 70-3, 2014 06.
Artículo en Inglés | MEDLINE | ID: mdl-24925173

RESUMEN

OBJECTIVE: To characterize knee injury patterns in Irish dancers. METHODS: A retrospective chart review was performed for Irish dancers under age 19 who presented with knee injuries to the sports medicine or orthopedic clinic from January 1, 2000 to December 31, 2010. Data were collected on all knee injuries partially or directly related to Irish dance. Injury was defined as dance-related pain or damage to the structures in the knee that resulted in evaluation in the clinic. Survey data were collected to determine the number of different schools/studios represented by the dancers in the study. RESULTS: Sixty-seven Irish dancers with 86 knee injuries were evaluated. Half (50.7%) of these patients received more than one diagnosis during these visits. Overuse injuries accounted for 90.7% of knee injuries. Time to presentation ranged from less than 1 week to over 1 year. There was a significant difference in time to presentation, with traumatic injuries being evaluated sooner than overuse injuries. The most common diagnoses, accounting for 53.5% of injuries, were patellar tracking disorders, including patellofemoral syndrome, hypermobile patella, and patellar subluxation. CONCLUSION: In Irish dance overuse injuries represent the great majority of knee injuries, and patellofemoral tracking disorders are the most common diagnosis. For many dancers, there is often a delay of weeks to months between the onset of symptoms and evaluation in clinic. Prevention programs could potentially eliminate a large portion of knee pain experienced by young Irish dancers.


Asunto(s)
Traumatismos en Atletas/epidemiología , Baile/lesiones , Traumatismos de la Rodilla/epidemiología , Adolescente , Traumatismos en Atletas/prevención & control , Niño , Baile/clasificación , Baile/estadística & datos numéricos , Femenino , Humanos , Masculino , Estudios Retrospectivos , Factores de Riesgo , Estadísticas no Paramétricas , Estados Unidos/epidemiología
15.
Ann Plast Surg ; 69(4): 408-11, 2012 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-22964683

RESUMEN

BACKGROUND: Office-based plastic surgery has continued to rise in the past 2 decades with the increased demand for cosmetic surgery. Although several large studies have shown the safety of office-based surgery, current regulations place some restrictions on ambulatory office-based surgical facilities. To provide further evidence-based literature on the safety of office-based plastic surgery, we examine surgical complication rates as a function of anesthesia duration. METHODS: This is a retrospective review of 2595 patients who underwent office-based plastic surgery procedures between October 2000 and January 2005. All patients received general anesthesia for a broad range of cosmetic surgeries. The primary measured outcome was minor and major surgical complications. Complication rates were examined as a function of anesthesia duration of less than or greater than 4 hours. The follow-up period was 30 days. Statistical analysis was completed using SPSS v.19. RESULTS: Most of the patients were female with an average age of 41 years. An increase in the occurrence of minor surgical complications such as postoperative nausea and vomiting (2.8% vs 5.7%, P=0.0175) and urinary retention (0.7% vs 7.6%, P<0.0001) was noted in the greater than 4-hour anesthesia duration group. Overall, there were 66 (2.5%) patients that required reoperation because of surgical complications with no statistical difference between the 2 groups (P=0.098). The only major morbidities were 1 pulmonary embolism (<4 hours) and 1 deep vein thrombosis (>4 hours). Five (0.19%) patients were admitted to the hospital during the follow-up period for surgical and/or medical management (3 hematomas, 1 deep vein thrombosis, and 1 pulmonary embolism). There were no cases of reintubation, major cardiac complications, or death in this series. CONCLUSIONS: Duration of general anesthesia in office-based plastic surgery does not seem to be an indicator of major morbidity and mortality. Although minor complications such as postoperative nausea and vomiting and urinary retention were higher in patients with anesthesia greater than 4 hours, there was no significant increase in major complications. Change in surgical venue would not likely alter the outcome of the increase in minor complications. Therefore, anesthesia duration should not be used as a guideline for safety of office-based plastic surgery.


Asunto(s)
Procedimientos Quirúrgicos Ambulatorios , Anestesia General/efectos adversos , Técnicas Cosméticas , Complicaciones Posoperatorias/etiología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Procedimientos Quirúrgicos Ambulatorios/normas , Anestesia General/normas , Anestesia General/estadística & datos numéricos , Niño , Técnicas Cosméticas/normas , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Evaluación de Resultado en la Atención de Salud , Seguridad del Paciente , Complicaciones Posoperatorias/epidemiología , Complicaciones Posoperatorias/prevención & control , Guías de Práctica Clínica como Asunto , Estudios Retrospectivos , Factores de Tiempo , Adulto Joven
16.
Oral Maxillofac Surg Clin North Am ; 24(3): 457-68, 2012 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-22857718

RESUMEN

The majority of neck masses in the pediatric population are congenital or inflammatory in origin requiring a thorough understanding of embryology and anatomy of the cervical region. However, malignancy must always be ruled out as they represent 11%-15% of all neck masses in the pediatric population. The initial history and physical are of utmost important to correctly work-up and eventually diagnose the lesion. This article addresses many aspects of the workup, diagnosis and eventual proper surgical or medical management of pediatric neck masses.


Asunto(s)
Neoplasias de Cabeza y Cuello/diagnóstico , Neoplasias de Cabeza y Cuello/cirugía , Adolescente , Región Branquial/anomalías , Región Branquial/cirugía , Niño , Preescolar , Anomalías Craneofaciales/diagnóstico , Anomalías Craneofaciales/cirugía , Quiste Dermoide/diagnóstico , Quiste Dermoide/cirugía , Diagnóstico Diferencial , Diagnóstico por Imagen , Humanos , Lactante , Recién Nacido , Enfermedades Linfáticas/diagnóstico , Enfermedades Linfáticas/cirugía , Enfermedades Faríngeas/diagnóstico , Enfermedades Faríngeas/cirugía , Teratoma/diagnóstico , Teratoma/cirugía , Quiste Tirogloso/diagnóstico , Quiste Tirogloso/cirugía
17.
N Z Med J ; 122(1302): 79-91, 2009 Sep 11.
Artículo en Inglés | MEDLINE | ID: mdl-19834525

RESUMEN

AIM: Sodium fluoroacetate (1080) is used for control of vertebrate pests in New Zealand. Little is known about chronic effects in humans, but animal studies demonstrate potential for adverse fetal, male fertility, and cardiac effects. We aimed to employ analyses of 1080 to help assess the degree of exposure of bait formulators and distributors, and identify specific tasks where exposure reduction appeared most indicated. We also aimed to utilise the (limited) 1080 toxicity data to assess the significance of the analytical results. METHOD: Exposures during various activities were assessed by monitoring air levels and blood and urine concentrations. To help evaluate the results, a provisional "biological exposure index" (BEI) was later derived, by extrapolating from experimental data. RESULTS: Early monitoring indicated exposures were highest in relation to (cereal) bait manufacturing and aerial carrot baiting procedures. A provisional BEI of 15 microg/L for 1080 in urine was proposed. CONCLUSION: Further protective measures and ongoing workplace monitoring are required, particularly in the above situations. Compliance with the current BEI cannot guarantee complete safety. Any information regarding chronic adverse effects in humans, along with the associated urine levels, would assist risk assessment. Further investigation of the human kinetics of fluoroacetate would be helpful.


Asunto(s)
Contaminantes Ocupacionales del Aire/análisis , Fluoroacetatos/efectos adversos , Enfermedades Profesionales/etiología , Adulto , Femenino , Radioisótopos de Flúor , Fluoroacetatos/farmacocinética , Humanos , Masculino , Enfermedades Profesionales/sangre , Enfermedades Profesionales/orina , Medición de Riesgo , Rodenticidas/efectos adversos , Rodenticidas/farmacocinética , Valores Limites del Umbral
18.
Environ Int ; 35(8): 1267-71, 2009 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-19767104

RESUMEN

In recent years there has been an increased concern regarding the potential use of chemical and biological weapons for mass urban terror. In particular, there are concerns that ricin could be employed as such an agent. This has been reinforced by recent high profile cases involving ricin, and its use during the cold war to assassinate a high profile communist dissident. Nevertheless, despite these events, does it deserve such a reputation? Ricin is clearly toxic, though its level of risk depends on the route of entry. By ingestion, the pathology of ricin is largely restricted to the gastrointestinal tract where it may cause mucosal injuries; with appropriate treatment, most patients will make a full recovery. As an agent of terror, it could be used to contaminate an urban water supply, with the intent of causing lethality in a large urban population. However, a substantial mass of pure ricin powder would be required. Such an exercise would be impossible to achieve covertly and would not guarantee success due to variables such as reticulation management, chlorination, mixing, bacterial degradation and ultra-violet light. By injection, ricin is lethal; however, while parenteral delivery is an ideal route for assassination, it is not realistic for an urban population. Dermal absorption of ricin has not been demonstrated. Ricin is also lethal by inhalation. Low doses can lead to progressive and diffuse pulmonary oedema with associated inflammation and necrosis of the alveolar pneumocytes. However, the risk of toxicity is dependent on the aerodynamic equivalent diameter (AED) of the ricin particles. The AED, which is an indicator of the aerodynamic behaviour of a particle, must be of sufficiently low micron size as to target the human alveoli and thereby cause major toxic effects. To target a large population would also necessitate a quantity of powder in excess of several metric tons. The technical and logistical skills required to formulate such a mass of powder to the required size is beyond the ability of terrorists who typically operate out of a kitchen in a small urban dwelling or in a small ill-equipped laboratory. Ricin as a toxin is deadly but as an agent of bioterror it is unsuitable and therefore does not deserve the press attention and subsequent public alarm that has been created.


Asunto(s)
Terrorismo Químico , Sustancias para la Guerra Química/toxicidad , Ricina/toxicidad , Administración Cutánea , Administración por Inhalación , Administración Oral , Sustancias para la Guerra Química/química , Humanos , Infusiones Parenterales , Ricina/administración & dosificación , Ricina/química , Medición de Riesgo
19.
Clin Toxicol (Phila) ; 47(1): 58-60, 2009 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-18951270

RESUMEN

INTRODUCTION: Hydrogen cyanamide is used in New Zealand to induce bud break in kiwifruit vines. The aim of this investigation was to evaluate the calls received by the New Zealand National Poisons Centre (NZNPC) attributed to acute hydrogen cyanamide exposure, and to ascertain the clinical effects of such exposures. METHODS: Call data from the NZNPC telephone collection databases regarding human hydrogen cyanamide exposures were analyzed retrospectively for the years 1990-2006. RESULTS: There were 68 human exposures, 69% were male and 22% female; 88% were adults and there were no suicide attempts. Common exposure routes were inhalation (56%) and skin contact (28%). The workplace accounted for 45% of calls. The predominant toxic effects were nausea and vomiting (29%), headache (22%), contact dermatitis (19%), and erythema (18%). DISCUSSION: Reported symptoms and signs were consistent with the expected effects of hydrogen cyanamide exposure. Other reports of similar exposures describe higher degrees of illnesses among workers using hydrogen cyanamide, which might have been because of lack of training, inadequate access to personal protective equipment, and the absence of engineering controls. CONCLUSIONS: Based on the calls received by the NZNPC, acute exposure to hydrogen cyanamide in the workplace or acute exposure to those living within the vicinity of its use may not pose a significant immediate threat to human health.


Asunto(s)
Cianamida/envenenamiento , Exposición a Riesgos Ambientales/efectos adversos , Encuestas Epidemiológicas , Reguladores del Crecimiento de las Plantas/envenenamiento , Centros de Control de Intoxicaciones , Cianamida/efectos adversos , Cianamida/farmacocinética , Bases de Datos Factuales , Líneas Directas , Humanos , Nueva Zelanda/epidemiología , Reguladores del Crecimiento de las Plantas/farmacocinética , Intoxicación/epidemiología , Intoxicación/etiología , Estudios Retrospectivos
20.
Vulnerable Child Youth Stud ; 4(4): 312-323, 2009 Nov 16.
Artículo en Inglés | MEDLINE | ID: mdl-23730323

RESUMEN

Orphaned children have been found to be at greater risk of poor health and malnutrition compared to non-orphans in sub-Saharan African countries. However, levels of disadvantage vary by location and little is known about the causal pathways that lead from orphanhood to poorer health and malnutrition. Aggregate data from recent Demographic and Health Surveys in 22 countries were used to compare overall levels of ill-health and malnutrition by orphan status. Data from the Manicaland Child Cohort Study in Zimbabwe - a closed cohort study with detailed longitudinal information on orphan's experience - were used to describe how patterns of ill-health and malnutrition alter over the child's life-course and to test causal pathways between orphanhood and ill-health and malnutrition, hypothesized in a previously published theoretical frame-work. Modest increases in ill-health and malnutrition were found in orphans in the Demographic and Health Surveys data, with maternal and double orphans being worst affected. Non-significant associations were found between orphanhood and ill-health in the Manicaland Child Cohort Study data, but no associations with malnutrition were found. None the less, smaller increases in body mass index with age were seen among orphans (ologit test for difference: adjusted odds ratio = 0.68; p = 0.07) and maternal orphans (ologit test for difference: adjusted odds ratio = 0.67; p = 0.03) than among non-orphans. Stigma and discrimination contributed to poor diet, malnutrition and ill-health in children whose mothers had died, while heightened poverty was a more important factor for paternal orphans. These results suggest social and psychological support for orphans and their families could be as important as material support in preventing malnutrition and ill-health.

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