Deficiência de vitamina B12 e fatores associados em idosos institucionalizados / Vitamin B12 deficiency and associated factors in institutionalized

Resumo Objetivo Avaliar a frequência de deficiência de vitamina B12 e fatores associados em idosos institucionalizados. Método Analisamos 65 idosos, com idade média de 80±9 anos (61-113), de uma instituição geriátrica filantrópica de longa permanência. A dosagem sérica de vitamina B12 foi analisada e classificada em: normal (≥299 pg/mL), limítrofe (200-298 pg/mL) e deficiência (<200 pg/mL). Foi analisada a associação com tempo de permanência na instituição, declínio cognitivo e funcional, uso regular de biguanidas e inibidores de bomba de prótons, considerados fatores de risco para hipovitaminose B12, utilizando os testes de análise bivariada (paramétrica e não paramétrica) e regressão de Poisson. Resultados A deficiência de vitamina B12 estava presente em 21,5% e valores limítrofes em 32,3% da amostra. Dentre os idosos, 52,9% apresentavam demência de causas diversas, 49,2% hipertensão arterial, 29,2% com anemia (21,5% normocítica, 4,6% microcítica e 3,1% macrocítica), 18,5% diabéticos; 27,7% faziam uso de polifarmácia, com 12,3% em uso de metformina e 16,9% com inibidores de bomba de prótons. No modelo multivariado não houve associação entre a deficiência de vitamina B12 com as variáveis estudadas. Conclusão Observamos uma frequência importante de valores limítrofes e baixos de vitamina B12 nos pacientes dessa instuição geriátrica de cuidados permanentes, porém sem associação com os fatores de risco para sua deficiência estudado, o que torna importante a inclusão da dosagem sérica dessa vitamina na rotina de exames laboratoriais desse grupo.

Abstract Objective To assess the frequency of vitamin B12 deficiency and associated factors in institutionalized old people. Method We analyzed 65 old people, with an average age of 80±9 years (61-113), from a long-term philanthropic geriatric institution. The serum dosage of vitamin B12 was analyzed and classified as: normal (≥299 pg/mL), borderline (200-298 pg/mL) and deficiency (<200 pg/mL). The association with length of stay in the institution, cognitive and functional decline, regular use of biguanides and proton pump inhibitors, considered risk factors for B12 hypovitaminosis, was analyzed using the bivariate analysis tests (parametric and non-parametric) and Poisson regression. Results Vitamin B12 deficiency was present in 21.5% and borderline values in 32.3% of the sample. Among the old people, 52.9% had dementia of different causes, 49.2% had arterial hypertension, 29.2% with anemia (21.5% normocytic, 4.6% microcytic and 3.1% macrocytic), 18.5 % diabetics; 27.7% used polypharmacy, with 12.3% using metformin and 16.9% using proton pump inhibitors. In the multivariate model, there was no association between vitamin B12 deficiency and the variables studied. Conclusion We observed an important frequency of borderline and low values of vitamin B12 in the patients of this geriatric institution of permanent care, but without association with the risk factors for their deficiency studied, which makes it important to include the serum dosage of this vitamin in the laboratory tests routine of that group.

Sundown syndrome in patients with Alzheimer's disease dementia.

The sundown syndrome is a complex neurobehavioral disorder in patients with dementia associated with high financial cost and significant caregiver burden. It is a multifactorial phenomenon with unclear pathophysiology, characterized by the presence of neuropsychiatric symptoms in the evening period. OBJECTIVE: To analyze the main neuropsychiatric symptoms, their correlation with one another, with comorbidities, and with time of day of greatest symptom intensity in patients with Alzheimer's disease dementia. METHODS: This is a cross-sectional, observational and explanatory study in which caregivers/relatives of elderly patients with dementia were interviewed using a structured tool called the Neuropsychiatric Inventory (NPI). RESULTS: The sample studied was composed of 38 patients, 60.5% female and 39.5% male, with mean age of 81±6 (67-94) years. A high frequency of neuropsychiatric symptoms in the evening period was observed, predominantly irritability (55.3%), nocturnal behavior (47.4%), and aggressiveness (42.1%). Only 36.8% of the family caregivers used non-pharmacological strategies. CONCLUSION: The frequency of neuropsychiatric symptoms was exacerbated in the evening among patients with Alzheimer's disease, especially for those behavioral symptoms that had a positive correlation with one another.

A síndrome do entardecer ou "pôr do sol" - "sundown syndrome" - é uma alteração neurocomportamental complexa em pacientes portadores de demência que geram custos financeiros excessivos e desgaste importante a seus cuidadores. Trata-se de um fenômeno multifatorial com fisiopatologia incerta, que caracteriza-se pela presença de sintomas neuropsiquiátricos no período vespertino. OBJETIVO: Analisar os principais sintomas neuropsiquiátricos, sua correlação entre si, com comorbidades e o horário do dia de maior intensidade destes em pacientes portadores de demência da doença de Alzheimer. MÉTODOS: Trata-se de um estudo analítico transversal, observacional e explanatório no qual foram entrevistados cuidadores/familiares de pacientes idosos portadores de demência utilizando uma ferramenta estruturada denominada Neuropsychiatric Inventory (NPI). RESULTADOS: A amostra estudada foi de 38 pacientes, 60,5% feminino e 39,5% masculino, com 81±6 (67-94) anos de idade. Foi observada uma alta frequência de sintomas neuropsiquiátricos no período vespertino, principalmente irritabilidade (55,3%), comportamento noturno (47,4%), agressividade (42,1%). Apenas 36,8% dos cuidadores familiares empregavam estratégias não farmacológicas. CONCLUSÃO: A frequência dos sintomas neuropsiquiátricos são exacerbados ao entardecer em pacientes com doença de Alzheimer; principalmente os sintomas comportamentais com correlação positiva entre si.

Sundown syndrome in patients with Alzheimer's disease dementia / Síndrome do entardecer em pacientes portadores de demência da doença de alzheimer

ABSTRACT The sundown syndrome is a complex neurobehavioral disorder in patients with dementia associated with high financial cost and significant caregiver burden. It is a multifactorial phenomenon with unclear pathophysiology, characterized by the presence of neuropsychiatric symptoms in the evening period. Objective: To analyze the main neuropsychiatric symptoms, their correlation with one another, with comorbidities, and with time of day of greatest symptom intensity in patients with Alzheimer's disease dementia. Methods: This is a cross-sectional, observational and explanatory study in which caregivers/relatives of elderly patients with dementia were interviewed using a structured tool called the Neuropsychiatric Inventory (NPI). Results: The sample studied was composed of 38 patients, 60.5% female and 39.5% male, with mean age of 81±6 (67-94) years. A high frequency of neuropsychiatric symptoms in the evening period was observed, predominantly irritability (55.3%), nocturnal behavior (47.4%), and aggressiveness (42.1%). Only 36.8% of the family caregivers used non-pharmacological strategies. Conclusion: The frequency of neuropsychiatric symptoms was exacerbated in the evening among patients with Alzheimer's disease, especially for those behavioral symptoms that had a positive correlation with one another.

RESUMO A síndrome do entardecer ou "pôr do sol" - "sundown syndrome" - é uma alteração neurocomportamental complexa em pacientes portadores de demência que geram custos financeiros excessivos e desgaste importante a seus cuidadores. Trata-se de um fenômeno multifatorial com fisiopatologia incerta, que caracteriza-se pela presença de sintomas neuropsiquiátricos no período vespertino. Objetivo: Analisar os principais sintomas neuropsiquiátricos, sua correlação entre si, com comorbidades e o horário do dia de maior intensidade destes em pacientes portadores de demência da doença de Alzheimer. Métodos: Trata-se de um estudo analítico transversal, observacional e explanatório no qual foram entrevistados cuidadores/familiares de pacientes idosos portadores de demência utilizando uma ferramenta estruturada denominada Neuropsychiatric Inventory (NPI). Resultados: A amostra estudada foi de 38 pacientes, 60,5% feminino e 39,5% masculino, com 81±6 (67-94) anos de idade. Foi observada uma alta frequência de sintomas neuropsiquiátricos no período vespertino, principalmente irritabilidade (55,3%), comportamento noturno (47,4%), agressividade (42,1%). Apenas 36,8% dos cuidadores familiares empregavam estratégias não farmacológicas. Conclusão: A frequência dos sintomas neuropsiquiátricos são exacerbados ao entardecer em pacientes com doença de Alzheimer; principalmente os sintomas comportamentais com correlação positiva entre si.

Could formaldehyde induce mutagenic and cytotoxic effects in buccal epithelial cells during anatomy classes?

BACKGROUND: Due to increased formaldehyde exposure, carcinogenic to humans, several researches have been studying the potential toxicity and the safe levels for human beings. The aim of this study was to investigate mutagenicity and cytotoxicity in buccal epithelial exfoliated cells (BEC) of students subjected to formaldehyde (FA) during anatomy classes. MATERIAL AND METHODS: BEC were collected periodically from 17 volunteers of undergraduate programs, who had participated in practical anatomy classes, before and after FA exposure. Cells were stained according to Feulgen method and then micronucleus test was applied. A total of 1,500 cells were assessed per individual in this study for the micronucleus frequency and other parameters of cytotoxicity. RESULTS: There was statistically significant increase in number of micronucleated BEC after FA exposure (after 1 month p=.034 and after 3.5 months p=.017). However, FA exposure caused no significant increase in other nuclear alterations closely related to cytotoxicity (p≥.05). CONCLUSIONS: FA induced mutagenicity during anatomy classes. Cell death increased, but it was not statistically significant. Efforts have to be made to improve air quality and reduce exposures during anatomy classes

Nuclear alterations in nasal mucosa epithelial cells of students exposed to formaldehyde / Alteraciones en los núcleos de las células epiteliales de la mucosa nasal de los estudiantes expuestos a formaldehído

INTRODUCTION: Formaldehyde is a compound with a wide range and is commonly used in anatomy and pathology laboratories. At room temperature is quickly volatilized to a pungent and suffocating gas and its inhalation has been correlated to nuclear alterations in different tissues. We aimed to investigate whether exposure to this compound was correlated with the appearance of cytotoxic and genotoxic features in the nasal epithelial cells of students enrolled in a human anatomy course. MATERIAL AND METHODS: This prospective study collected periodically nasal cells from mucosa of 17 volunteers from two different undergraduate programs with different workloads of practical lessons in an anatomy laboratory, 30 and 90 hours per semester. Cells were staining according to Feulgen method and nuclear morphology was analyzed to detect possible damage. Dunn's post hoc test was used in the statistical analysis. Pearson's correlation was performed for gender, age and questionnaire responses. RESULTS: Epithelial cells showed indicators of cytotoxicity and mutagenicity. Students with a more extensive workload in anatomy laboratory displayed a more severe profile with an increase in karyorrhexis (p 0.05). CONCLUSION: Individuals exposed for short periods of time to formaldehyde are subject to the toxic action of this gas. Karyorrhexis was the most frequently observed cytotoxic feature and micronucleus showed an increase between the first time point. The patterns observed between the student's groups suggest a negative effect due to exposure time

INTRODUCCIÓN: El formaldehído es un compuesto con una amplia variedad y se utiliza comúnmente en los laboratorios de anatomía y patología. En la temperatura ambiente se volatiliza rápidamente en un gas acre sofocante. Su inhalación se ha correlacionado con la aparición de alteraciones nucleares en diferentes tejidos. El objetivo fue investigar si la exposición a este compuesto podría estar relacionado con la aparición de aspectos citotóxicos y genotóxicos en las células epiteliales nasales de los estudiantes del curso de anatomía humana. MATERIAL Y MÉTODOS: En este estudio las células nasales proclives se recogieron periódicamente de la mucosa de los 17 voluntarios de las carreras universitarias con diferentes cargas de clases prácticas en el laboratorio de anatomía, 30 y 90 horas semestrales. Las células fueron teñidas por el método de Feulgen y la morfología nuclear fue evaluada para la detección de posibles daños. Prueba post hoc de Dunn fue utilizada para el análisis estadístico. Correlación de Pearson fue realizada con los datos de sexo, edad y las respuestas del cuestionario. RESULTADOS: Las células epiteliales mostraron indicadores de citotoxicidad, mutagenicidad. Los estudiantes con una carga de trabajo más extensa en el laboratorio de anatomía mostraron perfil más grave con el aumento de cariorrexis (p 0,05). CONCLUSIÓN: Individuos expuestos durante cortos períodos de tiempo a formaldehído están sujetos a la acción tóxica de gas. Cariorrexis fue la característica citotóxica observada con mayor frecuencia y micronúcleos mostraron un aumento entre el primer punto de tiempo. Los diferentes patrones de daños observados entre los grupos de estudiantes sugieren que el efecto negativo de gas puede está relacionado con el tiempo de exposición