Effects of moxa smoke through olfactory pathway on learning and memory ability in rapid aging mice / 中国针灸

OBJECTIVE@#To observe the effects of moxa smoke through olfactory pathway on learning and memory ability in rapid aging (SAMP8) mice, and to explore the action pathway of moxa smoke.@*METHODS@#Forty-eight six-month-old male SAMP8 mice were randomly divided into a model group, an olfactory dysfunction group, a moxa smoke group and an olfactory dysfunction + moxa smoke group, with 12 mice in each group. Twelve age-matched male SAMR1 mice were used as the blank group. The olfactory dysfunction model was induced in the olfactory dysfunction group and the olfactory dysfunction + moxa smoke group by intraperitoneal injection of 3-methylindole (3-MI) with 300 mg/kg, and the moxa smoke group and the olfactory dysfunction + moxa smoke group were intervened with moxa smoke at a concentration of 10-15 mg/m3 for 30 min per day, with a total of 6 interventions per week. After 6 weeks, the emotion and cognitive function of mice was tested by open field test and Morris water maze test, and the neuronal morphology in the CAI area of the hippocampus was observed by HE staining. The contents of neurotransmitters (glutamic acid [Glu], gamma-aminobutyric acid [GABA], dopamine [DA], and 5-hydroxytryptamine [5-HT]) in hippocampal tissue of mice were detected by ELISA.@*RESULTS@#The mice in the blank group, the model group and the moxa smoke group could find the buried food pellets within 300 s, while the mice in the olfactory dysfunction group and the olfactory dysfunction + moxa smoke group took more than 300 s to find them. Compared with the blank group, the model group had increased vertical and horizontal movements (P<0.05) and reduced central area residence time (P<0.05) in the open field test, prolonged mean escape latency on days 1-4 (P<0.05), and decreased search time, swimming distance and swimming distance ratio in the target quadrant of the Morris water maze test, and decreased GABA, DA and 5-HT contents (P<0.05, P<0.01) and increased Glu content (P<0.05) in hippocampal tissue. Compared with the model group, the olfactory dysfunction group had increased vertical movements (P<0.05), reduced central area residence time (P<0.05), and increased DA content in hippocampal tissue (P<0.05); the olfactory dysfunction + moxa smoke group had shortened mean escape latency on days 3 and 4 of the Morris water maze test (P<0.05) and increased DA content in hippocampal tissue (P<0.05); the moxa smoke group had prolonged search time in the target quadrant (P<0.05) and increased swimming distance ratio, and increased DA and 5-HT contents in hippocampal tissue (P<0.05, P<0.01) and decreased Glu content in hippocampal tissue (P<0.05). Compared with the olfactory dysfunction group, the olfactory dysfunction + moxa smoke group showed a shortened mean escape latency on day 4 of the Morris water maze test (P<0.05). Compared with the moxa smoke group, the olfactory dysfunction + moxa smoke group had a decreased 5-HT content in the hippocampus (P<0.05). Compared with the blank group, the model group showed a reduced number of neurons in the CA1 area of the hippocampus with a disordered arrangement; the olfactory dysfunction group had similar neuronal morphology in the CA1 area of the hippocampus to the model group. Compared with the model group, the moxa smoke group had an increased number of neurons in the CA1 area of the hippocampus that were more densely packed. Compared with the moxa smoke group, the olfactory dysfunction + moxa smoke group had a reduced number of neurons in the CA1 area of the hippocampus, with the extent between that of the moxa smoke group and the olfactory dysfunction group.@*CONCLUSION@#The moxa smoke could regulate the contents of neurotransmitters Glu, DA and 5-HT in hippocampal tissue through olfactory pathway to improve the learning and memory ability of SAMP8 mice, and the olfactory is not the only effective pathway.

Máscara n95: percepções dos trabalhadores do centro cirúrgico / Máscara n95: percepciones de los trabajadores del centro quirúrgico / N95 mask: perceptions of surgical center workers

Objetivo: identificar as percepções dos trabalhadores do centro cirúrgico quanto ao uso da máscara N95 como Equipamento de Proteção Individual em relação à fumaça cirúrgica. Método: pesquisa qualitativa mediante entrevistas áudio-gravadas, com nove trabalhadores do Centro Cirúrgico de um hospital no norte do Paraná, Brasil. Questionou-se: qual a percepção dos trabalhadores expostos à fumaça cirúrgica em relação ao uso das máscaras N95? Foi utilizada a técnica de análise de conteúdo. Resultados: o estudo revela a fragilidade do conhecimento dos profissionais sobre a utilização da máscara N95 e sobre os riscos que estão expostos durante sua jornada de trabalho, quando expostos à fumaça cirúrgica. Assim como o desconforto pelo uso da máscara. Conclusão: sugere-se capacitação aos profissionais da saúde expostos à fumaça cirúrgica, onde possa ser esclarecido sobre o uso de Equipamento de Proteção Individual de forma correta e sua importância na prevenção para o desenvolvimento de doenças ocupacionais.

Objetivo: identificar las percepciones de los trabajadores del centro quirúrgico en cuanto al uso de la máscara N95 como Equipo de Protección Individual en relación al humo quirúrgico. Método: investigación cualitativa mediante entrevistas audio-grabadas, con nueve trabajadores del Centro Quirúrgico de un hospital en el norte de Paraná, Brasil. Se preguntó: ¿cuál es la percepción de los trabajadores expuestos al humo quirúrgico con respecto al uso de las máscaras N95? Se utilizó la técnica de análisis de contenido. Resultados: el estudio revela la fragilidad del conocimiento de los profesionales sobre la utilización de la máscara N95 y sobre los riesgos que están expuestos durante su jornada de trabajo, cuando están expuestos al humo quirúrgico. Así como la incomodidad por el uso de la máscara. Conclusión: se sugiere capacitación a los profesionales de la salud expuestos a humo quirúrgico, donde pueda ser esclarecido sobre el uso de Equipo de Protección Individual de forma correcta y su importancia en la prevención para el desarrollo de enfermedades ocupacionales.

Objective: to identify the perceptions of surgical center workers regarding the use of the N95 mask as Personal Protection Equipment in relation to surgical smoke. Method: qualitative research through audio-recorded interviews with nine workers from the Surgical Center of a hospital in northern Paraná, Brazil. It was questioned: what is the perception of workers exposed to surgical smoke in relation to the use of N95 masks? The technique of content analysis was used. Results: the study reveals the fragility of professionals' knowledge about the use of the N95 mask and the risks they are exposed during their working day, when exposed to surgical smoke. As well as discomfort from wearing the mask. Conclusion: training for health professionals exposed to surgical smoke is suggested, where it can be clarified about the use of Personal Protective Equipment correctly and its importance in preventing the development of occupational diseases.

Smoke of Capsicum baccatum L. var. baccatum (Solanaceae) repels nymphs of triatoma infestans (Klug) (Hemiptera: Reduviidae) / Humo de capsicum baccatum L. var. baccatum (Solanaceae) repele las ninfas de Triatoma infestans (Klug) (Hemiptera: Reduviidae)

Control of the Chagas disease vector, Triatoma infestans (Klug) (Hemiptera: Reduviidae) with synthetic pesticides in Bolivia has become increasingly inefficient due to the development of resistance in the insects. In the Chaco region of Bolivia, guaraní populations have approached the problem by fumigating their houses with the smoke of native plants. Through interviews and field work with local guides, the main plant used by the guaraníes was collected and later identified as Capsicum baccatumL. var. baccatum (Solanaceae). In choice bioassays, filter papers exposed to the smoke of the plant repelled nymphs of T. infestans. Activity remained significant after storing the exposed filter papers for 9 days. Chemical analysis of smoke and literature data suggested that capsaicinoids present in the smoke were responsible for the repellent effect. The data presented provide a rationale for the use of C. baccatumvar. baccatumto control the Chagas vector bythe guaraní populations.

El control del vector de la enfermedad de Chagas, Triatoma infestans (Klug) (Hemiptera: Reduviidae) con plaguicidas sintéticos en Bolivia se ha vuelto cada vez más ineficiente debido al desarrollo de resistencias en los insectos. En la región del Chaco de Bolivia, las poblaciones guaraníes han abordado el problema fumigando sus casas con el humo de las plantas nativas. A través de entrevistas y trabajo de campo con guías locales, se recogió la principal planta utilizada por los guaraníes y posteriormente se identificó como Capsicum baccatumL. var. baccatum (Solanaceae). En bioensayos selectos, los papeles de filtro expuestos al humo de la planta repelieron a las ninfas de T. infestans. La actividad siguió siendo significativa después de almacenar los papeles de filtro expuestos durante 9 días. El análisis químico del humo y los datos de la literatura sugieren que los capsaicinoides presentes en el humo eran responsables del efecto repelente. Los datos presentados proporcionan una justificación para el uso de C. baccatum var. baccatum para el control del vector Chagas por las poblaciones guaraníes.

Risco ocupacional: sinais e sintomas relacionados à exposição à fumaça cirúrgica / Occupational risk: signs and symptoms related to exposure to surgical smoke* / Riesgo laboral: signos y síntomas relacionados con la exposición al humo quirúrgico

Objetivo: Identificar a prevalência e a intensidade dos sinais e sintomas relacionados à exposição ocupacional à fumaça cirúrgica em trabalhadores da saúde e suas medidas de proteção. Método: Estudo transversal de caráter descritivo, desenvolvido com trabalhadores da área da saúde expostos à fumaça cirúrgica. A coleta foi realizada em setembro de 2021, em uma instituição de serviço terciário com característica oncológica e filantrópica e em um hospital universitário de alta complexidade. Resultados: A amostra foi de 155 participantes, a prevalência de sinais e sintomas: sistema respiratório de 55,45%, sistema ocular 43,22% e sistema nervoso 37,41%, com significância estatística para a intensidade de sinais e sintomas nos sistemas tegumentar (p=0,05) e nervoso (p=0,01). Conclusão: A maior taxa de prevalência dos sinais e sintomas foi nos sistemas respiratório, ocular, nervoso e tegumentar com significância estatística.

Objective: To identify the prevalence and intensity of signs and symptoms related to occupational exposure to surgical smoke in health workers and their protective measures. Method: Descriptive cross-sectional study, developed with healthcare workers exposed to surgical smoke. Collection was carried out in September 2021, in a tertiary service institution with oncological and philanthropic characteristics and in a highly complex university hospital. Results: The sample consisted of 155 participants; the prevalence of signs and symptoms was: respiratory system 55.45%, ocular system 43.22%, and nervous system 37.41%, with statistical significance for the intensity of signs and symptoms in the integumentary (p=0,05) and nervous (p=0,01) systems. Conclusions: The highest rate of prevalence of signs and symptoms was in the respiratory, ocular, nervous, and integumentary systems with statistical significance.

Objetivo: Identificar la prevalencia e intensidad de lós signos y síntomas relacionados con la exposición ocupacional al humo quirúrgico em trabajadores de la salud y sus medidas de protección. Método: Estudio transversal descriptivo, desarrollado con trabajadores de la salud expuestos al humo quirúrgico. La colecta se realizó en septiembre de 2021, en una institución de tercer nivel com características oncológicas, filantrópicas y en un hospital universitario de alta complejidad. Resultados: La muestra estuvo conformada por 155 participantes, La prevalencia de signos y síntomas: Sistema respiratorio 55,45%, sistema ocular 43,22% y sistema nervioso 37,41%, con significación estadística para la intensidad de signos y síntomas en los sistemas tegumentarios (p=0,05) y nervioso (p=0,01). Conclusión: La mayor tasa de prevalencia de signos y síntomas fue en los sistemas respiratorio, ocular, nervioso y tegumentario con significancia estadística.

Consideration on development of the national standard: Pure Moxa Stick / 中国针灸

The paper gives a consideration on the development of the national standard, Pure Moxa Stick. It is proposed that the principle and requirements for the development of product standard should be adhered to, while focusing on the applicability and safety of pure moxa stick. In terms of quality, the specific requirements should be developed on the ratio of moxa floss, wrapping paper and adhesives. Regarding the specifications, either the market demands or the resource waste prevention should be considered. In safety, the combustion temperature and moxa smoke control are the key issues.

Color and surface gloss stability of bis-acryl and resin composite after exposure to cigarette smoke / Estabilidade de cor e brilho superficial de resinas compostas e bisacrílicas após exposição por fumaça de cigarro

Objective: To evaluate color and surface gloss stability of bis-acryl resins and resin composites, submitted to artificial staining with cigarette smoke. Material and Methods: Specimens of each material were prepared (n=15). Two resin composites (GrandioSO [RCG], Filtek Supreme [RCZ]) and five bis-acryl resins (Luxatemp Star [BisLUX], Protemp4 [BisPRO], Structor3 [BisSTR], Visalys Temp [BisVIS] and Yprov [BisYPR]) were tested. Initial color was assessed using a spectrophotometer and surface gloss with a glossmeter. Samples were submitted to smoke exposure (10 cigarettes under 8 minutes per cycle). After 3 and 6 cycles, color and gloss were reassessed. Final readings were performed after brush prophylaxis. Data were analyzed using two-way repeated ANOVA and Tukey's test (p<0.05). Results: Differences and interaction of factors (p<0.01) were detected for both color and gloss readings. Resin composites were the least affected by aging, with gloss reduction after prophylaxis. Differences were detected among bis-acryl resins, with better results for BisLUX and BisPRO. BisPRO and BisSTR, showed reduction in gloss after 60 cigarettes, while BisYPR gloss decreased at all evaluated periods. Conclusion: Resin composites are less susceptible to changes after smoke exposure, while bis-acryl resins results are brand-dependent. Prophylaxis negatively influenced the surface gloss of most of the tested materials (AU)

Objetivo: Avaliar a estabilidade de cor e brilho superficial de resinas compostas e bisacrílicas, submetidos ao manchamento artificial por fumaça de cigarro. Material e Métodos: Foram preparados espécimes de cada material (n=15). Duas resinas compostas (GrandioSO [RCG], Filtek Supreme [RCZ]) e cinco resinas bisacrílicas (Luxatemp Star [BisLUX], Protemp4 [BisPRO], Structor3 [BisSTR], Visalys Temp [BisVIS] e Yprov [BisYPR]) foram testados. A cor inicial foi avaliada usando um espectrofotômetro e o brilho de superfície com um medidor de brilho. As amostras foram submetidas à exposição de fumaça de cigarro (10 cigarros com até 8 minutos por ciclo). Após 3 e 6 ciclos, a cor e o brilho foram reavaliados. As leituras finais foram realizadas após a profilaxia escova de robinson. Os dados foram analisados usando de medidas repetidas e teste de Tukey (p<0,05). Resultados: Foram detectadas diferenças e interação de fatores (p<0,01) tanto para leituras de cor quanto para leituras de brilho. As resinas compostas foram as menos afetados pelo envelhecimento, com redução do brilho após a profilaxia. Foram detectadas diferenças entre as resinas bisacrílicas, com melhores resultados para BisLUX e BisPRO. BisPRO e BisSTR, mostraram redução de brilho após 60 cigarros, enquanto que o brilho da BisYPR diminuiu em todos os períodos avaliados. Conclusão: As resinas compostas são as menos suscetíveis a mudanças após a exposição à fumaça, enquanto os resultados das resinas bisacrílicas são dependentes da marca. A profilaxia influenciou negativamente o brilho de superfície da maioria dos materiais testados.(AU)

Intoxicación aguda con monóxido de carbono (ICO) secundaria a pipa de agua (Narguile). Reporte de un caso / Carbon monoxide poisoning caused by water pipe smoking (Narghile). A case report

Resumen Dentro de las formas alternativas de consumo de tabaco, se describe el uso de pipas de agua (también llamadas hookah, shisha o narguile) como implementos de uso. Esta forma de uso es una forma emergente en nuestro medio, con uso en estudiantes universitarios y secundarios. Debido a que utiliza carbón para quemar el tabaco, junto a largos períodos de uso, presenta riesgo de intoxicación por monóxido de carbono, especialmente si se utiliza en ambientes cerrados. En este artículo presentamos el caso de una paciente femenina de 19 años, quién fue traída al hospital con una intoxicación grave por monóxi do de carbono secundaria a uso de pipa de agua, requiriendo tratamiento con oxígeno en cámara hiperbárica. Realizamos una revisión de la bibliografía.

Abstract Amongst the alternative ways of tobacco use, water pipes (also called hookah, shisha or narghile) have been used as implements. This type of use is an emergent one in our environment, being used by high school and college students. Due to the use of charcoal as a way to burn the tobacco, and the long using times it presents, the users are at risk of being poisoned by carbon monoxide, especially if they smoke in enclosed spaces. In this paper, we present the case of a 19-year-old female patient, who was brought to the hospital with a severe case of carbon monoxide poisoning, requiring treatment with oxygen in a hyperbaric chamber. We make a review of the literature.

Sinais e sintomas relacionados à exposição à fumaça cirúrgica: revisão integrativa / Signs and symptoms related to surgical smoke exposure: integrative review / Signos y síntomas relacionados con la exposición al humo quirúrgico: revisión integrativa

Objetivo: Analisar as evidências científicas disponíveis na literatura sobre os sinais e sintomas relacionados à exposição à fumaça cirúrgica em trabalhadores do bloco operatório. Método: Revisão integrativa da literatura, com busca nas seguintes bases de dados: Medline, Cumulative Index to Nursing and Allied Health Literature, Literatura Latino-Americana e do Caribe em Ciências da Saúde, Web Of Science e SCOPUS. Resultados: Foram 1.351 estudos pré-selecionados, sendo 4 por busca manual. Ao fim, obtiveram-se cinco artigos para análise. Os sinais e sintomas encontrados foram: tosse, ardência de faringe, espirros, rinite, lesão nasofaringe, sensação de corpo estranho na garganta, congestão nasal, inflamação das vias aéreas, lacrimejamento dos olhos, náuseas, vômitos, dor abdominal, fraqueza, cãibra, cefaleia, sonolência, tonturas, irritabilidade, desconforto (como mau cheiro na roupa). Conclusão: Observaram-se grandes avanços nas pesquisas propostas, estudos que embasam a intensidade dos sinais e sintomas e orientação dos riscos nocivos que proporcionem aos gestores conhecimento e fundamentação científica para futuras intervenções tanto contra a proteção ao trabalhador como para prevenção de risco no ambiente de trabalho.

Objective: To analyze the scientific evidence available in the literature on signs and symptoms related to surgical smoke exposure among surgical block workers. Method: This integrative literature review searched the following databases: MEDLINE, Cumulative Index to Nursing and Allied Health Literature, Latin American and Caribbean Health Sciences Literature, Web of Science, and Scopus. Results: A total of 1,351 studies were pre-selected, 4 of which were found by manual search. In the end, five articles were analyzed. The signs and symptoms identified were: cough, burning sensation in the pharynx, sneezing, rhinitis, nasopharyngeal lesion, foreign body sensation in the throat, nasal congestion, airway inflammation, lacrimation, nausea, vomiting, abdominal pain, weakness, muscle cramp, headache, drowsiness, lightheadedness, irritability, discomfort (such as unpleasant smell in clothes). Conclusion: Great advances have been detected in the studies proposed. These investigations lay the foundation for the intensity of signs and symptoms and the orientation regarding harmful risks, providing managers with the knowledge and scientific basis for future interventions, both to protect the team and to prevent risks in the work environment.

Objetivo: Analizar la evidencia científica disponible en la literatura sobre signos y síntomas relacionados con la exposición al humo quirúrgico en trabajadores de quirófano. Método: Revisión integrativa de la literatura, buscando en las siguientes bases de datos: Medline, Cumulative Index to Nursing and Allied Health Literature, Latin American and Caribbean Literature in Health Sciences, Web Of Science y SCOPUS. Resultados: Hubo 1.351 estudios preseleccionados, cuatro por búsqueda manual. Al final, se obtuvieron cinco artículos para su análisis. Los signos y síntomas encontrados fueron: tos, ardor faríngeo, estornudos, rinitis, lesión nasofaríngea, sensación de cuerpo extraño en la garganta, congestión nasal, inflamación de las vías respiratorias, lagrimeo de los ojos, náuseas, vómitos, dolor abdominal, debilidad, calambres, dolor de cabeza, somnolencia, mareos, irritabilidad, malestar como mal olor en la ropa. Conclusión: Hubo grandes avances en la investigación propuesta, estudios que apoyan la intensidad de los signos y síntomas y orientaciones sobre riesgos nocivos que brinden a los gestores conocimiento y fundamento científico para futuras intervenciones, tanto contra la protección del trabajador como para la prevención de riesgos en el entorno laboral.

Intrauterine and postnatal exposure to tobacco and wood smoke on hypothalamic development and cognition: an integrative review of the literature / Exposición intrauterina y postnatal al humo de tabaco y de leña en el desarrollo hipotalámico y la cognición: una revisión integrativa de la literatura

SUMMARY: Exposure to air pollution and its pollutants has been associated with important effects on human health since the first years of life, thus it has been seen that exposure to tobacco smoke and wood smoke is directly related to cardiovascular and pulmonary diseases, respiratory and cancers. However, exposure to air pollution during fetal development and its effects on brain structure and function during early childhood and adolescence have been little studied. In this review we have analyzed the literature on prenatal exposure to tobacco and wood smoke and its relationship with hypothalamic development and cognition in the first years of life.The molecular, morphological and physiological aspects of the relationship between pre- and postnatal exposure to tobacco and wood smoke with neural developmental, cognitive and behavioral problems during early childhood and adolescence have not yet been fully clarified. The information available in the scientific literature based on antecedents obtained from epidemiological studies has been negatively affected by confounding variables and great methodological challenges that make it impossible to affirm an exact causal relationship with certainty.

RESUMEN: La exposición a la contaminación del aire se ha asociado con importantes efectos en la salud humana desde los primeros años de vida. Estudios han demostrado con certeza que la exposición al humo de tabaco y humo de leña está directamente relacionada con enfermedades cardiovasculares, pulmonares, respiratorias y cánceres. Sin embargo, la exposición a la contaminación del aire durante el desarrollo fetal y sus efectos a posteriori sobre la estructura y función del cerebro durante la primera infancia y la adolescencia son aún desconocidos. En esta revisión analizamos la literatura sobre la exposición prenatal al tabaco y al humo de leña y su relación con el desarrollo hipotalámico y la cognición en los primeros años de vida. Los aspectos moleculares, morfológicos y fisiológicos de la asociación entre la exposición pre y postnatal al humo de tabaco o al humo de leña con problemas del desarrollo neurológico normal, cognitivos y de comportamiento durante la primera infancia y la adolescencia aún no se han aclarado completamente. La información disponible en la literatura científica basada en antecedentes obtenidos de estudios epidemiológicos ha sido afectada negativamente por variables de confusión y grandes desafíos metodológicos que hacen imposible afirmar una relación directa y causal exacta con certeza.

Emissões otoacústicas em neonatos expostos ao fumo durante a gestação / Otoacoustic emissions in neonates exposed to smoke during pregnancy

Resumo Introdução: As substâncias tóxicas presentes na fumaça do cigarro podem danificar as células ciliadas da cóclea. Esse efeito foi investigado pela mensuração das emissões otoacústicas. Objetivo: Investigar o impacto de estímulos nas emissões otoacústicas, comparar neonatos com e sem exposição à fumaça de cigarro durante a gestação. Método: Testes de emissões otoacústicas evocadas transientes, evocadas por estímulo tipo clique e emissões otoacústicas por produto de distorção, evocadas por dois tons, foram feitos em ambas as orelhas, com um aparelho Interacoustic TITAN. O estudo incluiu 105 neonatos divididos em dois grupos: um grupo de estudo, que compreendeu 47 neonatos expostos à fumaça durante a gravidez; e um grupo controle constituído por 58 neonatos que não foram expostos. Todos os participantes apresentaram triagem auditiva neonatal normal. Resultados: Não foram encontradas diferenças estatísticas nos níveis de resposta das emissões otoacústicas por produto de distorção entre os grupos. Nos testes de emissões otoacústicas evocadas transientes, foram observados menores níveis de resposta no grupo de estudo do que no grupo controle na análise de bandas de frequências da orelha direita, com diferenças estatisticamente significantes nos sinais e relação sinal-ruído (exceto a 1 kHz). Conclusão: O impacto da exposição ao fumo pôde ser analisado por meio das emissões otoacústicas evocadas transientes em neonatos. O efeito da exposição à fumaça durante a gravidez foi evidenciado por uma redução nos níveis das emissões otoacústicas evocadas transientes no grupo exposto. Esse mesmo efeito não foi observado para as análises feitas nos níveis das emissões otoacústicas por produto de distorção.

Development and application of a moxibustion instrument with multi-jointed manipulator / 中国针灸

In view of the limitations of the existing moxibustion instruments, i.e. possible accidental injury when using moxibustion instruments, the negative effects of products from moxibustion instruments on treatment efficacy and health of medical staff and patients, a moxibustion instrument with multi-jointed manipulator is designed. This moxibustion instrument could accurately control the temperature, maintain a safe moxibustion distance, automatically process the burning ashes of moxa and selectively handle moxa smoke. The experimental results shows that this instrument could maintain the constant temperature of target acupoint, reduce the risk of empyrosis, and reasonably deal with the products of moxibustion. The purification rate of moxa smoke is 44.9%, which not only ensures the therapeutic effect of moxa smoke, but also reduces the negative effects of high-concentration moxa smoke on the health of medical staff and patients.

Effect of different concentrations of moxa smoke exposure on nasal mucosal injury and expression of serum IL-1, IL-6 and TNF-α in rats / 中国针灸

OBJECTIVE@#To observe the effect of long-term moxa smoke exposure of different concentrations on olfactory function in rats, and provide experimental basis of safety study of moxa smoke produced by moxibustion.@*METHODS@#Forty SD rats were randomly divided into a normal control group, a low-concentration moxa smoke group, a moderate-concentration moxa smoke group and a high-concentration moxa smoke group, 10 rats in each one. The rats in the moxa smoke groups were put into three plexiglass moxibustion boxes with different moxa smoke concentrations, 4 hours per times, twice a day for 90 days. The general state of rats was evaluated before and during the experiment. After the intervention, the olfactory function was evaluated by two-bottle experiment (TBE); the morphology of nasal mucosa was observed by HE staining; the apoptosis of olfactory epithelial cells in nasal mucosa was detected by TUNEL method; the serum levels of interleukin-1 (IL-1), interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) were detected by ELISA method.@*RESULTS@#In the late stage of moxa smoke exposure (45-90 days into intervention), the behavioral activity of rats in the moderate-concentration moxa smoke group and the high-concentration moxa smoke group was weaker than that in the normal control group, and their response to stimulation was strong, and their mental state was worse. After intervention, the drinking rate of vinegar-water mixture in the moderate-concentration moxa smoke group and the high-concentration moxa smoke group was higher than that in the normal control group and the low-concentration moxa smoke group (@*CONCLUSION@#The long-term exposure to low, moderate and high concentrations of moxa smoke could cause pathological changes in nasal mucosa and increase the serum levels of IL-1, IL-6 and TNF-α; the moderate and high concentrations of moxa smoke exposure could cause a series of damage to olfactory function and reduce olfactory sensitivity in rats.

Analysis of furans and pyridines from new generation heated tobacco product in Japan

BACKGROUND@#In recent years, heated tobacco products (HTPs), which are widely used in Japan, have been sold by various brands using additives such as flavors. It has been reported that the components of mainstream smoke are different from those of conventional cigarettes. In this study, we established an analytical method for furans and pyridines in the mainstream smoke, which are characteristic of HTPs and particularly harmful among the generated components, and investigated the amount of component to which the smokers are exposed.@*METHODS@#We established a simple analytical method for simultaneous analysis of gaseous and particulate compounds in the mainstream smoke of HTPs (IQOS, glo, ploom S) in Japan by combining a sorbent cartridge and glass fiber filter (Cambridge filter pad (CFP)). Both the sorbent cartridge and CFP were extracted using 2-propanol and analyzed via GC-MS/MS to determine the concentration of furans and pyridines generated from each HTP.@*RESULTS@#The results showed that the levels of target furans such as furfural, 2-furanmethanol, 2(5H)-furanone, and 5-methylfurfural tended to be higher in the mainstream smoke of glo than in standard cigarettes (3R4F). Pyridine, which is generated at a high level in 3R4F as a combustion component, and 4-ethenylpyridine (EP), which is a known marker of environmental tobacco smoke, were detected. Among these components, 2-furanmethanol and pyridine are classified as Group 2B (possibly carcinogenic to humans) by the International Agency for Research on Cancer (IARC). Therefore, it is possible that they will contribute to the health effects caused by use of HTPs.@*CONCLUSIONS@#Using the new collection and analytical method for furans and pyridines in the mainstream smoke of HTPs, the level of each compound to which smokers are exposed could be clarified. By comprehensively combining information on the amount of ingredients and toxicity, it will be possible to perform a more detailed calculation of the health risks of using HTPs. In addition, the components detected in this study may be the causative substances of indoor pollution through exhaled smoke and sidestream smoke; therefore, environmental research on the chemicals generated from HTPs would be warranted in future studies.

Efeito da exposição a produtos fumígenos sobre a expressão de metalotioneínas durante a artrite experimental e sobre linfócitos T / Effect of exposure to tobacco-related products on metallothionein expression in the experimental arthritis and on T lymphocytes functions

Produtos liberados pela queima do cigarro convencional (CC) estão relacionados com a progressão clínica da artrite reumatoide (AR). Produtos fumígenos não combustíveis surgiram com a premissa de apresentarem menor toxicidade que o CC, dentre os quais está o tabaco aquecido (heat-not-burn tobacco; HNBT). Neste projeto investigamos os efeitos do HNBT sobre eventos envolvidos na AR, focando na sintomatologia, expressão de metalotioneínas (MTs), e na biologia de linfócitos T CD4+ primários e da linhagem Jurkat. Exposições in vivo ao ar, CC ou HNBT foram realizadas 2 vezes ao dia, 1 hora cada (12 CC ou 24 HNBT/hora), nos dias 14-21 da indução da artrite induzida por antígeno (AIA) em camundongos C57Bl/6. Foram realizadas análises dos parâmetros clínico da doenças, histopatologia e imunohistoquímica; quantificação de nicotina e cotinina séricas por cromatografia líquida acoplada a espectrometria de massas (MS). Os efeitos das exposições in vitro sobre linfócitos T foram mensurados por citometria de fluxo e ELISA. A concentração de metais emitidas pelo CC ou HNBT durante as exposições foram mensurados por MS com plasma acoplado. Camundongos expostos ao CC apresentaram intensa inflamação pulmonar, expressões acentuadas de MTs hepáticas e pulmonares e exacerbação dos parâmetros de AIA quando comparados ao grupo expostos ao HNBT. Animais expostos ao CC ou ao HNBT apresentaram redução na celularidade de órgãos linfoides. Somente a exposição in vitro ao CC causou estresse oxidativo e secreção de citocinas inflamatórias, ativação do receptor de hidrocarbonetos arila (AhR) e polarização de células Th17. Diferentemente, exposição ao CC ou ao HNBT provocaram redução da secreção de IL-2 e proliferação de células Jurkat. A exposição de células Jurkat à nicotina mimetizou os efeitos inibitórios da exposição ao HNBT sobre a secreção de IL-2 e proliferação de linfócitos T. O CC liberou maiores concentrações de metais nas câmaras de exposição. Associados, nossos resultados mostram que embora exposições ao HNBT não exacerbem parâmetros inflamatórios de AIA e nem em funções linfócitos T, ambos produtos prejudicam a celularidade de órgãos linfoides e a proliferação e secreção de IL-2 por linfócitos T

Products released by burning conventional cigarettes (CC) are related to the worsening of rheumatoid arthritis (RA). Non-combustible smoking products appeared with the premise of presenting less toxicity than the CC, among which is the heated tobacco (heat-not-burn tobacco; HNBT). Here, we investigate the effects of HNBT on events involved in RA, focusing on symptoms, expression of metallothioneins (MTs), and on the biology of primary CD4+ T lymphocytes and the Jurkat T cell lineage. In vivo exposures to air, CC or HNBT were performed twice a day, 1 hour each (12 CC or 24 HNBT / hour), on days 14-21 of the induction of antigen-induced arthritis (AIA) in C57Bl / 6 mice. Analyzes of the clinical parameters of the AIA, histopathology, and immunohistochemistry were performed; quantification of nicotine and cotinine by liquid chromatography coupled to mass spectrometry (MS). The in vitro effects of exposures on T lymphocytes were measured by flow cytometry and ELISA. The concentration of metals released by the CC or HNBT during the exposures was measured by MS with coupled plasma. Mice exposed to CC showed intense pulmonary inflammation, marked expressions of hepatic and pulmonary MTs, and exacerbation of AIA parameters when compared to the group exposed to HNBT. Animals exposed to CC or HNBT showed a reduction in the cellularity of lymphoid organs. Only in vitro exposure to CC caused oxidative stress and secretion of inflammatory cytokines, activation of the aryl hydrocarbon receptor (AhR), and polarization of Th17 cells. However, exposure to CC or HNBT led to reduced secretion of IL-2 and proliferation of Jurkat cells. The exposure of Jurkat T cells to nicotine mimicked the inhibitory effects of exposure to HNBT on IL-2 secretion and T lymphocyte proliferation. The CC released higher concentrations of metals in the exposure chambers. In association, our results show that although exposures to HNBT do not exacerbate inflammatory parameters of AIA or T lymphocyte functions, both products impair lymphoid organ cell function and the proliferation and secretion of IL-2 by T lymphocytes

Impact of exposure to smoke from biomass burning in the Amazon rain forest on human health / Impacto da exposição à fumaça da queima de biomassa na Floresta Amazônica na saúde humana

ABSTRACT This review study aimed to determine the relationship between exposure to smoke from biomass burning in the Amazon rain forest and its implications on human health in that region in Brazil. A nonsystematic review was carried out by searching PubMed, Google Scholar, SciELO, and EMBASE databases for articles published between 2005 and 2021, either in Portuguese or in English, using the search terms "biomass burning" OR "Amazon" OR "burned" AND "human health." The review showed that the negative health effects of exposure to smoke from biomass burning in the Amazon have been poorly studied in that region. There is an urgent need to identify effective public health interventions that can help improve the behavior of vulnerable populations exposed to smoke from biomass burning, reducing morbidity and mortality related to that exposure.

RESUMO Este estudo de revisão teve como objetivo determinar a relação entre a exposição à fumaça da queima de biomassa na Floresta Amazônica e suas implicações para a saúde humana nessa região do Brasil. Foi realizada uma revisão não sistemática por meio de buscas nas bases de dados PubMed, Google Scholar, SciELO e EMBASE de artigos publicados entre 2005 e 2021, em português ou inglês, utilizando os termos de busca "biomass burning" OU "Amazon" OU "burned" E "human health". A revisão mostrou que os efeitos negativos para a saúde resultantes da exposição à fumaça da queima de biomassa na Amazônia foram pouco estudados na região. Há uma necessidade urgente de identificar intervenções efetivas de saúde pública que possam ajudar a melhorar o comportamento das populações vulneráveis expostas à fumaça da queima de biomassa, reduzindo a morbimortalidade relacionada a essa exposição.

Uso da máscara n95 por trabalhadores de enfermagem expostos à fumaça cirúrgica / Uso de la mascarilla n95 por trabajadores de enfermería expuestos al humo quirúrgico / Use of the n95 mask by nursing workers exposed to surgical smoke

RESUMO Objetivo: verificar os desconfortos apresentados por trabalhadores que necessitam utilizar a máscara N95 durante as suas atividades laborais. Método: pesquisa descritiva com delineamento transversal, desenvolvida no Centro Cirúrgico de um hospital de ensino localizado na região Sul do Brasil, no período de junho a agosto de 2019, durante o turno de trabalho diurno. Realizou-se o estudo com os profissionais de enfermagem que estavam expostos à fumaça cirúrgica no período de trabalho. Para a coleta dos dados, utilizou-se um instrumento com detalhamento sociodemográfico e ocupacional dos participantes e entregou-se uma máscara N95 aos profissionais para ser utilizada durante a cirurgia, a fim de verificar o tempo de uso da N95 e os motivos pelos quais os trabalhadores retiraram a máscara durante o ato anestésico-cirúrgico. Resultados: o maior número de trabalhadores (27,7%) utilizou a máscara até 3 horas durante o ato anestésico-cirúrgico, sendo que esse tempo foi relacionado com algumas queixas (p=0,037), tais como incômoda (27,8%), apertada (44,4%) eenjoo (5,6%). A retirada da máscara N95 (p=0,022) por esses profissionais antes do término da cirurgia foi relacionada a essas queixas. Conclusão: os trabalhadores apresentam queixas, como desconforto, máscara apertada e enjoo, sendo que estas estão relacionadas com o tempo de uso, o que precisa ser avaliado por gestores para a utilização da N95.

RESUMEN Objetivo: verificar las molestias presentadas por trabajadores que necesitan usar la mascarilla N95 durante sus actividades laborales. Método: investigación descriptiva con delineamiento transversal, desarrollada en el Centro Quirúrgico de un hospital de enseñanza ubicado en la región Sur de Brasil, en el período de junio a agosto de 2019, durante el turno de trabajo diurno. Se realizó el estudio con los profesionales de enfermería que estaban expuestos al humo quirúrgico en el período de trabajo. Para la recolección de los datos, se utilizó un instrumento con detalle sociodemográfico y ocupacional de los participantes y se entregó una mascarilla N95 a los profesionales para ser utilizada durante la cirugía, con el fin de verificar el tiempo de uso de la N95 y las razones por las que los trabajadores la quitaron durante el acto anestésico-quirúrgico. Resultados: el mayor número de trabajadores (27,7%) la utilizó hasta 3 horas durante el acto anestésico-quirúrgico, siendo que ese tiempo fue relacionado con algunas quejas (p=0,037), tales como: incómoda (27,8%), apretada (44,4%) y mareos (5,6%). El hecho de quitarse la mascarilla N95 (p=0,022), por estos profesionales, antes de la finalización de la cirugía se relacionó con estas quejas. Conclusión: los trabajadores presentan quejas, como incomodidad, mascarilla apretada y mareos, siendo que estas están relacionadas con el tiempo de uso, lo que necesita ser evaluado por gestores para la utilización de la N95.

ABSTRACT Objective: to check the discomfort presented by workers who need to use the N95 mask during their work activities. Method: descriptive and cross-sectional research, developed in the Surgical Center of a teaching hospital located in Southern Brazil, from June to August 2019, during the daytime work shift. The study was conducted with nursing professionals who were exposed to surgical smoke during their work period. In order to collect data, an instrument was used with sociodemographic and occupational details of the participants and a N95 mask was given to professionals to be used during surgery, in order to check the time of use of the N95 and the reasons why the workers removed the mask during the anesthetic-surgical procedure. Results: the largest number of workers (27.7%) used the mask for up to 3 hours during the anesthetic-surgical procedure, and this time was related to some complaints (p=0.037), such as discomfort (27.8%), tightness (44.4%) and nausea (5.6%). The removal of the N95 mask (p=0.022) by these professionals before the end of the surgery was related to these complaints. Conclusion: workers have complaints such as discomfort, tight mask and nausea, and these are related to the time of use, which needs to be assessed by managers for the use of N95.

Impact of maternal exposure to wood smoke pollution on fetal lung morphology in a rat model / Impacto de la exposición materna a la contaminación por humo de leña en la morfología pulmonar fetal en un modelo de rata

SUMMARY: Residential heating with wood is an important source of ambient air pollution. Evidence links air pollution to serious health effects such as respiratory and cardiovascular mortality and morbidity. We hypothesized that prenatal exposure to wood smoke pollution causes morphological changes in the development of the rat lung, leading to altered lung structure and function during later life. We presumed that analysis of the fetal lung stereology provides novel insights into the underlying processes mediating particulate matter associated developmental changes and damage. The objective of the study was to investigate the effects of exposure during gestational period to wood smoke pollution on lung fetal morphology. To test this, pregnant rats were exposed during pregestational and gestational periods to wood smoke pollution. Complete lungs samples were obtained from 24 fetus from healthy female G3 rats subjected to cesarean at 19 days post-fecundation. The lungs were prepared for histological and stereological analysis. The volume fraction of terminal bronchioles VV [tb, lung] and volume fraction of parenchyma VV [par, lung], surface density of terminal bronchioles SV [tb, lung] as well as numerical density of bronchiolar exocrinocytes NA [ec,lung] were calculated by light microscopy. Statistical analysis detected significant differences between groups in volume density VV [tb, lung; %] (p=0.0012) and surface density SV [tb, lung; mm2/mm3] (p<0.0001) of the terminal bronchioles. However, it did not show differences between groups in the stereological parameter volume density VV [par, lung; %] (p=0.0838) and numerical density of bronchiolar exocrinocytes NA [ec,lung; nº/mm2] (p=0.0705). The analysis of the evidence obtained indicates that exposure to environmental pollution was affects lung maturation, and particularly the proportion and area of terminal bronchioles in the fetal lung. In conclusion, maternal exposure to wood smoke pollution during pregnancy was associated with a decrease in the lower conducting airways of lungs, which, according to urban pollution studies, could be related to early childhood lower respiratory illness. The public health implications of this study are that reducing or avoiding exposure to wood smoke is important before and during pregnancy.

RESUMEN: La calefacción residencial con leña es una fuente importante de contaminación ambiental. La evidencia vincula la contaminación del aire con graves efectos sobre la salud, como la mortalidad y la morbilidad respiratoria y cardiovascular. Hipotetizamos que la exposición prenatal a la contaminación por humo de leña causa cambios en el desarrollo del pulmón de rata, lo que conduce a una morfo-función pulmonar alteradas durante la vida posterior, creemos que el análisis de la estereología pulmonar fetal proporcionará nuevos conocimientos sobre los procesos subyacentes que median esos cambios. El objetivo del estudio fue investigar los efectos de la exposición prenatal a la contaminación ambiental por humo de leña sobre la morfología pulmonar fetal. Ratas preñadas fueron expuestas durante los períodos pregestacional y gestacional a la contaminación por humo de leña. En fetos de 19 días post-fecundación fue obtenido el pulmón para análisis histológico y estereológico. Fue determinado la fracción de volumen de bronquiolos terminales VV [tb, pulmón], fracción de volumen del parénquima VV [par, pulmón], densidad superficial de los bronquiolos terminales SV [tb, pulmón] así como la densidad numérica de exocrinocitos NA [ec, pulmón]. El análisis estadístico detectó diferencias significativas entre grupos en la densidad de volumen V [tb, pulmón; %] (p=0,0012) y densidad superficial SV [tb, pulmón; mm2/mm3] (p<0,0001) de los bronquiolos terminales. Sin embargo, no demostró diferencias entre grupos en la densidad de volumen VV [par, pulmón; %] (p=0,0838) y numérica de exocrinocitos bronquiolares NA [ec, pulmón; nº / mm ] (p=0,0705). El análisis de la evidencia obtenida indica que la exposición a la contaminación ambiental afectó la maduración pulmonar, y particularmente la proporción y área de bronquiolos terminales en el pulmón fetal. En conclusión, la exposición materna a la contaminación por humo de leña durante la gestación se asoció a una disminución de las vías respiratorias conductoras de aire en pulmón, lo que, según estudios de contaminación urbana, podría estar relacionado con enfermedades de las vías respiratorias inferiores en la primera infancia. Las implicaciones para la salud pública de este estudio son que reducir o evitar la exposición al humo de leña es importante previo y durante la gestación. Por otro lado, la contaminación por humo de leña tiene un gran impacto en la salud pública que, en teoría, es posible prevenir.

Exposure to wood smoke pollution during pre-gestational period of rat has effects on placenta volume and fetus size / La exposición a la contaminación por humo de leña durante el período pregestacional de la rata tiene efectos sobre el volumen de la placenta y el tamaño del feto

SUMMARY: Studies in humans showed that prenatal exposure to urban air pollution (AP) influences fetal development, and increases the incidence of adverse pregnancy outcomes and some diseases in postnatal life. However, most of these were performed in environments where the main source of environmental particulate matters (PM) emission is diesel combustion by motor vehicles and industries, thereby ignoring the effects produced by wood smoke pollution. We hypothesized that morphological changes in the placenta could contribute to the reduction in fetal size associated with different periods of exposure to AP produced by wood smoke pollution prior to and during pregnancy. The objective of the study was to investigate the quantitative effects of long-term exposure to environmental levels of wood smoke pollution on the macroscopic and microscopic morphology of the placenta in rats. To test this, pregnant rats were exposed during pregestational and gestational periods to wood smoke pollution in indoor and outdoor environments. At 19 days of gestation, the placentas were obtained by caesarean and were prepared for histological, planimetric and stereological analysis. The volume and proportions of the placental compartments were estimated. In addition, stereological estimators in fetal capillaries were calculated in the labyrinth region. Crown rump length, fetus weight and litter weight were influenced by pregestational and gestational exposure periods. Exposure to wood smoke pollution during pregestational period has significant effect on the volume of the placenta, and consequently on fetal height. In conclusion, this study demonstrated that long-term outdoor exposure to wood smoke pollution from residential heating affects fetal health, decreasing the absolute volume of the entire placenta and the placental interface between the mother and fetus, decreasing the total volume of blood vessels present in the labyrinth region ofthe placenta and affecting the size of the fetus.

RESUMEN: Estudios en humanos demostraron que la exposición prenatal a la polución del aire urbano influye en el desarrollo fetal y aumenta la incidencia de resultados adversos de la gestación y algunas enfermedades postnatales. Sin embargo, la mayoría de ellos fueron realizados en entornos donde la principal fuente de emisión de material particulado, fue la combustión de petróleo por vehículos a motor e industrias, ignorando los efectos producidos por el humo de leña producido por la calefacción intradomiciliaria. Hipotetizamos respecto a que los cambios de la placenta contribuirían a la disminución del tamaño fetal relacionado a los períodos de exposición al humo de leña durante los periodos pregestacional y gestacional. El objetivo del estudio fue investigar los efectos cuantitativos de la exposición al humo de leña sobre la morfología macroscópica y microscópica en placenta de ratas. Para probar esto, ratas preñadas fueron expuestas durante los períodos pregestacional y gestacional a la contaminación por humo de leña en ambientes interiores y exteriores. A los 19 días de gestación, las placentas fueron obtenidas por cesárea y fueron preparadas para un análisis histológico, planimétrico y estereológico. Fue estimado el volumen absoluto y las proporciones de los compartimentos placentarios. Además, fueron calculados estimadores estereológicos en capilares fetales del laberinto y trofoblasto. La longitud, el peso del feto y el peso de la camada fueron influenciados por los períodos de exposición pregestacional y gestacional. La exposición a la contaminación por humo de leñá durante el período pregestacional tuvo un efecto significativo en el volumen de la placenta y, en consecuencia, en la altura del feto. En conclusión, este estudio demostró que la exposición a largo plazo al humo de leña afecta la salud del feto, disminuyendo el volumen absoluto de la placenta, además, afecta la interfaz placentaria entre la madre y feto, disminuyendo el volumen total de vasos sanguíneos presentes en la región del laberinto placentario y por consecuente afectando el tamaño del feto.