High Frequency of Emergency Room Visits of Asthmatic Children on Misty or Foggy Nights

Kashiwabara, Kosuke; Kohrogi, Hirotsugu; Ota, Kosuke; Moroi, Toshihiro

doi:10.1081/jas-120015794

Cited by 24 publications

(22 citation statements)

References 14 publications

(17 reference statements)

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“…The effects of climate factors on asthma attacks among children have been a focus of attention for many years, with Anderson et al [9] reporting in 1983 that fine water particles produced by ultrasonic nebulization induced asthma attack among children. In line with the hypothesis of Anderson et al, Kashiwabara et al [14] observed that the visits of children with bronchial asthma to a clinical emergency department(s) increased significantly on misty or foggy nights, suggesting that air-borne fine water particles may stimulate bronchoconstriction and induce asthma. In contrast, Weiland et al [15] summarized the results of a large-scale questionnaire survey and reported that annual variation in outdoor temperature and relative humidity was negatively associated with asthma symptoms among children.…”

Section: Discussionsupporting

confidence: 55%

“…ozone) may be different between the child and adult asthmatic patients [7]. Nevertheless, Kashiwabara et al [14] confirmed that the visits of asthmatic children to an emergency room of a hospital were significantly more frequent at foggy or misty nights. Kashiwabara et al [20] analyzed the relation of visits by asthmatic children and meteorological factors on foggy or misty nights and compared these with such factors on fine nights.…”

Section: Discussionmentioning

confidence: 90%

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Correlation of light transmittance with asthma attack: fine water particles as a possible inducing factor of asthma

Kanaya¹,

Okamoto

Shimbo

et al. 2010

Environ Health Prev Med

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Background and objectives It has been postulated that air-borne fine water particles (or mist) can induce asthma attacks in asthmatic children. To date, no attempt has been made to quantify the density of air-borne fine water particles with the aim of relating particle density to the etiology of asthma among children. The aim of this study was to investigate the relation of asthma attack frequency and the particle density evaluated in terms of light transmittance. Methods The density of fine water particles was quantified by measuring reductions in light transmittance at 250, 365 and 580 nm at an outdoor location when the surroundings were in darkness. The measurements were made at distances varying from 1 to 3 m from the light sources and performed every morning and evening for 1 year. Each day was separated into two half-day units [i.e., morning (from midnight to noon) and afternoon (from noon to midnight)]. The number of asthma attacks among 121 enrolled asthmatic children was counted for each unit. A possible correlation between the transmittance reduction and frequency of asthma attacks was assessed. Results A significant difference was observed in the extent of reduction in light transmittance at 365 nm between the units with asthma attacks and those without attacks. Furthermore, the reduction in the transmittance was more evident when more asthma attacks were recorded among the patients. No difference was detected in the reduction in light transmittance at 250 or 580 nm. Conclusions These results support the hypothesis that airborne fine water particles are among the etiological factors that induce asthma attacks in asthmatic children.

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Section: Discussionsupporting

confidence: 55%

Section: Discussionmentioning

confidence: 90%

Correlation of light transmittance with asthma attack: fine water particles as a possible inducing factor of asthma

Kanaya¹,

Okamoto

Shimbo

et al. 2010

Environ Health Prev Med

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“…The seasonal reasons for the increase in the number of cases of asthma have been explained in terms of meteorological parameters and air pollution factors (Hwang et al, 2011). As for the meteorological parameters, many studies have found that the symptoms may be related to temperature (Beer et al, 1991;Yuksel et al, 1996;Crighton et al, 2001;García Pina et al, 2008, Lim et al, 2012, the relative humidity and rain patterns (Magas et al, 2007), fog (Kashiwabara et al, 2002;Villeneuve et al, 2005), wind speed (Hashimoto et al, 2004), or changes in the barometric pressure and storms (Sutherland and Hall, 1994;Newson et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Influence of Meteorological Parameters and Air Pollutants onto the Morbidity due to Respiratory Diseases in Castilla-La Mancha, Spain

Monsalve

Tomás

Fraile

2013

Aerosol Air Qual. Res.

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This study considers the relationship between the risk of hospital admission due to respiratory diseases, the daily weather, and the air pollution conditions between 2000 and 2006. A synoptic climatological approach is used to investigate the links between weather types and all hospital admissions due to respiratory diseases in Castilla-La Mancha (CLM), Spain. The main circulation weather types (CWTs) were determined for winter and spring, the seasons with the highest percentage of hospital admissions, and the frequency distribution of these types was also analyzed. The study includes a summary of the main characteristics of the hospital admission series and their distribution over the study period of seven years, as well as the frequency distributions of the admissions classified by gender and age, for each season, month and day of the week. In addition, an admission index was used to compare CWTs and hospital admissions due to respiratory diseases. The results show distinctly different responses of daily respiratory disease admission rates (RD) to the eight CWTs identified in winter and in spring. In winter, three CWTs (southwesterly (SW), anticyclonic (A) and hybrid anticyclonic southwesterly (HASW)) present values 1.5 times above the average admission rates. In contrast, there are no significant differences in spring. Finally, the results of Principal Component Analysis applied to the daily series of meteorological parameters, atmospheric pollutants and morbidity data revealed that in winter the decrease in RD is related to increases in temperature and pressure. These results represent an important step in identifying reliable connections between weather-air pollutants and human health.

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“…The seasonal causes of the increases in asthma have been explained in terms of meteorological and pollutant variables. Regarding the meteorological variables, different authors have concluded that the symptoms may be related to the temperature prevailing during cold periods (Beer et al, 1991;Yuksel et al, 1996), changes in temperature (Crighton et al, 2001), relative humidity and rainfall (Celenza et al, 1996), fog (Kashiwabara et al, 2002), wind speed (Hashimoto et al, 2004), and changes in barometric pressure and storms (Sutherland and Hall, 1994;Newson et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Effects of weather types on hospital admissions for respiratory diseases in Castilla-La Mancha, Spain

Dávila¹,

Soriano²,

Llorente³

et al. 2013

Atmósfera

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El objetivo de este estudio consiste en evaluar la relación entre el riesgo de ingreso hospitalario por enfermedades respiratorias habidos en hospitales de Castilla-La Mancha, España, y los tipos diarios de masas de aire (situaciones meteorológicas) presentes durante el periodo 2000-2006, utilizando un enfoque climatológico sinóptico. Se determinaron los principales tipos de circulación atmosférica presentes en la zona para el invierno y la primavera (estaciones en que las admisiones hospitalarias de carácter respiratorio son máximas), así como sus distribuciones de frecuencia. Se analizan las características principales de los ingresos hospitalarios y su distribución en los siete años estudiados, junto con las distribuciones de frecuencia clasificadas por sexo y edades, estaciones climáticas, meses y días de la semana. Además, se realiza un análisis entre la clasificación obtenida de masas de aire y los ingresos hospitalarios, mediante la utilización de un índice de admisión o tasa relativa. Los resultados revelan diferentes respuestas en la tasa de ingreso por enfermedades respiratorias frente a los ocho tipos de masas de aire identificados en invierno y en primavera. En invierno, las tres masas de aire dominantes que se asocian, las circulaciones del suroeste, las anticiclónicas y las híbridas anticiclónicas del suroeste, presentan valores 1.5 veces superiores al promedio de ingresos respectivos, mientras que en la primavera no se observan diferencias significativas en el número de admisiones frente a los tipos de tiempo. ABSTRACTThe aim of this study is to evaluate the relationship between the risk of hospital admission for respiratory diseases (RD) and the daily weather types during the period 2000-2006. A synoptic climatological approach is used to investigate links between air-mass types (weather situations) and all respiratory hospital admissions in the Castilla-La Mancha (CLM) area in Spain. This afforded the main circulation weather types (CWTs) for the winter and spring periods (since respiratory hospital admissions reached their maximum during these seasons) and the frequency distributions of these types were analyzed. A summary of the main characteristics of the hospital admission series and their distribution over the seven years studied, together with the frequency distributions of the admissions classified by sex and ages, for season, month and for each day of the week, is reported. In addition, a comparison between air-mass classification and hospital admissions is made using an admission index (AI). The results reveal different responses of respiratory admission rates to the eight air-mass types identified in winter and in spring. In winter, three air massess southwesterly (SW), anti-cyclonic (A) and hybrid anti-cyclonic southwesterly (HASW), are associated with values 1.5 times higher than the respective average admission rates, while in spring no significant differences are seen.

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High Frequency of Emergency Room Visits of Asthmatic Children on Misty or Foggy Nights

Cited by 24 publications

References 14 publications

Correlation of light transmittance with asthma attack: fine water particles as a possible inducing factor of asthma

Correlation of light transmittance with asthma attack: fine water particles as a possible inducing factor of asthma

Influence of Meteorological Parameters and Air Pollutants onto the Morbidity due to Respiratory Diseases in Castilla-La Mancha, Spain

Effects of weather types on hospital admissions for respiratory diseases in Castilla-La Mancha, Spain

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