SHORT-TERM EFFECT OF DIFFERENT SIZE PARTICULATE MATTERS ON PEAK EXPIRATORY FLOW RATE OF ASTHMATIC CHILDREN IN ELEMENTARY SCHOOL

Various studies have indicated that particulate matter <2.5 μm (PM2.5) could cause adverse health effects on pulmonary functions in susceptible groups, especially asthmatic children. Although the impact of ambient PM2.5 on children’s lower respiratory health has been well-established, information regarding the associations between indoor PM2.5 levels and respiratory symptoms in asthmatic children is relatively limited. This randomized, crossover intervention study was conducted among 26 asthmatic children’s homes located in Incheon metropolitan city, Korea. We aimed to evaluate the effects of indoor PM2.5 on children’s peak expiratory flow rate (PEFR), with a daily intervention of air purifiers with filter on, compared with those groups with filter off. Children aged between 6–12 years diagnosed with asthma were enrolled and randomly allocated into two groups. During a crossover intervention period of seven weeks, we observed that, in the filter-on group, indoor PM2.5 levels significantly decreased by up to 43%. (p < 0.001). We also found that the daily or weekly unit (1 μg/m3) increase in indoor PM2.5 levels could significantly decrease PEFR by 0.2% (95% confidence interval (CI) = 0.1 to 0.5) or PEFR by 1.2% (95% CI = 0.1 to 2.7) in asthmatic children, respectively. The use of in-home air filtration could be considered as an intervention strategy for indoor air quality control in asthmatic children’s homes.

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Effects of Short-term 28% and 100% Oxygen on Paco2 and Peak Expiratory Flow Rate in Acute Asthma

CHEST Journal ◽

10.1378/chest.124.4.1312 ◽

2003 ◽

Vol 124 (4) ◽

pp. 1312-1317 ◽

Cited By ~ 53

Author(s):

Gustavo J. Rodrigo ◽

Mario Rodriquez Verde ◽

Virginia Peregalli ◽

Carlos Rodrigo

Keyword(s):

Peak Expiratory Flow ◽

Flow Rate ◽

Peak Expiratory Flow Rate ◽

Acute Asthma ◽

Short Term ◽

Expiratory Flow

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Effects of personal particulate matter on peak expiratory flow rate of asthmatic children

The Science of The Total Environment ◽

10.1016/j.scitotenv.2007.04.016 ◽

2007 ◽

Vol 382 (1) ◽

pp. 43-51 ◽

Cited By ~ 24

Author(s):

Chin-Sheng Tang ◽

Li-Te Chang ◽

Hsien-Chi Lee ◽

Chang-Chuan Chan

Keyword(s):

Particulate Matter ◽

Peak Expiratory Flow ◽

Flow Rate ◽

Peak Expiratory Flow Rate ◽

Asthmatic Children ◽

Expiratory Flow

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Effects of Walking on Peak Expiratory Flow Rate in Four Asthmatic Children

Perceptual and Motor Skills ◽

10.2466/pms.1988.67.3.847 ◽

1988 ◽

Vol 67 (3) ◽

pp. 847-852

Author(s):

William B. Karper

Keyword(s):

Side Effects ◽

Peak Expiratory Flow ◽

Flow Rate ◽

Peak Expiratory Flow Rate ◽

Asthmatic Children ◽

Medication Side Effects ◽

Medication Side ◽

Expiratory Flow

The effect of walking on peak expiratory flow rate (PEFR) of four asthmatic children is reported. Subjects 1 and 2 exercised three days per week and Subjects 3 and 4 exercised two days per week during this 9-mo. study. Subjects 1 and 3 exercised for 10 wk., did not exercise for 11 wk., and exercised again for 11 wk. Subjects 2 and 4 did not exercise for 10 wk., exercised for 11 wk., and again did not exercise for 11 wk., Subjects 1, 2, and 4 had a higher mean PEFR during exercise than during no exercise, and Subject 3 had a lower mean PEFR during exercise than during no exercise. These results suggest that walking may positively influence PEFR of selected asthmatic children if factors such as environment, allergies, and medication side-effects can be controlled.

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