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Original Article
Fractional exhaled nitric oxide and forced expiratory flow between 25% and 75% of vital capacity in children with controlled asthma
Ji-Yong Yoon, Sung-Il Woo, Heon Kim, Yong-Han Sun, Youn-Soo Hahn
Clin Exp Pediatr. 2012;55(9):330-336.   Published online September 14, 2012
Purpose

Fractional exhaled nitric oxide (FeNO) and forced expiratory flow between 25% and 75% of vital capacity (FEF25-75) are not included in routine monitoring of asthma control. We observed changes in FeNO level and FEF25-75 after FeNO-based treatment with inhaled corticosteroid (ICS) in children with controlled asthma (CA).

Methods

We recruited 148 children with asthma (age, 8 to 16 years) who had maintained...

The quality control and acceptability of spirometry in preschool children
Hyun Kyong Seo, Sun Jung Chang, Da Woon Jung, Young Sun Wee, Hye Mi Jee, Ji Young Seo, Man Yong Han
Clin Exp Pediatr. 2009;52(11):1267-1272.   Published online November 15, 2009
Purpose : We examined the ability of preschool aged children to meet the American Thoracic Society (ATS) and European Resiratory Society (ERS) goals for spirometry quality and tried to find out the major factor for improving the rate of success of spiromety test in this age group. Methods : Spirometry was performed in 2-6 aged 155 children with chronic cough or...
A comparison between impulse oscillometry system and spirometry for spirometry for detecting airway obstruction in children
Hae Young Hur, Ji Hee Kwak, Hyoung Yun Kim, Da Wun Jung, Yoon Ho Shin, Man Yong Han
Clin Exp Pediatr. 2008;51(8):842-847.   Published online August 15, 2008
Purpose : Measurement of forced expiratory volume in 1 second (FEV1) is usually difficult to obtain in children under six years of age because it requires active cooperation. This study evaluates the sensitivity of impulse oscillometry system (IOS) parameters for detecting airway obstruction in comparison with FEV1. Methods : We studied 174 children who performed the lung function and methacholine challenge...
The effect of education and training with balloons on pulmonary function test in children
Yong Hee Hong, Sun Mi Ha, You Hoon Jeon, Hyeon Jong Yang, Bok Yang Pyun
Clin Exp Pediatr. 2008;51(5):506-511.   Published online May 15, 2008
Purpose : The results of pulmonary function test (PFT) in children are variable according to the patient's cooperation and comprehensiveness. This study has intended to figure out the effectiveness of pre-education and training with balloons on PFT in children. Methods : One hundred six children mean aged 9.35?.92 years were tested. All participants performed PFT twice in 30 minutes intervals....
Relationship between exhaled nitric oxide and pulmonary function test in children with asthma
Han-Seok Ko, Sung-Hoon Chung, Yong-Sung Choi, Sun-Hee Choi, Yeong-Ho Rha
Clin Exp Pediatr. 2008;51(2):181-187.   Published online February 15, 2008
Purpose : Asthma is characterized by reversible airway obstruction and bronchial hyperresponsiveness result from airway inflammation. Fraction of nitric oxide in expired air (FeNO) has recently been investigated as a noninvasive measure of airway inflammation. FeNO has been reported to correlate with induced sputum eosinophilia and methacholine challenge test that it is represent severity of asthma. The purpose of this...
Case Report
A Case of Vocal Cord Dysfunction
Jeoung A Her, Hee Kyoung Choi, Chang Hee Son, Young Min Ahn
Clin Exp Pediatr. 2004;47(5):574-578.   Published online May 15, 2004
Vocal cord dysfunction is a recently described entity in which paradoxical adduction of the vocal cords produces airflow obstruction at the level of the larynx. Recurrent wheezing results, which may imitate asthma. Inspiratory closure of the cords can also cause stridor, commonly misdiagnosed as an upper airway obstruction of undefined cause. The acute presentation is often dramatic and has led...
Original Article
Evaluation of the Severity in Patients with Bronchial Asthma Using FEF25-75%
Sun Yoon Jung, Eun Sil Lee, Young Hwan Lee, Han Ku Moon
Clin Exp Pediatr. 2001;44(8):916-921.   Published online August 15, 2001
Purpose : Spirometry, because of its simplicity and reproducibility, has been used to evaluate pulmonary function in childhood asthma. We investigated whether FEF25-75% is the most sensitive parameter among other spirometric parameters in the diagnosis of pulmonary function and airway obstruction. Methods : This study included 32 children with asthma. We recorded values of spirometry(FVC, FEV1, PEFR, and FEF25-75%) before and...