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Impulse oscillometry: a measure for airway obstruction.
Pediatr Pulmonol 2003; 35(3):214-9PP

Abstract

The impulse oscillometry system (IOS) was introduced as a new technique to assess airflow obstruction in patients who are not able to perform forced breathing maneuvers, e.g., subjects with cerebral palsy or severe mental retardation, and young children. This study evaluates the sensitivity and specificity of IOS parameters to quantify changes in airflow obstruction in comparison with forced expiratory volume in the first second (FEV(1)) and peak expiratory flow (PEF) measurements. Measurements of FEV(1), PEF, and resistance (R) and reactance (X) at frequencies of 5-35 Hz were performed in 19 children with asthma before, during, and after methacholine challenge and subsequent bronchodilatation. All parameters changed significantly during tests. Values of R5 and R10 correlated with FEV(1) (r = -0.71 and -0.73, respectively, P < 0.001), as did values of X5 and X10 (r = 0.52 and 0.57, respectively, P < 0.01). Changes in R preceded changes in PEF and FEV(1) during methacholine challenge. The area under the receiver operating characteristic (ROC) curve to predict a 15% fall in FEV(1) showed better sensitivity and specificity for R5 (area under the curve, 0.85) compared to PEF (0.79) or R10 (0.73). We conclude that IOS parameters can be easily used as an indirect measure of airflow obstruction. This might be helpful in patients who are not able to perform forced breathing maneuvers. In individual subjects, R values measured at 5 Hz showed to be superior to PEF measurements in the detection of a 15% fall in FEV(1).

Authors+Show Affiliations

Department of Paediatric Pulmonology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

12567390

Citation

Vink, Geraldine R., et al. "Impulse Oscillometry: a Measure for Airway Obstruction." Pediatric Pulmonology, vol. 35, no. 3, 2003, pp. 214-9.
Vink GR, Arets HG, van der Laag J, et al. Impulse oscillometry: a measure for airway obstruction. Pediatr Pulmonol. 2003;35(3):214-9.
Vink, G. R., Arets, H. G., van der Laag, J., & van der Ent, C. K. (2003). Impulse oscillometry: a measure for airway obstruction. Pediatric Pulmonology, 35(3), pp. 214-9.
Vink GR, et al. Impulse Oscillometry: a Measure for Airway Obstruction. Pediatr Pulmonol. 2003;35(3):214-9. PubMed PMID: 12567390.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Impulse oscillometry: a measure for airway obstruction. AU - Vink,Geraldine R, AU - Arets,Hubertus G M, AU - van der Laag,Johan, AU - van der Ent,Cornelis K, PY - 2003/2/5/pubmed PY - 2003/6/12/medline PY - 2003/2/5/entrez SP - 214 EP - 9 JF - Pediatric pulmonology JO - Pediatr. Pulmonol. VL - 35 IS - 3 N2 - The impulse oscillometry system (IOS) was introduced as a new technique to assess airflow obstruction in patients who are not able to perform forced breathing maneuvers, e.g., subjects with cerebral palsy or severe mental retardation, and young children. This study evaluates the sensitivity and specificity of IOS parameters to quantify changes in airflow obstruction in comparison with forced expiratory volume in the first second (FEV(1)) and peak expiratory flow (PEF) measurements. Measurements of FEV(1), PEF, and resistance (R) and reactance (X) at frequencies of 5-35 Hz were performed in 19 children with asthma before, during, and after methacholine challenge and subsequent bronchodilatation. All parameters changed significantly during tests. Values of R5 and R10 correlated with FEV(1) (r = -0.71 and -0.73, respectively, P < 0.001), as did values of X5 and X10 (r = 0.52 and 0.57, respectively, P < 0.01). Changes in R preceded changes in PEF and FEV(1) during methacholine challenge. The area under the receiver operating characteristic (ROC) curve to predict a 15% fall in FEV(1) showed better sensitivity and specificity for R5 (area under the curve, 0.85) compared to PEF (0.79) or R10 (0.73). We conclude that IOS parameters can be easily used as an indirect measure of airflow obstruction. This might be helpful in patients who are not able to perform forced breathing maneuvers. In individual subjects, R values measured at 5 Hz showed to be superior to PEF measurements in the detection of a 15% fall in FEV(1). SN - 8755-6863 UR - https://www.unboundmedicine.com/medline/citation/12567390/Impulse_oscillometry:_a_measure_for_airway_obstruction_ L2 - https://doi.org/10.1002/ppul.10235 DB - PRIME DP - Unbound Medicine ER -