title: [Effects of measurement position on the forced oscillation technique values].
abstract: BACKGROUND
  Cheek support and subject's arm position can influence on lung function values measured with forced oscillation technique. We examined resistance and reactance by different methods using a new forced oscillation technique machine called MostGraph (Chest Co. Ltd., Tokyo, Japan).
  
  
  METHODS
  We evaluated nineteen adults. Four methods are measured. 1: the subjects support their cheeks with their hands. 2: the tester support the subject's cheeks with their hands. 3: the subjects stiffen their cheeks without any cheek support. 4: subject relax their cheeks without any cheek support. R5, R20, R5-R20, X5, Fres and ALX were compared between four methods.
  
  
  RESULTS
  In resistance values, R20 was the lowest in the fourth method, and it was significantly different from the first (p<0.01) and the second (p<0.01) method. R5-R20 was the lowest in the second method, and it was significantly different from the third (p<0.01) and forth (p<0.01) methods. In reactance values, X5 was the highest in the second method. All ractance values in the second method were significantly different from the first and the fourth method.
  
  
  CONCLUSIONS
  Measurement values using Mostgraph was influenced by methods of supporting cheeks and subject's arm position. Measurement method should be unify and the first method is ideal and practical.
authors.affiliation: Department of Pediatrics, Showa University.
authors.forename: Toshinori
authors.initials: T
authors.lastname: Nakamura
authors.affiliation: Department of Pediatrics, Showa University.
authors.forename: Takanori
authors.initials: T
authors.lastname: Imai
authors.affiliation: Department of Pediatrics, Showa University.
authors.forename: Ayako
authors.initials: A
authors.lastname: Yagawa
authors.affiliation: Department of Pediatrics, Showa University.
authors.forename: Tokuo
authors.initials: T
authors.lastname: Miyazawa
authors.affiliation: Department of Pediatrics, Showa University.
authors.forename: Naho
authors.initials: N
authors.lastname: Hojo
authors.affiliation: Department of Pediatrics, Showa University.
authors.forename: Ryoko
authors.initials: R
authors.lastname: Ishikawa
authors.affiliation: Department of Pediatrics, Showa University.
authors.forename: Taro
authors.initials: T
authors.lastname: Kamiya
authors.affiliation: Department of Pediatrics, Showa University.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Itahashi
mesh_terms: D000328:Adult; D000403:Airway Resistance; D001132:Arm / Q000502:physiology*; D002610:Cheek / Q000502:physiology; D005260:Female; D006225:Hand / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D011187:Posture / Q000502:physiology*; D012129:Respiratory Function Tests / Q000379:methods*; D055815:Young Adult