title: Measurements of chest wall volume variation during tidal breathing in the supine and lateral positions in healthy subjects.
abstract: OBJECTIVE
  To study the feasibility and the laterality of measurements of chest wall volume variation during tidal breathing in the lateral position in healthy subjects.
  
  
  METHODS
  Eighteen normal subjects were studied. Chest wall volume changes were measured by optoelectronic plethysmography in the supine and right and left lateral positions during quiet breathing. The accuracy of measuring lung volume was also examined using hot wire spirometry in 10 of the subjects.
  
  
  RESULTS
  The measurement errors between lung volume changes and chest wall volume changes were not significantly different in all positions. There was no significant difference between right and left compartmental volume changes in the supine position. However, chest wall volume changes were lower on the dependent side in the lateral position than on the non-dependent side because of the decrease in abdominal rib cage and abdomen volume changes.
  
  
  CONCLUSIONS
  Chest wall volume measurements during quiet breathing in the lateral position have high measuring accuracy and show laterality.
authors.affiliation: Department of Rehabilitation, Hyogo College of Medicine Sasayama Medical Center, Kurooka 5, Sasayama, Hyogo, Japan. Electronic address: masafumi.nozoe@gmail.com.
authors.forename: Masafumi
authors.initials: M
authors.lastname: Nozoe
authors.affiliation: Department of Physical Therapy, Faculty of Nursing and Rehabilitation, Konan Women's University, Japan.
authors.forename: Kyoshi
authors.initials: K
authors.lastname: Mase
authors.affiliation: Department of Physical Therapy, Faculty of Nursing and Rehabilitation, Konan Women's University, Japan.
authors.forename: Sachie
authors.initials: S
authors.lastname: Takashima
authors.affiliation: Department of Rehabilitation, Hyogo College of Medicine Sasayama Medical Center, Kurooka 5, Sasayama, Hyogo, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Matsushita
authors.affiliation: Department of Rehabilitation, Hyogo College of Medicine Sasayama Medical Center, Kurooka 5, Sasayama, Hyogo, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Kouyama
authors.affiliation: Department of Rehabilitation, Hyogo College of Medicine Sasayama Medical Center, Kurooka 5, Sasayama, Hyogo, Japan.
authors.forename: Hiromi
authors.initials: H
authors.lastname: Hashizume
authors.affiliation: Department of Rehabilitation, Konan Kakogawa Hospital, Japan.
authors.forename: Yurina
authors.initials: Y
authors.lastname: Kawasaki
authors.affiliation: Department of General Medicine and Community Health Science, Hyogo College of Medicine, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Uchiyama
authors.affiliation: Department of Functional Regenerative Science, Hyogo College of Medicine, Japan.
authors.forename: Noriyasu
authors.initials: N
authors.lastname: Yamamoto
authors.affiliation: Department of General Medicine and Community Health Science, Hyogo College of Medicine, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Fukuda
authors.affiliation: Department of Rehabilitation Medicine, Hyogo College of Medicine, Japan.
authors.forename: Kazuhisa
authors.initials: K
authors.lastname: Domen
mesh_terms: D000005:Abdomen / Q000502:physiology; D000328:Adult; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D008168:Lung / Q000502:physiology; D008297:Male; D055096:Optical Devices; D009929:Organ Size; D010991:Plethysmography; D011187:Posture; D012119:Respiration; D013147:Spirometry; D016683:Supine Position; D035441:Thoracic Wall / Q000502:physiology*; D013909:Thorax / Q000502:physiology; D055815:Young Adult
keywords: Chest wall volume; Lateral position; Optoelectronic plethysmography