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Japanese

Effects of age and body position on Ar closing volume Osami Nishida 1 , Norio Sewake 1 , Takuzo Shigenobu 1 , Mitsuhiro Takano 1 , Takehiko Hiramoto 1 , Yukio Nishirnoto 1 , Akira Fujisawa 2 , Takao Hanasaka 2 1Dept. of Int. Med. Hiroshima Univ. School of Med. 2Vacuum Equipment Plant, Precision Machinery Division, Shimadzu Seisakusho LTD. pp.349-352
Published Date 1975/4/15
DOI https://doi.org/10.11477/mf.1404202753
  • Abstract
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Ar closing volumes in seated and supine positions were determined in healthy adults, aged 23~70. Closing volume was revealed to be increased with age in both positions, whereas the difference between expiratory reserve volume and closing volume was decreased with age. The "critical age", at which the closing capacity exceeds the functional residual capacity, was shown to be 74 years in seated position, and 45 years in supine position.


Copyright © 1975, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1200 印刷版ISSN 0452-3458 医学書院

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