鼻呼吸時クロージングボリューム

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タイトル別名
  • Study on the Relationship between Nasal Breathing and Closing Volume
  • ビコキュウジ クロージングボリューム

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説明

This study was done in order to determine how nasal obstruction, which can be regarded as a kind of upper airway stenosis, affects closing volume (CV).<br>Closing volume, measured with oral and nasal respiration, was compared in thirty-two adult patients. In addition, the percent vital capacity (% VC), percent forced expiratory volume (% FEV1.0), and flow-volume curves were compared.<br>The results were as follows:<br>1) When measured by means of oral and nasal respiration there was no significant difference in CV between the normal subjects group and nasal obstruction group.<br>2) When measured by means of nasal respiratory resistance (Rr), peak flow (PF), maximal expiratory flow at 75 percent (V75) and 50 percent (V50) showed a significant difference between the normal subjects group and nasal obstruction group. No significant was difference found, however, at 25 percent (V25).

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