Evaluation of laryngeal and tracheal Stenosis using Flow-Volume Loops

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  • Flow-Volume曲線法による喉頭気管狭窄の呼吸機能の測定
  • Flow Volume キョクセンホウ ニヨル コウトウ キカン キョウサク

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Abstract

1. Flow-Volume loops of lesions in the trachea and larynx showed decrease of peak expira tory flow (plateau formation). In tracheal stenosis, F-V loops showed much more decrease than in laryngeal stenosis.<BR>2. The values of forced expiratory volume in one second were relatively well preserved both in laryngeal and tracheal obstruction.<BR>3. In bilateral immobilization of the vocal cords, cases with the value of peak expiratory flow less than 50% of normal complained marked dyspnea subjectively. The value of 50% was thought to be one of the indicators for surgical treatments.<BR>4. Flow-Volume loop method was simple and effective for evaluating the site and nature of major air way stenosis and for evaluating surgical results.

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