Effect of Respiration Phases on the Morphology of the Laryngopharyngeal Cavity : an Investigation Using 320-Row Area Detector ComputedTomography

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  • ASAMI Sae
    Department of Anatomy and Physiology,Faculty of Medicine,Saga University
  • INAMOTO Yoko
    Faculty of Rehabilitation,School of Health Sciences, Fujita Health University
  • YOSHIZUKA Hisayoshi
    Department of Physical Therapy,Fukuoka International University of Health and Welfare
  • SAITOH Eiichi
    Department of Rehabilitation Medicine I,School of Medicine, Fujita Health University
  • SHIBATA Seiko
    Department of Rehabilitation Medicine I,School of Medicine, Fujita Health University
  • AIHARA Keiko
    Faculty of Rehabilitation,School of Health Sciences, Fujita Health University
  • KAGAYA Hitoshi
    Department of Rehabilitation Medicine I,School of Medicine, Fujita Health
  • KOBAYASHI Masanao
    Faculty of Radiological Technology,School of Health Sciences, Fujita Health University
  • ASAMI Toyoko
    Department of Rehabilitation Medicine, Saga University Hospital
  • KURAOKA Akio
    Department of Anatomy and Physiology,Faculty of Medicine,Saga University
  • YAMASHITA Yoshio
    Department of Oral and Maxillofacial Surgery,Saga University

Bibliographic Information

Other Title
  • 咽頭喉頭腔の形態に対する呼吸時相の影響について : 320列面検出器型CTを用いた検討

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Description

Purpose: The laryngopharyngeal cavity (LC) changes its shape dynamically with biological activities such as phonation, deglutition, and respiration. This study aimed to elucidate whether the laryngopharyngeal morphology changed according to the respiration phases, using data from 320-row area detector computed tomography (320-ADCT). / Materials andmethods: The subjects were five healthy adult females. They underwent four single-phase respiratory synchronous volume scans with 320-ADCT during four points in the respiratory cycle: deep inspiration, deep expiration, tidal inspiration, and tidal expiration. Threedimensional-CT images were reconstructed and used to measure the volume, length, cross-sectional area, and anteroposterior and lateral diameters of the LC. Coordinate measurements were also performed on anatomical landmarks around the LC. The data were submitted for statistical analyses. / Results: No remarkable changes were observed in the parameters during tidal respiration. The volume of the LC increased during the deep inspiration phase, with an expansion of the cross-sectional area and elongation of the anteroposterior diameter at the epiglottic vallecular level. Simultaneously, coordinate analysis revealed that the hyoid bone and tongue base moved anteriorly. / Conclusions: In this study, effect of respiration on the morphology of the LC were analyzed using 320-ADCT. The results suggested that during deep respiration, anterior deviation of the hyoid bone and tongue through the action of airway-related muscles generated dynamic movement of the pharyngeal wall, which consequently expanded the LC. It is also recommended that the tidal respiration phase is used to acquire standard values for laryngopharyngeal morphology since the LC showed stable configuration in this phase.

Journal

  • 福岡醫學雜誌

    福岡醫學雜誌 112 (3), 187-198, 2021-09-25

    Fukuoka Medical Association

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