Curriculum Vitaes

fujii naoko

  (藤井 直子)

Profile Information

Affiliation
School of Medicine Faculty of Medicine, Fujita Health University
Degree
博士(医学)

J-GLOBAL ID
201501001023338826
researchmap Member ID
7000013243

Misc.

 11
  • Satoshi Yoshioka, Kensei Naito, Naoko Fujii, Kazuhiro Katada
    OTOLOGY & NEUROTOLOGY, 34(5) 877-883, Jul, 2013  
    Objective: The Eustachian tube is difficult to evaluate because it is located deep in the head. However, the introduction of 320-row area detector CT has made it possible to evaluate this region. In the present study, movement of the Eustachian tube during sniffing was visualized using area detector CT in patients with patulous Eustachian tube. Methods: Four patients with patulous Eustachian tube were examined using an area detector CT scanner (Aquilion ONE, Toshiba). This scanner supports 320-row scanning of 0.5-mm slices at up to 0.275 s/rot., eliminating temporal mismatch between various parts of the acquired images and permitting 4-dimensional CT (4DCT) images to be obtained by continuous scanning. The scan conditions were 120 kV, 120 to 150 mA, 0.5 mm x 280 to 320 slices, and 0.35 seconds per rotation x 9 rotations. The patient was seated on a reclining chair tilted to 45 degrees and was instructed to sniff during continuous scanning. Images of the Eustachian tube were generated at 0.1-second intervals. Conclusion: At the start of sniffing, the cartilaginous portion of the Eustachian tube closed from the isthmus toward the pharynx. The starting point differed from patient to patient. In patients with patulous Eustachian tube, sniffing (an unconscious habit that helps to relieve ear discomfort) is an important factor in the development of middle ear diseases. We have successfully depicted this event for the first time, demonstrating various patterns of Eustachian tube closure during sniffing in patients with patulous Eustachian tube. This method may be useful for evaluating Eustachian tube dysfunction.
  • Enri Nakayama, Hitoshi Kagaya, Eiichi Saitoh, Yoko Inamoto, Shuji Hashimoto, Naoko Fujii, Kazuhiro Katada, Daisuke Kanamori, Haruka Tohara, Koichiro Ueda
    DYSPHAGIA, 28(2) 199-204, Jun, 2013  
    In patients with unilateral pharyngeal paresis and dysphagia, the head is rotated to the paretic side to prevent food flow to the rotated side during swallowing. Only a few studies to date have reported on pyriform sinus morphology upon head rotation. The purpose of this study was to measure the volume, depth, and cross-sectional area of the pyriform sinus during head rotation using 320-row area detector computed tomography. We imaged the neck during head rotation at 0A degrees and at 30A degrees, 45A degrees, and 60A degrees to the left or right in nine healthy young adults and determined the volume, depth, and cross-sectional area of the pyriform sinus in each position. On the rotated side, volume and cross-sectional area were significantly decreased at 60A degrees. In contrast, volume, cross-sectional area, and depth were all significantly increased on the opposite side at 60A degrees. These results suggest that head rotation at 60A degrees significantly increases the volume, cross-sectional area, and depth of the opposite side, and significantly decreases the volume and depth of the rotated side of the pyriform sinus.
  • Yoko Inamoto, Eiichi Saitoh, Sumiko Okada, Hitoshi Kagaya, Seiko Shibata, Kikuo Ota, Mikoto Baba, Naoko Fujii, Kazuhiro Katada, Pattra Wattanapan, Jeffrey B. Palmer
    DYSPHAGIA, 28(1) 33-42, Mar, 2013  
    The present study examined the effect of bolus viscosity on the onset of laryngeal closure (relative to hyoid elevation), the duration of laryngeal closure, and other key events of swallowing in ten healthy volunteers. All volunteers underwent 320-row area detector computed tomography swallow studies while swallowing 10 ml of honey-thick barium (5 % v/w) and thin barium (5 % v/w) in a 45A degrees reclining position. Three-dimensional images of both consistencies were created in 29 phases at an interval of 0.10 s (100 ms) over a 2.90-s duration. The timing of the motions of the hyoid bone, soft palate, and epiglottis; the opening and closing of the laryngeal vestibule, true vocal cords (TVC), and pharyngoesophageal segment; and the bolus movement were measured and compared between the two consistencies. The result showed differing patterns of bolus movement for thin and thick liquids. With thin liquids, the bolus reached the hypopharynx earlier and stayed in the hypopharynx longer than with thick liquids. Among events of laryngeal closure, only the timing of TVC closure differed significantly between the two consistencies. With thin liquids, TVC closure started earlier and lasted longer than with thick liquids. This TVC movement could reflect a response to the faster flow of thin liquids. The results suggest that bolus viscosity alters the temporal characteristics of swallowing, especially closure of the TVC.
  • 山本高久, 藤井直子, 藤澤利行, 田中誠一, 岩田昇, 鈴木賢二
    耳鼻咽喉科展望, 56(補3) 169-201, 2013  
  • 吉岡哲志, 犬塚恵美子, 内藤健晴, 藤井直子, 片田和広, 鈴木昇一, 小林正尚
    Otol Jpn, 22(5) 801-813, 2012  

Books and Other Publications

 2

Presentations

 35