• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Laser labyrinthectomy

Research Project

Project/Area Number 02404068
Research Category

Grant-in-Aid for General Scientific Research (A)

Allocation TypeSingle-year Grants
Research Field Otorhinolaryngology
Research InstitutionUniversity of Tokyo

Principal Investigator

NOMURA Yasuya  Dept. of Otolaryngology University of Tokyo Professor, 医学部(病), 教授 (30009948)

Co-Investigator(Kenkyū-buntansha) SUGASAWA Masashi  Dept. of Otolaryngology, Universityof Tokyo, 医学部(病), 助手 (00179110)
HARA Makoto  Dept. of Otolaryngology, University of Tokyo, 医学部(病), 助手 (10173072)
OKUNO Taeko  Dept. of Otolaryngology, University of Tokyo, 医学部(病), 講師 (90133082)
山岨 達也  東京大学, 医学部(病), 助手 (30220362)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥22,900,000 (Direct Cost: ¥22,900,000)
Fiscal Year 1991: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1990: ¥21,900,000 (Direct Cost: ¥21,900,000)
KeywordsArgon laser / labyrinthectomy / inner ear diseases / human / 内耳手術 / 耳石器 / 眼振
Research Abstract

Using guinea pigs, effects of argon laser irradiation to the utricle was confirmed. After stapedectomy, the macula utricli was irradiated by Argon laser beam (1.5w x 0.5s) from behind. A small depression was observed on the surface of the macula utricli immediately after surgery. Transmission electron microscopic findings revealed that the sensory cells and supporting cells were detached from the basement membrane. Size of the depression was twice of that of the spot size. Changes of the hair cells and supporting cells spread towards periphery. These cells disappeared in 10 weeks and a layer of flat cells replaced them. Immediately after irradiation, migrated macrophages trapped and digested otoconia particles. Macrophages were found scattered in the endolymphatic space. They were also observed in the endolymphatic sac and number of them was maximum on the 4th day postoperatively. However, otoconia particles were not included in the macrophages. Small vacuoles were observed within epitheliijm of the intermediate portion of thd endolymphatic sac. The otoconia completely disappeared from the inner ear in 2 weeks.
In humans, the otolithic membrane can be seen in the vestibule after stapedectomy. Therefore, irradiation of maculae utricli and sacculi was quite possible.
Destruction of the crista ampullaris of the anterior and lateral semicircular canals are almost impossible from the middle ear side without making fistula in the labyrinthin wall. However, we can destroy the utriculo-ampullary nerve through the stapedectomized oval window using argon laser.
Singular neurectomy using Argon laser is possible in humans.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Nomura Y,Okuno T,Young YH,Hara M: "Laser labyrinthectomy in humans" Acta Otolaryngol Suppl. 111. 319-326 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Okuno T,Nomura Y,Young YH,: "Ablation of otolithic organs with argon laser" Acta Otolaryngol Suppl. 481. 607-609 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nomura Y,Okuno T,Young YH,Hara M: "“Floating"labyrinth" Acta Otolaryngol. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nomura Y, Okuno T, Young Y-H, Hara M: "Laser labyrinthectomy in humans" Acta Otolaryngol. Suppl 111. 319-326 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Okuno T, Nomura Y, Young Y-H: "Ablation of otolithic organs with argon laser." Acta Otolaryngol. Suppl 481. 607-609 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Young Y-H, Nomura Y, Okuno T, Hara M: "Clip electrode method for recording eye movements in experimental animals." Eur Arch Otorhinolaryngol. 248. 331-334 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nomura Y, Okuno T, Young Y-H, Hara M: ""Floating" labyrinth." Acta Otolaryngol.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nomura Y,Okuno T,Young YH,Hara M: "Laser labyrinthectomy in humans" Acta Otolaryngol Suppl. 111. 319-326 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Okuno T,Nomura Y,Young YH,: "Ablation of otolithic organs with argon laser" Acta Otolaryngol Suppl. 481. 607-609 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Nomura Y,Okuno T,Young YH,Hara M: "“Floating" labyrinth" Acta Otolaryngol. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Okuno T,Nomura Y,Young YーH,Hara M: "Argon laser irradiation to the otolithic organ" Otolaryng Head Neck Surg. 103. 926-930 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Nomura Y,Okuno T,Young YーH,Hara M: "Laser labyrinthectomy" Acta Otolaryngol. (1991)

    • Related Report
      1990 Annual Research Report

URL: 

Published: 1990-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi