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Clinical Applications of Round Window Imaging Anatomy in Cochlear Implant Surgery

15. december 2014 opdateret af: MICHAL.LUNTZ, Bnai Zion Medical Center

Clinical Applications of Round Window High Resolution Computerised Tomography Anatomy in Cochlear Implant Surgery

The purpose of this study is to measure the size of the round window niche and its relation to the mastoid segment of the facial nerve and the mastoid cortex, using high resolution computerized tomography of the temporal bone, in order to assess preoperatively what is the extent of obstruction of the round window membrane and whether there is a surgical possibility of round window approach in the insertion of electrode array into the cochlea

Studieoversigt

Status

Ukendt

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

The assessment of the anatomy of the round window will be executed using the stractured measuring software used for imaging of the Bnai Zion medical center (CARESTREAM PACS Ver. 11.0, CARSTREAM HEALTH INC.) in IAC window (centered at 700 with a total width of 4000) in the available zoom by the software (usually 400-800%).

Measuring the length (mm) and angle will be executed by the software's structured rulers.

Measuring protocol:

  1. Measured scans: one taken in an orbito-meatal plane
  2. Chosen slices: where both the round window niche and the external ear canal are seen on the same slice

  3. Distances measured:

    1. Distance 1: between the anterior edge of the round window niche and the cortex of the mastoid, with a minimal distance of 0.5mm to the posterior wall of the external ear canal
    2. Distance 2: between the posterior edge of the round window niche and the cortex of the mastoid, with a minimal distance of 0.3mm to the anterior edge of the mastoid segment of the facial nerve.
    3. Distance 3: the size of the round window niche (from its anterior to posterior edges)
    4. Distance 4: between the anterior (most medial) edge of the round window membrane to a point at least 0.3mm anterior to the mastoid segment of the facial nerve.
    5. Distance 5: between the posterior (most lateral) edge of the round window membrane to a point at least 0.3mm anterior to the mastoid segment of the facial nerve
    6. Distance 6: size of round window membrane (anterior/medial to posterior/lateral)
    7. Distance 7: between the lateral edges of distance 1 and 2 marking the cortical size of the "working channel" created between the lines (from the cortex to the round window).

  4. Angles measured:

    1. Between distance 1 and 7 - marking the angle of the "working channel" relatively to the cortex
    2. Between distance 1, passing in the middle of distance 3 to the middle of distance 6 - marking the angle of possible insertion from the working channel into the cochlea

Undersøgelsestype

Observationel

Tilmelding (Faktiske)

100

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Israel
      • Haifa, Israel
        • Bnai Zion Medical Center

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

20 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

100 patient who were suffering from profound sensory neural hearing loss and underwent a high resolution computerized tomography of the temporal bone prior to cochlear implantation surgery

Beskrivelse

Inclusion Criteria:

  • age 20 years old or older
  • high resolution computerized tomography of the temporal bone (slices ≤1mm) before the surgery
  • on the measured slices both the round window niche and the posterior wall of the external ear canal are seen

Exclusion Criteria:

  • inner, middle or external ear malformation
  • temporal bone malformation
  • status post cochlear implant
  • status post temporal bone trauma
  • slices were the round window niche and the posterior wall of the external ear canal are not seen on the same slice

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Observationsmodeller: Kun etui
  • Tidsperspektiver: Tilbagevirkende kraft

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
CT of the temporal bone
Andet: measurment

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Tidsramme
the size of round window niche and its relation to the cochlea
Tidsramme: january-june 2014 (six months)
january-june 2014 (six months)

Sekundære resultatmål

Resultatmål
Tidsramme
sizes of working channel from the mastoid cortex into the round window membrane and its relation to the mastoid sagment of the facial nerve
Tidsramme: january-june 2014 (six months)
january-june 2014 (six months)

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Bnai Zion Medical Center

Efterforskere

  • Ledende efterforsker: Michal Luntz, Prof., chair of otorhinolaryngology department at the Bnai Zion medical center

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. januar 2014

Primær færdiggørelse (Forventet)

1. juni 2015

Datoer for studieregistrering

Først indsendt

20. marts 2014

Først indsendt, der opfyldte QC-kriterier

20. marts 2014

Først opslået (Skøn)

21. marts 2014

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

16. december 2014

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

15. december 2014

Sidst verificeret

1. december 2014

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 0140-13-BNZ (Andet bevillings-/finansieringsnummer: TRADIS GAT LTD. ISRAEL)

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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