Cochlear Implantation: Predicting Round Window Niche Visibility Using One Measurement in High-Resolution Temporal Bone Computed Tomography
BACKGROUND: To evaluate the accuracy of a single measurement in temporal bone computed tomography in predicting the round window niche (RWN) visibility during cochlear implantation. METHODS: A prospective study was conducted on 148 patients (165 ears) who had a cochlear implant (CI) from January...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AVES
2024-03-01
|
| Series: | Journal of International Advanced Otology |
| Online Access: | https://www.advancedotology.org/en/cochlear-implantation-predicting-round-window-niche-visibility-u-one-measurement-in-high-resolution-temporal-bone-computed-tomography-131916 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832543913926197248 |
|---|---|
| author | Laila Telmesani Mona Al-Ramah Yassin Abdelsamad Lena Telmesani |
| author_facet | Laila Telmesani Mona Al-Ramah Yassin Abdelsamad Lena Telmesani |
| author_sort | Laila Telmesani |
| collection | DOAJ |
| description | BACKGROUND: To evaluate the accuracy of a single measurement in temporal bone computed tomography in predicting the round window niche (RWN) visibility during cochlear implantation.
METHODS: A prospective study was conducted on 148 patients (165 ears) who had a cochlear implant (CI) from January 2010 to December 2018 at a tertiary CI center. The measurement was done for the angle of the basal turn of the cochlea (ABTC), which we defined as the angle formed by the cochlear basal turn and the cranium mid-sagittal plane, by 2 readers blindly from the axial images of computed tomography. The RWN visibility was classified according to the observation during surgery (through posterior tympanotomy) into full visibility, partial visibility, and invisibility. The measured angle was then correlated to the intra-operative visibility of the RWN.
RESULTS: The average ABTC was 57.48° ± 4.05° (range: 45.0-68.0), and the RWN was found to be fully visible in 85%, partially visible in 11%, and invisible in 4% of the studied ears. The receiver operating characteristic analysis revealed a significant discriminating ability in predicting RWN visibility (P <.001) at a threshold ABTC angle of 58.5°. The mean ABTC was 56.71° ± 3.74°, 61.00°, and 63.86° ± 2.67° for fully visible, partially visible, and invisible RWN, respectively. A statistical significant difference was found (P = .0002) when comparing the ABTC in patients with partially visible/invisible RWN (61.80° ± 2.87°) with the fully visible RWN (56.71° ± 3.74°).
CONCLUSION: Round window niche visibility could be predicted by measuring the ABTC in relation to the cranium’s mid-sagittal plane in CT preoperatively. An ABTC bigger than 58.5° could be an indication of poorly visible RWN. |
| format | Article |
| id | doaj-art-4afcb9b5d98f4489b84f1c3b4d9b8db7 |
| institution | Kabale University |
| issn | 2148-3817 |
| language | English |
| publishDate | 2024-03-01 |
| publisher | AVES |
| record_format | Article |
| series | Journal of International Advanced Otology |
| spelling | doaj-art-4afcb9b5d98f4489b84f1c3b4d9b8db72025-02-03T11:20:33ZengAVESJournal of International Advanced Otology2148-38172024-03-012029410010.5152/iao.2024.231199Cochlear Implantation: Predicting Round Window Niche Visibility Using One Measurement in High-Resolution Temporal Bone Computed TomographyLaila Telmesani0Mona Al-Ramah1Yassin Abdelsamad2Lena Telmesani3Cochlear Implant Unit, King Fahad University Hospital, Al-Khobar, Saudi Arabia ; Department of ENT, Imam Abdulrahman bin Faisal University, Dammam, Saudi ArabiaCochlear Implant Unit, King Fahad University Hospital, Al-Khobar, Saudi ArabiaDepartment of Research, MED-EL GmbH, Riyadh, Saudi ArabiaDepartment of ENT, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia ; Department of ENT, King Fahad University Hospital, Al-Khobar, Saudi ArabiaBACKGROUND: To evaluate the accuracy of a single measurement in temporal bone computed tomography in predicting the round window niche (RWN) visibility during cochlear implantation. METHODS: A prospective study was conducted on 148 patients (165 ears) who had a cochlear implant (CI) from January 2010 to December 2018 at a tertiary CI center. The measurement was done for the angle of the basal turn of the cochlea (ABTC), which we defined as the angle formed by the cochlear basal turn and the cranium mid-sagittal plane, by 2 readers blindly from the axial images of computed tomography. The RWN visibility was classified according to the observation during surgery (through posterior tympanotomy) into full visibility, partial visibility, and invisibility. The measured angle was then correlated to the intra-operative visibility of the RWN. RESULTS: The average ABTC was 57.48° ± 4.05° (range: 45.0-68.0), and the RWN was found to be fully visible in 85%, partially visible in 11%, and invisible in 4% of the studied ears. The receiver operating characteristic analysis revealed a significant discriminating ability in predicting RWN visibility (P <.001) at a threshold ABTC angle of 58.5°. The mean ABTC was 56.71° ± 3.74°, 61.00°, and 63.86° ± 2.67° for fully visible, partially visible, and invisible RWN, respectively. A statistical significant difference was found (P = .0002) when comparing the ABTC in patients with partially visible/invisible RWN (61.80° ± 2.87°) with the fully visible RWN (56.71° ± 3.74°). CONCLUSION: Round window niche visibility could be predicted by measuring the ABTC in relation to the cranium’s mid-sagittal plane in CT preoperatively. An ABTC bigger than 58.5° could be an indication of poorly visible RWN.https://www.advancedotology.org/en/cochlear-implantation-predicting-round-window-niche-visibility-u-one-measurement-in-high-resolution-temporal-bone-computed-tomography-131916 |
| spellingShingle | Laila Telmesani Mona Al-Ramah Yassin Abdelsamad Lena Telmesani Cochlear Implantation: Predicting Round Window Niche Visibility Using One Measurement in High-Resolution Temporal Bone Computed Tomography Journal of International Advanced Otology |
| title | Cochlear Implantation: Predicting Round Window Niche Visibility Using One Measurement in High-Resolution Temporal Bone Computed Tomography |
| title_full | Cochlear Implantation: Predicting Round Window Niche Visibility Using One Measurement in High-Resolution Temporal Bone Computed Tomography |
| title_fullStr | Cochlear Implantation: Predicting Round Window Niche Visibility Using One Measurement in High-Resolution Temporal Bone Computed Tomography |
| title_full_unstemmed | Cochlear Implantation: Predicting Round Window Niche Visibility Using One Measurement in High-Resolution Temporal Bone Computed Tomography |
| title_short | Cochlear Implantation: Predicting Round Window Niche Visibility Using One Measurement in High-Resolution Temporal Bone Computed Tomography |
| title_sort | cochlear implantation predicting round window niche visibility using one measurement in high resolution temporal bone computed tomography |
| url | https://www.advancedotology.org/en/cochlear-implantation-predicting-round-window-niche-visibility-u-one-measurement-in-high-resolution-temporal-bone-computed-tomography-131916 |
| work_keys_str_mv | AT lailatelmesani cochlearimplantationpredictingroundwindownichevisibilityusingonemeasurementinhighresolutiontemporalbonecomputedtomography AT monaalramah cochlearimplantationpredictingroundwindownichevisibilityusingonemeasurementinhighresolutiontemporalbonecomputedtomography AT yassinabdelsamad cochlearimplantationpredictingroundwindownichevisibilityusingonemeasurementinhighresolutiontemporalbonecomputedtomography AT lenatelmesani cochlearimplantationpredictingroundwindownichevisibilityusingonemeasurementinhighresolutiontemporalbonecomputedtomography |