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Predicting round window visibility by HRCT during cochlear implantation in children
Mohsen Rajati1, Mohamad Reza Afzalzadeh1, Navid Nourizadeh1
1Sinus and Surgical Endoscopic Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Iran.
Cochlear Implants International
|June 10, 2020
Summary
Radiologic measurements, including the round window niche (RWN) angle and modified facial recess distance (MFRD), reliably predict round window visibility during cochlear implantation surgery.
Area of Science:
- Radiology
- Otolaryngology
- Neurosurgery
Background:
- Cochlear implantation requires precise visualization of the round window (RW).
- Predicting RW visibility preoperatively can optimize surgical planning and outcomes.
- High-resolution computed tomography (HRCT) of the temporal bone is a key diagnostic tool.
Purpose of the Study:
- To radiologically evaluate round window (RW) visibility during cochlear implantation using HRCT.
- To assess the predictive value of novel radiologic measurements for RW visibility.
Main Methods:
- A cross-sectional descriptive analytic study was conducted.
- Two new measurements were evaluated on presurgical HRCT: the RWN angle and modified facial recess distance (MFRD).
- These measurements were compared with intraoperative RW visibility reported by surgeons.
Main Results:
- Significant differences in both MFRD (P < 0.01) and RWN angle (P < 0.04) were observed between groups with visible and nearly invisible RWs.
- These findings suggest a strong correlation between the radiologic measurements and actual surgical visibility.
Conclusions:
- The RWN angle and MFRD are reliable predictors of round window visibility.
- These measurements can aid in preoperative planning for cochlear implantation.
