Radiological measurement of cochlear dimensions in cochlear hypoplasia and its effect on cochlear implant selection.
J Laryngol Otol
; 135(6): 501-507, 2021 Jun.
Article
in English
| MEDLINE | ID: covidwho-1313523
ABSTRACT
OBJECTIVE:
To determine the effect of cochlear dimensions on cochlear implant selection in cochlear hypoplasia patients.METHODS:
Temporal bone computed tomography images of 36 patients diagnosed with cochlear hypoplasia between 2010 and 2016 were retrospectively reviewed and compared with those of 40 controls without sensorineural hearing loss.RESULTS:
Basal turn length and mid-modiolar height were significantly lower in the cochlear hypoplasia patients with subtypes I, II and III than in the control group (p < 0.001). Mid-scalar length was significantly shorter in subtype I-III patients as compared with the control group (p < 0.001). In addition, cochlear canal length (measured along the lateral wall) was significantly shorter in subtype I-IV patients than in the control group (subtypes I-III, p < 0.001; subtype IV, p = 0.002).CONCLUSION:
Cochlear hypoplasia should be considered if basal turn length is less than 7.5 mm and mid-modiolar height is less than 3.42 mm. The cochlear implant should be selected according to cochlear hypoplasia subgroup. It is critically important to differentiate subtype II from incomplete partition type I and subtype III from a normal cochlea, to ensure the most appropriate implant electrode selection so as to optimise cochlear implantation outcomes.Keywords
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Tomography, X-Ray Computed
/
Cochlear Implants
/
Cochlea
/
Hearing Loss, Sensorineural
Type of study:
Experimental Studies
/
Observational study
Limits:
Adolescent
/
Adult
/
Child
/
Child, preschool
/
Female
/
Humans
/
Infant
/
Male
/
Young adult
Language:
English
Journal:
J Laryngol Otol
Journal subject:
Otolaryngology
Year:
2021
Document Type:
Article
Affiliation country:
S0022215121000979
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