Abstract
To evaluate the diagnostic performance of cytomegalovirus (CMV) polymerase chain reaction (PCR) on inner ear fluid collected during cochlear implantation and to assess its interest in current practice. This monocentric prospective study included consecutive children presenting with severe to profound sensorineural hearing loss (SNHL) who were candidates for unilateral and/or bilateral cochlear implantation. The etiology of the SNHL was determined before cochlear implantation when possible. During the surgery, drop-like samples of inner ear fluid and blood were collected. CMV PCR was then performed on both samples. Between January 2017 and September 2021, 113 children with severe to profound SNHL underwent cochlear implantation with inner ear fluid collection. Among these children, 77 of them presented with a known cause of SNHL (68%) and 36 of them had an unknown cause of SNHL at the time of surgery (32%). Sensitivity and specificity of the CMV PCR on inner ear fluid were 60% (95% CI: [49–71]) and 98% (95% CI: [96–100]), respectively. Positive and negative predictive values were 90% (95% CI: [83–97]) and 92% (95% CI: [86–98]), respectively. A sensitivity analysis according to age at cochlear implantation showed a decrease with age.
Conclusion: Sampling of inner ear fluid during cochlear implant surgery is an interesting, simple and safe way to diagnose CMV-related hearing loss, especially when the diagnosis of congenital infection can no longer be confirmed. However, the sensitivity decreases with age.
Trial registration: NCT04724265
What is Known: • Congenital cytomegalovirus infection is the leading infectious cause of neurological disabilities and sensorineural hearing loss in children. In the absence of systematic screening at birth, many cCMV infections go undetected and are often undiagnosed despite the development of sensorineural sequelae. • Nearly 40% of indications for cochlear implantation are of unknown etiology. | |
What is New: • Performing CMV PCR on inner ear fluid at the time of cochlear implantation is a safe way with high diagnostic performance (PPV = 90%, NPV = 92%) to detect a CMV-related hearing loss. • This sample may be interesting in cases of unknown cause of hearing loss in order to identify undiagnosed cCMV infections. |
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Abbreviations
- cCMV:
-
Congenital cytomegalovirus
- CMV:
-
Cytomegalovirus
- CT:
-
Computerized tomography
- cVEMP:
-
Cervical vestibular evoked myogenic potential
- MRI:
-
Magnetic resonance imaging
- PCR:
-
Polymerase chain reaction
- SNHL:
-
Sensorineural hearing loss
- vHIT:
-
Video head impulse test
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Dr. Chebib conceptualized and designed the study, drafted the initial manuscript, designed the data collection instruments, collected data, analyzed and interpreted data, carried out the initial analyses, and reviewed and revised the manuscript. Prof. Teissier and Dr. Vauloup-Fellous conceptualized and designed the study, collected data, analyzed and interpreted data, carried out the initial analyses, and reviewed and revised the manuscript. Prof. Van Den Abbeele, Dr. Benoit, Dr. Noël Petroff, and Dr. Maudoux collected data, analyzed and interpreted data, reviewed, and revised the manuscript. All authors approved the final manuscript as submitted and agreed to be accountable for all aspects of the work.
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Chebib, E., Vauloup-Fellous, C., Benoit, C. et al. Is CMV PCR of inner ear fluid during cochlear implantation a way to diagnose CMV-related hearing loss?. Eur J Pediatr 182, 375–383 (2023). https://doi.org/10.1007/s00431-022-04691-6
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DOI: https://doi.org/10.1007/s00431-022-04691-6