Can changes in parentally measured acoustic reflectometry levels predict the middle ear status?
Nora Erkkola-Anttinen1, Miia K Laine2, Paula A Tähtinen3
1Department of Paediatrics and Adolescent Medicine, Turku University Hospital, Turku, Finland; Department of Paediatrics and Adolescent Medicine, University of Turku, Turku, Finland; City of Turku Welfare Division, Primary Healthcare Services, Turku, Finland.
Summary
Increasing spectral gradient acoustic reflectometry (SG-AR) levels may not reliably detect acute otitis media (AOM) in children. However, stable SG-AR readings suggest a healthy middle ear, indicating AOM is unlikely.
Area of Science:
- Pediatric Otolaryngology
- Diagnostic Imaging Technology
- Middle Ear Disease Research
Background:
- Spectral gradient acoustic reflectometry (SG-AR) is a potential tool for diagnosing middle ear conditions.
- Acute otitis media (AOM) is common in young children and requires accurate detection.
Purpose of the Study:
- To evaluate if increasing SG-AR levels between home measurements indicate progression from a healthy middle ear to AOM.
- To assess the diagnostic performance of SG-AR in identifying AOM development.
Main Methods:
- 185 children (6-35 months) performed daily home SG-AR measurements.
- Paired SG-AR results were analyzed, defining "increasing levels" as a difference of ≥2.
- Middle ear status was confirmed via pneumatic otoscopy at a clinic.
Main Results:
- Increasing SG-AR levels showed 63% sensitivity and 94% specificity for AOM development.
- Positive and negative predictive values for increasing levels were 71% and 92%, respectively.
- No change in SG-AR levels (≤1 difference) had 88% sensitivity and 69% specificity for AOM.
Conclusions:
- Increasing SG-AR levels may lack sufficient sensitivity to detect the onset of AOM in symptomatic children.
- A stable SG-AR level (no change between measurements) strongly suggests the absence of AOM in an initially healthy middle ear.
