June 06, 2012
1 min read

Spectral gradient acoustic reflectometry only an adjunct for specific otoscopic diagnoses

You've successfully added to your alerts. You will receive an email when new content is published.

Click Here to Manage Email Alerts

We were unable to process your request. Please try again later. If you continue to have this issue please contact customerservice@slackinc.com.

Pneumatic otoscopy is a superior tool for diagnosis, but spectral gradient acoustic reflectometry can be a useful adjunct, according to results of a recently published study.

Miia K. Laine, MD, of the department of pediatrics at Turku University Hospital in Finland, and colleagues examined 514 children aged 6 to 35 months in a primary care setting to determine whether spectral gradient acoustic reflectometry (SG-AR) could be used to hone in on specific otoscopic diagnoses. The researchers compared SG-AR with pneumatic otoscopy alone and evaluated the proportions of five manufacturer-recommended SG-AR levels compared with specific otoscopic diagnoses in 2,802 symptomatic examinations and 1,240 asymptomatic clinician visits.

Laine and colleagues said for symptomatic visits, when the angle value was more than 95° (Level 1), 76% of otoscopic diagnoses were healthy middle ear and 5% were acute otitis media. Angle values between 70° and 95° (Level 2), and angle values between 60° and 69° (Level 3) were unrelated to any otoscopic diagnosis. However, Level 4 was related to AOM in 50% of examinations and in otitis media with effusion (OME) in 33%; Level 5 was associated with AOM in 64% and OME in 32% of examinations.

The researchers concluded that SG-AR use alone was not an effective means of making specific otoscopic diagnoses. Although SG-AR’s levels can differentiate between effusion and no effusion, similar to tympanometry, it cannot differentiate between AOM and OME.

Disclosure: Dr. Laine reports no relevant financial disclosures.