J Am Acad Audiol 2006; 17(08): 573-581
DOI: 10.3766/jaaa.17.8.4
American Academy of Audiology. All rights reserved. (2006) American Academy of Audiology

Evaluation of a Probe-Tube Insertion Technique for Measuring the Real-Ear-to-Coupler Difference (RECD) in Young Infants

Marlene P. Bagatto
Richard C. Seewald
Susan D. Scollie
Anne Marie Tharpe
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Publication Date:
07 August 2020 (online)

A common strategy for measuring the real-ear response of the real-ear-to-coupler difference (RECD) in the pediatric population is to insert a probe-tube separately from the eartip. This strategy is at times difficult to implement while attempting to obtain the measurement from a young infant. An RECD probe-tube insertion technique that involves connecting the probe-tube to an eartip with plastic film for simultaneous insertion was examined on 30 infants. Repeated measurements were completed on each infant to obtain within-session test-retest reliability data. Probe-tube insertion depth was also examined across participants to provide a guideline for the infant population. Findings indicate that reliable RECD values can be obtained in infants when the probe-tube is extended approximately two to four millimeters (mm) beyond the eartip or 11 mm from the entrance to the ear canal. Clinical implications of this work are discussed.