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[Interobserver reliability of a portable tympanometer, the MicroTymp]
M Labrecque1, L P Dostaler, H Dumont
1Département de médecine familiale, Université Laval, Sainte-Foy, Qué.
Summary
The MicroTymp portable tympanometer shows moderate interobserver reliability for tympanogram interpretation. Clinical correlation is essential when using these diagnostic tools.
Area of Science:
- Otolaryngology
- Family Medicine
- Medical Device Evaluation
Context:
- Study conducted in a family medicine teaching unit at a tertiary care hospital.
- Evaluated 33 patients presenting with ear problems to an ENT clinic.
- Utilized the MicroTymp, a portable tympanometer, for tympanogram acquisition.
Purpose:
- To assess the interobserver reliability of tympanograms generated by the MicroTymp.
- To determine the consistency of interpretation among multiple healthcare providers.
Summary:
- Three family medicine residents independently recorded tympanograms using the MicroTymp for 66 ears.
- 177 tympanograms were classified into five categories by four physicians using objective criteria.
- Interobserver reliability was calculated using the kappa coefficient on 161 tympanograms from 59 ears with agreed interpretations.
Impact:
- The MicroTymp demonstrated moderate interobserver reliability (kappa = 0.52).
- No significant differences in reliability were found between observer pairs or ear types (symptomatic vs. asymptomatic).
- Findings suggest that MicroTymp tympanograms require interpretation alongside clinical findings for accurate diagnosis.