The utility of a 256 Hz tuning fork in the diagnosis of superior canal dehiscence

Study ID
STU 062012-092

Cancer Related
No

Healthy Volunteers
No

Study Sites

  • UT Southwestern Ambulatory Services

Contact
Kristy Carter
214-648-3626
kristy.carter@utsouthwestern.edu

Principal Investigator
Joe Kutz

Summary

in order to determine the application of a screening tool for patients with SSCD, this project will consist of the following: identifying all patients presenting to the uT Southwestern Medical Center with a diagnosis of SSCD during the period from January 1, 2008 to June 15, 2012. Following subject identification, a systematic review of each patient's medical record will be conducted. Medical history, physical examination, lab reports, all imaging reports, diagnostic testing including but not limited to comprehensive audiologic testing, vestibular testing, tuning fork test results, operative reports, clinic notes, MD correspondence and correspondence from others concerning the results will be evaluated. Similarly, patients with unilateral conductive hearing loss will be evaluated for the following: medical history, physical examination, lab reports, all imaging reports, diagnostic testing including but not limited to comprehensive audiologic testing, vestibular testing, tuning fork test results, operative reports, clinic notes, MD correspondence and correspondence from others concerning the above. This information will be codified to optimize data interpretation. also, positive and negative likelihood ratios for tuning fork testing in screening for SSCD will be calculated.

Participant Eligibility

All patients who underwent evaluation of SSCD at UT Southwestern Medical Center during the period of 2008-2012 will be reviewed, regardless of race, gender, or other medical conditions. Only patients who have surgery with confirmed SSCD will be included in the study.

For the control arm, patients must have a unilateral conductive hearing loss of greater than or equal to 15 dB when averaging 500, 1000, 2000, and 3000 Hz.

The control group will consist of:
1. 25-30 patients with conductive hearing loss with an air bone gap greater than 20 dB averaged at 500, 1000, 2000, and 3000 Hz.
2. 6-8 patients with a unilateral sensorineural hearing loss with an asymmetry greater than 30 dB.
3. 6-8 subjects with normal hearing.