The use of the weber tuning fork test and ‘scratch test’ in postoperative tympanomastoid surgery

Abstract

Objective. To compare the use of the Weber tuning fork test and ‘Scratch test’ in postoperative patients following tympanomastoid surgery.Method. Prospective cohort study with control group. Southampton University Hospitals NHS Trust. Secondary care. 19 patients undergoing routine tympanomastoid surgery for middle ear disease and 18 patients undergoing translabyrinthine surgery for lateral skull base lesions.Main Outcome Measures. Localisation of Weber tuning fork. Positive or negative Scratch test: clinician applies a gentle scratch using index finger to the bandage over the operated ear. Postoperative pure tone audiometry.Results. In the context of diagnosing a hearing or non‐hearing ear, the Weber test had a specificity of 78% and sensitivity of 100%. The scratch test had a specificity of 100% and sensitivity of 100%. The Weber was 93% specific and 93% sensitive for diagnosing a unilateral conductive hearing loss.Conclusions. As a means of diagnosing an acute postoperative dead ear the Scratch test is an accurate alternative to the Weber test.References 1 Miltenburg D.M. (1994) The validity of tuning fork tests in diagnosing hearing loss. J Otolaryngol. 23, 254–2592 Behn A., Laszlo C.A., Black D., et al. (2005) Which is mightier, the tuning fork or the bone oscillator? J Otolarygol. 34, 135–139