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Background: Calculation of percentage hearing loss (pHV) from the pure-tune audiogram according to Röser in 1973 or from the speech audiogram according to Boenninghaus and Röser in 1973 is a method still applied for quantitative assessment of hearing. However, this is not common for the evaluation of postoperative results of implantable hearing systems. During the regular work-up after cochlear implantation (CI) in Germany, all necessary parameters are available for calculation of pHV either from categorical loudness scaling (pHV KLS ) or speech-recognition threshold (pHV FB )., Objective: The parameters pHV KLS and pHV FB are introduced and calculated from data available from clinical routine. Their potential applicability for assessment of the result of CI is evaluated., Materials and Methods: This study comprises retrospective chart review of audiological parameters from 66 CI procedures in one tertiary referral center. pHV KLS was calculated from the equal loudness curve 5 CU, pHV FB from the Freiburg speech test in free field., Results: While pHV KLS shows small variation, the variation in pHV FB is initially larger but decreases over time. Furthermore, starting from initial fitting, the mean pHV shows convergence over time. The difference between pHV FB and pHV KLS is positive and statistically significant., Conclusion: It is possible to calculate pHV KLS and pHV FB from routine data. A correlation of the difference between pHV FB and pHV KLS with successful CI performance seems plausible., (© 2023. The Author(s).)

The Bonebridge is an active bone conduction implant (BCI) that is primarily indicated in patients with conductive and combined hearing loss. However, many of these patients present with a radical cavity as a result of previous surgery. In these cases, the implant should not be introduced into the mastoid region, but rather via a retrosigmoid approach to maintain separation from the pathological alteration. To ensure the best possible acoustic transduction, the Bone Conduction-Floating Mass Transducer (BC-FMT) should be positioned near to the cochlea. This requires precise identification of the sigmoid sinus, which cannot be achieved accurately enough using external anatomical landmarks. We thus report on two patients in whom the Bonebridge was implanted via a retrosigmoid approach using CT-guided navigation.

We report the case of a 23-year-old man presenting with a cT4 cN1 M0squamous cell carcinoma of the right tongue. After tumor resection and covering of the defect with a microvascular anterolateral thigh (ALT) flap, the patient showed distinct drooling without any substantial regression after anticholinergic therapy. For this reason 75 units of Botox® were injected into the submandibular and parotid glands. After the intraglandular injections, good reduction of saliva secretion was achieved. The treatment improved flap healing, aspiration and patient satisfaction. Injection of botulinum toxin A into the salivary glands is a sufficient therapy for postoperative hypersalivation.