CT-guided core needle biopsies of head and neck tumors: a comprehensive monocenter analysis of safety and outcomes.

Background: Although core needle biopsy is an important tool in minimally invasive tissue sampling and diagnostics for head and neck masses, comprehensive data about safety and outcomes is lacking.

Purpose: To retrospectively evaluate the diagnostic performance and safety of computed tomography (CT)-guided percutaneous core needle biopsy of head and neck masses.

Material And Methods: This retrospective single-center study included patients from 04/2007 to 12/2021, and a total of 156 core needle biopsies were evaluated.

Investigation of pitch discrimination and the effect of learning for virtual channels realized by current steering.

Conclusion: As virtual channels could be perceived by the majority of implant users, they promise potential for advanced speech coding strategies, providing enhanced spectral resolution. An improvement in resolution was found from first stimulation up to 6 months afterwards.

Objective: Independent current sources allow distribution of the current between adjacent electrode contacts in a defined ratio, thus steering the current.

A case of unilateral hypoglossus nerve palsy associated with chordoma in the region of clivus.

We had a rare case of 50-year-old woman with a unilateral hypoglossus nerve palsy as a sign of clival chordoma. A computed tomography (CT) scan of the skull base showed bone destruction at the anterior part of the foramen magnum and CT scan of the neck reveals asymmetrical area at the base of the tongue. Magnetic resonance imaging showed a mass at the skull base in the region of the clivus with bone destruction in the middle and right side of the clivus.

The Advanced Bionics High Resolution Mode: stimulation rates up to 5000 pps.

Conclusion: The technology of stimulation rates between 1500 and 5000 pulses per second per channel (pps/ch) brings a benefit for all users. However, the fastest possible rate does not necessarily lead to best hearing performance in each individual subject. Individual optimization of stimulation rate is recommended.

Differential fine-tuning of cochlear implant material-cell interactions by femtosecond laser microstructuring.

Cochlear implants (CIs) can restore hearing in deaf patients by electrical stimulation of the auditory nerve. To optimize the electrical stimulation, the number of independent channels must be increased by reduction of connective tissue growth on the electrode surface and selective neuronal cell contact. The femtosecond laser microstructuring of the electrode surfaces was performed to investigate the effect of fibroblast growth on the implant material.

Comparison of a paired or sequential stimulation paradigm with advanced bionics' high-resolution mode.

Objective: Simultaneous stimulation on two channels was investigated with respect to fully sequential stimulation while controlling for the number of channels and the stimulation rate used.

Study Design: Only subjects having at least 6 months' experience with conventional Clarion speech coding strategies (CIS, PPS, or SAS) were included. A counterbalanced cross-over design was used to compare the paired stimulation paradigm to the sequential stimulation paradigm.