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Central nervous system
Published in A Stewart Whitley, Jan Dodgeon, Angela Meadows, Jane Cullingworth, Ken Holmes, Marcus Jackson, Graham Hoadley, Randeep Kumar Kulshrestha, Clark’s Procedures in Diagnostic Imaging: A System-Based Approach, 2020
A Stewart Whitley, Jan Dodgeon, Angela Meadows, Jane Cullingworth, Ken Holmes, Marcus Jackson, Graham Hoadley, Randeep Kumar Kulshrestha
Vestibular schwannomas are relatively common benign tumours that arise from peri-neural Schwann cells of the vestibulocochlear nerve. Typically, they are intracanalicular but may arise outside the acoustic canal at the cerebro-pontine angle. They may be symptomatic when only a few millimetres but may develop into larger lesions; extracanalicular extension into the cerebello-pontine angle (path of least resistance) can lead to the ’ice-cream cone’ appearance shown in Figs 11.11d, e.
Device profile of the MED-EL cochlear implant system for hearing loss: overview of its safety and efficacy
Published in Expert Review of Medical Devices, 2020
Uwe Baumann, Timo Stöver, Tobias Weißgerber
Preoperative imaging cannot always be used to reliably determine the actual accessibility of the cochlear lumen. In difficult cases as inner ear malformations or vestibular schwannoma, the use of intraoperative intra-cochlear test electrodes is recommended. The insertion test tools may be used during inner ear surgery to assess the condition of the cochlea. This information can be used for selecting the best suited cochlear implant electrode variant in terms of insertion depth vs. the number of contacts inserted [11].
RESNA position on the application of ultralight manual wheelchairs
Published in Assistive Technology, 2023
Lynn A. Worobey, Jennith Bernstein, Joseph Ott, Theresa Berner, Jaqueline Black, Mary Cabarle, Tina Roesler, Sage Scarborough, Kendra Betz
MK is a 54-year-old female with a medical history significant for chronic inflammatory demyelinating polyneuropathy (CIDP) for 12 months with associated bilateral upper and lower limb weakness, balance impairment with associated falls (5 within the past 12 months), fatigue, neuropathic pain (distal upper and lower limbs), chronic low back pain due to spondylosis and spinal stenosis, vestibular schwannoma following right-sided craniectomy with resection and residual balance deficits and right-sided hearing loss.
Device profile of the Bonebridge bone conduction implant system in hearing loss: an overview of its safety and efficacy
Published in Expert Review of Medical Devices, 2020
Stephen Jones, Patrick Spielmann
The device is MRI-conditional for magnet field strengths up to 1.5 T; however, the magnet and BC-FMT cause significant signal void, which means that MRI image is not suitable for diagnosis in the area surrounding the device [8]. Due to the MRI artifacts, it should not be used in patients who are likely to require scanning of the area, such as patients who have previously undergone treatment for vestibular schwannoma, who require follow-up MRI scans for monitoring.