World Neurosurg
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Keeping track of the endoscope tip in 3 planes (axial, coronal, and sagittal) while performing skull base surgeries can be difficult because the surgeon is focused most on the live video images of the endoscope. For that reason, it was the aim of this anatomical cadaver study to evaluate the usefulness of a voxel-based neuronavigation system with 3-dimensional (3D) perspective image rendering for endoscopic procedures through keyhole approaches to the skull base. ⋯ A neuronavigation system with 3D voxel-based perspective image rendering could potentially improve safety during complex skull base surgeries, and possibly also help to improve surgical results. Such a system, however, cannot replace a neurosurgeon's experience nor surgical skill or anatomical knowledge. It is an excellent teaching tool for young neurosurgeons, but it also has some limitations. Therefore, clinical studies will be necessary to further evaluate the benefits of this type of neuronavigation system in a clinical setting.
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Ninety-five percent of the Hong Kong population is Chinese, and no previous epidemiological study has focused on spontaneous subarachnoid hemorrhage (SAH) in Hong Kong. These data would have significant public health implications and can guide future resource allocations and service development in Hong Kong. The aim of this study was to investigate the local incidences of spontaneous SAH and 1-year mortality rates in Hong Kong, with the respective time trends in recent years. ⋯ The Hong Kong SAH incidence was 7.5 per 100,000 person-years in 2010, and an increasing trend over time was noted. The 1-year mortality rates decreased from 43% in 2002 to 19% in 2010, in accordance with the worldwide trend.