PubMed · 8948979
The source did not provide an abstract. Follow the original record for more information.
Explore connections, maps & timelines
I E Zach. [New thinking about nursing...].. https://pubmed.ncbi.nlm.nih.gov/8948979/
Cite the original work for its findings. Save a collection to share your selection of sources.
KEEP EXPLORING
Explore the source record for details and available documents.
The aim of the study was to report the current surgical procedure that has been established on the basis of about 200 implantations with the Combi 40/40+ implant system. The outstanding features of this procedure are the skin incision and the fact that the electrode can be inserted up to a depth of 34 mm into the cochlea. In order to provide better magnetic positioning of the external parts, a flap-reducing technique may be required. For insertion we used a soft surgery method to preserve structures within the cochlea. In some cases we were able to inspect the cochlea with microendoscopes, which helped to prevent electrode kinking, since fibrous obliterations were found before the insertion. For electrode fixation in the mastoid cavity we used bone paté.
Following cochlear implantation, postoperative imaging of the electrode is very important in order to measure the depth of insertion and the position of the electrode, so that kinking and incorrect electrode placement can be clearly identified. The aim of this study was to outline the diagnostic value of CT and conventional X-ray for these parameters. For this purpose we obtained radiographs of patients who had received a cochlear implant. Computed tomography was performed by obtaining axial sections. For conventional X-ray we used digital imaging, utilising a modified Chausse III projection. The images were then rated according to electrode position, insertion depth and possible complications. We also measured the radiation dose using a dummy and evaluated the cost of each examination. Both examinations permit excellent identification of electrode position and insertion depth. However, the depth of insertion can be measured much more accurately by means of digital X-ray. The radiation dose of CT was 230 times higher than that of conventional X-ray and the cost of CT 5 times that of digital X-ray.