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Brain stem implantable electrodes in management of total deafness after removal of acoustic neuroma - a review of operative approaches

100%

Skarzynska B. , Skarzynski H. , Niemczyk K.

nr 4

Helmet mounted display based system for stereoscopic visualization supporting inner ear operation

88%

Kucharski T. , Kujawińska M. , Leśniewski M. , Niemczyk K. , Bruzgielewicz A.

tom Vol. 45, nr 8-9

120-122

In this paper authors present a system consisting of operational stereoscopic microscope with two image acquisition channels, data processing unit and Helmet Mounted Display (HMD) for stereoscopic of visualization field. Special attention is paid to the development of automatic image low contrast enhancement. The algorithms are optimized for stereo visualization of biological micro-structures of inner ear. Some of those structures have quasi-phase nature and are almost invisible by human eye. The tests performed at the images captured during operation have been positively evaluated by surgeons. The performance of the system presented ascertained that quality of inner ear processed images guaranties safety carrying of operations not undertaken so far.

Autorzy prezentują system zawierający operacyjny mikroskop stereoskopowy obsługujący dwa kanały rejestrujące, program przetwarzający dane oraz hełm optyczny (HMD) służący do stereoskopowej wizualizacji wzbogaconego obrazu pola operacyjnego. W pracy poświęcono uwagę wzbogaceniu obrazu oryginalnego tkanek ucha wewnętrznego. Tkanki te posiadają quasi-fazową naturę i są trudno rozróżnialne przez ludzkie zmysły. Testy przeprowadzone podczas operacji zostały pozytywnie ocenione przez chirurgów. Projekt udowodnił, że jakość przetworzonych umożliwia podjąć się operacji zaniechanych jak dotąd.

The topographical anatomy of the round window and related structures for the purpose of cochlear implant surgery

75%

Paprocki A. , Biskup B. , Kozlowska K. , Kuniszyk A. , Bien D. , Niemczyk K.

nr 3

The treatment of total deafness using a cochlear implant has now become a routine medical procedure. The tendency to expand the audiological indications for cochlear stimulation and to preserve the remnants of hearing has brought new problems. The authors have studied the topographical anatomy of the internal structures of the ear in the area where cochleostomy is usually performed and an implant electrode inserted. Ten human temporal bones were obtained from cadavers and prepared in a formalin stain. After dissection of the bone in the area of round and oval windows, the following diameters were measured using a microscope with a scale: the transverse diameters of the cochlear and vestibular scalae at the level of the centre of the round window and 0.5 mm anteriorly to the round window, the distance between the windows and the distances from the end of the spiral lamina to the centre of the round window and to its anterior margin. The width of the cochlear scala at the level of the round window was 1.23 mm, and 0.5 mm anteriorly to the round window membrane it was 1.24 mm. The corresponding diameters for the vestibular scala are 1.34 and 1.27 mm. The distances from the end of the spiral lamina to the centre of the round window and to its anterior margin are 1.26 and 2.06 respectively. The authors noted that the two methods of electrode insertion show a difference of 2 mm in the length of the stimulated spiral lamina. The average total length of the unstimulated lamina is 2.06 and 4.06 in the two situations respectively.