Laser-assisted fixation of a nitinol stapes prosthesis

Schroetzlmair, Florian; Suchan, Fabian; Pongratz, Thomas; Krause, Eike; Müller, Joachim und Sroka, Ronald (2018): Laser-assisted fixation of a nitinol stapes prosthesis. In: Lasers in Surgery and Medicine, Bd. 50, Nr. 2: S. 153-157

Abstract

Background and Objective: Otosclerosis is an inner ear bone disease characterized by fixation of the stapes and consequently progressive hearing loss. One treatment option is the surgical replacement of the stapes by a prosthesis. When so called smart materials like nitinol are used, prosthesis fixation can be performed using a laser without manual crimping on the incus. However, specific laser-prosthesis interactions have not been described yet. The aim of the present study was to elucidate the thermo-mechanical properties of the NiTiBOND (R) prosthesis as a basis for handling instructions for laser-assisted prosthesis fixation. Study Design and Materials and Methods: Closure of the NiTiBOND (R) prosthesis was induced ex vivo by either a diode laser emitting at =940nm or a CO2 laser (=10,600nm). Total energy for closure was determined. Suitable laser parameters (pulse duration, power per pulse, distance between tip of the laser fiber and prosthesis) were assessed. Specific laser-prosthesis interactions were recorded. Results: Especially the diode laser was found to be an appropriate energy source. A total energy deposit of 60mJ by pulses in near contact application was found to be sufficient for prosthesis closure ex vivo. Energy should be transmitted through a laser fiber equipollent to the prosthesis band diameter. Specific deformation characteristics due to the zonal prosthesis composition have to be taken into account. Conclusion: NiTiBOND (R) stapes prosthesis can be closed by very little energy when appropriate energy sources like diode lasers are used, suggesting a relatively safe application in vivo. Lasers Surg. Med. 50:153-157, 2018.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Medizin
• Themengebiete: 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit
• ISSN: 0196-8092
• Sprache: Englisch