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Artificial Diamond: A new Technology to Custom Design Microsurgical Instruments
1Spraul C. W., 1Weingärtner W. E., 1Lang G. K., 2Lingenfelder C., 3Ertl S., 3Schirmer E., 3Gretschel A. A.,
1Universität Ulm, Augenklinik und Poliklinik (Ulm)
2GFD-Gesellschaft für Diamantprodukte, Marketing & Verkauf (Ulm)
3GFD-Gesellschaft für Diamantprodukte (Ulm)
Purpose: In ophthalmic microsurgery the quality of the knifes may be important for the surgical outcome. This video shows a way to determine the influence of different parameters of knives for ophthalmic surgery on the penetration force and tactile perception utilizing artificial diamond blades.
Method: We utilized a process known from Microsystems technology to produce diamond blades. This method is based on so-called highly oriented, polycrystalline diamond (HOD) films. Utilizing this technique we were able to reliably produce blades with different parameters such as varying including apex angle, surface roughness, etc. We measured the force, which is necessary to penetrate a synthetic tissue using a high precision force-displacement measurement unit. For the correlation with the tactile perception, experienced surgeons performed paired comparison (pc) tests.
Results: This method allows to systematically study all the parameters of a surgical knife, which may have an influence on the cutting performance of this knife. Furthermore, the results of the paired comparison tests show the correlation of the tactile perception to the measured incision characteristics.
Conclusions: The new production technology based on Microsystems technology combined with the mechanical characterization method for the first time allows to investigate the influence of different blade geometries on the penetration force and the tactile perception and may represent a useful tool for the manufacture of surgical knifes.