Machining of superelastic instruments for minimal invasive surgery with ultrashort laser pulses

Heinz Haferkamp; Alexander von Busse; Jens Bunte; M. Fargas; M. Hustedt; Stefan Paschko

doi:10.1117/12.530211

1 June 2004 Machining of superelastic instruments for minimal invasive surgery with ultrashort laser pulses

Heinz Haferkamp, Alexander von Busse, Jens Bunte, M. Fargas, M. Hustedt, Stefan Paschko

Proceedings Volume 5340, Commercial and Biomedical Applications of Ultrafast Lasers IV; (2004) https://doi.org/10.1117/12.530211
Event: Lasers and Applications in Science and Engineering, 2004, San Jose, Ca, United States

Abstract

In the course of increasing miniaturization of components in minimal access surgery the superelastic properties of nickel titanium shape memory alloys (NiTi-SMA) find more and more attention. However, only a few processes are available for machining of miniaturized NiTi-components. Changes of the mechanical properties due to heat input or mechanical tensions have to be avoided. Especially for complex geometries with dimensions in the submillimeter-range, these requirements are hardly to meet. Finding new methods for manufacturing micro-instruments of NiTi wires with high geometrical resolution and superelastic mechanical properties for applications in endoscopic surgery are the main goals of the investigations presented here. Because of the precise focussing properties and the possibility of an excellent non-tactile energy coupling, material processing by lasers is a suitable alternative to conventional machining-processes. Comparing investigations with laser systems with different wavelengths and pulse duration show the suitability of ultra-short pulse Ti:Sapphire lasers for this machining process. Only by the use of ultra-short laser pulses it is possible to structure micro-components of NiTi almost without thermal influence. Results of mechanical and metallographic examinations show that the special properties of miniaturized SMA-components can be maintained. Experimental results as well as example geometries produced with ultra-short pulse lasers are presented in the paper.

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Heinz Haferkamp, Alexander von Busse, Jens Bunte, M. Fargas, M. Hustedt, and Stefan Paschko "Machining of superelastic instruments for minimal invasive surgery with ultrashort laser pulses", Proc. SPIE 5340, Commercial and Biomedical Applications of Ultrafast Lasers IV, (1 June 2004); https://doi.org/10.1117/12.530211

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KEYWORDS

Pulsed laser operation

Surgery

Manufacturing

Shape memory alloys

Laser drilling

Laser therapeutics

Laser processing

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