Smart Materials in der minimal-invasiven Chirurgie / Smart Materials in Minimally Invasive Surgery

Entwicklung eines Technologiedemonstrators für de Einsatz von Formgedächtnislegierungen in der minimal-invasiven Chirurgie / Development of a technology demonstrator for the use of shape memory alloys in minimally invasive surgery

Fabian Schober

Fraunhofer-Institut für Werkzeugmaschinen und Umformtechnik / Fraunhofer Institute for Machine Tools and Forming Technology

Dezember / December - 2021

Technische Universität Dresden



Minimally invasive surgery refers to operations performed through the smallest body incisions with the help of special instruments and camera systems. The gripping instruments used today usually provide insufficient haptic feedback. Misjudgements of the gripping force can lead to tissue damage. Shape memory alloys (SMA) are smart metals that can be deformed and reshaped through electric activation. They can be used to control grippers as well as gripping force sensors. Using selected design methodology, surgical use cases were identified where the technology can add significant benefits. An intelligent grasping instrument was developed that integrates innovative but essential functions missing in today's instruments through the use of SMA. To communicate the research results, the gripper was embedded in a physical demonstrator representing an abstracted surgical scenario.