Description du projet :
Ultrasonic cutting instruments are widely used in various fields of surgery including e.g. peripheral vascular surgery; colorectal surgery; bariatric surgery, breast surgery; general and visceral surgery. Their precise control over coagulation and cutting allows to limit the tissue damage causing thermal spread and qualifies them as efficient and safe surgical tool. However, their use is restricted to certain surgery fields due to the size, weight and costs of the current systems. In order make this technology accessible in e.g. Cranio'Maxillofacial (CMF) surgery for specific tumor interventions, an ultrasonic Microscalpel with small form factor for high'precision surgery will be developed and characterized by using a concept for quasi 2'dimensional ultrasonic instrument based on a planar Ti'horn. The mechanical design of the novel Microscalpel will be developed and optimized with respect to high tip displacement (displacement of the tip > 50 'm) and reliability by using flat, quasi 2'D Ti horns, low aspect ratios as well as low driving voltages. In addition, the scalpel will be designed to satisfy the ergonomic and functional constraints for use in CMF surgery. In order to be able to drive the first functional demonstrators, an electronics for piezo supply voltages of up to +'150V will be developed. The control of the tip resonant motion will be realized digitally, to improve functionality (robustness vs. parameter variations, automatic gain setting) as compared to state'of'the'art analog scalpel control. A hermetic housing for the Microscalpel will be developed and optimized for human factor studies using additive manufacturing. Finally, using bench tests, the Microscalpel will be characterized using Laser Doppler Vibrometry. The relevant standards will be identified and implemented into the bench tests
Equipe de recherche au sein de la HES-SO:
Praplan Charles
, Bircher Fritz
, Huber Benjamin
, Moerschell Joseph
, Broggini Christiane
, Prieur Claudio
, Soutrenon Mathieu
, Hochstrasser Eric
, Hofmann Martin
, Carrie Natalia
Partenaires académiques: VS - Institut Systèmes industriels; FR - EIA - Institut IPRINT; Dispositifs médicaux
Durée du projet:
01.12.2016 - 28.02.2019
Montant global du projet: 230'286 CHF
Statut: Terminé
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