Development and evaluation of a titanium-based planar ultrasonic scalpel for precision surgery

• DOI: 10.1016/j.ultras.2023.106927
• Publication Date: 2023-01-06T16:12:16Z
• Authors: Martin Hofmann; Andreas Haeberlin; Simone de Brot; Andreas Stahel; Herbert Keppner; Juergen Burger
• Keywords: Titanium; Ultrasonic scalpel Ultrasonic surgery Precision surgery Piezoelectric transducer Hemostasis Equipment design; Ultrasonic Therapy; Transducers; 0103 physical sciences; Animals; 610 Medicine & health; Ultrasonics; Equipment Design; Surgical Instruments; 01 natural sciences

This paper introduces a titanium-based planar ultrasonic microscalpel. The concept of silicon-based transducers has already been proven, but they are not yet suitable for clinical use due to material failure. main objective this work was develop smaller, lighter, and more cost-effective scalpel that could be used as an alternative or supplementary device current surgical instruments. Various prototypes were fabricated characterized, differing in bonding by three epoxy adhesives two solder pastes well variations tip design. instruments designed operate the frequency range commercial generate longitudinal displacement amplitude. electro-mechanical characterization through impedance analysis vibration measurements complemented vitro cutting trial acute vivo animal experiment comparison electrosurgical devices. operating around 40 kHz 48 depending on whether matched unmatched operation used. Unmatched turned out suitable, achieving amplitudes 25.3 μm associated velocity up 7.9 m/s at electrical power 10.2 W. ability demonstrated successful dissection even under anticoagulation. geometry instrument found have major influence performance affecting resonance behaviour tissue penetration.