Journal of Mechanical Science and Technology

, Volume 32, Issue 11, pp 5533–5540 | Cite as

Structural design sensitivity analysis of an ultrasonically activated scalpel to improve contact pressure distribution

  • Tae Hyong Kim
  • Ahnryul Choi
  • Mun-Taek Choi
  • Joung Hwan MunEmail author
  • Hyunggun KimEmail author


Ultrasonically activated scalpels (UAS) have excellent hemostatic effects with minimal tissue damage while dissecting tissue. However, inhomogeneous contact pressure (CP) distribution at the sealing site can decrease the quality of sealing strength and cutting. In this study, we evaluated the contact mechanics of UAS using 3D finite element analysis (FEA) simulations, and examined the effects of structural design parameters on the contact mechanics (average CP, standard deviation of CP, maximum CP, and contact area) using experiment-based sensitivity analysis. The largest positive and negative response of the average CP and standard deviation of CP were 0.68-0.85 MPa and 0.81-0.44 MPa, respectively (r = 0.32 and r = -0.73, P < 0.05) when the handle length, jaw cave, and tissue pad height were increased. In conclusion, design parameters (tissue pad height, jaw cave height, jaw cave length, and handle length) of UAS demonstrating high correlation with average CP, standard deviation of CP, maximum CP, and contact area should be considered to attain evenly distributed CP for improved structural optimization of UAS.


Ultrasonically activated scalpel Sensitivity analysis Finite element Contact pressure distribution 


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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Biomechatronic EngineeringSungkyunkwan UniversityGyeonggiKorea
  2. 2.Department of Biomedical EngineeringCatholic Kwandong UniversityGangwonKorea
  3. 3.School of Mechanical EngineeringSungkyunkwan UniversityGyeonggiKorea

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