A generalized analytical model of the cutting angles of a biopsy needle tip

Kornel Ehmann*, Kostyantyn Malukhin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


A general analytical model of the geometry of a biopsy needle tip is formulated. The model is then used to derive the correlations for the characteristic cutting mechanics angles and for their respective distribution along the active cutting edges of the needle tip. The angles are defined in analogy to the definitions used in cutting tool design for material removal operations. Specifically, analytical expressions for the inclination and rake angles of the tip are derived. The validity of the models was confirmed through their application to plausible needle tip geometries such as: flat, cylindrical and helical tips. The knowledge of the tip geometry and of the relevant angles is a prerequisite for the understanding of tissue cutting mechanics.

Original languageEnglish (US)
Article number061001
JournalJournal of Manufacturing Science and Engineering
Issue number6
StatePublished - 2012

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Mechanical Engineering
  • Computer Science Applications
  • Industrial and Manufacturing Engineering


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