What terms are used to describe needle performance in suturing?

Updated: Mar 05, 2020
  • Author: Desiree Ratner, MD; Chief Editor: Dirk M Elston, MD  more...
  • Print

The following terms are employed to describe various characteristics related to needle performance:

  • Strength - Resistance to deformation during repeated passes through tissue (ie, increased needle strength results in decreased tissue trauma); ultimate moment is the measure of maximum strength determined by bending the needle to 90°, and surgical-yield moment is the amount of angular deformation that can occur before permanent needle deformation results

  • Ductility - Resistance (of a needle) to breakage under a given amount of deformation or bending

  • Sharpness - Measure of the ability of the needle to penetrate tissue; factors affecting sharpness include the angle of the point and the taper ratio (ie, ratio of taper length to needle diameter)

  • Clamping moment - Stability of a needle in a needle holder, determined by measuring the interaction of the needle body with the jaws of the needle holder

Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!