Bio-inspired beveled-tip puncture needles with enhanced flexibility and damage sensing

Area of Science:

• Biomedical Engineering
• Materials Science
• Bio-inspired Design

Background:

• Puncture needles are crucial in clinical settings, valued for minimal invasiveness and control.
• Complex anatomical structures necessitate improved flexibility and safety in current puncture needle designs.
• Existing needles face challenges in navigating intricate human anatomy, demanding enhanced performance characteristics.

Purpose of the Study:

• To design and evaluate novel puncture needles incorporating sidewall grooves inspired by mosquito labrum structures.
• To investigate the impact of sidewall grooves on needle flexibility and deformation characteristics.
• To assess the potential of this bio-inspired design for improving safety and damage detection in clinical procedures.

Main Methods:

• Designing puncture needles with varying sidewall groove configurations based on mosquito labrum morphology.
• Utilizing computational analysis to study needle deformation and stress distribution.
• Comparing the performance of grooved needles against conventional designs in simulated anatomical environments.

Main Results:

• Sidewall grooves were found to amplify needle deformation initiated by the beveled tip.
• The presence of sidewall grooves shifted the high-stress area from the needle tip towards its base.
• This structural modification enhances needle flexibility and makes tissue damage more apparent.

Conclusions:

• The bio-inspired sidewall groove design significantly improves puncture needle flexibility.
• The enhanced stress distribution and magnified deformation improve the sensitivity of detecting needle-induced damage.
• This innovation holds promise for safer and more effective clinical puncture procedures.