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Insertion mechanics of bioinspired needles into soft tissues
Mohammad Sahlabadi1, Seyedvahid Khodaei1, Kyle Jezler1
1a Department of Mechanical Engineering , Temple University , Philadelphia , PA , USA.
Summary
This study introduces novel bioinspired needles that significantly reduce insertion force in brain and liver tissues. These minimally invasive needles minimize tissue damage, addressing a critical need in neurosurgery and other medical fields.
Area of Science:
- Biomedical Engineering
- Materials Science
- Neurosurgery
Background:
- Increased needle insertion force correlates with greater tissue damage, posing risks like traumatic brain injury.
- Minimally invasive surgical tools are in high demand to reduce patient trauma.
- Previous research demonstrated a 25% insertion force reduction using bioinspired needles in PVC gels.
Purpose of the Study:
- To design and test novel bioinspired needles for reduced insertion force in biological tissues.
- To evaluate the efficacy of these needles in reducing tissue damage during insertion.
- To validate findings in real biological tissues, specifically bovine brain and liver.
Main Methods:
- Bioinspired needles were designed using CAD software.
- Needles were manufactured using 3D printing technology.
- Insertion tests were conducted on bovine brain and liver tissues.
Main Results:
- A 10-25% decrease in insertion force was observed for bovine brain tissue.
- A 35-45% reduction in insertion force was achieved in bovine liver tissue.
- Results indicate significant force reduction compared to conventional needles.
Conclusions:
- The bioinspired needle design effectively reduces insertion force by minimizing friction.
- Findings are consistent with previous studies using tissue-mimicking gels.
- This technology holds promise for safer, less invasive surgical procedures.
