A combination of experimental and finite element analyses of needle-tissue interaction to compute the stresses and deformations during injection at different angles

作者：Halabian Mahdi; Beigzadeh Borhan; Karimi Alireza^*; Shirazi Hadi Asgharzadeh; Shaali Mohammad Hasan

来源：Journal of Clinical Monitoring and Computing, 2016, 30(6): 965-975.

DOI：10.1007/s10877-015-9801-9

• Needle-tissue interaction
• Vein tissue
• Finite element modeling
• Pain score
• Angle of injection

One of the main clinical applications of the needles is its practical usage in the femoral vein catheterization. Annually more than two million peoples in the United States are exposed to femoral vein catheterization. How to use the input needles into the femoral vein has a key role in the sense of pain in post-injection and possible injuries, such as tissue damage and bleeding. It has been shown that there might be a correlation between the stresses and deformations due to femoral injection to the tissue and the sense of pain and, consequently, injuries caused by needles. In this study, the stresses and deformations induced by the needle to the femoral tissue were experimentally and numerically investigated in response to an input needle at four different angles, i.e., 30A degrees, 45A degrees, 60A degrees, and 90A degrees, via finite element method. In addition, a set of experimental injections at different angles were carried out to compare the numerical results with that of the experimental ones, namely pain score. The results revealed that by increasing the angle of injection up to 60A degrees, the strain at the interaction site of the needle-tissue is increased accordingly while a significant falling is observed at the angle of 90A degrees. In contrast, the stress due to injection was decreased at the region of needle-tissue interaction with showing the lowest one at the angle of 90A degrees. Experimental results were also well confirmed the numerical observations since the lowest pain score was seen at the angle of 90A degrees. The results suggest that the most effective angle of injection would be 90A degrees due to a lower amount of stresses and deformations compared to the other angles of injection. These findings may have implications not only for understating the stresses and deformations induced during injection around the needle-tissue interaction, but also to give an outlook to the doctors to implement the most suitable angle of injection in order to reduce the pain as well as post injury of the patients.

• 出版日期2016-12