Journal
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
Volume 123, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jmbbm.2021.104660
Keywords
Skin fracture; Needle penetration; Skin tension; Insertion speed; Skin tissue
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The fracture properties of skin tissue are crucial in medical treatments and surgeries. Experimental results showed that skin tension has a significant impact on fracture properties, while insertion speed has a negligible effect. Additional parameters beyond the three independent variables influence the fracture process.
Using metal needles to penetrate skin tissue is common in medical treatments for the delivery of medication or minimally invasive surgery. In most applications the fracture properties of skin tissue is not important as the human surgeon has full control over the needle. Given that robotically controlled surgeries and self applied medical devices have become increasingly popular, a better understanding of the fracture properties and how to mathematically model the fracture process is needed. Experiments measuring the force required to fracture porcine skin tissue were done while varying the applied skin tension, needle insertion speed and needle diameter. The applied skin tension was found to have the greatest influence on the fracture properties, while the insertion speed was found to have a negligible impact. The variance in experimental results was not well explained by the three independent variables alone, suggesting that additional parameters influence the fracture process.
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