Technical Brief

Tissue Deformation and Insertion Force of Bee-Stinger Inspired Surgical Needles

[+] Author and Article Information
Mohammad Sahlabadi

Department of Mechanical Engineering,
Temple University,
Philadelphia, PA 19122
e-mail: mohammad.sahlabadi@temple.edu

Parsaoran Hutapea

Department of Mechanical Engineering,
Temple University,
Philadelphia, PA 19122
e-mail: hutapea@temple.edu

1Corresponding author.

Manuscript received January 8, 2018; final manuscript received June 1, 2018; published online July 30, 2018. Editor: William Durfee.

J. Med. Devices 12(3), 034501 (Jul 30, 2018) (4 pages) Paper No: MED-18-1004; doi: 10.1115/1.4040637 History: Received January 08, 2018; Revised June 01, 2018

Surgical needles are commonly used to reach target locations inside of the body for percutaneous procedures. The major issues in needle steering in tissues are the insertion force which causes tissue damage and tissue deformation that causes the needle path deviation (i.e., tip deflection) resulting in the needle missing the intended target. In this study, honeybee-inspired needle prototypes were proposed and studied to decrease the insertion force and to reduce the tissue deformation. Three-dimensional (3D) printing technology was used to manufacture scaled-up needle prototypes. Needle insertion tests on tissue-mimicking polyvinyl chloride (PVC) gel were performed to measure the insertion force and the tip deflection. Digital image correlation (DIC) study was conducted to determine the tissue deformation during the insertion. It was demonstrated that the bioinspired needles can be utilized to decrease the insertion force by 24% and to minimize the tip deflection. It was also observed that the bioinspired needles decrease the tissue deformation by 17%. From this study, it can be concluded that the proposed bee-inspired needle design can be used to develop and manufacture innovative surgical needles for more effective and less invasive percutaneous procedures.

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Fig. 6

The DIC study of a bioinspired needle θ1 = 170 deg, θ2 = 90 deg, h = 0.5 mm, LB = 40 mm, t = 0.2 mm. In our DIC images 1 pixel (PX) equals to 0.403 mm: (a) map of tissue deformation in honeybee-inspired needle insertion in x-direction (U), (b) map of tissue deformation in conventional needle insertion in x-direction (U), (c) map of tissue deformation in honeybee-inspired needle insertion in y-direction (V), and (d) map of tissue deformation in conventional needle insertion in y-direction (V).

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Fig. 5

Needle deflection curves versus insertion depth

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Fig. 4

Effect of barbs on insertion force for needles with (a) θ1 = 170 deg and θ2 = 90 deg, (b) a conventional needle, and (c) θ1 = 170 deg and θ2 = 170 deg [12,13]

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Fig. 3

Needle insertion force versus insertion depth

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Fig. 2

Needle insertion test setup

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Fig. 1

A captured honeybee stinger compared to the proposed design. Notice that the dashed line indicates the outer diameter of the needle body in the bioinspired needle design. θ1 is front angle and θ2 is back angles, h is the barb height.



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