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Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads
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Skin closure by Nd:YAG laser welding.

R P Abergel, R F Lyons, R A White

    Journal of the American Academy of Dermatology
    |May 1, 1986
    PubMed
    Summary

    Laser welding offers a sterile, non-tactile method for wound closure, potentially improving cosmetic results. This technique shows rapid healing and comparable tensile strength to traditional sutures, with lower collagen gene expression.

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    Area of Science:

    • Biomedical Engineering
    • Surgical Innovation
    • Wound Healing Research

    Background:

    • Traditional wound closure methods like suturing can introduce foreign materials and carry risks of infection.
    • Exploring novel, minimally invasive techniques for wound approximation is crucial for improving patient outcomes.
    • Laser welding presents a potential alternative for sterile and precise tissue approximation.

    Purpose of the Study:

    • To compare the efficacy of Nd:YAG laser welding versus traditional suturing for closing skin incisions in a murine model.
    • To evaluate histopathological changes, tensile strength, and collagen gene expression in laser-welded versus sutured wounds.

    Main Methods:

    • Created 6 mm skin incisions on hairless mice.
    • Closed experimental wounds using Nd:YAG laser welding and control wounds with 5-0 Prolene sutures.
    • Assessed wounds daily; performed histopathology, transmission electron microscopy, tensile strength tests, and Type I collagen mRNA measurements weekly.

    Main Results:

    • Laser-welded wounds exhibited rapid healing, with functional scar tissue by day 7 and minimal residual wound by day 14.
    • Tensile strength was comparable between laser-welded and sutured wounds at all time points.
    • Collagen-specific messenger RNA levels were significantly higher in the sutured group compared to the laser-welded group.

    Conclusions:

    • Nd:YAG laser welding is a viable method for skin wound closure, demonstrating rapid healing and comparable strength to sutures.
    • Laser welding offers advantages including sterility, non-tactile application, no foreign material introduction, and potentially improved cosmetic results.
    • The reduced collagen mRNA levels in laser-welded wounds suggest a potentially less fibrotic healing process.