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[Needles used in ocular microsurgery: comparative study using scanning electron microscopy].

J Colin, N Guirriec

    Journal Francais D'Ophtalmologie
    |January 1, 1984
    PubMed
    Summary
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    Ophthalmic microsurgical needles with fluted edges and surfaces offer superior penetration into ocular tissues. This study examined needle variations using electron microscopy to identify optimal surgical tool characteristics.

    Area of Science:

    • Ophthalmology
    • Microsurgery
    • Biomaterials Science

    Background:

    • Microsurgical sutures exhibit variable needle penetration into ocular tissues.
    • Understanding needle surface and edge characteristics is crucial for surgical outcomes.

    Purpose of the Study:

    • To analyze structural variations in ophthalmic microsurgical needles.
    • To correlate needle morphology with penetration ease into ocular tissues.

    Main Methods:

    • Scanning electron microscopy (SEM) was used to examine new and used ophthalmic needles.
    • Needles were tested after passing through corneal tissue five times.
    • Morphological features including tip sharpness, edge regularity, and surface texture were assessed.

    Main Results:

    Related Experiment Videos

    • Significant structural variations were observed among new needles, including edge regularity (smooth to notched) and surface texture (smooth to fluted).
    • Post-use examination revealed cellular debris but no damage from surgical instruments.
    • Needles with fluted edges and surfaces demonstrated superior penetration characteristics.

    Conclusions:

    • Needle surface and edge design significantly impact penetration efficiency in ophthalmic microsurgery.
    • Fluted needle designs are recommended for enhanced ease of penetration in ocular procedures.