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The cutting-edge microvascular needle. A scanning electron microscopic study.

D M Pagnanelli, J F Naradzay, T G Pait

    Journal of Neurosurgery
    |September 1, 1983
    PubMed
    Summary
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    Sharp microvascular needles caused similar vascular damage to blunt-tipped needles. Both needle types produced comparable lesions, with slight reductions in tearing and platelet aggregation observed with sharp needles.

    Area of Science:

    • Vascular Surgery
    • Microsurgery
    • Histopathology

    Background:

    • Microvascular surgery requires precise инструментаtion to minimize tissue damage.
    • Previous studies indicated vascular endothelial damage from blunt-tipped microvascular needles.
    • The comparative damage profile of sharp cutting-edged needles remains less understood.

    Purpose of the Study:

    • To compare the extent and type of vascular endothelial damage induced by sharp cutting-edged microvascular needles versus blunt-tipped needles.
    • To evaluate intimal tearing and platelet aggregation associated with each needle type.

    Main Methods:

    • Sharp cutting-edged and blunt-tipped microvascular needles of comparable size were used to create vascular lesions.
    • Lesions were created by a single experimenter, with consistent tissue handling protocols.

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  • Histopathological analysis was performed to identify and quantify vascular lesions, intimal damage, and platelet aggregation.

    • Main Results:

    • Both sharp and blunt-tipped needles produced the same four distinct types of vascular lesions.
    • Significant variability in the extent of intimal damage was observed, irrespective of needle type.
    • Sharp cutting-edged needles resulted in slightly less intimal tearing and platelet aggregation compared to blunt-tipped needles, though the difference was not statistically significant.

    Conclusions:

    • Sharp cutting-edged microvascular needles induce comparable vascular endothelial damage to blunt-tipped needles.
    • The choice between sharp and blunt needles may have minimal impact on the observed vascular lesions and intimal damage.
    • Further research may be needed to explore factors contributing to the variability in intimal damage.