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Related Experiment Videos

Skin flap delay procedures: proximal delay versus distal delay

C Cutting, J Bardach, D Rosewall

    Annals of Plastic Surgery
    |April 1, 1980
    PubMed
    Summary

    Delaying the proximal portion of a flap significantly improves flap survival. Complete delay of the flap offers the best survival rates, challenging previous assumptions about flap delay.

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    Area of Science:

    • Plastic Surgery
    • Surgical Research
    • Tissue Viability

    Background:

    • Flap necrosis commonly affects the distal portion of surgical flaps.
    • It is often assumed that delaying only the distal flap is necessary to improve survival.
    • The underlying mechanisms of the flap delay phenomenon require further elucidation.

    Purpose of the Study:

    • To determine whether the proximal or distal portion of a flap contributes more to the flap delay phenomenon.
    • To investigate the impact of delaying different portions of a flap on its survival.
    • To evaluate the efficacy of complete flap delay compared to partial delay.

    Main Methods:

    • Experimental study using random-pattern pig flank flaps (16 x 3 cm).
    • Comparison of flap survival in control groups versus groups with delayed distal half, delayed proximal half, or completely delayed flaps.
    • Statistical analysis to determine significant differences in flap survival rates.

    Main Results:

    • Control flaps survived to at least 8 cm.
    • Flaps with delayed distal half showed no significant difference in survival compared to controls.
    • Flaps with delayed proximal half exhibited significantly greater survival than undelayed controls.
    • Completely delayed flaps demonstrated significantly better survival than all other groups.

    Conclusions:

    • Delaying the proximal portion of a flap is more critical for enhancing flap survival than delaying the distal portion.
    • Findings contradict the metabolic adaptation and denervation supersensitivity-arteriovenous anastomosis hypotheses.
    • Results support the vascular collateral and basal capillary shunting hypotheses for flap delay mechanisms.

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