Gold weight with single hole versus multiple holes--experimental study in rabbits

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Materials Science

Background:

• Lagophthalmia, often resulting from facial paralysis, poses a significant risk to ocular health.
• Gold weight application to the upper eyelid is a common treatment, but complications like displacement and extrusion are frequent.
• Existing gold weight designs are prone to migration, necessitating improved designs.

Purpose of the Study:

• To evaluate a modified gold weight design featuring multiple holes for improved stability and reduced complication rates.
• To test the hypothesis that increased fibrous tissue integration through multiple holes enhances resistance to displacement and extrusion.

Main Methods:

• Ellipsoid gold weights (1.8g) with single and multiple holes were implanted subcutaneously in the dorsal rabbit ear model.
• Comparative analysis of macroscopic and microscopic extrusion and displacement rates at two and three weeks post-implantation.
• Statistical comparison using Chi-square and Mann-Whitney U tests.

Main Results:

• Gold weights with multiple holes demonstrated statistically significant reductions in displacement and extrusion compared to single-hole weights (p<0.0034).
• Enhanced fibrous tissue ingrowth was observed in the multiple-hole design, correlating with improved stability.
• No suturing was required, simplifying the procedure.

Conclusions:

• Modified gold weights with multiple holes offer a superior alternative to traditional single-hole designs for treating lagophthalmia.
• The enhanced stability is attributed to increased tissue integration facilitated by the multiple perforations.
• This modified design holds promise for minimizing surgical complications in eyelid reconstruction.