AI Article Synopsis
- This study investigates how the amount of Müller's muscle-conjunctiva resected during ptosis surgery impacts patient outcomes.
- A total of 49 patients had 87 surgeries, with findings showing an average of 21% muscle tissue in the excised samples and some positive correlations between surgical measurements and eyelid position improvements.
- The results suggest that surgical success is linked to the plication or scarring of eyelid tissue rather than the amount of muscle removed, indicating that more tissue excision may lead to better eyelid lift rather than focusing solely on muscle excision.
Article Abstract
Aims: To explore the relationship between the amount of resected Müller's muscle-conjunctiva (MMCR) and clinical outcome in patients undergoing upper eyelid ptosis surgery.
Methods: 49 patients underwent 87 MMCR surgeries. The total areas of the specimen and of MM were measured in pixels.
Results: The average percentage of muscle tissue in relation to total excised tissue was 21%. Intraoperative MMC tissue measurements and postoperative improvement in eyelid position (delta marginal reflex distance 1 (MRD1)) were positively correlated (R=0.427, p=0.09). There was a weak correlation between total areas measured on the histological slides and the intraoperative MMCR values (R=0.3, p=0.057). Total histological areas did not correlate with the delta change in eyelid position or with the amount and percentage of resected muscle tissue and the extent of improvement in eyelid position (delta MRD1) or final eyelid position (postoperative MRD1).
Conclusions: Post-MMCR improvement in eyelid positions did not correlate with the percentage of MM in the excised tissue. We believe that the mechanism responsible for surgical outcome is plication or scarring of the posterior lamella and not the amount of resected MM. More lift in eyelid position can be anticipated when more tissue is excised by MMCR, and not when more muscle is excised.
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| http://dx.doi.org/10.1136/bjophthalmol-2012-302541 | DOI Listing |
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