Evaluation of the associated factors for the upper eyelid levator tendon disinsertion on blepharoplasty and ptosis correction / Avaliação de fatores associados à desinserção do tendão do músculo levantador da pálpebra superior na cirurgia de blefaroplastia e ptose palpebral

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Purpose: To evaluate on patients who underwent to ptosis and dermatochalasis correction: a) the association of pre-operatory propedeutic measures (upper eyelid levator muscle function (UELMF), margin reflex distance (MRD1), and eyelid crease height (ECH)) on the amount of upper eyelid levator muscle (UELM) disinsertion. b) The association of gender, age, previous surgery, and ectropion/entropion were analyzed as predictive factors for the amount of upper eyelid levator muscle disinsertion. c) To evaluate the differences of eyelid propedeutic measures before and after surgery. d) To evaluate the amount of UELM disinsertion in the normal eyelids of patients with unilateral ptosis. e) To evaluate the amount of UELM disinsertion in patients with normal MRD1. Methods: Design of the study: prospective non comparative case series study. Population: Forty four patients with blepharoptosis and dermatochalasis were enrolled. Intervention: Exploration of the levator tendon (LT) during blepharoplasty and ptosis correction and in case of its disinsertion, the tendon was reattached to the tarsus. Outcome Measured: Margin reflex distance (MRD1), upper eyelid levator muscle function (UELMF), eyelid crease height (ECH), gender, age, diabetes, previous surgery, ectropion/entropion, and ptosis complaint were analyzed as predictive factors for the amount of upper eyelid levator muscle disinsertion. Both the uni and multivariate approaches were tested and for the latter, interaction from variables was also evaluated. The differences between UELMF, MRD1, ECH before and after surgery were evaluated bilaterally. Dependency between both eyes was corrected by generalized estimating equations. Pearson correlation was used to evaluate the dependency of the two eyes regarding UELMF, MRD1 and ECH. Results: The mean levator tendon disinsertion was 5.47 mm ± 3.02 for the right eye and 5.99 mm ± 2.60 for the left. For univariate models, with the exception of the complaint of ptosis and eyelid function, all variables were statistically related to the amount of disinsertion of the upper eyelid levator tendon. For the multivariate model, when all variables were considered, only MRD1 and ECH were significantly associated with the amount of disinsertion. There was a statistical significant difference between the measures of UELMF before and after surgery with excursion decreasing a mean value of 1.1 mm after the procedure (p <0,001). Measures of MRD1 showed an increase in a mean of 1.6 mm and ECH decreased in a mean of 3.97 mm (p <0,001). We had found a significant correlation between both eyes for all eyelid propedeutic variables analyzed, both before and after surgery. Correlation of the propedeutic measures before surgery, between the two eyes, was stronger for the group without previous surgery. The same results for correlation was found for the amount of disinsertion (p <0.001). Conclusions: a) From the pre-operatory measures, MRD1 and ECH were the most important variables regarding association with the amount of UELM tendon disinsertion. A very important interaction was found between these two variables on the multivariable analysis model. b) Gender, age, diabetes, previous surgery, and presence of ectropion/entropion were associated with the amount of disinsertion but only on the univariable model of analysis. c) There was an increase on the measures of MRD1, ECH and UELMF decreased. d) Four patients had unilateral ptosis. Two of those patients presented UELM disinsertion on the eye without ptosis. (e) Eight patients had normal values for MRD1 in one or both eyes, from those, only one had no disinsertion

ASSUNTO(S)

blepharoptosis blefaroptose blefaroplastia blepharoplasty treatment outcome pálpebras

ACESSO AO ARTIGO

Documentos Relacionados