Original articleModified transposition procedure of the vertical recti in sixth nerve palsy
Section snippets
Methods
Since 1994, we have performed a modified transposition procedure of parts of the vertical recti in cases of severe abduction deficits in sixth nerve palsy. In order to analyze the efficacy of this surgical procedure, we compared perioperative parameters and postoperative results of this modified transposition procedure performed between 1994 and 1999 with the operation results from 1989 to 1994, which were conducted as classic transpositions of the Hummelsheim type. The records of 78 patients
Results
Both in the group of patients who underwent transposition of the classical Hummelsheim type (group 1) and in the group who received modified transposition (group 2), the cause of the sixth nerve palsies was related to trauma in the majority of cases, to vascular malformations or hemorrhages in the second greatest number of cases, and to tumors in the smallest number of cases. In both groups there was a slight overrepresentation of men (group 1, seven men and five women; group 2, nine men and
Discussion
The aim of the study was to compare the efficacy and handling of a modified transposition procedure in severely limited abduction with the classic Hummelsheim procedure. There is no gross disadvantage in the modified technique. On the contrary, there seems to be a slight advantage in the modification.
As to functional results, that is, improvement of abductive capacity and reduction of convergent squint, the modification was as effective as the classic procedure. The fact that there was no
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