Microelectrode-guided thalamotomy for XXXX .

@entity1 @entity400 @entity191
OBJECTIVE: To describe the outcomes in our first 40 microelectrode-guided thalamotomies for parkinsonian @entity400 . METHODS: Twenty-four left-sided and 16 right-sided thalamotomies were performed between October 1984 and January 1996; the mean follow-up period was 35.8 months (range, 1-152 mo). The results were evaluated retrospectively and semiquantitatively by a disinterested observer (MNL) and correlated with the quality of the microelectrode recording and the number and size of radiofrequency lesions made. The first 20 and second 20 procedures were evaluated separately. RESULTS: At the last follow-up, the Unified @entity191 Rating Scale showed no or virtually no @entity400 in the upper limb in 75% of @entity1 or in the lower limb in 73% of @entity1 . No significant persistent complications were found. These results were achieved at the expense of having to repeat the procedure on 11 sides (in 5 because of technical problems and in 6 for no obvious reason). Total or nearly total abolition of @entity400 occurred after the first procedure in 40% of the first 20 operations and in 65% of the second 20. Eight of the first 20 procedures and 2 of the second 20 failed for technical reasons. Lesions were made larger in the second 20 procedures than in the first 20. With the use of an electrode with a 1.1 x 3-mm bare tip for 60 seconds, it seems that lesions had to be created at 60 degrees C or more to produce a successful result. CONCLUSION: Thalamotomy with microelectrode recording is an effective procedure with which to treat @entity400 in @entity1 with @entity191 and may involve fewer complications than conventional techniques. The procedure appears to involve a learning curve.
