Abstract
The aim of this study is to compare the effects of parasacral and posterior Winnie approaches when combined with the inguinal paravascular approach for lumbar plexus block. After the approval of the Ethics Committee, 40 patients scheduled to undergo arthroscopic knee surgery were enrolled. The patients were randomly assigned into two groups in a double-blind manner to perform sciatic nerve block either by the parasacral technique (Group I) or by the posterior approach (Group II). The obturator nerve motor block success rate was found to be 80% (16/20) in Group I, whereas it was 10% (2/20) in Group II (p<0.05). Inguinal paravascular block with parasacral sciatic nerve block led to a much higher incidence of obturator nerve motor block when compared to the inguinal paravascular block with posterior sciatic nerve block during knee arthroscopies.
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