There is limited information on using the ultrasonography for block placement concerning lipoma excision. A new type of regional blockade, performed under ultrasound, can ensure proper block placement with accurate local anesthetics deposition. Investigators hypothesized that ultrasound guidance can reduce the number of needle passes to complete the block placement. Investigators will compare namely ultrasound guided regional blockade and traditional method regarding the number of needle passes to complete the block placement.
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The number of needle attempts needed to complete the block placement. New attempt will be defined as needle reinsertions through separate skin puncture.
Timeframe: 10 - 20 minutes