 The transversus abdominis plane block TAP block is an effective method of postoperative pain management after cesarean section C-section. Up to now, there are no data available about bupivacaine BPV plasma levels after TAP block in adults. In the current study, the investigators aimed to assess BPV pharmacokinetic parameters after ultrasound-guided TAP block using BPV in parturients undergoing C-section and to report its effects on corrected QT interval. 