Perioperative Effects of Lateral Quadratus Lumborum Block in Percutaneous Transhepatic Cholangiography

Preoperatively, 2 mg intravenous midazolam was administered to the patients. Intravenous 0.5 mg/kg propofol and 0.5 mcg/kg fentanyl were used for induction. Intravenous 0.5-1 mg/kg propofol was administered to provide an intraoperative bispectral index of 40-60, and when the Vizel analog score was \>4, intravenous 0.1-1 mcg/kg remifentanil was administered.

Before the procedure, the patient was placed in the left lateral position and a Quadratus Lumborum Block was applied at the thoracic 8-10 level. A total of 20 cc blocking fluid consisting of 14 cc of 0.5% bupivacaine and 6 cc of 2% lidocaine was used for the block. A minimum of 30 minutes was waited after the block. 2 mg of intravenous midazolam was administered before being taken to the operating room. Intravenous 0.5 mg/kg propofol and 0.5 mcg/kg fentanyl were used for induction. Intravenous 0.5-1 mg/kg propofol was administered to provide an intraoperative bispectral index of 40-60, and intravenous 0.1-1 mcg/kg remifentanil was administered when the Vizel analog score was \>4.