Quadratus Lumborum Block Versus Transversus Abdominis Block
75 patients around the world
Available in Brazil
: the sample will be divided into three groups and all participants will receive general
anesthesia. Patients in the placebo group (PG) will be referred to the post-anesthesia
recovery room after extubation and adequate hemodynamic and respiratory recovery. Patients in
the tap block group (TBG) will receive 0.2 ml of 0.25% levobupivacaine between the transverse
and oblique internal muscles guided by ultrasound (US), on one side and after the other (the
same dose), after the end of surgery. Patients in the quadratus lumborum group (LQG) will
receive 0.2 ml/kg of 0.25% levobupivacaine inside the middle layer of the thoracolumbar
fascia guided by US, on one side and after the other (the same dose), after the end of the
surgery. In all participants, the monitoring will include cardioscope, oximetry, non-invasive
blood pressure and monitor of hypnoses level. After peripheral venous puncture, antibiotic
prophylaxis with 2g cefazolin, and pre-anesthetic medication with midazolam 0.05 mg/kg. After
5 min pre-oxygenation, the patients will receive venous anesthetic induction with 2%
lidocaine 1mg/kg without vasoconstrictor; fentanyl 4 µ/kg; propofol 2 mg/kg, or even adequate
hypnosis guided by proper monitor; cisatracurium 0.15mg/kg, with tracheal intubation and
mechanical ventilation after anesthetic plan confirmed with proper monitor and adequate
muscle relaxation. Anesthesia will be maintained with propofol in continuous infusion guided
by hypnoses monitor and remifentanil in continuous infusion between 0.1 and 0.5 µg/kg/min,
according to patient need. All study participants will receive ondansetron 8 mg, dipyrone 2
g, ketoprofen 100 mg, dexamethasone 10 mg and morphine 3 mg. At the end of the surgery, after
partial recovery from neuromuscular blockade, patients will receive atropine 0.01 mg/kg and
neostigmine: 0.02mg/kg before tracheal extubation.