Quadratus Lumborum Block Versus Transversus Abdominis Block

University of Sao Paulo General Hospital

Status: Not yet enrolling

Conditions: Postoperative Pain

Treatments: Other: Quadratus lumborum block; Other: General anesthesia; Other: Transverse abdominal block

Study type: Interventional

Funder types: Other

Identifiers

NCT04367233

CAAE 28763119.0.0000.5448

Details and patient eligibility

About

The advent of laparotomy replacement by minimally invasive techniques brought the obvious benefit of postoperative pain reduction. The application of transversus abdominis block has already demonstrated to reduce postoperative pain in laparoscopic hysterectomy. The comparison between it and quadratus lumborum block in cesarean sections showed that the latter was superior in relation to postoperative analgesia. The aim of this trial is to compare postoperative analgesia in patients receiving one or the other of these regional anesthesia techniques to prevent postoperative pain in gynecological laparoscopic surgeries. The recruited sample will be randomly distributed in three groups to receive placebo, transverse abdominal plan block or quadratus lumborum block, in a covert way for the patients and team. The primary outcome evaluated will be the postoperative consumption of opioid and the secondary outcome will be the evaluation of postoperative pain scores.

Full description

: 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% ropivacaine 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% ropivacaine 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.

Enrollment: 75 estimated patients

Sex: All

Ages: 16 to 70 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Scheduled to gynecological video laparoscopy.

Exclusion criteria

• Allergy to any component of the study protocol, coagulopathies.

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Quadruple Blind

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75 participants in 3 patient groups

Placebo group

Active Comparator group

Description:

General anesthesia with fentanyl, propofol and remifentanyl

Treatment:

Other: General anesthesia

Transverse block group

Experimental group

Description:

At the end of general anesthesia with fentanyl, propofol and remifentanil, the patient will receive transverse plan block, with ropivacaine 0,25% 0,2 ml/kg.

Treatment:

Other: Transverse abdominal block

Quadratus lumborum group

Experimental group

Description:

At the end of general anesthesia with fentanyl, propofol and remifentanil, the patient will receive quadratus lumborum block with ropivacaine 0,25% 0,2 ml/kg.

Treatment:

Other: Quadratus lumborum block