Ultrasound-guided transversalis fascia plane block or transversus abdominis plane block for recovery after caesarean section A randomised clinical trial

BACKGROUND Caesarean section is a widely performed surgical procedure that often results in moderate-to-severe postoperative pain. If left untreated, this pain can lead to short-term and long-term consequences. Transversalis fascia plane (TFP) block and transversus abdominis plane (TAP) block are among the regional anaesthesia techniques employed for managing pain after a caesarean section. OBJECTIVE We aimed to compare the impact of these two blocks on the quality of recovery in patients undergoing elective caesarean section under spinal anaesthesia. DESIGN A single-centre, double-blind, randomised trial. SETTINGS Operating room, postanaesthesia recovery unit, and ward in a tertiary hospital. PARTICIPANTS Ninety-three patients (ASA 2 to 3) were recruited. After exclusion, 79 patients were included in the final analysis: 40 in the TFP block group and 39 in the TAP block group. INTERVENTIONS After surgery, participants received either TFP block (20 ml 0.25% bupivacaine for each side) or TAP block (20 ml 0.25% bupivacaine for each side). MAIN OUTCOME MEASURES The primary outcome was the difference in obstetric quality of recovery 11-Turkish (ObsQoR-11T) scores between groups. Secondary outcomes included pain scores, opioid consumption and incidence of opioid-related complications. RESULTS The mean ObsQoR-11T score was higher in the TFP block group compared with the TAP block group (97.13 +/- 6.67 points vs. 87.10 +/- 9.84 points, respectively; P < 0.001). The pain scores in the TFP block group were slightly lower between postoperative 4 and 24 h. The mean total morphine consumption was 15.08 +/- 2.21 mg in the TFP block group and 22.21 +/- 3.04 mg in the TAP block group (P < 0.001). More patients required rescue analgesia between 4 and 8 h in the TAP block group [2.00 (5.00%) vs. 9.00 (23.08%), P = 0.02]. No significant differences were observed between groups in terms of opioid-related side effects. CONCLUSIONTFP block used for analgesic purposes yielded a better quality recovery period than TAP block and also reduced opioid consumption.