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Year : 2020  |  Volume : 14  |  Issue : 2  |  Page : 233-238

Ultrasound-guided anterior quadratus lumborum block for postoperative pain after laparoscopic pyeloplasty: A randomized controlled trial

1 Department of Anaesthesiology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
2 Department of Emergency Medicine, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
3 Department of Nephrology, DR. RML IMS, Lucknow, Uttar Pradesh, India
4 Department of Biostatistics and Health Informatics, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India

Correspondence Address:
Dr. Ruchi Verma
Department of Anaesthesiology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Raebarelli Road, Lucknow, Uttar Pradesh
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/aer.AER_45_20

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Background: Quadratus lumborum block (QLB) has provided adequate analgesia and lowered postoperative opioid requirement in comparison to controls for some urological surgeries. Aims: The aim of this study was to assess the efficacy of postprocedure ultrasound-guided QLB in comparison to port-site infiltrations with local anesthetics (as control) in lowering postoperative pain after laparoscopic pyeloplasty. Settings and Design: This was a prospective, single-blinded, randomized controlled trial. Materials and Methods: Fifty-three adults undergoing laparoscopic pyeloplasty were randomly allocated to either anterior QLB group (n = 27) or port-site infiltration Group P (n = 26) with 20 mL of 0.5% ropivacaine. The primary outcomes were static and dynamic pain on the Visual Analog Scale (VAS) of 0–100 at the 30th min, 2nd, 6th, 12th, and 24th hour after surgery. The secondary outcomes were number of patients requiring rescue analgesics and having postoperative nausea or vomiting (PONV) in 24 hours after surgery. Statistical Analysis: Intergroup comparison of VAS was done with Student's t-test. Categorical data were analyzed using the Chi-square test. Results: The static VAS scores were found to be significantly lower in QLB group at the 2nd, 6th, and 12th hour, and the dynamic VAS was lower at all time points after the 30th min in the QLB group. The number of patients requiring rescue analgesics were significantly lower in the QLB group (13 as compared to 21 in Group P; P = 0.015). The incidence of PONV was comparable. No other side effects were seen. Conclusion: Ultrasound-guided anterior QLB is more effective in comparison to traditional technique of port-site local anesthetic infiltration for providing analgesia after laparoscopic pyeloplasty.

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