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Rectus Sheath Block Versus Transversus Abdominis Plane Block for Analgesia in Laparoscopic Bariatric Surgery

NCT07592091 · Status: NOT_YET_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 96

Last updated 2026-05-18

No results posted yet for this study

Summary

This randomized controlled trial aims to compare the analgesic efficacy of rectus sheath block (RSB) and transversus abdominis plane block (TAPB) in patients undergoing laparoscopic bariatric surgery. Both techniques are regional anesthesia methods used as part of multimodal analgesia to reduce postoperative pain and opioid requirements.

Eligible participants will be randomly assigned to receive either a RSB or a TAPB after general anesthesia. Postoperative pain scores, opioid consumption, recovery outcomes, area of sensory loss, time to first rescue analgesia, and block-related adverse events will be assessed and compared between the two groups.

This study will help determine which regional anesthesia technique provides more effective postoperative analgesia for laparoscopic bariatric surgery

Conditions

  • Rectus Sheath Block
  • Transverse Abdominis Plane Block
  • Opioid Consumption, Postoperative
  • Analgesia

Interventions

PROCEDURE

Rectus Sheath Block

Bilateral rectus sheath block will be performed by an anesthesiologist experienced in ultrasound-guided regional anesthesia. The ultrasound probe will be positioned at the midpoint between the xiphoid process and the umbilicus along the mid-clavicular line. After aseptic preparation of the puncture site and ultrasound probe, a needle will be advanced using an in-plane, lateral-to-medial approach under continuous ultrasound guidance. After correct needle-tip placement between the rectus abdominis muscle and the posterior rectus sheath, 30 mL of 0.25% bupivacaine with epinephrine 5 µg/mL will be injected on each side after negative aspiration. Local anesthetic spread will be monitored in real time, and the procedure will be repeated on the contralateral side using the same technique.

PROCEDURE

Transversus Abdominis Plane Block

Bilateral transversus abdominis plane block will be performed by an anesthesiologist experienced in ultrasound-guided regional anesthesia. The ultrasound probe will be placed on the lateral abdominal wall between the costal margin and iliac crest at the mid-axillary line. Depth, frequency, and gain will be adjusted to clearly visualize the fascial plane between the internal oblique and transversus abdominis muscles. After aseptic preparation of the puncture site and ultrasound probe, a needle will be advanced using an in-plane approach under continuous ultrasound guidance. After correct needle-tip placement in the transversus abdominis plane, 30 mL of 0.25% bupivacaine with epinephrine 5 µg/mL will be injected on each side after negative aspiration. Local anesthetic spread within the fascial plane will be monitored in real time, and the procedure will be repeated on the contralateral side using the same technique.

Sponsors & Collaborators

  • Chiang Mai University

    lead OTHER

Principal Investigators

  • Kittitorn Supphapipat, MD · Department of Anesthesiology, Faculty of Medicine, Chiang Mai University

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Model
PARALLEL

Eligibility

Min Age
20 Years
Max Age
60 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2026-05-10
Primary Completion
2030-12-31
Completion
2031-06-30

Countries

  • Thailand

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07592091 on ClinicalTrials.gov