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Intertransverse Process Block Versus External Oblique Intercostal Plane Block After Laparoscopic Sleeve Gastrectomy

NCT07591116 · Status: NOT_YET_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 60

Last updated 2026-05-15

No results posted yet for this study

Summary

This randomized clinical trial aims to evaluate and compare the analgesic efficacy of the Intertransverse Process Block (ITPB) and the Subcostal External Oblique Intercostal Plane Block (EOIPB) in patients undergoing laparoscopic sleeve gastrectomy. The primary outcome is the Visual Analog Scale (VAS) score within the first 24 hours after surgery. Secondary outcomes include total opioid consumption, requirement for rescue analgesia, block-related complications and adverse effects (hematoma, pneumothorax, local anesthetic systemic complications, vascular puncture, and infection), patient satisfaction assessed using a Likert scale, quality of recovery assessed using the QoR-15 questionnaire, and incidence of postoperative nausea and vomiting.

Conditions

  • Intertransverse Process Block
  • External Oblique Intercostal Plane Block
  • Sleeve Gastrectomy
  • Regional Anaesthesia
  • Postoperative Pain

Interventions

PROCEDURE

Intertransverse Process Block

Ultrasound System, Model DC-T6) will be positioned along the medial border of spinous processes level of the T7/T8 thoracic vertebrae. Anatomical landmarks, including the erector spinae muscle, transverse processes, and superior costotransverse ligament complex at the T7/T8 level, will be identified. Using an in-plane approach, a 21 G 0.8x100 mm echogenic insulated needle will be inserted through the erector spinae muscle toward the intertransverse tissue complex located between the superior costotransverse ligament and the transverse processes. Proper needle placement will be confirmed with the injection of 1-2 mL isotonic saline demonstrating separation within the intertransverse plane. Upon confirmation and negative aspiration, 20 mL of 0.25% bupivacaine hydrochloride will be administered on each side under ultrasound guidance.

PROCEDURE

External Oblique Intercostal Plane Block

After skin disinfection with chlorhexidine, the skin and subcutaneous tissues will be anesthetized using 2-4 mL of 1% lidocaine. A linear ultrasound probe will be positioned in a sagittal orientation along the midaxillary line at the level of the sixth rib. Anatomical landmarks, including the external oblique muscle, intercostal muscles, and ribs will be identified. Using an in-plane approach, a 21G 0.8×100 mm echogenic insulated needle will be inserted into the fascial plane between the external oblique muscle and the intercostal muscles. Proper needle placement will be confirmed with the injection of 1-2 mL isotonic saline. Upon confirmation and negative aspiration, 20 mL of 0.25% bupivacaine hydrochloride will be administered on each side under ultrasound guidance.

Sponsors & Collaborators

  • Antalya City Hospital

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
65 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2026-12-15
Primary Completion
2027-11-30
Completion
2027-12-30

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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 NCT07591116 on ClinicalTrials.gov