Comparison of the Effects of External Oblique Intercostal Plane Block and Subcostal Transversus Plane Block Methods With Ultrasound Guidance on Postoperative Analgesia in Laparoscopic Sleeve Gastrectomy Operations

The primary aim of this study was to investigate the effects of the external oblique intercostal plane block and the subcostal transversus abdominis plane block on postoperative pain scores and opioid consumption in patients undergoing laparoscopic sleeve gastrectomy.

Study Overview

• Status: Not yet recruiting
• Conditions: Sleeve Gastrectomy; External Oblique Intercostal Plane Block; Subcostal Transverse Abdominis Plane Block
• Intervention / Treatment: Procedure: Ultrasound-guided external oblique intercostal plane block; Procedure: Subcostal Transversus Abdominis Plane Block (s-TAP); Procedure: Local anesthetic infiltration

Detailed Description

Obesity is a global health problem currently treated with diet, pharmacotherapy, and bariatric surgery. Laparoscopic sleeve gastrectomy (LSG) is a common bariatric procedure that often results in moderate to severe postoperative pain. Adequate pain control after LSG is crucial for early mobilization and prevention of complications . As a relatively novel technique, the external oblique intercostal block (EOIB) provides analgesia for anterolateral upper abdominal surgery by blocking both the lateral and anterior cutaneous branches of the intercostal nerves between T6-7 and T10-11 . The subcostal transversus abdominis plane (s-TAP) block provides sensory blockade over nearly the entire anterior abdominal wall between T6 and T9. Therefore, it can be considered as part of multimodal analgesia for both laparotomy and laparoscopic abdominal surgical procedures.

The primary aim of this study was to investigate the effects of the external oblique intercostal block (EOIB) and the subcostal transversus abdominis plane (s-TAP) block on postoperative pain scores and opioid consumption in patients undergoing laparoscopic sleeve gastrectomy.

• Study Type: Interventional
• Enrollment (Estimated): 90
• Phase: Not Applicable

Contacts and Locations

• Study Contact: Name: MELİKE BOSTANCI ERKMEN, MD; Phone Number: +905355708530; Email: mlkbstnci@gmail.com
• Study Contact Backup: Name: Tolga Karaçay, MD; Phone Number: +905458718351; Email: tkaracay35@gmail.com

Study Locations

• Turkey (Türkiye)
  • Şanlıurfa
    • Sanliurfa, Şanlıurfa, Turkey (Türkiye), 63200
      • Sanliurfa Education and Research Hospital
      • Contact: Sanliurfa Education and Research Hospital bostancı erkmen, MD; Phone Number: +9005355708530; Email: mlkbstnci@gmail.com
      • Contact: melike bostancı erkmen, MD; Phone Number: +9005355708530; Email: mlkbstnci@gmail.com

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Adult patients aged between 18 and 65 years
• Patients classified as American Society of Anesthesiologists (ASA) physical status I-III

Exclusion Criteria:

• Patients younger than 18 years or older than 65 years
• Inability to cooperate or comply with study procedures
• Liver and kidney failure
• American Society of Anesthesiologists (ASA) IV-V patient
• External oblique intercostal block(EOİB) and the Subcostal Transversus Abdominis Plane block(s-TAB) are contraindicated

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Double

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: External Oblique Intercostal Block; patient receive block that External Oblique Intercostal Blcok	Procedure: Ultrasound-guided external oblique intercostal plane block; Ultrasound-guided external oblique intercostal plane block will be performed at the T6 level using 20 ml of 0.25% bupivacaine at the Immediately after intubation
Experimental: Subcostal Transversus Abdominis Plane Block (s-TAP); Patient receive that OSTAP	Procedure: Subcostal Transversus Abdominis Plane Block (s-TAP); Ultrasound-guided OSTAP block will be performed using 20 ml of 0.25% bupivacaine immediately after intubation.
Experimental: Local anesthetic infiltration; Surgeon implement local anesthetic to port site	Procedure: Local anesthetic infiltration; Port-site local anesthetic infiltration will be performed with bupivacain after intubation by surgeon.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Postoperative Acute Pain Scores	Postoperative acute pain scores assingment with Visual Analog Scores	postoperative T1: 0. hours, T2:4.hours,T3:12.hours,T4: 24.hours

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Total Opioid Consumption	We plan to investigate the effects of the external oblique intercostal block and the subcostal transversus abdominis plane block onopioid consumption in patients undergoing laparoscopic sleeve gastrectomy after surgery.	POSTOPERATİVE T1:0 HOURS T2:4. HOURS T3:12.HOURS T4:24.HOURS
PATIENT SATISFACTION (Likert Scale) Not satisfied at all 1 Slightly satisfied 2 Moderately satisfied3 Satisfied4 Excellent5 SURGEON SATISFACTION (Likert Scale) Not satisfied at all 1 Slightly satisfied 2 Moderately satisfied3 Satisfied4 Excellent5	Secondary outcomes will include patient- and surgeon-based Likert scale assessments.	Postoperative 24.hours
Postoperative Nause and Vomiting		Postoperative first 24.hours

Collaborators and Investigators

• Sponsor: Sanliurfa Education and Research Hospital
• Investigators: Principal Investigator: Melike Bostancı Erkmen, M.D., Sanliurfa Education and Research Hospital; Principal Investigator: Tolga Karaçay, M.D., Sanliurfa Education and Research Hospital; Principal Investigator: Servet Sürmeli, M.D., Sanliurfa Education and Research Hospital

Study record dates

Study Major Dates

• Study Start (Estimated): April 1, 2026
• Primary Completion (Estimated): April 1, 2027
• Study Completion (Estimated): May 1, 2027

Study Registration Dates

• First Submitted: March 25, 2026
• First Submitted That Met QC Criteria: April 20, 2026
• First Posted (Actual): April 23, 2026

Study Record Updates

• Last Update Posted (Actual): April 23, 2026
• Last Update Submitted That Met QC Criteria: April 20, 2026
• Last Verified: April 1, 2026

More Information

Terms related to this study

• Keywords: Ultrasound guided · External oblique intercostal plane block · Sleeve gastrectomy Bariatric surgery Postoperative · Analgesia
• Other Study ID Numbers: SanliurfaERH-ANESTEZİ-MBE-01

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO
• IPD Plan Description: No Ethics committee approval covers only aggregate data analysis; there is no permission to share individual participant data.

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No