NCT07101835

EOIB for Laparoscopic Sleeve Gastrectomy

Extent of Sensory Blockade After External Oblique Intercostal Block for Postoperative Analgesia in Laparoscopic Sleeve Gastrectomy

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 20 (actual)
• Sponsor: Ondokuz Mayıs University · Academic / Other
• Sex: All
• Age: 18 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

n obese patients, adequate pain relief in the postoperative period is a crucial parameter that affects patient comfort and hospital stay. Improving patient comfort and recovery quality can be achieved by minimizing undesirable effects such as nausea, vomiting, and inadequate analgesia. This study aimed to evaluate the impact of the external oblique intercostal block on postoperative dermatomal distribution, acute pain scores, and opioid consumption during the first 24 hours after laparoscopic sleeve gastrectomy surgery.

Detailed description

In this observational study, patients undergoing laparoscopic sleeve gastrectomy who received either superficial or deep parasternal intercostal plane blocks were evaluated for sensory distribution. Sensory assessment was conducted by a blinded investigator 30 minutes after block administration. Cold sensation testing was performed using small ice tubes applied to the abdominal wall. Sensations were categorized as Normal, Reduced, or No cold. A successful block was defined as the loss or reduction of cold sensitivity within the expected dermatomal distribution, whereas a normal cold sensation was considered block failure. Assessments began at the midline, including the epigastric region and trocar insertion sites, and progressed laterally toward the anterior axillary line. The extent of sensory coverage was recorded on the skin surface, and marked dermatomal areas were subsequently subjected to digital analysis. To evaluate block duration, regression of sensory changes was reassessed at 12 and 24 hours postoperatively using the same cold sensation criteria.

Conditions

• Acute Pain
• Regional Anesthesia
• Morbid Obesity

Interventions

Type	Name	Description
PROCEDURE	Bilateral ultrasound guided external oblique intercostal block (EOIB)	Bilateral ultrasound-guided EOIB (total of 60 ml, %0.25 bupivacaine) will be performed + IV morphine PCA Patients scheduled for LSG will receive a Bilateral ultrasound guided external oblique intercostal block (EOIB) preoperatively, and sensory block status will be evaluated after 30 minutes.
DRUG	ıv morphine PCA	ıV PCA of 0,5mg/ml morphine (the bolus dose is 20 μg/kg, the lock-in time of 6-10 minutes, the 4-hour limit is adjusted to be 80% of the calculated total amount).

Timeline

• Start date: 2025-08-01
• Primary completion: 2025-11-01
• Completion: 2025-12-15
• First posted: 2025-08-03
• Last updated: 2025-12-23

Locations

1 site across 1 country: Turkey (Türkiye)