EOIB for Laparoscopic Sleeve Gastrectomy

NCT ID: NCT07101835

Last Updated: 2025-12-23

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 20 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2025-08-01
• Study Completion Date: 2025-12-15

Brief 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

Keywords

external oblique intercostal block; acute pain

Study Design

• Observational Model Type: CASE_ONLY
• Study Time Perspective: PROSPECTIVE

Study Groups

Group EOIB

bilateral EOIB (60 ml, %0.25 bupivacaine, totally) + IV morphine patient-controlled analgesia (PCA)

Bilateral ultrasound guided external oblique intercostal block (EOIB)

Intervention Type: PROCEDURE

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.

ıv morphine PCA

Intervention Type: DRUG

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).

Interventions

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.

Intervention Type: PROCEDURE

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).

Intervention Type: DRUG

Other Intervention Names

EOIB; morphine PCA

Eligibility Criteria

Inclusion Criteria

• 18-65 years

Exclusion Criteria

• Patients who did not sign the informed consent form and did not wish to participate in the study
• Patients with a history of opioid use lasting longer than four weeks
• Patients with chronic pain
• Patients with a history of allergy or hypersensitivity to local anesthetics or opioids
• Presence of severe cardiac, hepatic, or renal disease
• Patients with alcohol or drug addiction
• Conditions contraindicating the application of regional anesthesia
• Patients with severe psychiatric disorders such as psychosis or dementia that limit cooperation
• Block failure identified by dermatomal examination after the procedure
• Patients with a STOP-BANG score > 5

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Ondokuz Mayıs University

OTHER

Sponsor Role: lead

Responsible Party

Esra Turunc

assistant professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Ondokuz Mayis University

Samsun, , Turkey (Türkiye)

Countries

Turkey (Türkiye)

Other Identifiers

EOIBLSG

Identifier Type: -

Identifier Source: org_study_id