External Oblique Intercostal Block in Laparoscopic Cholecystectomy

Ondokuz Mayıs University

Status: Enrolling

Conditions: Pain, Acute; Pain, Postoperative; Opioid Use

Treatments: Procedure: External Oblique Intercostal Block; Drug: ıv morphine PCA; Procedure: Port-Site Infiltration

Study type: Interventional

Funder types: Other

Identifiers

NCT07164664

EOIBLIALC2025

Details and patient eligibility

About

Adequate postoperative pain management is essential for improving patient comfort and recovery after laparoscopic cholecystectomy. This study evaluated the effectiveness of the external oblique intercostal block compared with port-site infiltration in terms of pain scores and opioid consumption during the first 24 hours after surgery.

Full description

Adequate pain relief in the postoperative period is a crucial determinant of patient comfort, early mobilization, and overall recovery after laparoscopic cholecystectomy. Effective analgesia not only improves patient satisfaction but also reduces postoperative complications, facilitates respiratory function, and shortens hospital stay. Conversely, insufficient pain control may lead to undesirable outcomes such as delayed mobilization, nausea, vomiting, increased opioid requirements, and prolonged recovery.

Regional anesthesia techniques, particularly abdominal wall and fascial plane blocks, have gained increasing attention as part of multimodal analgesia strategies aimed at reducing opioid consumption and minimizing related adverse effects. Among these, the external oblique intercostal block (EOIB) has recently been described as a novel regional technique that may provide effective postoperative pain relief.

In clinical practice, port-site infiltration with local anesthetics is a commonly used and simple technique for providing postoperative analgesia in laparoscopic procedures, although its effectiveness may be limited.

The present study was designed to compare the effectiveness of the external oblique intercostal block with port-site infiltration in patients undergoing laparoscopic cholecystectomy, with a focus on postoperative pain scores and opioid consumption during the first 24 hours after surgery.

Enrollment: 60 estimated patients

Sex: All

Ages: 18 to 75 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Patients aged 18-75 undergoing elective Laparoscopic Cholecystectomy
• American Society of Anesthesiologists (ASA)classification I-III patients.
• Patients who can use PCA.
• Patients who will sign the informed consent form.

Exclusion criteria

• They will refuse to participate.
• They will have a body mass index (BMI) greater than 35 kg/m2.
• They will have contraindications to peripheral nerve blocks (e.g., coagulopathy, abnormal INR, thrombocytopenia, local or systemic infection).
• They will have clinically significant cardiovascular or cerebrovascular disease.
• They will have severe hepatic, renal, or respiratory dysfunction. They will have known drug allergies.
• They will have a history of substance abuse.
• They will have chronic opioid use, defined as regular use of ≥15 mg oral morphine equivalent per day for at least 30 consecutive days within the past 3 months.
• They will have chronic pain syndromes (e.g., fibromyalgia, diabetic neuropathy, or chronic low back pain).
• They will have neuropsychiatric disorders or cognitive impairment that precludes effective communication with the investigators.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Quadruple Blind

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60 participants in 2 patient groups

Group EOIB

Active Comparator group

Description:

A bilateral External Oblique Intercostal Block (30 ml, %0.25 bupivacaine, bilaterally) + IV morphine patient-controlled analgesia (PCA)

Treatment:

Drug: ıv morphine PCA

Procedure: External Oblique Intercostal Block

Group PSI

Active Comparator group

Description:

Port sites injection (5 mL at each port site, 0.25% bupivacaine solution ) + IV morphine patient-controlled analgesia (PCA)

Treatment:

Procedure: Port-Site Infiltration

Drug: ıv morphine PCA