Laparoscopic Sleeve Gastrectomy Surgery and External Oblique Intercostal Block

Not Applicable

Completed

• Conditions: Regional Anesthesia; Postoperative Pain; Morbid Obesity; Anesthesia
• Interventions: Other: Control; Procedure: Bilateral ultrasound guided external oblique intercostal block (EOIB)

• Registration Number: NCT05822479
• Lead Sponsor: Ondokuz Mayıs University

Brief Summary

In obese patients, adequate pain relief in the postoperative period is an important parameter that affects patient comfort and hospital stay. Increasing patient comfort and recovery quality can be achieved by avoiding undesirable effects such as nausea, vomiting, and analgesia. This study aimed to evaluate the impact of the external oblique intercostal block postoperative acute pain scores and opioid consumption in the first 24 hours after laparoscopic sleeve gastrectomy surgery.

Detailed Description

Adequate pain control in laparoscopic surgeries is associated with reduced postoperative opioid administration, faster mobilization, faster recovery, and shorter hospital stays. Intraoperative nerve blocks using local anesthetics have been shown to improve postoperative pain in various abdominal surgeries, both open and laparoscopic. Laparoscopic bariatric procedures are most often associated with moderate to severe visceral pain from surgical manipulation of the stomach and intestine. Combined regional and general anesthesia reduces surgical stress responses by interrupting pain transmission signals, which facilitates pain control, reduces opioid consumption, and improves patient postoperative satisfaction. Ultrasound-guided fascial plane blocks have been rapidly included in regional anesthesia applications as an alternative to neuraxial techniques in recent years and include injection into a tissue plane to provide analgesia in various anatomical areas. The external oblique intercostal block (EOIB) represents an essential modification of the fascial plane block techniques that can consistently cover the upper lateral abdominal wall. The EOIB block has easily identifiable sonographic points.

The study aims to investigate the effects of the EOIB on postoperative pain in morbidly obese patients who will undergo laparoscopic sleeve gastrectomy by comparing it with the control group. It is seen that there are not enough studies on EOIB in the literature. Our study, which the investigators think will contribute to the literature, was planned as a prospective, randomized, controlled, single-blind, parallel-group study.

Patients will be divided into two groups:

Group EOIB :

A bilateral EOIB (60 ml 0.25% bupivacaine + 1:400.000 adrenaline) will be performed. In addition, IV morphine-PCA will be applied postoperatively for 24 hours.

Group Control:

Patients in this group will not receive any block. IV morphine-PCA will be applied postoperatively for 24 hours.

Study Timeline

• Study First Submitted: 2023-04-10
• Study First Submitted QC: 2023-04-10
• Study Start: 2023-04-20
• Study First Posted: 2023-04-20
• Primary Completion: 2023-12-20
• Status Verified: 2024-05
• Study Completion: 2024-05-30
• Last Update Submitted: 2024-07-02
• Last Update Posted: 2024-07-03

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 60

Inclusion Criteria

1. Age between18-65 years
2. American Society of Anesthesiology score II-III
3. Body mass index (BMI) > 35 kg/m2
4. Patients who will sign the informed consent form

Exclusion Criteria

1. Patients with drug allergies (Opioids, NSAIDs, local anesthetics)
2. Patients with neuro-psychiatric disease, cognitive impairment, inability to communicate, or a history of drug addiction
3. Presence of any systemic infection or at the injection site
4. Patients taking anticoagulants or having any bleeding disorder (Coagulopathy, International Normalized Ratio (INR) value not within normal limits, thrombocytopenia or platelet dysfunction)
5. Patients with significant cardiovascular, hepatic, renal or endocrine disorders
6. Patients with a history of chronic pain syndromes or receiving chronic pain treatment and a history of opioid use for more than four weeks in the preoperative period
7. Patients using continuous positive airway pressure device due to obstructive sleep apnea syndrome (OSAS) (symptoms detected by polysomnography and apnea-hypopnea index (AHI) >5/hour)
8. Patients with chronic obstructive pulmonary disease
9. Patients who need intensive care unit after surgery
10. Patients who do not consent/do not want to participate

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Group Control	Control	IV morphine PCA
Group EOIB	Bilateral ultrasound guided external oblique intercostal block (EOIB)	A bilateral EOIB (60 ml, %0.25 bupivacaine, totally) + IV morphine patient-controlled analgesia (PCA)

Primary Outcome Measures

Name	Time	Method
Cumulative opioid consumption in the first 24 hours after surgery	postoperative day 1	Cumulative opioid consumption in the first 24 hours after surgery will be measured. Patients can request opioids via a PCA device when their NRS score is ≥4. In cases where rescue analgesia is required (NRS score ≥4), 25 mg IV meperidine was administered in the recovery unit, and 50 mg IM meperidine was administered in the ward.

Secondary Outcome Measures

Name	Time	Method
Intraoperative remifentanil consumption	The remifentanil consumption will be recorded from anesthesia induction until the patient is referred to the recovery unit, up to 150 minutes.	The total amount of remifentanil consumed will be recorded.
The number of patients with complications	Postoperative 7 days on an average	The number of patients has any complications -directly related to the block or the drug used in the block- will be recorded
The heart rate measurement	The heart rate was recorded preoperatively, one minute after the induction, and every 15-30 minutes until the patient was referred to the recovery unit, up to 180 minutes.	The heart rate was recorded preoperatively, one minute after the induction, and every 15-30 minutes until the patient was referred to the recovery unit.
The scores of postoperative nausea and vomiting (PONV) and the number of patients requiring postoperative antiemetics.	postoperative day 1	The severity of postoperative nausea and vomiting (PONV) will be assessed using a descriptive verbal rating scale at 0, 3, 6, 12, 18, and 24 hours after extubation. For PONV prophylaxis, patients will be routinely administered 8 mg IV dexamethasone before induction and 0.15 mg/kg (IVA) IV ondansetron 20 minutes before the end of the procedure. If a score of 3 or more is recorded, 4 mg IV ondansetron will be administered and repeated after 4 hours if required. Despite the administration of ondansetron, if the score is ≥3, the patients will be administered 10 mg IV metoclopramide diluted in 100 ml saline solution as an IV infusion. The number of patients who receive antiemetic treatment will be recorded. The PONV scale is 0 = no nausea; 1 = slight nausea; 2 = moderate nausea; 3 = vomiting once; and 4 = vomiting more than once.
Patients' satisfaction and quality of pain management	postoperative day 1	Patients' pain management satisfaction and quality will be evaluated using the Revised American Pain Society Patient Outcome Questionnaire (APS-POQ-R) -Turkish Version.
The mean arterial pressure measurement	The mean arterial pressure was recorded preoperatively, one minute after the induction, and every 15-30 minutes until the patient was referred to the recovery unit, up to 180 minutes.	The mean arterial pressure was recorded preoperatively, one minute after the induction, and every 15-30 minutes until the patient was referred to the recovery unit.
Cumulative opioid consumption in the first 12 hours after surgery	postoperative day 1	Cumulative opioid consumption in the first 12 hours after surgery will be measured. Patients can request opioids via a PCA device when their NRS score is ≥4 and 25 mg IV meperidine was administered in the recovery unit, and 50 mg IM meperidine was administered in the ward.
Postoperative pain scores	postoperative day 1	Pain status at rest and while activity will be assessed by NRS score at 0, 3, 6, 12, 18, and 24 hours after surgery. The NRS is an 11-point numeric scale that ranges from 0 to 10.
The number of patients who required rescue analgesia.	postoperative day 1	The number of patients requiring rescue analgesics will be recorded over 24 hours.
Time of first analgesic request	postoperative day 1	Time at which the first analgesic is requested

Trial Locations

Locations (1)

Ondokuz Mayis Universitesi; 🇹🇷 Samsun, Atakum, Turkey