An interventional study of Erector Spinae Plane (ESP) Block in Postoperative Pain, Laparoscopic Cholecystectomy and Anesthesia, Regional, sponsored by Harran University. Completed at 1 site in Turkey (Türkiye). Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2026-02-27.
Sponsored by Harran University · Not applicable, Interventional, and Treatment
This randomized clinical study aims to compare the postoperative analgesic efficacy, analgesic consumption, and patient satisfaction of erector spinae plane (ESP) block administered in three different patient positions-lateral, prone, and sitting-in individuals undergoing elective laparoscopic cholecystectomy. The study also evaluates the variation in skin-to-block site distance depending on patient positioning.
Erector spinae plane (ESP) block is a relatively recent regional anesthesia technique performed under ultrasound guidance, widely used for managing acute postoperative pain. While the ESP block is known for its safety, simplicity, and versatility, there is limited evidence regarding the influence of patient positioning on its clinical effectiveness and technical performance.
This prospective, randomized, single-blind study investigates the impact of administering bilateral ESP block at the T7 vertebral level in three different patient positions: lateral decubitus, prone, and sitting. The study includes adult patients (aged 18-65, ASA I-II) undergoing elective laparoscopic cholecystectomy under general anesthesia.
Primary outcomes include postoperative pain scores (VAS and NRS). Secondary outcomes include total rescue analgesic consumption (tramadol), time to first analgesic requirement, patient satisfaction scores (Likert scale), and measurement of the skin-to-block site distance across different positions. Data will be collected at defined intervals up to 24 hours postoperatively.
The findings are expected to inform clinicians on the optimal patient positioning for ESP block to enhance block efficacy and patient comfort during laparoscopic abdominal surgery.
5,093 studies on the registry are indexed under Pain, Postoperative; 1,140 are open to participants now.
This study's enrollment of 120 is above the median of 75 across 4,344 interventional studies indexed under Pain, Postoperative.
Browse Pain, Postoperative studies →Harran University is the lead sponsor of 60 studies on the registry; 21 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
Patients in this group will receive bilateral erector spinae plane (ESP) block at the T7 level in the lateral decubitus position under ultrasound guidance before laparoscopic cholecystectomy.
Procedure: Erector Spinae Plane (ESP) Block
Patients in this group will receive bilateral erector spinae plane (ESP) block at the T7 level in the lateral decubitus position under ultrasound guidance before laparoscopic cholecystectomy.
Procedure: Erector Spinae Plane (ESP) Block
Patients in this group will receive bilateral erector spinae plane (ESP) block at the T7 level in the lateral decubitus position under ultrasound guidance before laparoscopic cholecystectomy.
Procedure: Erector Spinae Plane (ESP) Block
Ultrasound-guided bilateral erector spinae plane (ESP) block performed at the T7 vertebral level. The intervention will be applied in three different patient positions-lateral, prone, or sitting-prior to laparoscopic cholecystectomy.
Also known as: Ultrasound-guided ESP block
Postoperative Pain Score (VAS)
Pain intensity will be assessed using the Visual Analog Scale (VAS, 0-10) at multiple time points following laparoscopic cholecystectomy. The goal is to compare postoperative pain scores between patient groups receiving ESP block in lateral, prone, or sitting positions.
Time frame: 0, 2, 4, 6, 12, and 24 hours postoperatively
Total Postoperative Analgesic Consumption
The cumulative dose (mg) of tramadol administered as rescue analgesia within the first 24 hours postoperatively will be recorded for each group.
Time frame: First 24 hours after surgery
Time to First Analgesic Request
The duration (in minutes) between the end of surgery and the patient's first request for additional analgesia.
Time frame: Within 24 hours postoperatively
Patient Satisfaction Score
Patient satisfaction will be assessed at 24 hours postoperatively using a 5-point Likert scale (1 = very dissatisfied, 5 = very satisfied).
Time frame: 24 hours postoperatively
Skin-to-Target Distance
The distance (in millimeters) from the skin to the ESP block site will be measured via ultrasound at the T7 level in each patient position to determine anatomical variation.
Time frame: During preoperative ESP block procedure
Plan to share: No
No publications or documents are linked to this record.
This study is completed, as verified in Feb 2026. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Harran University