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RISS Versus ESP Block in Laparoscopic Cholecystectomy

Comparison of the Analgesic Efficacy and Effects on Diaphragmatic Function of Bilateral Erector Spinae Plane Block and Bilateral Rhomboid Intercostal-Subserratus Plane Block in Laparoscopic Cholecystectomy: A Prospective Randomized Controlled Trial

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07655323
Acronym
RISS-ESP-LC
Enrollment
80
Registered
2026-06-17
Start date
2026-06-18
Completion date
2026-12-01
Last updated
2026-06-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Postoperative Pain

Keywords

Laparoscopic Cholecystectomy, Erector Spinae Plane Block, Rhomboid Intercostal Subserratus Plane Block, Regional Anesthesia, Diaphragmatic Function, Postoperative Analgesia

Brief summary

This prospective randomized controlled trial aims to compare the analgesic efficacy and effects on diaphragmatic function of bilateral erector spinae plane (ESP) block and bilateral rhomboid intercostal-subserratus plane (RISS) block in patients undergoing elective laparoscopic cholecystectomy. Postoperative pain scores, opioid consumption, diaphragmatic excursion, pulmonary function, and recovery outcomes will be evaluated.

Detailed description

Postoperative pain after laparoscopic cholecystectomy may impair respiratory function and delay recovery. Fascial plane blocks have emerged as effective opioid-sparing analgesic techniques. The erector spinae plane (ESP) block and rhomboid intercostal-subserratus plane (RISS) block are ultrasound-guided regional anesthesia techniques that may provide effective postoperative analgesia while preserving respiratory mechanics. This prospective randomized controlled study will compare bilateral ESP block and bilateral RISS block in adult patients undergoing elective laparoscopic cholecystectomy under general anesthesia. The primary objective is to compare postoperative analgesic efficacy and diaphragmatic function. Secondary outcomes include postoperative opioid consumption, pain scores at rest and during movement, pulmonary function parameters, rescue analgesic requirements, and adverse events.

Interventions

PROCEDUREErector Spinae Plane Block

Bilateral ultrasound-guided erector spinae plane block performed before laparoscopic cholecystectomy for postoperative analgesia.

Bilateral ultrasound-guided rhomboid intercostal-subserratus plane block performed before laparoscopic cholecystectomy for postoperative analgesia.

Sponsors

Ferit Yetik
Lead SponsorOTHER_GOV
Bursa City Hospital
CollaboratorOTHER_GOV

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Outcomes Assessor)

Masking description

Participants and outcome assessors will be blinded to group allocation. Regional blocks will be performed by an anesthesiologist not involved in postoperative assessments.

Intervention model description

Participants will be randomized in a 1:1 ratio to receive either bilateral erector spinae plane block (ESP) or bilateral rhomboid intercostal-subserratus plane block (RISS) before elective laparoscopic cholecystectomy. Outcomes will be compared between two parallel groups.

Eligibility

Sex/Gender
ALL
Age
18 Years to 75 Years
Healthy volunteers
No

Inclusion criteria

- * Age between 18 and 75 years * ASA physical status I-III * Scheduled for elective laparoscopic cholecystectomy under general anesthesia * Provision of written informed consent

Exclusion criteria

* Coagulation disorders or anticoagulant therapy * Known allergy to local anesthetics * Infection at the block application site * Pregnancy or lactation * Chronic opioid use * Cognitive impairment * Refusal to participate in the study * Technical inability to perform the block * Failed block

Design outcomes

Primary

MeasureTime frameDescription
Total Postoperative Tramadol Consumption24 hours after surgeryTotal tramadol consumption during the first 24 hours after laparoscopic cholecystectomy.

Secondary

MeasureTime frameDescription
Postoperative Pain Scores0-24 hours after surgeryPostoperative pain scores assessed using the Numeric Rating Scale (NRS).
Time to First Rescue Analgesia24 hours after surgeryTime from the end of surgery to first rescue analgesic requirement.
Intraoperative Remifentanil ConsumptionDuring surgeryTotal remifentanil consumption during surgery.
Opioid-Related Adverse Events24 hours after surgeryIncidence of nausea, vomiting, pruritus and other opioid-related adverse events.
Block-Related Complications24 hours after surgeryComplications associated with ESP block or RISS block.
Diaphragmatic ExcursionPreoperative and postoperative 24 hoursRight hemidiaphragm excursion measured by ultrasonography.

Countries

Turkey (Türkiye)

Contacts

CONTACTMürsel Ekinci, MD
drmurselekinci@gmail.com+905067137596
CONTACTYusuf Alan, MD
dryusufalan@gmail.com+905396210977
PRINCIPAL_INVESTIGATORMürsel Ekinci, MD

Bursa City Hospital, Health Sciences University Bursa Faculty of Medicine

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jun 23, 2026