RecruitingNCT07445854

Sensory Analysis and Cutaneous Mapping of Different Regional Anesthesia Techniques

Sensory Analysis and Cutaneous Mapping of Different Regional Anesthesia Techniques in Laparoscopic Cholecystectomy Surgery: A Prospective Observational Study

Sponsor

Samsun University

Enrollment

40 participants

Start Date

Nov 15, 2025

Study Type

OBSERVATIONAL

Conditions

Postoperative Pain Management Laparoscopic Cholecystectomy Regional Anesthesia

Summary

This prospective observational study aims to evaluate and compare the sensory block distribution and regression patterns of two regional anesthesia techniques - External Oblique Plane Block (EOPB) and Serratus Intercostal Plane Block (SIPB) - in patients undergoing laparoscopic cholecystectomy. Thirty adult patients (ASA I-III, BMI ≤ 35 kg/m², ≥50 kg) scheduled for elective laparoscopic cholecystectomy procedures will be included, with 20 in each block group. Sensory block areas will be assessed using pinprick test, and dermatomal mapping will visualize the spread. The findings are expected to improve understanding of block behavior and guide multimodal analgesia strategies in laparoscopic cholecystectomy.

Eligibility

Min Age: 18 YearsMax Age: 75 Years

Inclusion Criteria4

Patients scheduled for elective laparoscopic cholecystectomy surgery and who have received a regional anesthesia technique for this purpose.
Aged between 18-75 years.
Belonging to ASA I-III group.
Having provided written informed consent.

Exclusion Criteria7

Patients who refuse to participate.
Patients who did not receive a block.
Patients classified as ASA IV.
History of previous abdominal surgery (affecting the laparoscopic approach).
Patients with cognitive dysfunction or inability to cooperate.
Patients diagnosed with psychiatric disorders (schizophrenia, mania, depression, etc.).
Patients who have been using antipsychotic medication for more than 4 weeks.

Interventions

PROCEDUREExternal Oblique Plane Block (EOPB)

Ultrasound-guided External Oblique Plane Block (EOPB) performed bilaterally using 0.25% bupivacaine (25 mL per side, total 50 mL) for postoperative analgesia in laparoscopic cholecystectomy.

PROCEDURESerratus Intercostal Plane Block (SIPB)

Ultrasound-guided Serratus Intercostal Plane Block (SIPB) performed bilaterally using 0.25% bupivacaine (25 mL per side, total 50 mL) for postoperative analgesia in laparoscopic cholecystectomy.