Sensory Analysis and Cutaneous Mapping of Different Regional Anesthesia Techniques

Condition(s) studied

Investigational drug(s) / intervention(s)

External 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.

Serratus 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.

Study 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

Primary outcome measure(s)

• Cutaneous Sensory Block Area of EOPB and SIPB — 30 minutes after block application
  The primary outcome is the dermatomal mapping of the cutaneous sensory block areas produced by the serratus intercostal plane block (SIPB) and external oblique plane block (EOPB), and the comparison of sensory block extent between the two techniques.

Trial sites (1)

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