Sensory mapping of two nerve blocks for laparoscopic gallbladder surgery

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This single-center, prospective observational project will enroll adults scheduled for elective laparoscopic cholecystectomy who receive either an External Oblique Plane Block (EOPB) or a Serratus Intercostal Plane Block (SIPB) under ultrasound guidance. Both blocks are performed bilaterally with 0.25% bupivacaine (25 mL per side) immediately before surgery. Cutaneous sensory block will be tested about 30 minutes after the block using a standardized pinprick test and dermatomal mapping of the abdominal midline and quadrants. The study will compare the dermatomal spread, regression patterns, and overlap of sensory areas between the two block techniques to inform perioperative analgesia planning.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* 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 Criteria:

* 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.

Where it's running

• Samsun University, Samsun Training and Research Hospital
  Samsun, Ilkadım, Turkey (Türkiye) Recruiting

Study contacts

• Principal investigator: Hatice Selcuk Kusderci, M.D. — Samsun University Training and Research Hospital
• Study coordinator: Hatice Selcuk Kusderci, M.D.
• Email: drkusderci@hotmail.com
• Phone: +905052159896

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.