This prospective, randomized, single-center, single-blind study aims to evaluate the effects of video-based preoperative education on physician trust, postoperative pain, anxiety, and opioid consumption in patients undergoing elective laparoscopic cholecystectomy under general anesthesia. Sixty-two ASA I-II patients aged 18-65 years will be randomized into two groups: standard verbal information alone or verbal information plus a standardized educational video regarding ultrasound-guided transversus abdominis plane (TAP) block. All patients will receive standardized general anesthesia, multimodal analgesia, and bilateral TAP block. The primary outcome will be physician trust assessed at postoperative 24 hours using the Trust in Physician Scale. Secondary outcomes include preoperative anxiety measured with the Amsterdam Preoperative Anxiety and Information Scale (APAIS), postoperative pain scores, opioid consumption, rescue analgesic requirement, and postoperative nausea and vomiting incidence. The study hypothesizes that video-based education will improve physician trust and perioperative patient-centered outcomes.
18-65 years
American Society of Anesthesiologists (ASA) physical status I-II
Elective laparoscopic cholecystectomy
Psychiatric disease
Anticoagulant use or coagulopathy
Allergy to local anesthetic
Infection at the block site
Parallel
Video-Based Preoperative Block Education
BehavioralParticipants will receive standard preoperative verbal information plus a standardized educational video. The video demonstrates ultrasound anatomy and probe positioning for the transversus abdominis plane (TAP) block without showing invasive needle insertion or procedural performance. The content is designed to improve patient understanding of the regional anesthesia technique while maintaining procedural safety and standardization.
Standard Verbal Preoperative Block Education
BehavioralParticipants randomized to this group will receive standardized preoperative verbal education regarding the ultrasound-guided transversus abdominis plane (TAP) block. The explanation will be delivered by an anesthesiologist using a consistent script and will include the purpose of the block, expected analgesic benefits, and general procedural overview without the use of any visual, video, or multimedia materials. After preoperative education, all patients will undergo standardized general anesthesia, multimodal analgesia, and bilateral ultrasound-guided TAP block as part of routine perioperative care.
Trust in Physician
Physician trust will be assessed using the Trust in Physician Scale. The scale evaluates patients' trust in their treating physician regarding communication, competence, and reliability. Higher scores indicate greater trust in the physician.
Postoperative Pain
Postoperative pain will be assessed using the Numeric Rating Scale ranging from zero to ten, where zero indicates no pain and ten indicates the worst imaginable pain. Pain scores will be recorded at predefined postoperative time points.
Preoperative Anxiety
Preoperative anxiety will be measured using the Amsterdam Preoperative Anxiety and Information Scale (APAIS). This validated questionnaire assesses anxiety levels and information requirement related to surgery and anesthesia. The scale will be used to evaluate the effect of preoperative educational intervention (standard verbal information or video-based education) on patient anxiety levels.
Total Opioid Consumption
Total postoperative opioid consumption will be recorded and converted to intravenous morphine equivalent doses for standardization across patients.
Postoperative Nausea and Vomiting Incidence
Incidence of postoperative nausea and vomiting will be recorded based on patient reports and clinical observation, including any need for antiemetic treatment.
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