Educational Cartoon to Reduce Preoperative Anxiety in Children (CALM-KIDS)

Preoperative anxiety is common in children and may negatively affect cooperation, perioperative behavior, and the overall surgical experience. This study is designed to evaluate whether a child-friendly educational cartoon can reduce preoperative anxiety more effectively than a distractor cartoon or standard verbal information alone in children undergoing elective procedures under general anesthesia. The study is being conducted at a single center and is planned as a prospective randomized controlled clinical trial. A total of 159 pediatric patients aged 7 to 12 years will be enrolled, with 53 participants allocated to each study arm. 

Participants will be randomized into three groups. In Group 1, children will watch an educational cartoon entitled "Shuko Is Having Surgery," developed by the research team to explain preoperative preparation, induction of anesthesia, and the operating room environment in child-friendly language. In Group 2, children will watch an age-appropriate distractor cartoon previously preferred by the child; cartoon selection will exclude violent or frightening content and will be approved by the parent. In Group 3, no video will be shown and participants will receive routine standard verbal preoperative information only. Video viewing will last approximately 8 to 10 minutes and will be performed in the preoperative waiting area using the same device and environmental conditions. After video viewing, routine verbal information will also be provided according to standard practice. All children will receive oral midazolam 0.5 mg/kg as routine premedication approximately 20 to 30 minutes before video viewing or verbal information, using the same standardized protocol across all groups. 

The primary outcome measure is the child's preoperative anxiety level assessed with the Modified Yale Preoperative Anxiety Scale (mYPAS) at the preinduction period after completion of the assigned intervention. Secondary outcomes include the child's self-reported situational anxiety assessed by the State-Trait Anxiety Inventory for Children-State form (STAIC-State), parental preoperative anxiety and information requirement assessed by the Amsterdam Preoperative Anxiety and Information Scale (APAIS), and perioperative physiological parameters including heart rate, systolic and diastolic blood pressure, and oxygen saturation. These measures will be used to compare the effectiveness of the three information strategies and to explore the relationship between anxiety scores and physiological stress responses. 

Eligible participants are children aged 7 to 12 years scheduled for elective procedures under general anesthesia, classified as American Society of Anesthesiologists physical status I or II, whose parents provide written informed consent and who provide age-appropriate verbal assent. Exclusion criteria include a history of neurological or psychiatric disease, developmental delay or cognitive impairment, previous anesthesia experience, visual or hearing impairment preventing video viewing, and refusal of participation by the child or parent. Participation is voluntary, and withdrawal from the study will not affect medical care. Data will be recorded using coded identifiers only and stored securely with access limited to the research team.

• State-Trait Anxiety Inventory for Children-State Form (STAIC-State) Score [Time frame: Immediately after completion of the assigned intervention during the child's preinduction period, before induction of anesthesia]
• Amsterdam Preoperative Anxiety and Information Scale (APAIS) Score [Time frame: Immediately after completion of the assigned intervention during the child's preinduction period, before induction of anesthesia]
• Heart Rate [Time frame: During the child's preinduction period, before induction of anesthesia]