I. Research Objective To verify the efficacy of an animated nurse-patient interaction model in alleviating postoperative pain in children with congenital heart disease, optimize non-pharmacological analgesic nursing processes for children post-surgery, and improve family nursing satisfaction.

II. Research Subjects Thirty-five children aged 3-7 years who underwent curative surgery for congenital heart disease were selected and randomly divided into an observation group and a control group, each consisting of 35 cases.

• Inclusion criteria: Normal cognitive function, admitted to the intensive care unit post-surgery, and family informed consent obtained.
• Exclusion criteria: Concurrent severe organ or neurological diseases, occurrence of severe postoperative complications, or resistance to animated intervention.

III. Research Methods

1. Intervention Measures

   • Control group: Implemented routine postoperative pain management for congenital heart disease (pharmacological analgesia + basic nursing).
   • Observation group: On the basis of routine nursing, preoperative assessment of children's animated preferences was conducted. Appropriate-age animations were played 15-30 minutes per session, 3-4 times per day when the child's vital signs were stable post-surgery. Nurses synchronized interactive activities, and pain was assessed every 2 hours, with intervention strategies adjusted based on scoring.

2. Observation Index

   - Secondary indicators: Child anxiety score, family anxiety score (SAS), nursing satisfaction.

3. Statistical Analysis: SPSS 26.0 software was used. t-test was performed for measurement data, and χ² test was performed for counting data. P < 0.05 was considered as statistically significant difference.

IV. Implementation Steps 1. Preparation Phase: Form a team, develop the protocol and informed consent form, and train the researchers. 2. Intervention phase: Recruitment and grouping of subjects, implementation of interventions, and data collection. 3. Analysis and Summary Phase: Conduct statistical analysis of data, prepare reports, and establish standardized nursing procedures.

V. Ethics and Expected Outcomes Ethics: With approval from the hospital's ethics committee and after obtaining informed consent from the family, the child may voluntarily withdraw from the study. The control group will receive equivalent intervention opportunities after completing the study.

Research Protocol for Postoperative Pain Management in Children with Congenital Heart Disease Based on the Animation-Patient Interaction Model Background and Objectives (1) Research Background Congenital heart disease is one of the common congenital malformations in children, with surgical intervention being the primary treatment modality. Postoperative wound pain and catheter irritation can easily trigger crying and agitation in pediatric patients, not only impairing wound healing and postoperative recovery but also increasing psychological burden on parents. Traditional pain management primarily relies on pharmacological analgesia, which carries certain side effects. Moreover, young patients exhibit limited capacity for pain expression, making precise assessment and intervention challenging. The animation-patient interaction model represents an innovative approach that integrates age-appropriate animated content into perioperative care. By diverting children's attention and alleviating negative emotions, this method reduces pain perception, providing a novel non-pharmacological intervention direction for postoperative pain management in pediatric patients.

(2) Research Objectives 1. To evaluate the efficacy of the animated nurse-patient interaction model in improving postoperative pain scores, crying duration, and sleep quality in children with congenital heart disease.

2. To explore the impact of this model on anxiety levels and nursing satisfaction among family members of pediatric patients.

3. Develop a standardized and scalable animated nursing process for postoperative patient-nurse interaction in children with congenital heart disease.

2. Study Subjects and Methods (1) Study Subjects The study subjects were children undergoing radical surgery for congenital heart disease in the Department of Cardiac Surgery of a tertiary Grade A children's hospital. The inclusion and exclusion criteria were as follows: 1. Inclusion Criteria-Age 3-7 years, with normal cognitive function and the ability to normally watch animations; -Scheduled for elective radical surgery for congenital heart disease, requiring postoperative admission to the intensive care unit (ICU) for observation; -Informed consent from the child's family members, with voluntary participation in the study.

2. Exclusion criteria: -Concomitant severe organ diseases or neurological disorders; -Postoperative severe complications (e.g., massive hemorrhage, septic shock, etc.); -Significant emotional resistance to the animated content.

A controlled trial was conducted, with eligible pediatric patients divided into an observation group and a control group at a 1:1 ratio, each comprising 35 cases. (II) Research Methods 1. Intervention Method-Control Group: The conventional postoperative pain management protocol for congenital heart disease was implemented, including prescribed analgesics, positional care, wound care, and basic psychological reassurance.

• Observation Group: In addition to conventional pain management, the animation-based nurse-patient interaction model was implemented, with the specific intervention process as follows: ① Preoperative assessment: The nurse evaluated the child's age and interest preferences one day before the procedure, communicated with the family to determine the type of animation the child preferred, and selected age-appropriate animations that were non-violent, slow-paced, and visually soothing (e.g., Peppa Pig, Super Wings, etc.), while preparing mobile playback devices.

  • Postoperative intervention: After the child regains consciousness and stabilizes vital signs postoperatively, selected animations are played in the intensive care unit (ICU) for 15-30 minutes each session, 3-4 times daily. During playback, nurses conduct synchronous nurse-patient interaction, such as explaining the animation plot and guiding the child to imitate the actions of the animated characters. Concurrently, the FLACC pain scale is used to assess the child's pain level every 2 hours.

    • Intervention adjustment: Optimize the intervention strategy based on pain scores. For mild pain, focus on animation playback and interaction; for moderate pain, combine non-pharmacological nursing measures such as massage and position adjustment; for severe pain, supplement with animation intervention in addition to prescribed medication.

      2. Observation indicators-Primary indicators: Pain scores of pediatric patients at 1 hour, 6 hours post extubation, and 24/48 hours postoperatively.

Secondary indicators: anxiety scores of pediatric patients, anxiety scores of family members (using the Self-Rating Anxiety Scale, SAS); nursing satisfaction scores (using a hospital-developed nursing satisfaction questionnaire).

3. Data Collection and Statistical Analysis-Trained researchers were assigned to collect data, ensuring its objectivity and accuracy.

-Data analysis was performed using SPSS 26.0 statistical software. Measurement data were expressed as mean ± standard deviation, and intergroup comparisons were conducted using t-test. Categorical data were expressed as rates, and intergroup comparisons were performed using χ² test. A P-value <0.05 was considered statistically significant.

III. Research Content and Implementation Steps (1) Research Content 1. Standardization process construction of the animated patient-nurse interaction model, including animation screening criteria, playback timing, interaction methods, and effect evaluation dimensions.

2. Comparative analysis of postoperative pain-related indicators and rehabilitation indicators between the observation group and the control group.

3. Investigation and analysis of the psychological status and nursing satisfaction of pediatric patients' family members.

(2) Implementation Steps 1. Preparation Phase: Establish a research team comprising cardiac surgery nurses, pediatric nursing researchers, and statistical analysts; develop the research protocol and informed consent form; train researchers to standardize intervention methods and data collection criteria.

2. Intervention phase: Recruit study subjects, randomly assign them to groups, and implement corresponding interventions; strictly collect all index data according to the study protocol, and promptly record and organize the data.

3. Data analysis phase: Input and statistical analysis of collected data, comparison of index differences between the two groups, and verification of intervention efficacy.

4. Summary phase: Prepare the research report, establish standardized nursing procedures, and propose recommendations for clinical implementation.

IV. Ethical Considerations 1. This research protocol was implemented after approval by the hospital ethics committee.

2. Before the study, provide detailed explanations to the child's family regarding the purpose, methods, risks, and benefits of the study, and obtain their informed consent. During the study, respect the child's wishes, and allow them to withdraw from the study at any time if they exhibit resistance.

3. The control group received conventional nursing care, and after the study concluded, equal opportunities for animated care-intervention interactions were provided to the children in the control group to safeguard their rights.

V. Promotional Value This model is characterized by its simplicity, low cost, and high safety, making it suitable for widespread application in pediatric and cardiac surgery departments across all levels of hospitals. It not only enhances the quality of postoperative pain management in children but also optimizes the nurse-patient relationship and improves family satisfaction.

Inclusion Criteria:

• Inclusion criteria:

  • Children diagnosed with CHD and treated with surgical intervention according to the 'Pediatric Congenital Heart Disease Diagnosis and Treatment Guidelines' and echocardiographic images [100];

    • Age between 3 to 7 years, including 3 years and 7 years;

      • Surgical procedure is thoracotomy;

        • Diagnosed with ventricular septal defect, atrial septal defect, or atrial septal defect combined with ventricular septal defect, patent ductus arteriosus, or tetralogy of Fallot;

Exclusion Criteria:

• Inclusion criteria:

  • Children diagnosed with CHD and treated with surgical intervention according to the 'Pediatric Congenital Heart Disease Diagnosis and Treatment Guidelines' and echocardiographic images [100];

    • Age between 3 to 7 years, including 3 years and 7 years;

      • Surgical procedure is thoracotomy;

        ④ Diagnosed with ventricular septal defect, atrial septal defect, or atrial septal defect combined with ventricular septal defect, patent ductus arteriosus, or tetralogy of Fallot;