The purpose of this clinical trial is to learn whether the use of a "cold and arm sling elevation pillow" affects anxiety and comfort levels in children aged 7-12 years undergoing surgery for upper extremity fractures. The main questions it aims to answer are: * Does the use of a cold and arm sling elevation pillow reduce postoperative anxiety levels in children? * Does the use of a cold and arm sling elevation pillow increase postoperative comfort levels in children? Researchers will compare the experimental group (using the specially designed cold and arm sling elevation pillow) with the control group (receiving standard clinical care, including standard pillows and separate ice packs) to see the effects of the integrated pillow on anxiety and comfort. Participants will: * Receive education before surgery based on their randomly assigned group (experimental or control), * Use the assigned elevation and cold application method for the first 24 hours following surgery, * Complete anxiety and comfort assessment scales at four different time points: before the intervention, just before surgery, 6 hours after surgery, and at the time of discharge.
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Comfort
Timeframe: Measurements will begin one day before surgery and continue on the morning of surgery in the preoperative period. Postoperative measurements will be conducted at 6 hours after surgery and on the first postoperative day prior to discharge.
Postoperative anxiety
Timeframe: Measurements will begin one day before surgery and continue on the morning of surgery in the preoperative period. Postoperative measurements will be conducted at 6 hours after surgery and on the first postoperative day prior to discharge.