4-7-8 Breathing and Teach-Back Method for Pain, Anxiety, and Sleep After Knee Surgery: A Clinical Trial

"In the experimental group, patients will be provided with information regarding the purpose and significance of the 4-7-8 breathing technique using the Teach-Back method one day before surgery. To confirm comprehension, patients will be asked to repeat the information. The exercise will be demonstrated in a one-on-one session using the Teach-Back method, and patients will be guided through practical application. Following the training, patients will be instructed to perform the exercise independently, with the researcher monitoring its correct implementation. Each patient will be given a 4-7-8 Breathing Exercise Application Guide, which outlines the exercise steps based on relevant literature.~Before surgery, patients will complete the Patient Information Form, the Visual Analog Scale (VAS) for pain, the State-Trait Anxiety Inventory (STAI), and the Richards-Campbell Sleep Questionnaire (RCSQ). Postoperatively, the VAS and STAI will be administered both before (pre-test) and after"