On the basis of the conventional diagnosis and treatment mode, the experimental group added an application program for closed-loop management of the entire course of the disease. Within 24 hours of admission, orthopedic specialist nurses conducted personal evaluations of patients, mainly observing their level of importance for postoperative functional exercise, compliance with patients and their families, intention towards the application program, setting personalized goals, providing health guidance, and improving patients' awareness of rehabilitation needs. Teach patients to proficiently use the program's educational video viewing function, function exercise video classification query, upload function exercise videos, view medical feedback, and pay attention to questionnaire filling for in-hospital and post hospital health management. During home stay, orthopedic specialist nurses and rehabilitation therapists conduct weekly assessments of exercise compliance and functional status i

The control group patients were treated and managed using conventional diagnosis and treatment methods, followed up by telephone calls and follow-up questionnaire surveys for intervention. Routine discharge guidance includes medication guidance, exercise guidance, dietary guidance, and psychological guidance. It guides patients on the precautions, intervention measures, and follow-up time for self-management at home after discharge. Patients are followed up once a month by phone or in person, and questionnaire data is collected during follow-up visits.

Teach patients to proficiently use the program's educational video viewing function, function exercise video classification query, upload function exercise videos, view medical feedback, and pay attention to questionnaire filling for in-hospital and post hospital health management.

Use a medical protractor to measure, instruct the patient to lie flat and actively/passively flex to the maximum angle of the knee joint, align the medical protractor with the lateral femoral condyle of the knee joint, align the fixed arm with the longitudinal axis of the femur, and move the measuring arm with the longitudinal axis of the tibia. Record the measurement angle, active range of motion AROM, and passive range of motion PROM

The Lysholm score is used for evaluation, which consists of 8 questions with scores ranging from 0 to 100. The higher the score, the better the patient's functional status and their tendency towards daily life activities.

The compliance of rehabilitation functional exercise was assessed using the Orthopedic Patient Functional Exercise Compliance Scale developed by Tan Yuanyuan et al. The total score of this scale is 75 points, with ≤ 20 points indicating low compliance, 21-54 points indicating partial compliance, and ≥ 55 points indicating high compliance. The Cronbach's alpha coefficient of the scale is 0.930, and the content validity index is 0.936, which can be used to evaluate the compliance of orthopedic patients with rehabilitation functional exercise.