The pain-relief effect of virtual reality technology in continuous passive motion training during burn patient rehabilitation

INTERVENTION: Sequence A:First cycle: continuous passive motion training (CPM)+ virtual reality technology (VR); second cycle: regular CPM;Sequence B:First cycle: regular CPM; second cycle: CPM + VR; CONDITION: Burn PRIMARY OUTCOME: The worst NRS score during the CPM training process; SECONDARY OUTCOME: Resting pain before CPM training;Pain before CPM training;Average pain NRS during the CPM training process, which is the average of the pain scores at 5, 10, and 15 minutes;Pain change value: Most painful NRS during training ? Resting pain NRS before training;Use of rescue pain medication in the first 6 hours before CPM and within 2 hours after CPM;Training tolerance NRS score;Anxiety and subjective experience;Heart rate, blood pressure;Joint mobility before and after training; INCLUSION CRITERIA: 1. Aged 18–70 years, any gender; 2. Clearly diagnosed as a patient in the post‐burn recovery phase; 3. At least one joint needs CPM training; 4. Vital signs are stable and able to cooperate with CPM rehabilitation training; 5. Conscious, able to understand the study and complete the NRS pain score; 6. Expected to complete two CPM training sessions for the same joint with the same parameters, each lasting 15 minutes; 7. Willing to participate in this study and sign a written informed consent form.