Introduction: Total knee arthroplasty is one of the most performed orthopedic surgeries and its incidence is increasing, being the main indication in pathologies such as osteoarthritis and rheumatoid arthritis when these do not respond to conservative treatment. In addition, in recent years the opinion and satisfaction of patients regarding the intervention has become particularly important, being an essential part of the care process. Material and methods: A study has been carried out in the present work with 30 patients undergoing surgery for total knee arthroplasty. They responded to two surveys, one on the importance they attached to different aspects related to pain, mobility and social life before the operation, and another on the degree of improvement they had experienced after the intervention. Subsequently, an analysis of the frequency of response has been prepared, as well as a study on the existence of significant differences between preoperative importance and postoperative improvement. Results: It has been observed that, for patients, the most important aspects before the intervention are "to have no pain", "to improve their general well-being" and "to improve mobility". Also, the aspects that improve most after the intervention are those related to pain, as well as having more mobility in the knee. No statistically significant differences have been found between theimportance of each expectation and the subsequent improvement.