Prótesis unicompartimental de rodilla: Cohorte descriptiva

Objective

To determine surgery satisfaction, quality of life, pain, 10-year survival, and function in patients after unicompartmental knee arthroplasty at a third level clinic in Medellin, from 2005 to 2015.

Materials and methods

Information from 22 unicompartmental arthroplasties in 20 patients was gathered, measuring surgery satisfaction using Likert-type scale and Health-Related Quality of Life (HRQOL) through the SF-36. Functionality and pain were obtained using the Knee Society Score (KSS) scale, with a different score for each variable. Finally, survival was defined as those prostheses that had not required revision as primary outcome. Other clinical and surgical variables were determined according to their nature by means, medians or frequencies.

Results

Patient satisfaction was 88.2, KSS was 83 for knee component and 76 for functionality. The HRQOL SF-36 scores grouped in two main components – physical function and mental health – were 53.3 and 60, respectively. Survival specified in this study was 77.3% in a 9.05 years average follow-up.

Conclusions

Unicompartmental knee arthroplasty is a valid treatment option for osteoarthritis of the medial compartment. In this series of patients, the surgery satisfaction was 88.2%, the average survival was 77.3% at the end of a follow up of 9.05 years, in which the main causes of revision were infection and osteolysis. Finally, the functionality and health-related quality of life in our study are comparable to other reports with similar follow-ups in other regions of the world.

Level of evidence: Level of evidence IV.