Modelo predictivo para determinar el tamaño de los componentes femoral y tibial en artroplastia total de rodilla

Abstract

Purposes

Objectives technique of preoperative planning in total knee arthroplasty is to set up accurate components, prosthetic under a proper alignment, according to the axial axis of the limb to intervene. To determine the efficacy of the predictive model that sets the size of the femoral and tibial components with patients who underwent primary knee arthroplasty.

Material and methodology

Retrospective, longitudinal study, observational, there were recruited patients submitted to total knee arthroplasty with the design Sigma PFC, realized between January, 2013 to December, 2014 in 80 women and 43 men registered with an age average of 67 years. The average in height, weight and CMI they were 1.65 cm, 76.6 kg and 28.4 Kg/m² respectively.

Results

The models predicted the size of the components exactly in 76% for the femur and 83% for the tibial. All the predictions were inside a size ± 1 number as regards the real components and that they were implanted at the moment of the surgery, with a prediction of 100%. For both models, the height was the most important predictor to determine the size of the components, continued by the genre and the age.

Conclusion

This model predictive has the aptitude to be high precise although he allows to predict a better size, we must have all the sizes available in the surgical room. The prediction model facilitates the preparation of the femur and the shinbone with the final size of the components.