Background
The goal of this study was to evaluate the relationship between body mass index (BMI) and early complications of total hip replacement (THR) and total knee replacement (TKR).
Methods
This is a retrospective study of patients who underwent primary THR and TKR between January 2011 and December 2015. We included patients between 18 and 90 years of age with BMI less than 40 kg/m
2
with a minimal postoperative follow-up time of 45 days. The primary outcomes were the presence of infection, mechanical complications (dislocation, fractures, arthrofibrosis, or neuropraxia), and thromboembolic events. Overweight and obesity were defined as a BMI of 25–29.9 kg/m
2
and ≥ 30 kg/m
2
, respectively.
Results
In total 750 patients were included (THR, 268; TKR, 482) with a mean age of 65.0 ± 12.4 years. The percentage of patients with normal weight, overweight, and obesity was 24.9% (n = 187), 41.7% (n = 313), and 33.4% (n = 250), respectively. The early complication rate was 8.9% (95% confidence interval [CI], 7.1% to 11.2%). Infection and mechanical complications were most prevalent. There was no statistically significant relationship between the incidence of complications and BMI (obesity vs. normal weight: hazard ratio [HR], 1.49; 95% CI, 0.72 to 3.06;
p
= 0.282); however, there was a tendency toward a greater risk of infectious complications in the patients with obesity (HR, 6.08; 95% CI, 0.75 to 49.16;
p
= 0.090). Patients with diabetes mellitus (DM) had more risk of infectious complications than those without DM (HR, 2.60; 95% CI, 1.00 to 6.79).
Conclusions
There was no statistical relationship between BMI and early complications of THR and TKR. Nonetheless, there was a tendency toward a higher risk of infection in patients with some degree of obesity.
Objetivo: Comparar los resultados funcionales del reemplazo total de rodilla con resuperficialización de rótula o sin resuperficialización, con dos años de seguimiento.
Materiales y Métodos: Estudio observacional retrospectivo de grupos comparativos de pacientes con osteoartritis sometidos a un reemplazo total de rodilla primario con resuperficialización de rótula o sin este procedimiento, entre enero de 2014 y diciembre de 2016, dos centros de Colombia. A todos se les colocó una prótesis cementada Optetrak®. La función se evaluó previo cirugía y a los dos años mediante las escalas Knee Society Score (KSS), Hospital for Special Surgery (HSS) y Oxford Knee Score (OKS).
Resultados: Se incluyeron 206 reemplazos totales de rodilla: 94 (grupo con resuperficialización) y 112 (grupo sin resuperficialización). La media de la edad en la cohorte de estudio era de 66.9 ± 9.7 años y el 76,7% (n = 155) eran mujeres. El tiempo quirúrgico fue más prolongado en el grupo con resuperficialización (mediana 100 min, RIC 90-110) que en el otro grupo (mediana 85 min, RIC 70-90; p <0,001). Aunque se observó una mejoría funcional antes del reemplazo total de rodilla y después, en ambos grupos, el cambio en el KSS clínico, el KSS funcional y el OKS fue mejor en el grupo con resuperficialización (p <0,05).
Conclusiones: La resuperficialización de rótula durante el reemplazo total de rodilla se asoció a mejores resultados funcionales a los dos años. No obstante, los pacientes sin resuperficialización también refirieron una mejoría funcional después del reemplazo total de rodilla.Nivel de Evidencia: III
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