The Obesity Has No Influence in Complications of Total Knee Arthroplasty With Robotic Assistance

Abstract

Evaluate the influence of obesity on postoperative complications in patients undergoing robotic-assisted total knee arthroplasty. Retrospective cohort study with medical record analysis, in which patients were divided according to body mass index (BMI): 18.5 to 24.9, 25 to 29.9, 30 to 34.9, and greater than 35. They were also divided into two groups: BMI greater than 35 and BMI less than 35. The groups were compared in terms of the incidence of postoperative complications (infection, arthrofibrosis, deep vein thrombosis, acute myocardial infarction, stroke, and death) in the first 6 months after surgery, surgical time, hemoglobin (Hb) and hematocrit (Ht) drop in the first 24 hours after surgery, and length of hospital stay. A total of 108 patients were included. No relevant difference was observed regarding Hb and Ht reduction, blood loss volume, days of hospitalization, number of infections, or arthrofibrosis requiring surgical correction. However, when analyzing risk factors associated with blood loss, Hb drop, and length of hospital stay, BMI significantly influenced Hb drop (p 0,004) and hospitalization time (p 0,01). Obesity did not significantly influence the incidence of postoperative complications in total knee arthroplasty.