Total knee arthroplasty in obese patients

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering

Background:

• Total knee arthroplasty (TKA) is a common procedure for knee osteoarthritis.
• Patient weight is a potential factor influencing TKA outcomes.
• Understanding the impact of obesity on TKA is crucial for patient selection and management.

Purpose of the Study:

• To evaluate the long-term outcomes of total knee arthroplasty in relation to patient weight.
• To identify any correlations between obesity and specific complications or symptom development post-TKA.

Main Methods:

• A retrospective study of 182 patients (257 knees) who underwent TKA.
• Patients were categorized into five weight classes, including moderate and severe obesity.
• Follow-up assessment occurred two to six years post-surgery, evaluating overall scores and specific symptoms.

Main Results:

• Overall TKA results were rated excellent or good in the vast majority of knees (253/257).
• No significant difference in overall scores was observed across the five weight groups.
• Moderately and severely obese patients showed a higher incidence of patellofemoral symptoms (30%) compared to other weight groups (14%, p<0.03).
• No clear association was found between obesity and thrombophlebitis or wound complications.

Conclusions:

• Total knee arthroplasty demonstrates favorable long-term outcomes across various weight classes.
• Obesity is associated with an increased risk of developing patellofemoral symptoms after TKA.
• Further research may explore targeted interventions for obese patients to mitigate patellofemoral issues post-TKA.