Primary Total Knee Arthroplasty in Patients with BMI of ≥50 kg/m 2: A Cohort Study with Long-Term Follow-up.

Background: The obesity epidemic has given rise to an orthopaedic patient subgroup with a body mass index (BMI) of ≥50 kg/m 2 . Without sound evidential guidance, arthroplasty surgeons and anesthesiologists do not know whether they can push the limits of the surgical feasibility of total knee arthroplasty (TKA) without risks of harm.

Methods: In a retrospective cohort study of patients who had undergone primary TKA for degenerative arthritis at our academic center (n = 10,389; 6,821 women, 4,070 men, and 38 unknown), we compared the outcomes between patients with a BMI of ≥50 kg/m 2 (n = 627) and patients in other weight classes.

The Orthopedic Effects of Electronic Cigarettes: A Systematic Review and Pediatric Case Series.

Electronic cigarette (EC) use is highly prevalent, especially in the adolescent population, where 29% of Canadian adolescents have used an EC in the past thirty days per national surveys. Our pediatric orthopedic referral centre observed a cluster of delayed unions of bone fractures in adolescents using ECs and present the case series here. We then asked whether electronic cigarettes impair bone healing or influence orthopedic outcomes.