Episode Details

Comorbidities, obesity, diabetes and age why they matter for hip and knee joints Dr Bernard Zicat

This podcast centers on the complex interplay between obesity and diabetes as comorbidities in the field of orthopedics, specifically focusing on their impact on surgical outcomes in hip and knee arthroplasty. Dr Bernard Zicat, with extensive experience in implant design since 1994, reflects on the evolving perceptions of these conditions in the surgical realm.

The discussion begins with an overview of diabetes, acknowledged as a significant concern due to its historical links to wound healing and infection risks in surgical patients. It is noted that while the incidence of diabetes has shifted over the years—especially with advancements in management of insulin-dependent patients—its correlation with surgical complications appears less pronounced today compared to the cardiovascular risks associated with surgery. Citing a German study, Dr Zicat points out that diabetic patients often present higher body mass indexes (BMIs) but that their overall surgical outcomes, including pain management, do not differ significantly when BMI is adjusted.

The bulk of the lecture focuses on obesity, drawing on robust data from the National Joint Replacement Registry to illustrate the high incidence of joint replacements among obese patients. It is emphasized that those in higher obesity categories show a disproportionate need for knee and hip replacements, with factors such as joint instability and increased translational forces contributing to the wear and tear of these joints. There is a notable rise in younger patients requiring such procedures, predominantly linked to obesity, raising concerns about the long-term implications on joint health.

Dr Zicat discusses the surgical challenges presented by obese patients, including prolonged operative times and complications related to wound healing, particularly in hip replacements where surgical incisions are affected by surrounding fat deposits. Historical context is provided on past recommendations, which discouraged surgery in overweight patients, highlighting the difficulty in encouraging weight loss among individuals with joint pain who struggle to exercise.

The management of weight loss is explored, including surgical options and the emergence of pharmacological treatments like semiglutides, which have shown promising results in significantly reducing weight. However, the speaker clearly states that weight loss alone does not necessarily prevent the development of osteoarthritis nor eliminate the need for joint replacement once osteoarthritis has already progressed. Instead, it may temporarily alleviate symptoms and postpone surgery, but eventually, many patients still require intervention.

Obstructive sleep apnea emerges as a common concern among obese surgical patients, yet the evolving management practices in post-operative care reflect a growing comfort in treating these patients without extensive ICU stays. The focus shifts to the increased risks associated with surgery in this demographic, particularly regarding infection rates, emphasizing the importance of advanced wound management techniques which have revolutionized care, such as negative pressure wound dressings.

The lecture concludes with a summary advocating for a reconsideration of strict BMI policies that govern surgical eligibility. The evidence presented indicates that obese patients experience comparable satisfaction and functional improvement post-surgery relative to their non-obese counterparts, despite a higher risk of complications. Hence, the speaker recommends that patients be informed and encouraged to pursue surgery when necessary, as the benefits significantly enhance their quality of life. Overall, this discourse sheds light on the necessity of a balanced approach to managing obesity in orthopedic surgery, reinforcing the idea that with proper care and techniques, surgica