Health news
Health news top Health news

   Login  |  Register    
Health News Make AMN Your Home PageDiscussion BoardsAdvanced Search ToolMedical RSS/XML News FeedHealth news
  You are here : Health.am > Health Centers > Obesity - Surgery - Trauma & Injuries -
Obesity alone may not affect knee replacement outcome or increase overall complication risk Obesity alone may not affect knee replacement outcome or increase overall complication risk

Obesity alone may not affect knee replacement outcome or increase overall complication risk

Obesity • • Surgery • • Trauma & InjuriesMar 21, 2013

Obesity alone may not diminish outcomes or increase the risk of complications in total knee replacement (TKR) patients, according to two research studies presented today at the 2013 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS). However, TKR replacement patients may face significantly longer hospital stays and related costs.

Total knee replacement in obese patients previously has been associated with increased post-operative complications and lower clinical function scores in multiple research studies.

In the study, “The Effect of Obesity on Direct Medical Costs in Total Knee Arthroplasty (TKA)” researchers reviewed the records of more than 8,000 patients who had undergone single, primary or revision TKR procedures between 2000 and 2008, collecting data on clinical and surgical characteristics, complications and hospital costs. Patients were classified into eight groups based on body mass index (BMI) and comorbidities (diabetes, hypertension, etc.).

Length of hospital stay and direct medical costs were lowest for patients with a BMI of 25-30kg/m2. Greater BMI was associated with significantly longer hospital stays after adjusting for age, sex, type of surgery and comorbidities. Every 5 unit increase in BMI beyond 30 kg/m2 was associated with approximately $250-$300 in higher hospitalization costs for primary knee arthroplasty and $600-$650 higher hospitalization costs for revision procedures.

Although increasing BMI was not associated with an overall increase in complication risk during the 90-day window, there was a higher rate of infection in obese patients.

"The costs associated with obesity are believed to be largely those that come from managing comorbid medical conditions linked to obesity, such as diabetes,” said lead study author Hilal Maradit-Kremers, MD, an associate professor of epidemiology at Mayo Clinic in Rochester, Minn. In this study, “we attempted to tackle this problem by restricting the analysis to patients without comorbid conditions. Even in the absence of comorbidities, obesity was still associated with longer stays and higher hospital costs.”

“The bottom line is that obesity is increasingly common among patients undergoing joint replacement and it creates a myriad of technical and medical challenges, and likely contributes to the financial burden of the surgery,” said senior author David G. Lewallen, MD, an orthopaedic surgeon, also from Mayo Clinic.

In the related study, “Outcome of Total Knee Arthroplasty in Obese Patients,” researchers in Singapore analyzed the outcomes of 301 TKA patients between December 2008 and April 2010 and grouped them according to BMI.

There was no difference in surgical time between obese and non-obese patients, although the obese patients had a longer hospital stay following TKR – 7.77 days versus 6.29 days for non-obese patients.

Patient outcomes were recorded pre-operatively and at 2 years after TKR using Knee Society Score (KSS), Short Form 36 Health Survey (SF36) and Western Ontario and McMaster Universities Arthritis Index (WOMAC) outcomes.

The non-obese patients achieved “superior” post-operative flexion (ability to bend) and range of movement. The absolute improvements in WOMAC scores among the obese patients post surgery also were deemed statistically superior and comparable to those of non-obese patients.

The study concluded that TKR is a “safe and efficacious operation in obese patients with no significantly greater risk of complication.”

“Obesity does not negate good surgical outcome in total knee arthroplasty,” said lead study author Chin Tat Lim, MD.

###

A Nation in Motion

More than one in four Americans have bone or joint health problems, making them the greatest cause of lost work days in the U.S. When orthopaedic surgeons restore mobility and reduce pain, they help people get back to work and to independent, productive lives. Orthopaedic surgeons provide a great value, in both human and economic terms; and access to high-quality orthopaedic care keeps this “Nation in Motion.”

Lauren Pearson Riley

708-227-1773
American Academy of Orthopaedic Surgeons

Provided by ArmMed Media

Obesity alone may not affect knee replacement outcome or increase overall complication risk Bookmark this! Obesity alone may not affect knee replacement outcome or increase overall complication risk

RELATED STORIES:


 Comments [ + Post Your Own

Now you're in the public comment zone. What follows is not Armenian Medical Network's stuff; it comes from other people and we don't vouch for it. A reminder: By using this Web site you agree to accept our Terms of Service. Click here to read the Rules of Engagement.

There are no comments for this entry yet. [ + Comment here + ]




We are pleased to let readers post comments about an article. Please increase the credibility of your post by including your full name and email.

All comments are reviewed by our editors before they are posted on the site. Just keep it clean, kids.

Name:

Email:

Location:

URL:

Remember my personal information

Notify me of follow-up comments?

Please enter the word you see in the image below:


   [advanced search]   
What health info have you recently searched for online?
Disease or condition
Exercise or fitness
Diet, nutrition or vitamins
None of the above


Get free support - Headache Causes, Symptoms, Diagnosis, and Treatment on HeadacheCare.net


Health Centers







Diabetes

















Health news
  


Health Encyclopedia

Diseases & Conditions

Drugs & Medications

Health Tools

Health Tools



   Health newsletter

  





   Medical Links



   RSS/XML News Feed



   Feedback


Add to Yahoo RSS News Feed



Google Reader




Syndicate


This website is accredited by Health On the Net Foundation. Click to verify. We comply with the HONcode standard for trustworthy health information:
Verify here.




What is Levonorgestrel Emergency contraceptive Kit. Levonorgestrel can prevent ovulation and pregnancy after unprotected sex