Featured Research

from universities, journals, and other organizations

One third of knee replacements classified as inappropriate

Date:
June 30, 2014
Source:
Wiley
Summary:
More than one third of total knee replacements in the U.S. were classified as “inappropriate” using a patient classification system developed and validated in Spain, a new article reports. The study highlights the need for consensus on patient selection criteria among U.S. medical professionals treating those with the potential need of knee replacement surgery.

New research reports that more than one third of total knee replacements in the U.S. were classified as "inappropriate" using a patient classification system developed and validated in Spain. The study, published in Arthritis & Rheumatology, a journal of the American College of Rheumatology (ACR), highlights the need for consensus on patient selection criteria among U.S. medical professionals treating those with the potential need of knee replacement surgery.

The Agency for Healthcare Research and Quality reports more than 600,000 knee replacements are performed in the U.S. each year. In the past 15 years, the use of total knee arthroplasty has grown significantly, with studies showing an annual volume increase of 162% in Medicare-covered knee replacement surgeries between 1991 and 2010. Some experts believe the growth is due to use of an effective procedure, while others contend there is over-use of the surgery that relies on subjective criteria.

The present study led by Dr. Daniel Riddle from the Department of Physical Therapy at Virginia Commonwealth University in Richmond, examined the criteria used to determine the appropriateness of total knee arthroplasties. "To my knowledge, ours is the first U.S. study to compare validated appropriateness criteria with actual cases of knee replacement surgery," said Dr. Riddle.

A modified version of the appropriateness classification system developed by Escobar et al. along with the Western Ontario and McMaster Universities Arthritis Index (WOMAC) Pain and Physical Function scales were used to assess participants enrolled in the Osteoarthritis Initiative -- a prospective 5-year study funded in part by the National Institutes of Health (NIH). There were 175 subjects who underwent total knee replacement surgery, and were classified as appropriate, inconclusive, or inappropriate.

The mean age of knee replacement patients was 67 years and 60% of the group was female. Analyses show that 44% of surgeries were classified as appropriate, 22% as inconclusive, and 34% deemed inappropriate. The characteristics of patients undergoing surgery were varied.

"Our finding that one third of knee replacements were inappropriate was higher than expected and linked to variation in knee pain OA severity and functional loss. These data highlight the need to develop patient selection criteria in the U.S.," concludes Dr. Riddle.

In a related editorial, Dr. Jeffery Katz from the Orthopedic and Arthritis Center for Outcomes Research at Brigham and Women's Hospital in Boston, Mass., writes, "I agree with Riddle and colleagues, and with Escobar and colleagues, that we should be concerned about offering total knee replacements to subjects who endorse "none" or "mild" on all items of the WOMAC pain and function scales."

Dr. Katz also calls for an update to the criteria used to determine which patients are good candidates for total knee arthroplasty. Dr Katz's work is supported in part by a grant from the NIH (P60AR047782).


Story Source:

The above story is based on materials provided by Wiley. Note: Materials may be edited for content and length.


Journal References:

  1. Daniel L. Riddle, William A. Jiranek, Curtis W. Hayes. Using a validated algorithm to judge the appropriateness of total knee arthroplasty in the United States: A multi-center longitudinal cohort study. Arthritis & Rheumatology, 2014; DOI: 10.1002/art.38685
  2. Jeffrey N. Katz. Appropriateness of total knee replacement. Arthritis & Rheumatology, 2014; DOI: 10.1002/art.38688

Cite This Page:

Wiley. "One third of knee replacements classified as inappropriate." ScienceDaily. ScienceDaily, 30 June 2014. <www.sciencedaily.com/releases/2014/06/140630093625.htm>.
Wiley. (2014, June 30). One third of knee replacements classified as inappropriate. ScienceDaily. Retrieved August 29, 2014 from www.sciencedaily.com/releases/2014/06/140630093625.htm
Wiley. "One third of knee replacements classified as inappropriate." ScienceDaily. www.sciencedaily.com/releases/2014/06/140630093625.htm (accessed August 29, 2014).

Share This




More Health & Medicine News

Friday, August 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Killer Amoeba Found in Louisiana Water System

Killer Amoeba Found in Louisiana Water System

AP (Aug. 28, 2014) State health officials say testing has confirmed the presence of a killer amoeba in a water system serving three St. John the Baptist Parish towns. (Aug. 28) Video provided by AP
Powered by NewsLook.com
Who Could Be Burnt by WHO's E-Cigs Move?

Who Could Be Burnt by WHO's E-Cigs Move?

Reuters - Business Video Online (Aug. 28, 2014) The World Health Organisation has called for the regulation of electronic cigarettes as both tobacco and medical products. Ciara Lee looks at the impact of the move on the tobacco industry. Video provided by Reuters
Powered by NewsLook.com
CDC Director On Ebola Outbreak: 'It's Worse Than I Feared'

CDC Director On Ebola Outbreak: 'It's Worse Than I Feared'

Newsy (Aug. 28, 2014) CDC director Tom Frieden says the Ebola outbreak is even worse than he feared. But he also said there's still hope to contain it. Video provided by Newsy
Powered by NewsLook.com
How A 'Rule Of Thumb' Could Slow Down Drinking

How A 'Rule Of Thumb' Could Slow Down Drinking

Newsy (Aug. 28, 2014) A study suggests people who follow a "rule of thumb" when pouring wine dispense less than those who don't have a particular amount in mind. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins