Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Arthroscopic treatment of common hip problem improves range of motion

11.07.2011
Arthroscopic treatment of a common hip problem that leads to arthritis is successful in terms of restoring range of motion, according to results from a recent Hospital for Special Surgery study. The study will be presented at the annual meeting of the American Orthopaedic Society for Sports Medicine, held July 7-11 in San Diego.

"This is the first study to show that in patients who are being treated for hip impingement with arthroscopy, not only do we restore their mechanical measurements, but by doing so, we have improved their functional range of motion across the joint," said Bryan T. Kelly, M.D., co-director of the Center for Hip Pain and Preservation at Hospital for Special Surgery in New York.

This study received the 2011 Excellence in Research Award from the American Orthopaedic Society for Sports Medicine.

In recent years, a hip condition known as femoro-acetabular impingement (FAI) or hip impingement has become widely recognized as one of the most common causes of early osteoarthritis in the hip. The hip is a ball-and-socket joint where the upper end of the thigh bone fits into the cup-shaped socket of the pelvis. In a healthy hip joint, the ball rotates freely in the cup, but in some people a bony bump on the upper thigh bone produces a situation where there is inadequate space for the hip bone to move freely in the socket. The result is damage to the socket rim and the cartilage that lines the bones, which can lead to hip arthritis.

Structural correction of the bone through arthroscopic or open surgery has been shown to be successful at relieving symptoms of FAI and returning athletes to their sport of choice. Before this study, however, researchers had not studied how good arthroscopic repair was at restoring range of motion.

To find out, researchers at Hospital for Special Surgery in New York City used computer-assisted, three dimensional analysis to assess differences in hip range-of-motion before and after the arthroscopic treatment of FAI. The study included 10 patients with symptomatic FAI who underwent a computed tomography (CT) scan before and after surgery. The CT scan was then fed into a software program that generated a three dimensional, animated picture of their hip joint.

"Their hip is moved in the computer program until there is collision between the ball and the socket. It assesses the point at which impingement occurs," explained Dr. Kelly. "Postoperatively, another CT scan is obtained and we assess the same range of motion."

The researchers found great improvements in internal rotation, moving your knee to the middle of your body, and in hip flexion, the motion of bringing your knee to your chest. Hip flexion was improved by 3.8 degrees and internal rotation was improved by 9.3 degrees. A comparison of the alpha angle, which measures the roundness of the femoral head (ball of the thigh bone), showed an improvement of roughly 20 degrees.

"Before this study, we did not know what our ability was to functionally improve range of motion across a hip joint in a patient who has had surgical correction of their underlying hip impingement," said Dr. Kelly. "With this study, we have clear objective data, confirming with dynamic assessment, that by improving the mechanical shape of the joint, we significantly improve range of motion and significantly reduce the areas of bony conflict."

Other investigators involved in the study are Robert Buly, M.D., Iftach Hetsroni, M.D., Erin Magennis, M.Sc., and Joseph Lipman, MSE, from Hospital for Special Surgery; Mark Dolan, M.D., former HSS fellow now at Northwestern Orthopedic Institute, Chicago; and first author Asheesh Bedi, M.D., former HSS fellow now at the University of Michigan.

About Hospital for Special Surgery

Founded in 1863, Hospital for Special Surgery (HSS) is a world leader in orthopedics, rheumatology and rehabilitation. HSS is nationally ranked No. 1 in orthopedics, No. 3 in rheumatology, No. 16 in neurology and No. 18 in geriatrics by U.S. News & World Report (2010-11), has received Magnet Recognition for Excellence in Nursing Service from the American Nurses Credentialing Center, and has one of the lowest infection rates in the country. From 2007 to 2011, HSS has been a recipient of the HealthGrades Joint Replacement Excellence Award. A member of the NewYork-Presbyterian Healthcare System and an affiliate of Weill Cornell Medical College, HSS provides orthopedic and rheumatologic patient care at New York-Presbyterian Hospital at New York Weill Cornell Medical Center. All Hospital for Special Surgery medical staff are on the faculty of Weill Cornell Medical College. The hospital's research division is internationally recognized as a leader in the investigation of musculoskeletal and autoimmune diseases. Hospital for Special Surgery is located in New York City and online at www.hss.edu.

Phyllis Fisher | EurekAlert!
Further information:
http://www.hss.edu

More articles from Health and Medicine:

nachricht The genes are not to blame
20.07.2018 | Technische Universität München

nachricht Targeting headaches and tumors with nano-submarines
20.07.2018 | Universitätsmedizin der Johannes Gutenberg-Universität Mainz

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Future electronic components to be printed like newspapers

A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.

The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

A smart safe rechargeable zinc ion battery based on sol-gel transition electrolytes

20.07.2018 | Power and Electrical Engineering

Reversing cause and effect is no trouble for quantum computers

20.07.2018 | Information Technology

Princeton-UPenn research team finds physics treasure hidden in a wallpaper pattern

20.07.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>