Featured Research

from universities, journals, and other organizations

MRI to 'see through' metal screws developed to follow patients after hip fracture surgery

Date:
March 11, 2014
Source:
Hospital for Special Surgery
Summary:
People who sustain the most common type of hip fracture are at increased risk of complications. A special type of MRI has been developed that can show a detailed image following fracture repair, without the distortion caused by metal surgical screws that are problematic in standard MRIs. Each year, more than 340,000 people suffer a broken hip in the United States.

People who sustain the most common type of hip fracture, known as a femoral neck fracture, are at increased risk of complications. A special type of MRI developed at Hospital for Special Surgery in collaboration with GE Healthcare can show a detailed image following fracture repair, without the distortion caused by metal surgical screws that are problematic in standard MRIs.

Each year, more than 340,000 people suffer a broken hip in the United States. The femoral neck, the area just below the ball of the hip's ball-and-socket joint, is the most common site of fracture, accounting for 45 to 53 percent of cases. People with this type of injury are at high risk of complications because the blood supply to the fractured portion of the bone is often disrupted. The concern is that the decreased blood supply will lead to non-healing or the death of bone cells, known as osteonecrosis.

Researchers at Hospital for Special Surgery developed a specially sequenced, contrast-enhanced MRI to identify potential problems so doctors can intervene early and prevent further damage to the joint.

"This new MRI greatly improves the visualization of bone and soft tissue when there is metal in a joint, such as the screws used to repair a hip fracture," explained Hollis G. Potter, M.D., Chairman of the Department of Radiology and Imaging at HSS.

A study on this subject, titled "Femoral Head Osteonecrosis Following Anatomic Stable Fixation of Femoral Neck Fractures: An in-vivo MRI Study" will be presented at the annual meeting of the American Academy of Orthopaedic Surgeons (AAOS) in New Orleans on March 11, 2014.

The Department of Radiology and Imaging at HSS is known internationally as a premier center for world class musculoskeletal clinical and research imaging. "Imaging is a vital component of the integrated care system provided by HSS," said Dr. Potter. "Our team is constantly optimizing the ability to image the earliest signs of a musculoskeletal condition, disease progression and/or healing."

Despite advances in surgical hardware and techniques, femoral neck fractures remain a significant clinical challenge. The primary complications arising from femoral neck fractures are non-union and osteonecrosis, which occurs when the blood supply to the bone is disrupted. This causes bone cells to die, which can destroy the joint and lead to arthritis.

With respect to femoral neck hip fractures, this is the first MRI that can "see through" surgical screws to detect early signs of osteonecrosis, so that interventions can be initiated before there is further damage, such as collapse of the bone or osteoarthritis.

In the study, patients had an MRI known as a "multi-acquisition variable-resonance image combination," or MAVRIC MRI, three months and 12 months after surgery. "The MAVRIC MRI provided us with information that could not be ascertained from x-rays or a standard MRI," Dr. Potter explained. "A special 3-D fast spin echo technique minimized distortion caused by metal screws used to repair the fracture, facilitating assessment of the hip joint and any potential problems concerning osteonecrosis or non-union."

MRI revealed decreased blood flow to the injured area and osteonecrosis in 80 percent of patients in the superomedial quadrant of the femoral head. However, despite these findings, patients demonstrated excellent radiographic and functional outcomes. Researchers attributed this to a surgical technique that entailed stabilizing the broken bones with screws and restoring the fracture to the correct alignment and normal anatomical position.


Story Source:

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


Cite This Page:

Hospital for Special Surgery. "MRI to 'see through' metal screws developed to follow patients after hip fracture surgery." ScienceDaily. ScienceDaily, 11 March 2014. <www.sciencedaily.com/releases/2014/03/140311133625.htm>.
Hospital for Special Surgery. (2014, March 11). MRI to 'see through' metal screws developed to follow patients after hip fracture surgery. ScienceDaily. Retrieved August 22, 2014 from www.sciencedaily.com/releases/2014/03/140311133625.htm
Hospital for Special Surgery. "MRI to 'see through' metal screws developed to follow patients after hip fracture surgery." ScienceDaily. www.sciencedaily.com/releases/2014/03/140311133625.htm (accessed August 22, 2014).

Share This




More Health & Medicine News

Friday, August 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Drug Used To Treat 'Ebola's Cousin' Shows Promise

Drug Used To Treat 'Ebola's Cousin' Shows Promise

Newsy (Aug. 21, 2014) An experimental drug used to treat Marburg virus in rhesus monkeys could give new insight into a similar treatment for Ebola. Video provided by Newsy
Powered by NewsLook.com
Two US Ebola Patients Leave Hospital Free of the Disease

Two US Ebola Patients Leave Hospital Free of the Disease

AFP (Aug. 21, 2014) Two American missionaries who were sickened with Ebola while working in Liberia and were treated with an experimental drug are doing better and have left the hospital, doctors say on August 21, 2014. Duration: 01:05 Video provided by AFP
Powered by NewsLook.com
Cadavers, a Teen, and a Medical School Dream

Cadavers, a Teen, and a Medical School Dream

AP (Aug. 21, 2014) Contains graphic content. He's only 17. But Johntrell Bowles has wanted to be a doctor from a young age, despite the odds against him. He was recently the youngest participant in a cadaver program at the Indiana University NW medical school. (Aug. 21) Video provided by AP
Powered by NewsLook.com
American Ebola Patients Released: What Cured Them?

American Ebola Patients Released: What Cured Them?

Newsy (Aug. 21, 2014) It's unclear whether the American Ebola patients' recoveries can be attributed to an experimental drug or early detection and good medical care. 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