Medical Design and Outsourcing

  • Home
  • Medical Device Business
    • Mergers & Acquisitions
    • Financial
    • Regulatory
  • Applications
    • Cardiovascular
    • Devices
    • Imaging
    • Implantables
    • Medical Equipment
    • Orthopedic
    • Surgical
  • Technologies
    • Contract Manufacturing
    • Components
    • Electronics
    • Extrusions
    • Materials
    • Motion Control
    • Prototyping
    • Pumps
    • Tubing
  • Med Tech Resources
    • DeviceTalks Tuesdays
    • Digital Editions
    • eBooks
    • Manufacturer Search
    • Medical Device Handbook
    • MedTech 100 Index
    • Podcasts
    • Print Subscription
    • The Big 100
    • Webinars / Digital Events
    • Whitepapers
    • Video
  • 2022 Leadership in MedTech
    • 2022 Leadership Voting!
    • 2021 Winners
    • 2020 Winners
  • Women in Medtech

Long-Term Success Of ACL Reconstruction Is Connected To Way The Patient Moves Post-Surgery

September 26, 2018 By Brigham Young University

A third of people who undergo ACL reconstruction surgery will have osteoarthritis in their injured knee within 10 years. Within two decades, nearly 50 percent will — terrible odds for getting a debilitating condition with no known cure.

While no one yet knows exactly why this is the case, researchers have explored two related theories:

  1. The knee injury itself may cause persistent and chronic inflammation resulting in underlying joint tissue changes.
  2. People who sustain an ACL injury end up moving differently during activities like running, jumping and walking, which causes damage to cartilage over time.

Keying on those theories, researchers from the University of North Carolina and Brigham Young University conducted a study to observe walking biomechanics of 130 subjects who have had ACL reconstruction surgery. The study, which included people who had the surgery anywhere from 6 months to 13 years previously, collected data describing ground reaction forces on the injured leg during walking.

They found people who report lingering symptoms post-surgery either underload their injured leg (6-12 months after surgery) or overload the injured leg (after the 24-month mark), as compared to those who have had the surgery but no longer report symptoms.

“ACL reconstruction is fairly effective, but some people don’t ever fully recover,” says study co-author Matt Seeley, associate professor of exercise sciences at BYU. “The way you move is related to the outcome of your ACL surgery.”

For the study, published in Medicine and Science in Sports and Exercise, each subject was placed in either a symptomatic or asymptomatic category, based on self-reports of knee pain and other symptoms, and then asked to walk barefoot at a self-selected speed over a force plate embedded in a walkway. Participants were told to walk as if they were “comfortably walking over a sidewalk” while maintaining a constant speed.

Lead author Brian Pietrosimone of UNC and BYU’s Seeley measured ground reaction forces for the subjects at three time periods: less than 12 months post-surgery, between 12 and 24 months, and more than 24 months. Participants were outfitted with retroreflective markers on their legs and researchers then used a 10-camera 3D motion capture system to track the positions of the markers.

They found the symptomatic group was overloading or underloading their injured leg 4 to 5 percent more than the asymptomatic group.

“At first look, these changes are relatively small,” Pietrosimone says. “Yet when you think about a 5 percent difference every step you take every day, over the course of a month, year, or lifetime, you can extrapolate why a seemingly small change could lead to a progressive and chronic disease like posttraumatic osteoarthritis.”

The findings support the notion that mechanical loading of the lower extremity is associated with clinically relevant knee symptoms after ACL surgery and, surprisingly, that association is influenced by time post-surgery.

The implication is that people who have had ACL reconstruction surgery need to restore movement mechanics in a way to improve chances of avoiding osteoarthritis. According to the authors, this may include closer adherence to a physical therapy program or increased strength training.

“These data indicate overloading and underloading are likely deleterious to cartilage,” Seeley says. “This study sets the table for a longitudinal study to determine the precise causes of altered leg biomechanics post-surgery.”

Related Articles Read More >

Logos of Creo Medical and Intuitive
Creo Medical inks collaboration agreement with Intuitive
Lazurite ArthroFree wireless surgical camera system Minnetronix Medical
How Minnetronix Medical helped Lazurite with its wireless surgical camera
Medtronic Hugo robot-assisted surgery system
The road to a robot: Medtronic’s development process for its Hugo RAS system
A portrait of Stryker executive Siddarth Satish
How Stryker includes users for product design in the digital age

DeviceTalks Weekly.

May 20, 2022
DeviceTalks Boston Post-Game – Editors’ Top Moments, Insulet’s Eric Benjamin on future of Omnipod 5
See More >

MDO Digital Edition

Digital Edition

Subscribe to Medical Design & Outsourcing. Bookmark, share and interact with the leading medical design engineering magazine today.

MEDTECH 100 INDEX

Medtech 100 logo
Market Summary > Current Price
The MedTech 100 is a financial index calculated using the BIG100 companies covered in Medical Design and Outsourcing.
DeviceTalks

DeviceTalks is a conversation among medical technology leaders. It's events, podcasts, webinars and one-on-one exchanges of ideas & insights.

DeviceTalks

New MedTech Resource

Medical Tubing

Enewsletter Subscriptions

Enewsletter Subscriptions

MassDevice

Mass Device

The Medical Device Business Journal. MassDevice is the leading medical device news business journal telling the stories of the devices that save lives.

Visit Website
MDO ad
Medical Design and Outsourcing
  • MassDevice
  • DeviceTalks
  • MedTech 100 Index
  • Medical Tubing + Extrusion
  • Drug Delivery Business News
  • Drug Discovery & Development
  • Pharmaceutical Processing World
  • R&D World
  • About Us/Contact
  • Advertise With Us
  • Subscribe to Print Magazine
  • Subscribe to E-newsletter
  • Attend our Monthly Webinars
  • Listen to our Weekly Podcasts
  • Join our DeviceTalks Tuesdays Discussion

Copyright © 2022 WTWH Media, LLC. All Rights Reserved. Site Map | Privacy Policy | RSS

Search Medical Design & Outsourcing

  • Home
  • Medical Device Business
    • Mergers & Acquisitions
    • Financial
    • Regulatory
  • Applications
    • Cardiovascular
    • Devices
    • Imaging
    • Implantables
    • Medical Equipment
    • Orthopedic
    • Surgical
  • Technologies
    • Contract Manufacturing
    • Components
    • Electronics
    • Extrusions
    • Materials
    • Motion Control
    • Prototyping
    • Pumps
    • Tubing
  • Med Tech Resources
    • DeviceTalks Tuesdays
    • Digital Editions
    • eBooks
    • Manufacturer Search
    • Medical Device Handbook
    • MedTech 100 Index
    • Podcasts
    • Print Subscription
    • The Big 100
    • Webinars / Digital Events
    • Whitepapers
    • Video
  • 2022 Leadership in MedTech
    • 2022 Leadership Voting!
    • 2021 Winners
    • 2020 Winners
  • Women in Medtech