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Hyperextended knee: Cause of serious injury?By Mayo Clinic staff
Original Article: http://www.mayoclinic.com/health/hyperextended-knee/AN00283
- With Mayo Clinic physical medicine and rehabilitation specialist
Edward R. Laskowski, M.D.read biographyclose window
Edward R. Laskowski, M.D.Edward R. Laskowski, M.D.
Dr. Edward Laskowski is certified by the American Board of Physical Medicine and Rehabilitation, including subspecialty certification in sports medicine, and is a fellow of the American College of Sports Medicine. He is co-director of the Mayo Clinic Sports Medicine Center and a professor at College of Medicine, Mayo Clinic.
He has been on the staff of Mayo Clinic since 1990 and specializes in sports medicine, fitness, strength training and stability training. He works with a multidisciplinary team of physical medicine, rehabilitation and orthopedic specialists, physical therapists, and sports psychologists.
Dr. Laskowski is an elite-level skier and an avid hiker, cyclist and climber. He approaches sports medicine from the perspective of a physician and an athlete.
In 2006, President George W. Bush appointed Dr. Laskowski to the President's Council on Physical Fitness and Sports, and he has received a Distinguished Service Award from the Department of Health and Human Services for his contribution to the Council.
Dr. Laskowski was a member of the medical staff of the Olympic Polyclinic at the 2002 Winter Olympics in Salt Lake City and has provided medical coverage for the Chicago Marathon. He serves as a consulting physician to the National Hockey League Players' Association and is a featured lecturer at the American College of Sports Medicine's Team Physician Course.
Dr. Laskowski, a Cary, Ill., native, has contributed to Mayo Clinic's CD-ROM on sports, health and fitness, a website guide to self-care, and hundreds of Mayo Clinic articles and booklets in print and online. He is a contributing editor to the "Mayo Clinic Fitness for EveryBody" book, and he has presented lectures throughout the world on health, fitness and sports medicine topics. His teaching expertise has been recognized by his election to the Teacher of the Year Hall of Fame at Mayo Clinic.
"There are many myths and misconceptions about exercise and fitness in general, and also many traditions that don't stand up to scientific scrutiny," he says. "My goal is to provide the most up-to-date and accurate information on sports medicine and fitness topics in a way that you can practically incorporate into your life."
Hyperextended knee: Cause of serious injury?
My daughter hyperextended her knee yesterday at school. Can this injury be serious?
from Edward R. Laskowski, M.D.
A hyperextended knee occurs when the knee is bent backward, often as a result of landing wrong after a jump. A hyperextended knee can damage ligaments, cartilage and other stabilizing structures in the knee.
Young children have softer bones because they're still growing, so a hyperextended knee can result in a chip of bone being pulled away from the main bone when the ligaments stretch too far. In older children and adults, forceful hyperextension may tear one of the knee ligaments, particularly the anterior cruciate ligament (ACL).
A knee injury severe enough to cause swelling, pain or instability should be evaluated by a doctor immediately. Even if the injury doesn't need surgical repair, physical therapy may be needed to help restore leg strength and stability.
- Green NE, et al. Skeletal Trauma in Children. 4th ed. Philadelphia, Pa.: Saunders Elsevier; 2008. http://www.mdconsult.com/books/page.do?eid=4-u1.0-B978-1-4160-4900-5..10020-2--s0440&isbn=978-1-4160-4900-5&sid=1303293159&uniqId=331963592-4#4-u1.0-B978-1-4160-4900-5..10020-2--s0450. Accessed April 30, 2012.
- DeLee JC, et al. DeLee & Drez's Orthopaedic Sports Medicine: Principles and Practice. 3rd ed. Philadelphia, Pa.: Saunders Elsevier; 2010. http://www.mdconsult.com/books/about.do?about=true&eid=4-u1.0-B978-1-4160-3143-7..X0001-2--TOP&isbn=978-1-4160-3143-7&uniqId=230100505-57. Accessed April 30, 2012.
- Marx JA, et al. Rosen's Emergency Medicine: Concepts and Clinical Practice. 7th ed. Philadelphia, Pa.: Mosby Elsevier; 2010. http://www.mdconsult.com/books/about.do?about=true&eid=4-u1.0-B978-0-323-05472-0..X0001-1--TOP&isbn=978-0-323-05472-0&uniqId=230100505-57. Accessed April 30, 2012.
- Hergenroeder AC. Treatment of knee injuries in the young athlete. http://www.uptodate.com/index. Accessed April 30, 2012.