cruciate ligament (ACL) tear is an injury to the ligament in your knee that
keeps your shinbone from sliding forward.
The ACL stabilizes
your knee, so tearing it either partially or completely can cause pain and
swelling. It's a common injury among athletes. Ignoring a torn ACL can
potentially lead to further injury.
ACL injuries are
commonly seen in basketball, football, and soccer players, who often jump or
pivot in reaction to other athletes. Ignoring a torn ACL can potentially lead
to further knee injury.
What Causes an ACL Tear? Who Is at Risk?
ACL tears typically
occur in highly active people. Certain movements tend to cause ACL injuries:
- landing flat-footed from a jump
- overextending your knee joint
- changing direction fast
- changing speed while running
You can also injure
your ACL if the side of your knee is hit. This might happen in a car accident
or a football tackle.
ACL tears are
typical sports injuries. Basketball, skiing, football, and soccer are a few of
the sports that make athletes vulnerable to knee injuries, because these
activities involve jumping or pivoting. According to the American Academy of Orthopedic Surgeons, ACL injuries are two to 10 times
more likely to occur in female athletes than in male athletes.
Recognizing the Symptoms of an ACL Tear
People who hurt
their ACLs usually hear a popping sound as soon as the tear occurs. Swelling of
the knee generally happens within six hours of injury and may be quite severe.
The condition can be painful, especially when walking, twisting, or turning on
your injured leg. You’ll also generally feel that your knee is unstable, as if
it’s going to give out from underneath you.
How Is an ACL Tear Diagnosed?
An ACL tear needs
to be examined by an orthopedic surgeon or knee specialist. The doctor will
review your medical history and ask how you injured yourself. The physical exam
typically includes observing your knee’s stability and range of movement. Your
doctor may also order the following tests:
- An X-ray will help determine
whether there are any broken bones.
- An MRI helps to specifically
diagnose an ACL tear and look at the other ligaments and structures in your
- If there are concerns about small
bone fractures, you might need a CT scan of your knee.
How Are ACL Tears Treated?
Treatment for an
ACL tear depends on the extent of your injury and your specific goals and
needs. Some people can continue their normal lives with an ACL injury but may
later suffer from other knee injuries. For an athlete, surgery and physical
therapy may be the best answers for resuming athletics as quickly as possible.
In all cases, it’s
important to see a healthcare provider immediately to ensure that there are no
broken bones or damage to other ligaments. If your knee is blue, seek medical
help immediately, as your blood vessels may be injured.
How Is ACL Surgery Conducted?
Sometimes this type
of injury requires a complete surgical reconstruction using a tendon from the
patella (kneecap) or hamstring. Using donor tissue is also an option.
When you first
injure yourself, your doctor may recommend an over-the-counter pain reliever
(like ibuprofen). If you’re having surgery, ask your doctor about the required
medications for both before and after your surgery. Prior to surgery, you may
be told to stop taking medicines that interfere with your blood’s ability to
clot, like aspirin.
you may need up to six months of physical therapy to regain your full range of
motion and leg strength.
surgeries usually have good outcomes, allowing you to have less pain and more
leg strength and knee stability. With proper treatment, you should have a good
recovery, but arthritis is a potential risk to the knee. However, it may be
worse if surgery is not performed, depending on whether the person returns to
Can ACL Tears Be Prevented?
A strong and agile
body reduces your risk for an ACL tear. If you’re an athlete, learn and
practice preventive techniques for reducing the pressure on your knees. Landing
on the balls of your feet rather than flat-footed, for example, allows your
calf muscles to support your body. This decreases unnecessary pressure on your