The Anterior Drawer Test for Your ACL

Test to see if your ACL may be torn.

An ACl tear may be confirmed with the Anterior Drawer Test.
The Anterior Drawer Test is used to help determine if you may have an ACL sprain. Brett Sears, PT, 2013

The Anterior Drawer Test for anterior cruciate ligament (ACL) stability is a special test for your knee. It is designed to help you determine if you have sprained your ACL. It is often used by your physical therapist or doctor after a knee injury to test the integrity of your ACL.

Your knee is a complex hinge type joint that is comprised of the articulation of your femur (thigh), your tibia (shin bone), and your patella (knee cap).

There are several muscular attachments that help move your knee joint. The major muscles around your knee are the quadriceps and the hamstrings. Many different ligaments help to provide support to your knee.

The ACL is a major ligament in your knee that keeps your shin bone from sliding and gliding forward in relation to your thigh. Injury such as a sprain to your ACL may cause significant knee instability and prevent you from participating in high level sports that require stopping and starting, running, and jumping.

Symptoms of an ACL Tear

If you have injured your knee, there are several signs and symptoms that may indicate your ACL is sprained. These include, but are not limited to:

  • Knee pain
  • Swelling in your knee
  • Difficulty bending or straightening your knee
  • Difficulty walking or putting your weight onto your leg
  • A feeling of your knee giving out

If you suspect that you have torn your ACL, then you must see your doctor or healthcare practitioner right away.

He or she can perform the necessary tests to determine the severity of your knee injury.

Perform the Anterior Drawer Test for Your ACL

To help you decide if your ACL is sprained, you can perform the Anterior Drawer Test. To perform the test, you must have another person like a friend or family member help you.

Here is how you do it:

  • Lie on your back with your injured knee bent and your foot flat on the floor.
  • Have your friend sit gently on your foot so it does not move.
  • Have your friend grasp your knee with her thumbs in the front of your knee and her fingers behind your knee. Your friend's fingers should be tucked up into the bent part of your knee and her thumbs should be on the front part of your upper shin.
  • Have your friend gently pull your shin bone forward while watching how far it moves.
  • Repeat the test on your healthy knee.

If your shin bone slides forward significantly more on your injured knee as compared to your uninjured knee, then you may have sprained or torn your ACL. You must see your doctor immediately to confirm your suspicions.

Next Steps

If your Anterior Drawer Test is positive, meaning that you suspect an ACL tear, you should go to your doctor. He or she can perform more specific tests to confirm or reject the diagnosis. He or she may also give you various treatment options, including:

Of those options, a visit to your physical therapist is a reasonable first step in the treatment of your problem. He or she can give you strategies to work on improving your knee range of motion (ROM) and strength, and you can work on improving your ability to walk, run, and jump.

If you elect to have ACL surgery, you will likely benefit from physical therapy to help rehabilitate your knee after the procedure. Be sure to speak with your doctor to help you decide on the right treatment for you.

If you have injured your knee and suspect you may have sprained your ACL, then the Anterior Drawer Test may help you determine if your ACL is actually torn and if you need further medical care.

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