Active drawer test of the Knee |Quadriceps drawer test

What is the drawer test of the knee?

• This test is also known as the quadriceps drawer test .

• The active drawer test is used to the knee assessment for the doctor / sports therapist or physical therapist .
• It is used to the check for the PCL injury (Posterior Cruciate Ligament Injury)
• It is might to be used to for the along with to the Lachman test & pivot shift test .

What is the Purpose of this test ?

• This test is used to the check of the integrity of to the Posterior cruciate ligament (PCL) .
• It is also used for the check of the one – plane anterior instability .

How to perform of this test ?

• Test position of the patient is supine .
• In the supine position with to the hip flexion at 45 degrees & knee flexion at 90 degrees & feet is flat on the plinth.
• Then examiner is sits on to the toes for the test of to the extremity which is help to the stabilize the body.
• Then the examiner is grasps the proximal lower leg & distally to the tibial plateau & tibiofemoral joint line.
• Then do the the patient is actively contract of their quadriceps muscle
• It is perform like as the isometric test .

Clinical Note of this test :

• Examination of this test is perform with to the particular care because of that the start position is do the result into the false-positive of to the anterior drawer test .
• Which is give the result of the anterior cruciate ligament if to the posterior sag which is indicate to the posterior cruciate problem ; it is unnoticed to the before of the test is started.
• If to the minimal / no swelling is present so that the sag is evidence so because of this obvious concavity which is distal to the patella.

Interpretation of this test :

• Positive test is occurs when the patient’s tibia is shifts to the forward.

What is Diagnostic Accuracy of this test ?:

• Sensitivity of this test = 0.54
• Specificity of this test = 0.97
• Positive Likelihood Ratio [ +LR ] of this test= 18
• Negative Likelihood Ratio [-LR ] of this test = 0.47

What is Importance of this Test:

• this test basically starts to the initial position of to the tibial drop of the back sign.
• Into the a patient with to the intact of the PCL, then of the one fires is to the quadriceps mechanism at to the 90° degree of the knee flexion & the knee is not to move the forward noticeably.
• In to the patients who have to PCL tear, when to the fires of the quadriceps mechanism , it is pulls through to the patella / patellar tendon & ultimately on to the tibial tubercle which is pull to the tibia back onto the reduced position.
• it is a principle of behind to the quadriceps active test.