The grinding test is also called "knee joint rotation pulling test", "rotary extrusion test", "apley test". It is knee flexion 90°, knee flexion to the maximum, check whether pain occurs is often used for collateral ligament injury or meniscus rupture, and can be positioned. When the examination, the doctor's movements should not be too rough, so as not to make the damage worse. Pay attention to the identification of the medial and lateral collateral ligament injury and the injury of the patellar tendon.

Basic Information

Specialist classification: growth and development check classification: physical examination

Applicable gender: whether men and women apply fasting: not fasting

Analysis results:

Below normal:

Normal value:
no

Above normal:

negative:
Negative: no pain appeared.

Positive:
If pain occurs, it is positive. Mainly seen in the collateral ligament injury or meniscus rupture, and can be positioned.

Tips: The action should not be too rough, so as not to make the damage worse. Normal value

The test result was negative: no pain occurred.

Clinical significance

Abnormal results: If the pain occurs, it is positive. The examiner holds the foot of the affected limb with both hands, so that the knee flexes 90°, the calf is upright, and then the knee is pressed down and rotated outward and inward. At the same time, the knee joint is flexed to the maximum, and then the lower limb is straightened, and if the pain occurs, it is positive. The positive test is mainly seen in the collateral ligament injury or meniscus rupture, and can be located.

People who need to be examined: people with abnormal pain in their knees.

Positive results may be disease: ulnar collateral ligament injury of the metacarpophalangeal joint of the thumb, lateral ligament injury of the knee, meniscus injury of the knee joint, and meniscus injury

Taboo before inspection: no special contraindications.

Requirements for inspection: The action should not be too rough, so as not to make the damage worse. Pay attention to the identification of the medial and lateral collateral ligament injury and the injury of the patellar tendon.

Inspection process

First, the patient is prone, and the contralateral knee flexes 90°. The examiner has a slight extension of the affected limb and puts the knee on the back side of the patient's thigh. The two hands hold the foot, pull up, and rotate outward and inward.

Not suitable for the crowd

Inappropriate crowd: None.

Adverse reactions and risks

Nothing.