The Lechmann test is an examination of the cruciate ligament for the diagnosis of the anterior or posterior bundle of the cruciate ligament. The positive rate of the test can be increased, which is helpful for judging the anterior or posterior bundle injury of the anterior cruciate ligament.

Basic Information

Specialist classification: growth and development check classification: other inspection

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

Analysis results:

Below normal:
Restricted ligament development

Normal value:
The knee joint is 15~30 degrees in the knee: 0-0.5cm

Above normal:
Cruciate ligament dysplasia



Tips: Keep a normal mindset. Normal value

The anterior cruciate ligament of the knee joint at 15 to 30 degrees of flexion is a stable ligament that restricts the anterior movement of the tibia. Normal is within 0.5 cm.

Clinical significance

Abnormal result

The test result is positive, suggesting that the anterior or posterior bundle of the anterior cruciate ligament is damaged and may have a fracture of the cruciate ligament.

People who need to be examined have abnormal pain in their knees.

Low results may be diseases: knee joint injury, knee dislocation precautions

Inappropriate crowd: None.

Taboo before inspection: no special contraindications.

Requirements for inspection: gentle manipulation, avoiding muscle tension and affecting the results of the examination.

Inspection process

The patient knees and knees 90°, the examiner sits lightly on the back of the affected side (fixed), grasps the upper part of the lower leg with both hands, pushes back, and then pulls forward. When the anterior cruciate ligament is broken, it can be pulled forward by more than 0.5cm; the posterior cruciate ligament fracture can be pushed back more than 0.5cm. The knee was placed at a flexion of 10° to 15° for testing.

Not suitable for the crowd

There are no specific taboos.

Adverse reactions and risks

Generally no complications occur.