Lachman Test

Manual Maneuver

Bend the knee to about 30 degrees. Then, stabilize the femur with one hand. Place the other hand behind the proximal tibia at the level of the joint line and then pull forward.
Grade the motion based on the amount of anterior translation.

Normal laxity is 0

Grade 1: Less than 0.5 cm of translation

Grade 2: 0.5-1.0 cm of translation

Grade 3: 1.0-1.5 cm of translation

Also assess the end point. Is it soft or firm?

It is further important to check the opposite knee and compare it to the injured one to gain a better understanding of the patient's normal translation or laxity.