Floating patella test:
Let the patient straighten his sick leg. The doctor presses his palm on the suprapatellar bursa with the part between the thumb and the index finger against the superior aspect of the patella so as to make the liquid flow into the articular cavity, and vertically presses the patella with the index finger of the other hand. If there is a sensation of floating patella and also a feeling of collision between the patella and the condyle of femur, it is positive and indicated that there is dropsy in the articular cavity.

Test of sideways movement of knee joint:
Let the patient lie on his back with the knee straightened. The doctor holds up the lateral side of lower end of femur with one hand, and holds up the ankle with the other hand and pulls it outward so as to give an abduction tension to the medial accessory ligaments. If there is pain or sideways movement, it is positive and indicative of an injury of medial accessory ligaments. Repeat the process above for examining lateral accessory ligament.
      
Drawer test:
It is also called pushing-pulling test. Let the patient lie on his back with the knee flexed to the angle of 90°, and foot resting horizontally on the bed. The doctor stands in front of foot of the sick leg, holds the leg with two hands and pushes and pulls the leg forwards and backwards. An enlarged forward mobility indicates an injury of anterior cruciate ligament, and an enlarged backward mobility an injury of posterior cruciate ligament.

Test of traction of patella:
Let the patient straighten his sick leg. The doctor pushes and presses the patella towards distal direction with his thumb and index finger, and asks the patient to contract his quadriceps muscle of thigh. If there appears pain of the patella, it is positive and usually seen in strain of patella.

Rotating and squeezing test:
It is also called Mc. Murray’s sign. Let the patient lie on his back with his sick leg flexed. The doctor puts one hand on the superior part of the knee, holds the heel with the other hand, makes the knee flexed maximally, then makes abduction and intorsion of the leg, and makes the knee joint, straightened simultaneously. If there is flicking sound or pain, it is positive and indicative of the injury of lateral semilunar plate. Contrarily, if the adduction and extorsion with the leg straightened cause flicking sound or pain, it indicates the injury of medial semilunar plate.

Triturating and pulling test:
It is also called Apler’s sign. Let the patient lie in prone position with the knee flexed to the angle of 90°. The doctor puts his leg on the posterior aspects of lower end of the patient’s thigh for fixation. While holding the heel with his two hands and pressing down along direction of the longitudinal axis of the leg, the doctor makes abduction and extorsion or adduction and intorsion of the leg. If there appears pain or flicking sound, it is positive and indicative of the injury of lateral or medial semilunar plate. Lifting the leg up, the doctor makes abduction and extorstun or adduction and intorsion of the leg, if there appears pain, it indicates the injury of lateral or medial accessory ligaments.