The anterior cruciate ligament (ACL) is the major stabilizing ligament of the knee. The ACL is located in the center of the knee joint and runs from the femur (thigh bone) to the tibia (shin bone), through the center of the knee. In this position, it functions to prevent a buckling type of instability of the knee. It is important for daily functions activity and sports.

How does ACL Injury Occur?

Usually the tearing of the ACL occurs with a sudden direction change or when a deceleration force crosses the knee. The patient often feels or hears a popping sensation, has the rapid onset of swelling, and develops a buckling sensation in the knee when attempting to change direction.


Initially, the symptoms are pain and fairly immediate swelling. After the pain and swelling subsides, patients complain of instability or a feeling of insecurity. The knee feels loose. Some people live in fear of their knee giving out because they are unable to predict the motions that cause the instability.

Diagnosis & Treatment

Orthopaedic Surgeons may conduct physical tests and take X-rays or an MRI to determine the extent of damage to your ACL. Most of the time, you need reconstruction surgery. HOSMAT is the only hospital to have a KT 1000 ortho meter in India. This instrument helps in the diagnosis of the ACL Tear. The doctor replaces the damaged ACL with strong, healthy tissue. A strip of tendon from under your knee cap (patellar tendon) or hamstring may be used. The doctor threads the tissue through the inside of your knee joint with the arthroscopic method, without opening the knees and secures the end to your thighbone and shinbone.

In a few cases the ACL is torn cleanly from the bone and it can be repaired. People over 50 years of age and People with less activity may be treated non surgically with good physiotherapy and muscle strengthening exercises.