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Sunsoochon Hospital

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Knee

home Knee Anterior Cruciate Ligament (ACL) Tear

Anterior Cruciate Ligament (ACL) Tear

The ACL is the primary ligament that prevents the anterior displacement of the tibia relative to the femur from the anterior side of the tibia. The ACL also has a secondary function of preventing the rotation of the tibia against varus and valgus forces.

Symptoms and Diagnosis

Patients may experience severe pain immediately after an ACL tear. This pain, however, usually subsides within minutes, resulting in a minor hemorrhagic arthrosis within one to two hours. Typically, an ACL tear can lead to instability in the knee, a drop foot-like sensation, frequent inflammations in the knee area. If these symptoms recur, it is best to visit a hospital for a proper diagnosis. ACL tears can be diagnosed with a physical examination and MRI. Physicians often look for other related injuries when diagnosing an ACL tear.
Lachman's test
Anterior drawer test

Treatment

Non-surgical treatment
In the case of a minor or partial rupture, non-surgical treatment may be considered as the primary treatment option. Thermal (ice) treatment, compression, and physical therapy may be used to control swelling, pain, and inflammation. This can be followed by a general strength training program for the lower extremities, including the thigh muscles.
Surgical treatment
Patients may consider a surgical reconstruction or allograft of the ACL depending on their age, gender, and occupation. Post-surgical rehabilitation also varies according to the type of surgical procedure. For a professional athlete, it typically takes a minimum of six months after an ACL tear to return to full activity.

Rehabilitation after the surgical reconstruction of an ACL tear

Stage-1 (week 1 ~ week 2)
In the case of a simple rupture, patients can begin walking progressively using crutches after the surgery. Patients will be prescribed exercises to contract the quadriceps and prevent muscle atrophy. Patients will be allowed to increase the range of motion (ROM) in the knee gradually (within 90 degrees).
Stage-3 (week 3 ~ week 6)
Patients will be prescribed OKC exercises within their pain threshold. Patients will be asked to recover more than 90 degrees in terms of ROM in the knee with passive flexion (without experiencing pain). Patients will be prescribed sensory training and cardiopulmonary endurance exercises.
Stage-3 (week 6 ~ week 12)
Patients will be expected to have recovered full range of motion and normal strength. Patients will be prescribed with full-scale muscle strengthening exercises.
Stage-4 (week 12 ~)
Patients will be prescribed additional training and functional exercise programs for specific sporting activities.
Patients will be allowed to start light jogging when they score 70% or higher on an isokinetic test.
Patients will be allowed to start plyometric training when they score 80% or higher on an isokinetic test.
For the general public, patients will be expected to score more 85% or higher on an isokinetic test and return to normal sporting activities in six months. Professional athletes will be expected to score 90% or higher and resume full sporting activities in six months.

하단 정보

B1, F3~F7, 76, Olympic-ro, Songpa-gu, Seoul, Republic of Korea / TEL : 1661-3379    l    +82-2-431-3379