How to determine if the anterior cruciate ligament is torn

Apr 10, 2023 Source: Cainiu Health

Dr. Lin Yunfei

Introduction

Methods to diagnose anterior cruciate ligament (ACL) rupture include symptoms, physical examination, and imaging tests. Symptoms may include knee pain, a sensation of snapping, hearing a popping sound at the time of injury, knee swelling, and joint bleeding. During physical examination, the doctor holds the lower end of the femur with one hand and the upper end of the tibia with the other, then applies opposing forces; excessive forward movement indicates ACL rupture. Arthroscopy and MRI of the knee joint can also be used for diagnosis.

Methods for diagnosing anterior cruciate ligament (ACL) rupture include symptom assessment, physical examination, and imaging studies.

1. Symptoms

When the anterior cruciate ligament ruptures, sudden knee pain and a feeling of knee instability occur. Some patients may feel a snapping sensation in the knee or even hear a popping sound at the moment of injury. Swelling of the knee joint and obvious internal bleeding within the joint are also common symptoms.

2. Physical Examination

The patient lies flat with the knee flexed. The doctor grasps the distal femur with one hand and the proximal tibia with the other, then applies opposing forces. If the ACL is ruptured, excessive forward movement (anterior translation) of the tibia relative to the femur will be observed.

3. Imaging Studies

Arthroscopic examination of the knee joint, performed under guidance from a qualified physician, may reveal bleeding or small blood clots caused by ACL rupture. Magnetic resonance imaging (MRI) of the knee joint can accurately diagnose the condition and assess the severity of the injury.

In addition, X-ray imaging of the patient's knee joint may also assist in diagnosis. Once diagnosed, prompt treatment is essential to prevent worsening of symptoms.

View All

How to treat tendon and ligament injuries

1. Daily care: It is recommended to get plenty of bed rest, properly protect the affected area, and apply local heat therapy two days after the injury. 2. Medication: Take medications such as meloxicam granules, lornoxicam tablets, and celecoxib capsules. 3. Surgical treatment: Patients should promptly go to the hospital for surgical procedures such as ligament reconstruction or early repair surgery for anterior cruciate ligament rupture.

View Full Answer

Twisted knee with a cracking sound, swelling and pain, unable to walk.

A cracking sound accompanied by swelling, pain, and inability to walk after twisting the knee is usually caused by meniscus injury, knee osteoarthritis, anterior cruciate ligament rupture, patellar dislocation, or fractures. Treatment depends on the specific condition. In addition, it could also be caused by bone tumors. It is recommended that patients seek timely medical evaluation at a hospital once such symptoms occur.