People who are afflicted by an abrupt
anterior cruciate ligament (ACL) injury are usually aware when it happens. Most of the time, they feel or hear like a pop sound and also the knee might give out, which can make them fall. With this particular kind of injury, the knee swells and the patient feels too much pain and there is loss of the capacity of the knee and the leg to move.
A typical ACL injury may cause minor or major tears of the ligament. There are various cases when there is a complete tear of the ligament. Also, some individuals experience a separation of the ligament from the lower or upper leg bone. There are times also when the ligament separates from a part of the bone or the rest of the bone. In case any of these take place, the lower bone of the leg gets dislocated forward on the upper bone, which then causes the knee to appear as though it was buckling or giving out.
As soon as the anterior cruciate ligament tears, the blood vessels around the torn ligament and blood penetrates the knee joint, which in turn causes swelling. In this case, even the doctor might find it hard to look at the injured knee due to the swelling.
Diagnosis of the tear in ACL might not be done during the injury. People tend to feel that the injury is not serious, particularly when the knee starts to feel and look better after a few days. The danger is that when the diagnosis of the injury is missed during the first examination, it may become a recurrent (chronic) and permanent ACL problem in which the knee moves abnormally and gives way occasionally.
The course of an ACL injury is determined by:
• The condition of the ACL before the injury. This consists of past injuries, ACL deficiency, partial tears, and degenerative changes as a person ages.
• The condition and health of all the knee structures before the injury.
• The extent of injury or injury brought on to the ACL.
• Various other injuries to the knee joint, the cartilage, or even to bones in the knee.
• The time of diagnosis. The later the ACL diagnosis is following the injury, the worse and more damaged the knee may be.
People who have minor injuries to their
anterior cruciate ligament generally start treatment with a rehabilitation program. Rehab exercises are designed to build versatility and power in the muscles on the quadriceps and also to tighten and strengthen hamstrings. Patients usually use crutches for a short period of time. Knee braces are normally used also to stabilize the knee after the injury, but they are not generally used for a long time.
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