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Anterior cruciate ligament (ACL) is located in the center of the knee, that controls rotation and forward movement of the tibia (shin bone).
ACL rupture is a common sports related injury but can also occur in road traffic accidents, falls and work-related injuries occurring during changing the direction rapidly and during a jerky action like landing from a jump or stopping suddenly.
It is more commonly seen in female athletes.
ACL injury is often associated with damage to articular cartilage, meniscus or other ligaments.
GRADES OF INJURY
ACL tear can be classified into three grades:
Minor tear around the ligament
Single Bundle tear but not completely torn
-Fibres of ligament are completely torn
-Ligament completely torn into two parts
-Increased anterior translation around the knee joint
-No end field
-No knee buckling
-Difficulty in walking
-Knee buckling +
-Fluid around the ligament
-Fluid around ligament
-Partial disruption of the ligament fibres
-Complete disruption of fibres
An ACL tear is usually sudden and is regularly seen in high thrust sports. It often occurs:
An athlete plants a foot & suddenly shifts direction
When a person lands on one leg
When the hyperextended knee is hit directly
Repeated stress on the knee
Sudden change of movement
Due to a fall
The rate of ACL injuries is three times higher in females than in males
Athletes ACL tear commonly occurs in high thrust sports like:
Previous ACL Injury
The risk of re-tearing a previously repaired ACL is 15% more than the risk of tearing a normal ACL.
The risk of ACL tear in the opposite knee is also higher once the injury has occurred in the first.
Due to the active lifestyle & high participation in sports activities, age group of 15-45 is a vulnerable group for ACL tear
When to see a doctor
A loud “popping sound” in the knee joint
Severe pain around the knee
Medical history and a physical examination.
During examination, clinician checks all the structures of the injured knee, and compare them with the non injured knee.
MRI scan of the knee. Commonly there is damage to the meniscus and other ligaments at the same time as the ACL.
X- ray are done to rule out bony avulsions a/w the tear.
Initial management after an injury to the knee can help in reducing pain & swelling. This can be achieved by R.I.C.E. model of self-home care of the injury:
Rest the muscles and avoid activity causing contraction of the injured region
Ice pack application for around 20 minutes can reduce pain and inflammation
Compression wrap around the knee
Elevation of the limb
Surgery is generally recommended if patient wishes to get back to sports but it is not absolutely
In general, this surgery is very successful, and it does stop the knee from repetitively dislocating and makes it feel stable.
Damaged Ligament is removed & is replaced with a segment of tendon. This replacement tissue is known as Graft.
necessary to have this ligament reconstructed. Treatment for an ACL tear depends on the patients need. Non-surgical treatment maybe effective for patients who having low functional demands such as elderly. Nonsurgical options include: [Text Box: ACL Reconstruction: In general, this surgery is very successful, and it does stop the knee from repetitively dislocating and makes it feel stable. Damaged Ligament is removed & is replaced with a segment of tendon. This replacement tissue is known as Graft.]
Sockets or tunnels are drilled into the thighbone and shinbone to accurately position the graft, which is then secured to your bones with screws or other fixation devices.
It is divided into 2 phases:
Acute Phase/Conservative Management
-To reduce swelling
-To maintain muscle power
-To maintain blood circulation
-Knee flexion/extension in sitting
-Knee bending in prone
-Weight transfers in standing
-Educating the patient about the rehabilitation protocol
-Quadriceps exercises to reduce swelling
-Knee Swinging for early return of function
-To improve posterior stability of the knee
-Straight leg raises
-Range of motion
-Knee extension exercises:
Prone hang exercise
-Knee bending exercises:
Passive knee bending
-Strengthening Exercises: Once 100 degrees of flexion has been achieved you may begin to work on muscular strength.