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Knee

Lateral Extra-Articular Procedure (LEAP)

A lateral extra-articular procedure (LEAP) is a surgical technique used to improve stability in the knee; most commonly performed alongside anterior cruciate ligament (ACL) reconstruction. The procedure focuses on the outer (lateral) side of the knee and is designed to control excessive rotational movement that can persist even after a standard ACL reconstruction.

The ACL is the primary ligament that prevents the shinbone from sliding forward and controls rotation of the knee. However, in some patients, especially those with high-demand athletic activity or specific injury patterns, ACL reconstruction alone may not fully restore rotational stability. This is where LEAP becomes important. It acts as a secondary stabilizer, reinforcing the knee and reducing the risk of ongoing instability.

LEAP is not a replacement for ACL reconstruction. It is an additional procedure performed at the same time to address specific mechanical issues that contribute to instability. The goal is to restore a more natural and controlled movement of the knee, particularly during cutting, pivoting, and rapid directional changes.

LEAP works by reinforcing the structures on the outer side of the knee to limit excessive internal rotation of the tibia, which is a key component of knee instability after ACL injury. Even when the ACL is surgically reconstructed, some patients continue to experience a sensation of the knee “giving way,” especially during high-level activity. This is often due to residual rotational laxity that the ACL graft alone cannot fully control.

The procedure typically involves using a strip of the patient’s own tissue, often from the iliotibial band, which runs along the outside of the thigh. This tissue is carefully redirected and secured to create a stabilizing effect. By doing this, Dr. Gazzaniga adds an extra layer of control to the knee’s rotational movement.

The effect is mechanical and protective. LEAP reduces strain on the ACL graft by sharing the load during movement. This is particularly important during activities that place high stress on the knee, such as sports that involve pivoting, jumping, or sudden stops. By offloading some of the stress from the ACL reconstruction, LEAP may lower the risk of graft failure.

Another important function of LEAP is improving overall knee confidence. Patients who experience instability often hesitate to return to activity because they do not trust their knee. By enhancing stability, LEAP helps restore that confidence and allows for a safer return to sports and physical activity.

LEAP is not performed on every patient undergoing ACL reconstruction. It is reserved for specific situations where the risk of persistent instability or reinjury is higher. The decision to include LEAP is based on a combination of patient factors, injury characteristics, and physical examination findings.

One of the most common reasons LEAP is considered is in patients who have high-grade rotational instability. This is often identified during a physical exam using specific tests that assess how much the knee shifts during movement. If the knee demonstrates excessive rotation, adding a lateral procedure can significantly improve outcomes.

LEAP is also commonly recommended for athletes who participate in high-risk sports. These include sports that involve frequent cutting, pivoting, or rapid changes in direction, such as soccer, basketball, football, and skiing. In these individuals, the demands placed on the knee are substantial, and additional stabilization can reduce the risk of reinjury.

Younger patients are another group where LEAP may be considered. Studies have shown that younger, active individuals have a higher rate of ACL graft failure after reconstruction. Adding a lateral extra-articular procedure can provide additional protection during the critical healing period and beyond.

Patients undergoing revision ACL surgery are also strong candidates for LEAP. If a previous ACL reconstruction has failed, it often indicates that additional stabilizing support is needed. In these cases, LEAP can address underlying issues that contributed to the initial failure, such as persistent rotational instability.

Certain anatomical factors may also influence the decision. For example, patients with generalized ligament laxity or specific structural variations in the knee may benefit from the added stability that LEAP provides. These factors are carefully evaluated by the surgeon during the planning process.

The use of LEAP reflects an evolving understanding of knee stability. Traditional ACL reconstruction focuses on restoring the primary ligament, but it does not always address the complex biomechanics of the knee. Sports Orthopedic surgeons like Dr. David Gazzaniga recognize that rotational control involves multiple structures, not just the ACL.

By incorporating LEAP into selected cases, Dr. Gazzaniga can provide a more comprehensive solution. The approach is individualized, meaning it is tailored to the specific needs of each patient rather than applied universally. This allows for better outcomes while avoiding unnecessary procedures in patients who do not need additional stabilization.

The procedure is typically performed through small incisions and is added to the ACL reconstruction without significantly increasing surgical time. Advances in surgical technique have made LEAP more precise and reproducible, with a focus on restoring natural knee mechanics while minimizing complications.

When appropriately indicated, LEAP can significantly improve knee stability and reduce the risk of reinjury. Patients often report a stronger, more controlled knee during activity, especially in situations that previously caused instability.

Return to sports is carefully guided and typically occurs over several months. The added stability provided by LEAP can support a safer transition back to high-level activity, but recovery timelines remain similar to standard ACL reconstruction.

LEAP is not necessary for every patient, and it is not a guarantee against future injury. However, in the right clinical setting, it offers a meaningful advantage by addressing a known limitation of isolated ACL reconstruction. The result is a more stable knee, improved function, and a lower likelihood of repeat injury in high-risk individuals. Contact Dr. David Gazzaniga to schedule a consultation. His goal is to get you back in the game.

At a Glance

Dr. David Gazzaniga

  • Over 25 years of experience caring for professional athletes in the NHL, NFL, MLB, and the Olympics.
  • Division Chief of Sports Medicine at the Hoag Orthopedic Institute
  • Board-certified with a Certificate of Added Qualification (CAQ) in Sports Medicine and triple fellowship-trained
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