Meniscus Repair

Meniscus Repair

Meniscus Repair is a minimally invasive surgical procedure used to stitch together a torn meniscus—the crescent-shaped cartilage that acts as a shock absorber in the knee. Unlike a meniscectomy, which trims the tear away, a repair aims to preserve the natural tissue to prevent long-term joint wear and premature arthritis.

When You Should Consider Meniscus Repair

• Presence of a "red zone" tear located in the outer 25% of the meniscus, where blood supply is rich enough for healing.

• Mechanical symptoms like knee locking, catching, or a painful clicking sensation.

• Younger age or an active lifestyle where preserving the joint's natural shock absorbers is critical.

• Tears occurring alongside an ACL injury, as repairing both simultaneously often improves healing outcomes.

• Persistent joint line tenderness that has not improved with rest or physical therapy.

Methods of Meniscus Repair

• All-Inside Repair: Performed entirely within the knee joint using tiny anchors and sutures, typically for tears in the back of the meniscus.

• Inside-Out Repair: The gold standard for large tears, involving flexible needles that pass sutures from the inside of the knee to be tied on the outside.

• Outside-In Repair: Sutures are passed from the outside skin through the meniscus to fix tears located in the front (anterior horn).

• Meniscal Root Repair: Re-anchoring the meniscus to the shinbone using small bone tunnels when it has detached from its primary attachment point.

• Fibrin Clot or Stem Cell Augmentation: Specialized biological techniques sometimes used to enhance the healing environment of the repair.

How Meniscus Repair Is Performed

• Diagnostic Mapping: The surgeon uses an arthroscope to grade the severity and location of the tear.

• Tissue Debridement: The frayed edges of the tear are "sanded" or smoothed to stimulate fresh blood flow to the area.

• Suture Placement: Using specialized needles or anchors, the surgeon precisely stitches the torn edges of the cartilage back together.

• Knot Security: The sutures are tied securely to ensure the meniscus remains stable under the natural pressure of the joint.

• Final Inspection: The surgeon checks the tension of the repair throughout a range of motion before draining the saline and closing the portals.

Pre-Procedure Preparation

• Fasting (NPO) for at least 12 hours prior to the surgery.

• Smoking cessation at least 6 weeks before the procedure to ensure adequate blood oxygenation for tissue healing.

• Confirmation of the tear's grade and location via a specialized knee MRI.

• Pre-operative coordination for crutches and a hinged knee brace to be used immediately following the surgery.

Tests Before Meniscus Repair

• Knee MRI: The primary diagnostic tool used to determine if a tear is in the "red zone" (repairable) or "white zone" (non-repairable).

• McMurray Test: A physical exam maneuver where the surgeon rotates the knee to identify the specific location of the tear.

• Joint Line Palpation: Checking for pinpoint tenderness along the space where the femur and tibia meet.

• Standard Blood Panels: To confirm the patient is a healthy candidate for general or regional anesthesia.

Life After Meniscus Repair

• Recovery is slower than a simple trimming because the tissue must physically grow back together.

• Patients are typically non-weight-bearing on crutches for 4 to 6 weeks to protect the delicate stitches.

• A hinged knee brace, often locked in a straight position, is worn for approximately 6 weeks.

• Bending the knee is usually restricted to 90 degrees for the first month to avoid putting shear force on the repair.

• Full return to high-impact sports like basketball or soccer generally takes 6 to 9 months of rehabilitation.

Benefits of Meniscus Repair

• Preserves the knee's natural shock-absorbing capacity, significantly reducing the risk of early-onset arthritis.

• Maintains the long-term structural stability of the knee joint.

• Offers a high success rate (85–90%), particularly when the repair is performed alongside an ACL reconstruction.

• Provides a superior long-term outcome for younger patients compared to removing the damaged cartilage.