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Meniscus tears

Categories
  • Joint/Tendon
  • Knee
Tags
  • knee injury
Knee Anatomy & Examination

Knee anatomy

Coronal view right knee

Coronal view right knee

Posterior (back of knee)

Axial view right knee

Meniscus injury biomechanics

ACL injury mechanism

Meniscus tears may be associated with ACL injuries.

Rotation mechanism of ACL injury: Knee flexion with external femur rotation

Injury mechanism:
  • Rotation injury
  • May be associated with cruciate/collateral ligament injury
  • Ramp meniscus tear is a posteromedial meniscus peripheral tear
  • Degenerative meniscal tear may be underlying with minor traumatic injury-causing tear
Symptoms:
  • Knee pain
  • Knee swelling
  • Clicking
  • Associated features of concomitant cruciate or collateral ligament tears

Meniscus tear classification

Ultrasound limitations

Meniscus surgery principles

Arthroscopic surgery approach to meniscus tears

Download ASSIC Performance Fingerprint or Strength & Conditioning apps for rehab guidelines for post-meniscectomy surgery

apple app store  google play store

Surgical approach to meniscus injury

Surgical approach to meniscus injury

Ideal Indications for meniscal repair

Depend on the injury zone & tear characteristics

A good outcome for the following:
  • Tear > 1cm & <4 cm in length
  • Red-red zone
  • Vertical tears
  • Patient <40 years
  • No mechanical malalignment
  • Acute tears (<6 weeks)
  • Concurrent ACL reconstruction
MRI scan of meniscus showing Vascular zones

MRI scan of meniscus showing Vascular zones

Contributor:

Dr M Y Hassan

Learn More

References

  1. Meniscal Repair. Catherine Laible, Drew A. Stein, Daniel N. Kiridly. J Am Acad Orthop Surg 2013;21:204-213.
  2. Meniscal Allograft Transplantation. Jon K. Sekiya, Christopher I. Ellingson. J Am Acad Orthop Surg 2006; 14:164-174.
  3. Meniscal Injury: 1. Basic science and evaluation. Patrick E. Greis, Davide D. Bardana, Michael C. Holmstrom and Robert T. Burks. J Am Acad Orthop Surg 2002; 10:168-176.
  4. Meniscal tears and discoid meniscus in children: diagnosis and treatment. Dennis E. Kramer, Lyle J. Micheli. J Am Acad Orthop Surg 2009; 17:698-707.

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