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MCL injury: Update

8/22/2014

1 Comment

 
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A few weeks back I posted an article discussing a recent knee injury I sustained. In that post I outlined several important pieces of information often under-looked when rehab'ing a knee. As of last week, my rehabilitation was going great: I had returned to running for >1 hour, performing weighted squats, and only having pain at end-range flexion. This all changed 1 week ago when I returned to wake boarding for the first time. While performing a trick, I landed wrong and re-injured my knee. I experienced similar symptoms to my first injury: a pop, immediate pain, and swelling. Under the supervision of a nurse practitioner, we agreed it would be best for me to get an MRI to rule out ligament or osteochondral lesions (Phisikil 2006). 

The MRI impression (verbally per NP):
1) Meniscofemoral ligament rupture 2) MCL and ACL sprain (fortunately not torn) 3) Intact meniscus 4) No chondral lesions

Based off the impression, it appeared I dislocated my patella during the injury (unknown to me). Once again I needed to start conservative management. In this post I am going to do a brief knee anatomy review of the ACL and MCL as well as discuss conservative management of these injuries. 

Anterior Cruciate Ligament (ACL)
The ACL travels superiolaterally from the anterior intercondylar fossa of the tibia to the lateral femoral condyle. The two bundles of the ACL are the anteromedial (taut in flexion) and posterolateral bundles (taut in extension). Both ACL and PCL provide A-P and rotary stability to the knee. At 90 degrees flexion, the ACL resists anterior tibial translation. The blood supply to the ACL is the middle geniculate artery. It is comprised of 90% type I collagen and 10% type III collagen.
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Medical Collateral Ligament (MCL)
The MCL travels from the posterosuperior femoral condyle to the medial aspect of the tibia (posterior to the pes anserine insertion). The posterior fibers blend with the joint capsule and attach to the medial meniscus while the anterior fibers are separate from the joint capsule. The MCL provides primary resistance to valgus stresses. Blood supply to the MCL is both the superior and inferior medial geniculate arteries.
Conservative management of an MCL injury:
Non-operative management has been proposed as the mainstay treatment for MCL injuries (Phisikil 2006). With an isolated MCL injury, treatment consisting of protected ROM and progressive strengthening has been shown to produce excellent results. During the inflammatory phase, use the RICE principle to minimize pain and swelling. Use crutches until the individual can walk without a limp. As the patient progresses, both the stair climber and the bicycle ergometer are easy methods of maximizing ROM and minimizing stiffness. Once range of motion is restored, lower extremity progressive resistive exercises should be initiated.

I have been following the above protocol closely with good success. One consideration I need to take into account is the concomitant ACL sprain. Although the research is lacking on multi-ligament conservative management, I am guiding my ACL rehab by both pain and the knowledge of ACL stress/strain. Since my ACL is healing, I want to avoid exercises that place excessive strain across the ligament. At the same time, the ligament does need some stress to allow for normal collagen realignment. Thus far I have mainly been performing closed chain activities and riding the bicycle. Fortunately I do not have any meniscal or articular cartilage damage which allows me to progress loading at a faster rate. 

I hope this mini-anatomy and conservative management review was helpful.

-Jim 
References:
Phisitkul P., James S.L., Wolf B.R., Amendola A. (2006) MCL injuries of the knee: current concepts review. Iowa Orthopaedic Journal 26, 77-90
1 Comment
Christian
8/22/2014 01:51:17 am

Thanks, Jim - always helpful.

Reply



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  • Home
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  • Resources
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    • Business Minded Sports Physio Podcast
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    • Residency Corner
    • Special Tests >
      • Cervical Spine >
        • Alar Ligament Test
        • Bakody's Sign
        • Cervical Distraction Test
        • Cervical Rotation Lateral Flexion Test
        • Craniocervical Flexion Test (CCFT)
        • Deep Neck Flexor Endurance Test
        • Posterior-Anterior Segmental Mobility
        • Segmental Mobility
        • Sharp-Purser Test
        • Spurling's Maneuver
        • Transverse Ligament Test
        • ULNT - Median
        • ULNT - Radial
        • ULNT - Ulnar
        • Vertebral Artery Test
      • Thoracic Spine >
        • Adam's Forward Bend Test
        • Passive Neck Flexion Test
        • Thoracic Compression Test
        • Thoracic Distraction Test
        • Thoracic Foraminal Closure Test
      • Lumbar Spine/Sacroiliac Joint >
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        • Alternate Gillet Test
        • Crossed Straight Leg Raise Test
        • Extensor Endurance Test
        • FABER Test
        • Fortin's Sign
        • Gaenslen Test
        • Gillet Test
        • Gower's Sign
        • Lumbar Quadrant Test
        • POSH Test
        • Posteroanterior Mobility
        • Prone Knee Bend Test
        • Prone Instability Test
        • Resisted Abduction Test
        • Sacral Clearing Test
        • Seated Forward Flexion Test
        • SIJ Compression/Distraction Test
        • Slump Test
        • Sphinx Test
        • Spine Rotators & Multifidus Test
        • Squish Test
        • Standing Forward Flexion Test
        • Straight Leg Raise Test
        • Supine to Long Sit Test
      • Shoulder >
        • Active Compression Test
        • Anterior Apprehension
        • Biceps Load Test II
        • Drop Arm Sign
        • External Rotation Lag Sign
        • Hawkins-Kennedy Impingement Sign
        • Horizontal Adduction Test
        • Internal Rotation Lag Sign
        • Jobe Test
        • Ludington's Test
        • Neer Test
        • Painful Arc Sign
        • Pronated Load Test
        • Resisted Supination External Rotation Test
        • Speed's Test
        • Posterior Apprehension
        • Sulcus Sign
        • Thoracic Outlet Tests >
          • Adson's Test
          • Costoclavicular Brace
          • Hyperabduction Test
          • Roos (EAST)
        • Yergason's Test
      • Elbow >
        • Biceps Squeeze Test
        • Chair Sign
        • Cozen's Test
        • Elbow Extension Test
        • Medial Epicondylalgia Test
        • Mill's Test
        • Moving Valgus Stress Test
        • Push-up Sign
        • Ulnar Nerve Compression Test
        • Valgus Stress Test
        • Varus Stress Test
      • Wrist/Hand >
        • Allen's Test
        • Carpal Compression Test
        • Finkelstein Test
        • Phalen's Test
        • Reverse Phalen's Test
      • Hip >
        • Craig's Test
        • Dial Test
        • FABER Test
        • FAIR Test
        • Fitzgerald's Test
        • Hip Quadrant Test
        • Hop Test
        • Labral Anterior Impingement Test
        • Labral Posterior Impingement Test
        • Long-Axis Femoral Distraction Test
        • Noble Compression Test
        • Percussion Test
        • Sign of the Buttock
        • Trendelenburg Test
      • Knee >
        • Anterior Drawer Test
        • Dial Test (Tibial Rotation Test)
        • Joint Line Tenderness
        • Lachman Test
        • McMurray Test
        • Noble Compression Test
        • Pivot-Shift Test
        • Posterior Drawer Test
        • Posterior Sag Sign
        • Quad Active Test
        • Thessaly Test
        • Valgus Stress Test
        • Varus Stress Test
      • Foot/Ankle >
        • Anterior Drawer
        • Calf Squeeze Test
        • External Rotation Test
        • Fracture Screening Tests
        • Impingement Sign
        • Navicular Drop Test
        • Squeeze Test
        • Talar Tilt
        • Tarsal Tunnel Syndrome Test
        • Test for Interdigital Neuroma
        • Windlass Test