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Related Concept Videos

Knee Joint01:23

Knee Joint

The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris group...
Bones of the Lower Limb: Femur and Patella01:16

Bones of the Lower Limb: Femur and Patella

The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the neck...

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Related Experiment Video

Updated: May 31, 2026

A Novel Application of Musculoskeletal Ultrasound Imaging
10:53

A Novel Application of Musculoskeletal Ultrasound Imaging

Published on: September 17, 2013

Ultra-low-velocity knee dislocations.

Frederick M Azar1, Jason C Brandt, Robert H Miller

  • 1University of Tennessee-Campbell Clinic, Department of Orthopaedic Surgery, Memphis, Tennessee, USA. fazar@campbellclinic.com

The American Journal of Sports Medicine
|July 16, 2011
PubMed
Summary
This summary is machine-generated.

Ultra-low-velocity knee dislocations in severely obese patients frequently cause neurovascular injuries. Surgical ligament reconstruction, particularly for the posterolateral corner, is associated with improved patient outcomes.

Related Experiment Videos

Last Updated: May 31, 2026

A Novel Application of Musculoskeletal Ultrasound Imaging
10:53

A Novel Application of Musculoskeletal Ultrasound Imaging

Published on: September 17, 2013

Area of Science:

  • Orthopedic Surgery
  • Traumatology
  • Biomechanics

Background:

  • Low-velocity knee dislocations typically occur during sports.
  • A subset of knee dislocations occurs during daily activities (ultra-low-velocity dislocations).
  • These ultra-low-velocity dislocations are more common in obese individuals.

Purpose of the Study:

  • To investigate the characteristics and outcomes of ultra-low-velocity knee dislocations.
  • To identify risk factors and associated injuries.
  • To evaluate the effectiveness of surgical intervention.

Main Methods:

  • Case series of 17 patients with knee dislocations during daily activities.
  • All patients were severely obese (average BMI 48).
  • Documented ligament, neurologic, and popliteal artery injuries; surgical interventions included reduction, stabilization, ligament reconstruction, and vascular repair.

Main Results:

  • All 17 patients sustained ligament injuries; 7 had neurologic injuries and 7 had popliteal artery injuries.
  • Surgical ligament reconstruction was associated with significantly better outcomes (e.g., HSS scores) compared to non-reconstruction.
  • Higher BMI correlated with an increased likelihood of combined neurovascular injury.

Conclusions:

  • Ultra-low-velocity knee dislocations in severely obese patients are linked to frequent neurovascular injuries.
  • Increasing BMI may increase the risk of combined neurovascular injury.
  • Surgical ligament reconstruction, especially posterolateral corner repair, appears to improve functional outcomes.