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Traumatic hip dislocation: early MRI findings

A Laorr1, A Greenspan, M W Anderson

  • 1Department of Radiology, University of California, Davis Medical Center, Sacramento 95817, USA.

Skeletal Radiology
|May 1, 1995
PubMed
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Magnetic resonance imaging (MRI) effectively detects injuries associated with traumatic hip dislocations, including bone contusions and ligament damage. This imaging modality is crucial for assessing associated soft tissue and bone abnormalities following femoral head dislocation.

Area of Science:

  • Orthopedic imaging
  • Traumatology
  • Radiology

Background:

  • Traumatic hip dislocation often involves associated injuries.
  • Conventional radiography may not fully delineate all injuries.
  • Magnetic resonance imaging (MRI) offers detailed visualization of soft tissues and bone.

Purpose of the Study:

  • To present early magnetic resonance imaging (MRI) findings in traumatic femoral head dislocation.
  • To identify associated injuries with therapeutic or prognostic significance.
  • To compare MRI's efficacy against conventional radiography for detecting these injuries.

Main Methods:

  • Prospective MRI of both hips in 18 patients (average age 30.5 years) within 5 weeks of dislocation.
  • Imaging included axial T1, coronal T1, and coronal T2* (MPGR) sequences.

Related Experiment Videos

  • Retrospective evaluation by three radiologists for bone, cartilage, joint space, and soft tissue abnormalities.

    • Main Results:

    • All patients had joint effusion or hemarthrosis.
    • Femoral head contusions, fractures, and osteochondral defects were observed.
    • Associated injuries included labral tears, ligamentum teres entrapment, iliofemoral ligament injury, and extensive muscle injuries.

    Conclusions:

    • MRI effectively identifies and quantifies muscle injury and joint effusion accompanying hip dislocations.
    • MRI is valuable for demonstrating trabecular bone contusion and iliofemoral ligament injury.
    • MRI provides superior delineation of associated injuries compared to conventional radiography.