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Skeletal Radiology

, Volume 35, Issue 5, pp 275–281 | Cite as

Forearm interosseous membrane trauma: MRI diagnostic criteria and injury patterns

  • Joseph C. McGinleyEmail author
  • Neil Roach
  • Brendon C. Hopgood
  • Karl Limmer
  • Scott H. Kozin
Scientific Article

Abstract

Objective

Define criteria for interosseous membrane (IOM) injury diagnosis using MRI, and characterize patterns of IOM disruption following forearm trauma. Our hypothesis is that most IOM injuries occur along the ulnar insertion, and MRI should be obtained following forearm trauma to assess IOM competency.

Design

Sixteen cadaver forearms were subjected to longitudinal impact trauma. Prior to and following injury, MR images were examined by a board-certified musculoskeletal radiologist using pre-defined criteria for determining IOM integrity. Each specimen was dissected and the viability/pattern of injury examined. The MRI and dissection results were compared using a double-blinded methodology.

Results

Eight of the 16 specimens demonstrated IOM trauma. Seven specimens demonstrated complete IOM disruption from the ulnar insertion, and one revealed a mid-substance tear with intact origin and insertion. The dorsal oblique bundle was disrupted in four specimens. MRI analysis identified IOM injury in seven of the eight forearms. The injury location was correctly identified in six specimens when compared to dissection observations. MRI determination of IOM injury demonstrated a positive predictive value of 100%, a negative predictive value of 89%, a sensitivity of 87.5% and a specificity of 100%.

Conclusion

Our findings demonstrate the accuracy of MRI in identifying IOM disruption, and its ability to localize specific injuries in a clinically relevant model of forearm trauma. The injury patterns demonstrated most lesions occurred along the IOM’s ulnar insertion, and in half of the injured specimens there was concomitant dorsal oblique bundle disruption.

Keywords

Interosseous membrane Soft tissues Ulna Radius Magnetic resonance Trauma 

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Copyright information

© ISS 2006

Authors and Affiliations

  • Joseph C. McGinley
    • 1
    Email author
  • Neil Roach
    • 2
  • Brendon C. Hopgood
    • 3
  • Karl Limmer
    • 4
  • Scott H. Kozin
    • 5
  1. 1.Department of RadiologyStanford University Medical CenterStanfordUSA
  2. 2.Department of RadiologyHospital of the University of PennsylvaniaPhiladelphiaUSA
  3. 3.Department of SurgeryAlbert Einstein Medical CenterPhiladelphiaUSA
  4. 4.Temple University School of MedicinePhiladelphiaUSA
  5. 5.Temple University and Pediatric Hand & Upper Extremity SurgeonShriners Hospital for ChildrenPhiladelphiaUSA

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