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Pediatric Radiology

, Volume 26, Issue 9, pp 629–634 | Cite as

Ultrasonographic evaluation of the anterior recess in the normal hip: A prospective study on 166 asymptomatic children

  • Wiltrud K. Rohrschneider
  • Gabriele Fuchs
  • Jochen Tröger
Article

Abstract

Purpose. To redefine the ultrasonographic features of the normal hip joint in children and to establish a normal value for the neck-capsule distance (NCD) of its anterior recess.Materials and methods. 332 hips of 166 asymptomatic children were examined sonographically. In a sagittal section plane the maximum distance between the anterior surface of the femoral neck and the anterior limit of the articular capsule (NCD-A) was measured.Results. The hypoechoic synovial membrane occupying the anterior recess could always be differentiated from the capsule. An additional thin layer of synovial fluid was detected in 12 % of probands. The configuration of the capsule varied with different rotation positions of the legs. In small children the mean NCD-A increased from 2.5 mm at 65 cm height to 5 mm at 100 cm height. In larger children the mean NCD-A was 5.5 mm. The mean right-to-left difference was 0.5 mm with a pathological limit of 2 mm.Conclusions. The pathological limit of the NCD-A increases from 3.5 to 7.5 mm in relation to the height. Sonographic investigation of the pediatric hip joint must include detailed demonstration of anatomical structures to avoid misinterpretations.

Keywords

Femoral Neck Synovial Fluid Section Plane Anterior Surface Sagittal Section 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • Wiltrud K. Rohrschneider
    • 1
  • Gabriele Fuchs
    • 1
  • Jochen Tröger
    • 1
  1. 1.Universität Heidelberg, Pädiatrische RadiologieHeidelbergGermany

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