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. 2014 Aug;8(4):319-24.
doi: 10.1007/s11832-014-0600-5. Epub 2014 Jul 4.

A novel method for assessing postoperative femoral head reduction in developmental dysplasia of the hip

Anthony Cooper  1 , Owain Evans, Farhan Ali, Mark Flowers
Affiliations

A novel method for assessing postoperative femoral head reduction in developmental dysplasia of the hip

Anthony Cooper et al. J Child Orthop. 2014 Aug.

Abstract

Purpose: Developmental dysplasia of the hip (DDH) affects approximately 1 % of live births. Dislocated hips require reduction and stabilisation in a spica cast, and reduction efficacy is assessed radiologically. Numerous measurements are used to ascertain the adequacy of reduction but can be inconsistent in evaluating femoral head position. This study describes the morphology of the developing acetabulum in DDH and validates a novel method to assess adequate reduction of the dysplastic hip following closed or open reduction.

Methods: A retrospective review was performed of 66 consecutive patients undergoing reduction of hip dislocation over a 2-year period. Three independent reviewers evaluated postoperative CT scans to assess anterior-posterior (AP) displacement and modified Shenton's line. Acetabular morphology was also assessed along with hip congruency using a described novel 'posterior neck line'.

Results: Dislocated hips were successfully identified using the posterior neck line with a sensitivity of 0.71 and specificity of 0.88 giving a negative predictive value of 0.97. The interobserver reliability of this technique was higher in comparison against both (AP) displacement and modified Shenton's line.

Conclusions: We have shown a novel approach in assessing the acetabular morphology of DDH and a novel technique to accurately confirm the reduction of dislocated hips following open or closed reduction.

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Figures

Fig. 1
Fig. 1
Postreduction single slice CT image showing the morphology of dysplasia
Fig. 2
Fig. 2
Postreduction single slice CT image highlighting the acetabular ratio
Fig. 3
Fig. 3
Postoperative single slice CT showing the posterior neck line in a reduced left hip
Fig. 4
Fig. 4
Postoperative single slice CT image with the posterior neck line revealing a dislocated left hip
Fig. 5
Fig. 5
a Postreduction single slice CT image with hips in neutral position compared with the hips in a more abducted position b in the same patient following change of spica cast
See this image and copyright information in PMC

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References

    1. Browning WH, Rosenkrantz H, Tarquino T. Computed tomography in congenital hip dislocation: the role of acetabular anteversion. J Bone Joint Surg Am. 1982;64:27–31. - PubMed
    1. Stanton RP, Capecci R. Computed tomography for early evaluation of developmental dysplasia of the hip. J Pediatr Orthop. 1992;12:727–730. doi: 10.1097/01241398-199211000-00005. - DOI - PubMed
    1. Buckley SL, Sponseller PD, Magid D. The acetabulum in congenital and neuromuscular hip instability. J Pediatr Orthop. 1991;11:498–501. doi: 10.1097/01241398-199107000-00015. - DOI - PubMed
    1. Edelson JG, Hirsch M, Weinberg H, Attar D, Barmeir E. Congenital dislocation of the hip and computerised axial tomography. J Bone Joint Surg Br. 1984;66:472–478. - PubMed
    1. Farber JM. A helpful radiographic sign in CDH. Orthopedics. 1992;15:1072–1074. - PubMed