Utility of MRI in detecting obstacles to reduction in developmental dysplasia of the hip: comparison with two-directional arthrography and correlation with intraoperative findings

Aoki, Kiyoshi; Mitani, Shigeru; Asaumi, Koji; Akazawa, Hirofumi; Inoue, Hajime

doi:10.1007/s007760050101

Cited by 17 publications

(8 citation statements)

References 13 publications

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“…Others have pointed out many of these in the past. 8,9 MRI has also shown that dysplasia in the cartilaginous anlage tends to improve over the first year after reduction. 7 It is the best method for studying the soft-tissue structures of the developing hip.…”

Section: Discussionmentioning

confidence: 99%

The value of MRI undertaken immediately after reduction of the hip as a predictor of long-term acetabular dysplasia

Mitchell

Chew

Goutos

et al. 2007

The Journal of Bone and Joint Surgery. British volume

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Our aim was to determine whether abnormalities noted on MRI immediately after reduction for developmental dysplasia of the hip could predict the persistance of dysplasia and aid surgical planning. Scans of 13 hips in which acetabular dysplasia had resolved by the age of four years were compared with those of five which had required pelvic osteotomy for persisting dysplasia. The scans were analysed by two consultant musculoskeletal radiologists who were blinded to the outcome in each child. The postreduction scans highlighted a number of anatomical abnormalities secondary to developmental dysplasia of the hip, but statistical analysis showed that none were predictive of persisting acetabular dysplasia in the older child, suggesting that the factors which determine the long-term outcome were not visible on these images.

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Section: Discussionmentioning

confidence: 99%

The value of MRI undertaken immediately after reduction of the hip as a predictor of long-term acetabular dysplasia

Mitchell

Chew

Goutos

et al. 2007

The Journal of Bone and Joint Surgery. British volume

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“…When detected in infancy, developmental dysplasia of the hip (DDH) generally responds well to treatment (1, 2) by a soft Pavlik harness, assessed by clinical examination and ultrasound. Dysplasia that persists or is diagnosed late is treated by surgical reduction and spica cast placement.…”

Section: Introductionmentioning

confidence: 99%

“…Indices exist to assess dysplastic hips on CT (3, 6-7-8) but few reports quantify MRI features in DDH (4, 5). Several studies compare initial indices to radiographic outcomes (1, 2, 8, 9, 11, 12), but few correlate to clinical outcomes (8,13) or assess inter-observer variability (12). We comprehensively adapted to MRI all available DDH indices from CT and other modalities, tested which could be feasibly measured on MRI, assessed inter-observer variability, and correlated indices to each other.…”

Section: Introductionmentioning

confidence: 99%

Reliability of Indices Measured on Infant Hip MRI at Time of Spica Cast Application for Dysplasia

2014

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“…A variety of sequences are described in the literature for imaging dysplastic hips, which were also in use during daily routine [5][6][7][8][9][10].…”

Section: Cross Sectional Imaging (Computed Tomography (Ct) or Magneticmentioning

confidence: 99%

“…T1w FS images are used for MR-arthrography. Aoki et al detected on T1w images in children older than one year of age important information and obstacles such as hypertrophied pulvinar or inverted limbus [6].…”

Section: In 1997 Mcnally Et Al [4]mentioning

confidence: 99%

MRI in Hip Dysplasia: How to Shorten your MR-Protocol?

Stranzinger¹,

Adrian²,

Tomas³

et al. 2015

Orthop Muscular Syst

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ObjectiveCongenital hip dysplasia is a common orthopedic disorder in childhood. MRI is widely used to image high grade dysplastic hips after reduction and fixation within a cast. The purpose of this study was to optimize and shorten the MR study to the requests of the pediatric orthopedic surgeons. Material and Methods13 consecutive MR studies of the hip were included in the study (1-5 months of age) between 2003 and 2011. Two pediatric orthopedic surgeons, who were blind for the diagnosis and therapy of the study patients, evaluated all magnetic resonance images (MRI) to determine the type of hip dysplasia. The usefulness of the MR-images was assessed using a 5-point scale. The type of hip dysplasia was assessed using the Tönnis criteria. In addition two radiologists in consensus evaluated the status of sedation and motion artifacts. Original MRI-reports were reviewed. ResultsThe most valuable sequences for the position of the femoral head and the evaluation of the anatomic details of the 13 MR-studies were: (a) In coronal planes: TIRM 3 mm (Score 4.6), T2 TSE 3mm (Score 4.1). (b) In axial planes: PD axial 3mm (Score 4.75), DESS reformats 1.5 mm (Score 4.5). (c) All sagittal sequences and non-fat saturated T1w images were not supportive for the orthopedic surgeons. Mild and major motion artifacts are observed in 33% of the patients with sedation and in 71% without sedation. ConclusionAfter reduction of high-grade hip dysplasia and Spica-cast fixation, MRI examination offers valuable information for the orthopedic surgeon. The MRI study may fulfill the orthopedic surgeon's needs using only one coronal and axial plane (e.g. T2w, PD or DESS) to image the dysplastic hip after treatment in a Spica-cast reliably. The shortening of the protocol may reduce the requirement of general anesthesia or sedation, however optimal images without motion artifacts play an important role in image interpretation.

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Utility of MRI in detecting obstacles to reduction in developmental dysplasia of the hip: comparison with two-directional arthrography and correlation with intraoperative findings

Cited by 17 publications

References 13 publications

The value of MRI undertaken immediately after reduction of the hip as a predictor of long-term acetabular dysplasia

The value of MRI undertaken immediately after reduction of the hip as a predictor of long-term acetabular dysplasia

Reliability of Indices Measured on Infant Hip MRI at Time of Spica Cast Application for Dysplasia

MRI in Hip Dysplasia: How to Shorten your MR-Protocol?

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