Abstract
PurposeThe aim of this study was to first develop and use 1.0 s ultrafast magnetic resonance imaging (MRI) to confirm the location of the femoral head in non-sedated infants with developmental dysplasia of the hip (DDH) after reduction with spica cast application in clinical settings.MethodsThe ultrafast acquisition was achieved by employing a balanced steady-state free precession sequence and immobilizing the patient with dedicated sandbags. On completion of the ultrafast MRI study, all infants were sedated for conventional MRI scanning. Two orthopaedic surgeons retrospectively evaluated the image quality, result of the reduction and total MRI study time (including patient immobilization, coil setup, and scanning) in 14 DDHs of 13 infants (one with bilateral DDHs).ResultsBoth reviewers stated that there were no motion artefacts for non-sedated infants during the ultrafast MRI and that the quality of both the ultrafast and conventional MRI images were acceptable to assess the femoral head location. Assessment of the reduction procedure resulted in two hips being categorized as ‘incomplete reduction’ requiring a re-reduction procedure. The total study time of ultrafast and conventional MRI was 6 ± 1 min and 14 ± 3 min, respectively (P < 0.001). No complications due to sedation, such as hypoxia, were reported. The average sedation waiting time was 1 h 25 min ± 34 min.Conclusion The ultrafast MRI procedure reported here can be readily employed to confirm the location of the femoral head in infants with DDHs, without the use of any sedation.
Highlights
Developmental dysplasia of the hip (DDH) treatment consists of initial concentric reduction followed by stabilization
The ultrafast magnetic resonance imaging (MRI) procedure reported here can be readily employed to confirm the location of the femoral head in infants with developmental dysplasia of the hip (DDH), without the use of any sedation
We have developed and employed a 1.0 s ultrafast MRI protocol to confirm the location of the femoral head in non-sedated infants with DDH after reduction with spica cast application in the clinical setting
Summary
Developmental dysplasia of the hip (DDH) treatment consists of initial concentric reduction followed by stabilization. Several reduction techniques are commonly used, such as the Pavlik harness [1], acute manual closed reduction [2], gradual reduction by traction [3] and open reduction [4]. In all of these procedures, confirmation of concentric reduction and monitoring of the concentricity during the stabilization phase are imperative. Using ultrasonography it is possible to image the cartilaginous femoral head, and this modality is reported to be reliable when compared with radiography [5].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
