Three-dimensional humeral morphologic alterations and atrophy associated with obstetrical brachial plexus palsy
Autor: | Katharine E. Alter, Sylvain Brochard, Abrahm J. Behnam, Frances T. Sheehan |
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Rok vydání: | 2013 |
Předmět: |
Male
Adolescent Intraclass correlation medicine.medical_treatment Article Atrophy Imaging Three-Dimensional Birth Injuries medicine Humans Orthopedics and Sports Medicine Humerus Range of Motion Articular Brachial Plexus Neuropathies Child Reduction (orthopedic surgery) Palsy medicine.diagnostic_test business.industry Reproducibility of Results Magnetic resonance imaging General Medicine Anatomy medicine.disease Magnetic Resonance Imaging Birth injury Joint Deformities Acquired medicine.anatomical_structure Humeral Head Surgery Female Bone Diseases business Brachial plexus |
Zdroj: | Journal of shoulder and elbow surgery. 23(5) |
ISSN: | 1532-6500 |
Popis: | Background Obstetrical brachial plexus palsy (OBPP) is a common birth injury, resulting in severe functional losses. Yet, little is known about how OBPP affects the 3-dimensional (3D) humeral morphology. Thus, the purpose of this study was to measure the 3D humeral architecture in children with unilateral OBPP. Methods Thirteen individuals (4 female and 9 male patients; mean age, 11.8 ± 3.3 years; mean Mallet score, 15.1 ± 3.0) participated in this institutional review board approved study. A 3D T1-weighted gradient-recalled echo magnetic resonance image set was acquired for both upper limbs (involved and noninvolved). Humeral size, version, and inclination were quantified from 3D humeral models derived from these images. Results The involved humeral head was significantly less retroverted and in declination (medial humeral head pointed anteriorly and inferiorly) relative to the noninvolved side. Osseous atrophy was present in all 3 dimensions and affected the entire humerus. The inter-rater reliability was excellent (intraclass correlation coefficient, 0.96-1.00). Discussion This study showed that both humeral atrophy and bone shape deformities associated with OBPP are not limited to the axial plane but are 3D phenomena. Incorporating information related to these multi-planar, 3D humeral deformities into surgical planning could potentially improve functional outcomes after surgery. The documented reduction in retroversion is an osseous adaptation, which may help maintain glenohumeral congruency by partially compensating for the internal rotation of the arm. The humeral head declination is a novel finding and may be an important factor to consider when one is developing OBPP management strategies because it has been shown to lead to significant supraspinatus inefficiencies and increased required elevation forces. |
Databáze: | OpenAIRE |
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