Moreno LÁ, Vergara-Amador E, Cárdenas VR

Language: Spanish
References: 20
Page: 53-64
PDF size: 398.57 Kb.

ABSTRACT

Introduction: Shoulder adduction is frequently in obstetric brachial plexus paralysis, as well as internal rotation and external rotation loss with muscle imbalance between internal and external rotators. This leads to alteration of the glenohumeral joint. The aim of this report is to show the usefulness of ultrasonography in the diagnosis and monitoring of alterations in this joint.
Method: A number of cases was studied for children with obstetric brachial plexus paralysis, all with internal rotation attitude and adduction of the shoulder. Shoulder ultrasound is performed to determine changes in the glenohumeral joint. The position of the humeral head ossification with respect to the shoulder line is determined; the alpha angle was measured and the degree of subluxation of the humeral head was checked.
Results: Ten patients were evaluated with an average age of 15 months. Posterior subluxation was seen in five cases with posterior core relative to the shoulder line and alpha angle greater than 30°. In four cases with normal angle, asymmetry of at least 10 degrees from the contralateral shoulder was seen.
Conclusions: Shoulder ultrasound is the imaging modality of choice for initial assessment and monitoring of shoulder in obstetric brachial plexus paralysis. It is an economic resource that can diagnose the presence and degree of posterior subluxation and does not require sedation or use of ionizing radiation.

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