Investigation of the Relationship Between Shoulder Alpha Angle and Humeral Head Displacement Percentage Measured by Ultrasonography in Neonatal Brachial Plexus Palsy Infants With Clinical Parameters

Condition(s) studied

Investigational drug(s) / intervention(s)

Shoulder Ultrasonography: Ultrasonographic measurement of the shoulder alpha angle and percentage of humeral head displacement (PHHD), to be performed at each clinical visit.

Standardized Clinical Examination: Standardized physical examination including passive range of motion, Active Movement Scale, Toronto Test Score, and subluxation-specific clinical signs, to be performed at each visit.

Study summary

This study will examine infants with a birth-related nerve injury called neonatal brachial plexus palsy, which can affect movement in the arm and sometimes cause the shoulder joint to shift out of its normal position (subluxation). Researchers will use ultrasound imaging to measure the shoulder joint and will compare these measurements with findings from a physical examination, to determine which clinical signs can help predict whether a baby's shoulder will develop this problem. The goal is to help doctors detect shoulder problems earlier, so that treatment can start sooner.

Eligibility

Primary outcome measure(s)

• Ultrasonographic Alpha Angle — Assessed at each clinical visit from 3 months to 1 year of age
  Alpha angle will be measured sonographically at each shoulder examination. Glenohumeral subluxation will be defined as an alpha angle greater than 30 degrees.
• Percentage of Humeral Head Displacement (PHHD) — Assessed at each clinical visit from 3 months to 1 year of age
  PHHD will be measured sonographically at each shoulder examination. Glenohumeral dislocation will be defined as an alpha angle greater than 30 degrees combined with PHHD greater than 50%.

Trial sites (1)

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