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An objective measurement technique for posterior scapular displacement
D M Plafcan1, P J Turczany, B A Guenin
1SportMed, Columbus Regional Hospital, IN, USA.
Summary
This study developed a reliable measurement technique to quantify posterior scapular displacement, crucial for assessing shoulder conditions like winging and tipping. The new method offers objective data for clinical evaluation and rehabilitation.
Area of Science:
- Orthopedics
- Biomechanics
- Physical Therapy
Background:
- Scapular control is vital in shoulder rehabilitation.
- Scapular winging and tipping are key clinical indicators.
- Objective measurement of scapular displacement is lacking.
Purpose of the Study:
- Develop a reliable technique to quantify posterior scapular displacement.
- Address the need for objective measurement in shoulder pathology evaluation.
Main Methods:
- Designed a measurement instrument to quantify posterior scapular displacement in degrees.
- Tested 40 healthy subjects in unweighted and weighted (10% body weight) positions.
- Assessed intratester and intertester reliability using Intraclass Correlation Coefficients (ICC) and Standard Error of Measurement (SEM).
Main Results:
- High intratester reliability (ICC: 0.97-0.98, SEM: 0.6-1.1 degrees).
- High intertester reliability (ICC: 0.92-0.97, SEM: 1.1-1.7 degrees).
- Reliability measures were statistically significant (p < 0.05).
Conclusions:
- The developed measurement technique reliably quantifies posterior scapular displacement.
- This method provides objective data for clinical assessment of scapular winging and tipping.
- Further research using this technique is recommended for shoulder rehabilitation.