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Reliability of the Soong Classification for Volar Plate Position
Kevin F Lutsky1, Megan Jimenez1, Michael Rivlin1
1The Rothman Institute, Hand & Upper Extremity Surgery, Philadelphia, PA.
The Journal of Hand Surgery
|May 24, 2016
Summary
The Soong classification system reliably assesses volar plate prominence in distal radius fractures. This study confirms its high inter- and intraobserver reliability for orthopedic surgeons.
Area of Science:
- Orthopedic Surgery
- Radiographic Assessment
- Surgical Outcomes
Background:
- Volar plates are commonly used to fix distal radius fractures.
- Assessing the prominence of these plates is important for surgical outcomes.
- Standardized classification systems aid in consistent evaluation.
Purpose of the Study:
- To evaluate the reliability of the Soong classification system for assessing volar plate prominence.
- To determine both interobserver and intraobserver agreement on Soong grades.
Main Methods:
- Four physicians reviewed lateral wrist radiographs of 46 distal radius fractures with volar plates.
- Radiographs were classified using the Soong system on three separate occasions.
- Observers were blinded to previous classifications and clinical data.
Main Results:
- The Soong classification demonstrated high intraobserver reliability (0.80-0.94) and good interobserver reliability (0.78).
- The distribution of grades was: 17 Soong grade 0, 20 Soong grade 1, and 9 Soong grade 2.
- Confidence intervals for reliability measures were provided.
Conclusions:
- The Soong classification is a reliable tool for evaluating volar plate prominence.
- The system facilitates consistent and reproducible assessment in clinical practice.
- Continued use of the Soong classification is recommended.
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