Abstract
Objective To evaluate the interobserver agreement in the measurement of anatomical parameters
of the shoulder using manual methods of two-dimensional (2D) computed tomography (CT)
unformatted in the plane of the scapula and to compare them with the automated measurement
obtained through the Blueprint (Wright Medical, Memphis, TN, United States) software,
which uses reconstructed three-dimensional (3D) images.
Methods The present is a cross-sectional study in which 2D CT images of 38 patients with
different diagnoses were used. The anatomical parameters were measured by the manual
methods described by Friedman et al., the glenoid vault method, the Maurer et al.
method, and shoulder subluxation according to Walch et al., by five independent qualified
surgeons and compared with the parameters obtained through the Blueprint automated
software.
Results Significant differences were found between the manual measurement version obtained
through the Friedman et al. method and the automated version. The mean values found
for inclination did not show statistically significant differences among the methods.
The mean value found for subluxation showed significant differences between the average
observed in the analyses performed by the automated method and those performed by
the surgeons.
Conclusion The manual measurements of glenoid version and inclination performed by experienced
surgeons are effective, and the vault method is superior to the Friedman et al. method
in the analysis of severe glenoid deformities.
