Publications by authors named "Marcel R Dvorak"
Study Design: Global cross-sectional survey.
Objective: To validate the hierarchical nature of the AO Spine Upper Cervical Spine Injury Classification (UCIC) across AO geographical regions/practice experience.
Summary Of Background Data: In order to create a universally validated scheme with prognostic value, AO Spine established an upper cervical spine injury classification involving three elements: injury morphology (region: I - occipital condyle and craniocervical junction; II - C1 ring and C1-2 joint; III - C2 and C2-3 joint), and (subtype: A - isolated bony injury; B - bony/ligamentous injury; C - displaced/translational injury), neurologic status (N0 - intact; N1 - transient deficit; N2 - radiculopathy; N3 - incomplete spinal cord injury (SCI); N4 - complete SCI, and NX - unable to examine), and case-specific modifiers (M1 - injuries at risk of nonunion; M2 - injuries at risk of instability; M3 - patient specific factors; M4 - vascular injury).
Purpose: To validate the AO Spine Subaxial Injury Classification System with participants of various experience levels, subspecialties, and geographic regions.
Methods: A live webinar was organized in 2020 for validation of the AO Spine Subaxial Injury Classification System. The validation consisted of 41 unique subaxial cervical spine injuries with associated computed tomography scans and key images.
Background Context: Prior upper cervical spine injury classification systems have focused on injuries to the craniocervical junction (CCJ), atlas, and dens independently. However, no previous system has classified upper cervical spine injuries using a comprehensive system incorporating all injuries from the occiput to the C2-3 joint.
Purpose: To (1) determine the accuracy of experts at correctly classifying upper cervical spine injuries based on the recently proposed AO Spine Upper Cervical Injury Classification System (2) to determine their interobserver reliability and (3) identify the intraobserver reproducibility of the experts.
Study Design: Global cross-sectional survey.
Objective: To develop and refine the techniques for web-based international validation of fracture classification systems.
Methods: A live webinar was organized in 2018 for validation of the AO Spine Subaxial Injury Classification System, consisting of 35 unique computed tomography (CT) scans and key images with subaxial spine injuries.
Study Design: Global cross-sectional survey.
Objective: To explore the influence of geographic region on the AO Spine Sacral Classification System.
Methods: A total of 158 AO Spine and AO Trauma members from 6 AO world regions (Africa, Asia, Europe, Latin and South America, Middle East, and North America) participated in a live webinar to assess the reliability, reproducibility, and accuracy of classifying sacral fractures using the AO Spine Sacral Classification System.