YURAC BARRIENTOS, RATKO JOVAN

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AO Spine-DGOU Osteoporotic Fracture Classification System: Internal Validation by the AO Spine Knowledge Forum Trauma
(2024)
Julian Scherer
;
Andrei Joaquim
;
Alex Vaccaro
;
Rishi Kanna
;
Mohammad El-Sharkawi
<jats:sec><jats:title>Study Design</jats:title><jats:p> Cross-sectional survey. </jats:p></jats:sec><jats:sec><jats:title>Objectives</jats:title><jats:p> Injury classifications are important tools to identify fracture patterns, guide treatment-decisions and aid to identify optimal treatment plans. The AO Spine-DGOU Osteoporotic Fracture (OF) classification system was developed, and the aim of this study was to assess the reliability of this new classification system. </jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p> 23 Members of the AO Spine Knowledge Forum Trauma participated in the validation process. Participants were asked to rate 33 cases according to the OF classification at 2 time points, 4 weeks apart (assessment 1 and 2). The kappa statistic (κ) was calculated to assess inter-observer reliability and intra-rater reproducibility. The gold master key for each case was determined by approval of at least 5 out of 7 members of the DGOU. </jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p> A total of 1386 ratings (21 raters) were performed. The overall inter-rater agreement was moderate with a combined kappa statistic for the OF classification of 0.496 in assessment 1 and 0.482 in assessment 2. The combined percentage of correct ratings (compared to gold-standard) in assessment 1 was 71.4% and 67.4% in assessment 2. The average intra-rater reproducibility was substantial (κ = 0.74, median 0.76, range 0.55 to 1.00, SD 0.13) for the assessed fracture types. </jats:p></jats:sec><jats:sec><jats:title>Conclusions</jats:title><jats:p> The assessed overall inter-rater reliability was moderate and substantial in some instances. The average intra-rater reproducibility is substantial. It seems that appropriate training of the classification system can enhance inter- and intra-rater reliability. </jats:p></jats:sec>
Scopus© Citations 4 1
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Accuracy and reliability of the AO Spine subaxial cervical spine classification system grading subaxial cervical facet injury morphology
(2021)
Juan P. Cabrera
;
Ratko Yurac
;
Alfredo Guiroy
;
Andrei F. Joaquim
;
Charles A. Carazzo
13Scopus© Citations 7
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Predicting early complications in patients with spinal gunshot wounds: A multicenter study
(2024)
Guillermo A. Ricciardi
;
Juan P. Cabrera
;
Oscar Martínez
;
Javier Matta
;
Hugo Vilchis
8Scopus© Citations 2
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[Artículo traducido] Lesiones vertebrales por proyectil de arma de fuego: estudio de cohorte retrospectivo, multicéntrico
(2024)
G. Ricciardi
;
J.P. Cabrera
;
Ó. Martínez
;
J. Cabrera
;
J. Matta
Scopus© Citations 2 2
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Management of Unilateral Cervical Facet Joint Dislocation in Neurologically Intact Patients: Results of an Ao Spine latin American Survey
(2021)
Andrei F. Joaquim
;
YURAC BARRIENTOS, RATKO JOVAN
;
Marcelo Valacco
;
Orlando R. Neto
;
Charles A. Carazzo
9Scopus© Citations 7
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Conventional Radiotherapy Timing and Wound Complication Avoidance After Surgery for Metastatic Spine Disease. A LatAm Modified Delphi Study
(Elsevier BV, 2025-03)
Federico Landriel
;
Kevin White
;
Fernando Padilla Lichtenberger
;
Alfredo Guiroy
;
Alisson Teles
2
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SPINE20 recommendations 2025: Sustainable spine care for all
(Elsevier BV, 2026)
Adriaan J. Vlok
;
Koji Tamai
;
Suhail S. Alassiri
;
Thomas R. Blattert
;
Marco A. Campello
1
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Controversies in management of floating lateral mass fractures of subaxial cervical spine: a narrative review
(Elsevier BV, 2026-02)
YURAC BARRIENTOS, RATKO JOVAN
;
Andrei Joaquim
;
Sebastian Bigdon
;
Mohamed M. Aly
;
Ignacio Cirillo
1
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Pathological axis fracture secondary to a solitary bone plasmacytoma: Two cases and a literature review
(2021)
YURAC BARRIENTOS, RATKO JOVAN
;
Alvaro Silva
;
Matias Delgado
;
Marilaura Nuñez
;
Juan Lopez
<jats:sec id="st1"> <jats:title>Background: </jats:title> <jats:p>Solitay bone plasmocytoma (SBP) account for just 5–10% of all plasma cell neoplasms. They are infrequent in the cervical spine, especially involving the C0–C2 segment. In this article we conducted a literature review and present the diagnosis, management and long term course of two patients with SBP of C2 causing cervical instability.</jats:p> </jats:sec> <jats:sec id="st2"> <jats:title>Methods: </jats:title> <jats:p>We assessed the clinical records of two patients with SBP in C2 and cervical instability attributed to SP-B involving C2. Both patients presented with progressive, severe cervicalgia, and the “sensation” of skull instability. Magnetic resonance imaging revealed an extensive, infiltrative lesion involving C2 vertebral body and lateral masses, consistent with a plasmacytoma.</jats:p> </jats:sec> <jats:sec id="st3"> <jats:title>Results: </jats:title> <jats:p>Both patients underwent emergency posterior surgical stabilization with craniocervical fixation; this was accompanied by a C2 transpedicular biopsy. Postoperatively, patients exhibited no focal neurological deficits and rapidly became pain free. They additional recieved 25 sessions of local conventional radiation therapy. Both patients are doing well as respective 2 and 7-year follow-up.</jats:p> </jats:sec> <jats:sec id="st4"> <jats:title>Conclusion: </jats:title> <jats:p>Although rare, unstable SBP may present atypical cervical location that readily responds to surgical descompression/fusion and radiotherapy.</jats:p> </jats:sec>
Scopus© Citations 2 1
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Resection of a sacral chordoma aided by neuronavigation: A case report
(2021)
Alvaro Silva González
;
Guisela Quinteros Rivas
;
Rafael Calvo
;
YURAC BARRIENTOS, RATKO JOVAN
;
Bartolomé Marré Pacheco
1

YURAC BARRIENTOS, RATKO JOVAN

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