Renato Valério Rodrigues Cal

Centro Universitário do Pará

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Pedro Luiz Mangabeira Albernaz

Hospital Israelita Albert Einstein

Francisco Zuma e Maia

Pontifícia Universidade Católica do Rio Grande do Sul

Sérgio Carmona

Federico Santa María Technical University

Guillermo Zalazar

Centro Científico Tecnológico - San Luis

Bernardo Faria Ramos

Universidade Federal do Espírito Santo

Fayez Bahmad

Instituto Brasiliense de Otorrinolaringologia

Francisco Carlos Zuma e Maia

Pontifícia Universidade Católica do Rio Grande do Sul

Joel Lavinsky

Universidade Federal do Rio Grande do Sul

Roseli Saraiva Moreira Bittar

Universidade de São Paulo

Rogério Hamerschmidt

Hospital de Clínicas Universidade Federal do Paraná

Cooperative Institutions

Universidade de São Paulo

Universidade Estadual de Campinas (UNICAMP)

Universidade Federal de São Paulo

Centro Universitário do Pará

Universidade Federal do Rio Grande do Sul

Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo

Union des Industries Ferroviaires Européennes

Fundação de Apoio à Universidade Federal de São Paulo

Public Health Dayton & Montgomery County

University of Minnesota

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Klinische Bewertung des vestibulären Systems: vestibuläre Labortests

Springer eBooks (2024)

Pedro Luiz Mangabeira Albernaz Francisco Zuma e Maia Sérgio Carmona Renato Valério Rodrigues Cal Guillermo Zalazar

10.1007/978-3-031-51382-4_5

Cite

Citations (0)

Die Rolle der Audiologie in der Neurootologie

Springer eBooks (2024)

Pedro Luiz Mangabeira Albernaz Francisco Zuma e Maia Sérgio Carmona Renato Valério Rodrigues Cal Guillermo Zalazar

10.1007/978-3-031-51382-4_7

Cite

Citations (0)

Practical approach for lateral canal benign paroxysmal positional vertigo

Journal of the Neurological Sciences (2022)

Bernardo Faria Ramos Renato Valério Rodrigues Cal Pedro Luiz Mangabeira Albernaz Francisco Zuma e Maia

Posterior Semicircular Canal

10.1016/j.jns.2022.120180

Cite

Citations (2)

Zuma Modified Maneuver as a Treatment to Geotropic Lateral Semicircular Canal Benign Paroxysmal Positional Vertigo

International Archives of Otorhinolaryngology (2020)

Bernardo Faria Ramos Renato Valério Rodrigues Cal Camila Martins Brock Pedro Luiz Mangabeira Albernaz Francisco Zuma e Maia

Abstract Introduction Benign Paroxysmal Positional Vertigo (BPPV) is the most common vestibular disorder, resulting from detached otoliths that migrate to one of the semicircular canals – canalolithiasis – or one of the cupulas – cupulolithiasis. The present study is related to lateral canal BPPVs, which may be either geotropic or apogeotropic. The geotropic variant of lateral semicircular canal benign paroxysmal positional vertigo (LC-BPPV) is attributed to free floating particles in the posterior arm of the lateral semicircular canal. Objectives To verify the possibility of employing the Zuma repositioning maneuver, with a brief modification, as an alternative treatment for geotropic LC-BPPV. Methods Seven patients with geotropic LC-BPPV were enrolled and treated with the Zuma modified maneuver. Patients were reevaluated 1 hour after a single maneuver, to confirm the resolution of vertigo and positional nystagmus. Results All seven patients achieved immediate resolution of vertigo and positional nystagmus as measured 1 hour after the application of the maneuver. Conclusion The Zuma modified maneuver was effective for geotropic LC-BPPV after a single application. The use of the Zuma maneuver for both apogeotropic and geotropic LC-BPPV may simplify the treatment of these patients.

Posterior Semicircular Canal

Vestibular disorders

10.1055/s-0040-1712935

Cite

Citations (8)

Vertical “pseudospontaneous” nystagmus in a patient with posterior canal BPPV: case report

Acta Oto-Laryngologica Case Reports (2021)

Bernardo Faria Ramos Renato Valério Rodrigues Cal Pedro Luiz Mangabeira Albernaz Francisco Zuma e Maia

A 34-year old men presented with 2-days history of quick episodes of vertigo caused by changes in the position of the head, mainly when turning over in the supine position. Video-Frenzel examination revealed a mild spontaneous downbeating nystagmus only with visual fixation removed that robustly increased in the bow test. The lean test and the Dix Hallpike test to the right side revealed an upbeating torsional nystagmus with the upper pole of the eye beating to the right ear. Then, the Epley maneuver was performed, given the clinical suspicion of right posterior canal BPPV, and he achieved immediate resolution of vertigo and nystagmus. Presumably, this is the first report in which a patient with posterior canal BPPV demonstrated a vertical ‘pseudospontaneous’ nystagmus.

Supine position

Posterior Semicircular Canal

10.1080/23772484.2021.2008800

Cite

Citations (2)

Pruebas de VVOR y VORS como herramientas de diagnóstico para la hipofunción vestibular unilateral y bilateral

Revista ORL (2018)

Bernardo FARIA-RAMOS Renato Valério Rodrigues Cal Sérgio Carmona Konrad P. Weber Francisco ZUMA-MAIA

Background: In clinical practice, tests such as the head impulse test paradigm (HIMP) and suppression head impulse paradigm (SHIMP) stimulate high-frequency head movements so the visual and somatosensory system are somehow suppressed. In low frequencies, two tests could be useful tools for vestibular assessment: VVOR (visually enhanced vestibulo-ocular reflex) and VORS (vestibulo-ocular reflex suppression). The aim of this study is to explain the eye movements typically found during VVOR and VORS testing in patients with unilateral and bilateral vestibular hypofunction. Methods: Ten patients with unilateral vestibular hypofunction, two patients with bilateral vestibular hypofunction, and ten patients without vestibular symptoms (control group) were analyzed retrospectively through VVOR and VORS testing in an Otometrics ICS Impulse system. Results: In the VVOR test, patients with unilateral vestibular hypofunction exhibited catch-up saccades beating to the healthy side when moving the head to the affected side, while patients with bilateral vestibular hypofunction exhibited catch-up saccades beating to the opposite side of head movement. In the VORS test, patients with unilateral vestibular hypofunction exhibited catch-up saccades to the healthy side when moving the head to this side, while patients with bilateral vestibular hypofunction did not exhibit catch-up saccades during head movement to either side. Conclusion: Our data suggest that the VVOR and VORS tests yield the same findings as the HIMP and SHIMP tests in unilateral and bilateral vestibular hypofunction, and can contribute to confirming peripheral etiology as well as the affected side.

Vestibulo–ocular reflex

10.14201/orl.19337

Cite

Citations (0)

APOGEOTROPIC VARIANT OF HC-BPPV : WHERE ARE THE PARTICLES?

DOAJ (DOAJ: Directory of Open Access Journals) (2019)

Faria Bernardo Ramos Renato Valério Rodrigues Cal Pedro Luiz Mangabeira Albernaz Francisco Zuma e Maia

Introduction: The apogeotropic variant of horizontal semicircular canal benign paroxysmal positional vertigo (HC-BPPV) is attributed to free floating particles in the anterior arm of the lateral semicircular canal, particles attached to the cupula facing the canal or particles attached to the cupula facing the utricule. Zuma e Maia described a new treatment to both canalithiasis of the anterior arm of the HC or cupulolithiasis of the HC. Objective: We evaluated our patients with Apogeotropic horizontal semicircular canal BPPV using the Zuma's Maneuver and the dynamics of nystagmus during the repositioning of the particles. Methods: Seventeen patients with Apogeotropic HC-BPPV were enrolled and treated with Zuma's Maneuver. During the repositioning of the particles to the utricule, we observed the nystagmus evoked in each position of the maneuver in order to know where the otoliths were probably located. Results: Eight patients, that we assumed to be a canalithiasis of the anterior arm, showed an apogeotropic nystagmus in the first position for less than 1 minute that maintened the same direction in every position of the maneuver. Six patients, that we assumed to be a cupulolithiasis with the particles facing the canal, showed an apogeotropic nystagmus in the first position for more than 1 minute that maintened the same direction in every position of the maneuver. Three patients, that we assumed to be a cupulolithiasis with the particles facing the utricle, showed an apogeotropic nystagmus in the first position for more than 1 minute that changed direction in the second position of the maneuver. Conclusion: Our data suggest that we can assume where the otoliths probably are located observing the pattern of the nystagmus evoked in each position of the Zuma´s maneuver in patients with Apogeotropic HC-BPPV.

10.14201/orl.20992

Cite

Citations (0)

Giant cholesteatoma: case and literature review' report

DOAJ (DOAJ: Directory of Open Access Journals) (2010)

Leonardo Mendes Acatauassú Nunes Adriano Liberman Magalhães de Barros Renato Valério Rodrigues Cal Claudio Tobias Acatauassú Nunes Fabrício Diniz de Lima

Source

Cite

Citations (1)

Neurotology: definitions and evidence‐based therapies – Results of the I Brazilian Forum of Neurotology

Márcio Cavalcante Salmito Francisco Carlos Zuma e Maia Mário Edvin Greters Alessandra Ramos Venosa Fernando Freitas Ganança

Neurotology