RICARDO FERREIRA BENTO
Projetos de Pesquisa
Unidades Organizacionais
Departamento de Otorrinolaringologia e Oftalmologia, Faculdade de Medicina - Docente
Instituto Central, Hospital das Clínicas, Faculdade de Medicina
LIM/32 - Laboratório de Otorrinolaringologia, Hospital das Clínicas, Faculdade de Medicina - Líder
Instituto Central, Hospital das Clínicas, Faculdade de Medicina
LIM/32 - Laboratório de Otorrinolaringologia, Hospital das Clínicas, Faculdade de Medicina - Líder
20 resultados
Resultados de Busca
Agora exibindo 1 - 10 de 20
- P3 Cognitive Potential in Cochlear Implant Users(2018) GRASEL, Signe; GRETERS, Mario; GOFFI-GOMEZ, Maria Valeria Schimidt; BITTAR, Roseli; WEBER, Raimar; OITICICA, Jeanne; BENTO, Ricardo FerreiraIntroduction The P3 cognitive evoked potential is recorded when a subject correctly identifies, evaluates and processes two different auditory stimuli. Objective to evaluate the latency and amplitude of the P3 evoked potential in 26 cochlear implant users with post-lingual deafness with good or poor speech recognition scores as compared with normal hearing subjects matched for age and educational level. Methods In this prospective cohort study, auditory cortical responses were recorded from 26 post-lingual deaf adult cochlear implant users (19 with good and 7 with poor speech recognition scores) and 26 control subjects. Results There was a significant difference in the P3 latency between cochlear implant users with poor speech recognition scores (G-) and their control group (CG) (p = 0.04), and between G-and cochlear implant users with good speech discrimination (G+) (p = 0.01). We found no significant difference in the P3 latency between the CG and G+. In this study, all G-patients had deafness due to meningitis, which suggests that higher auditory function was impaired too. Conclusion Post-lingual deaf adult cochlear implant users in the G-group had prolonged P3 latencies as compared with the CG and the cochlear implant users in the G+ group. The amplitudes were similar between patients and controls. All G-subjects were deaf due to meningitis. These findings suggest that meningitis may have deleterious effects not only on the peripheral auditory system but on the central auditory processing as well.
- Overcoming developing-world challenges in cochlear implantation: a South American perspective(2018) BENTO, Ricardo F.; BAHMAD, Fayez; HIPPOLYTO, Miguel A.; COSTA, Sady S. DaPurpose of review Effective hearing rehabilitation with cochlear implantation is challenging in developing countries, and this review focuses on strategies for childhood profound sensorineural hearing loss care in South America. Recent findings Most global hearing loss exists in developing countries; optimal cost-effective management strategies are essential in these environments. This review aims to assess and discuss the challenges of cochlear implantation effectiveness in South America. The authors searched electronic databases, bibliographies, and references for published and unpublished studies. Sensitivity analysis was performed to evaluate the effect of device cost, professional salaries, annual number of implants, and failure rate. Costs were obtained from experts in South America using known costs and estimations whenever necessary. Recent studies reported several challenges in unilateral or bilateral cochlear implants: cochlear implant costs, deaf education costs, increasing need for cochlear implant capacity, and training and increasing longevity. Summary Cochlear implantation was very cost-effective in all South American countries. Despite inconsistencies in the quality of available evidence, the robustness of systematic review methods substantiates the positive findings of the included studies, demonstrating that unilateral cochlear implantation is clinically effective and likely to be cost-effective in developing countries.
- Polyethylene Glycol fusion associated with anti-oxidants: A new promise in the treatment of traumatic paralysis (vol 40, pg 1489, 2018)(2018) SALOMONE, Raquel; JACOMO, Alfredo Luiz; BENTO, Ricardo F.; NASCIMENTO, Silvia Bona do; LEZIROVITZ, Karina; HOJAIJ, Flavio Carneiro; COSTA, Heloisa J. Z. R.
- The influence of the subarcuate artery in the superior semicircular canal dehiscence and its frequency on stillbirths: illustrative cases and systematic review(2018) BRAGA, Gabriela Pereira Bom; NOBLE, Jack H.; GEBRIM, Eloisa Maria Mello Santiago; LABADIE, Robert F.; BENTO, Ricardo FerreiraLiterature describes that on the 25th gestational week the labyrinth is fully formed and with adult size. However, recent studies have shown that the cranial and labyrinth development continues until 3 years of age. Objectives: To demonstrate through tomographic study the frequency of semicircular canal dehiscence on nine specimens of stillbirths between 32 and 40 weeks and, through literature review, present another possible etiology for its cause. Methods: Tomographic study of the temporal bone of 9 specimens of stillbirths between 32 and 40 weeks. Results: A frequency of 88.89% of alterations were found in our study, with 44% presenting bilateral alterations and 44% unilateral alteration; 11.11% had no dehiscence. Conclusion: The tomographic study showed superior semicircular canal dehiscence (SSCD) in 88% of the specimens studied, protrusion of the superior semicircular canal (SSC) in all fetuses, and an enlarged SSC that may be caused by the expansion process provoked by the subarcuate artery entering the subarcuate canaliculus, leading to SSCD.
- Validation of a Portuguese version of the health-related quality of life measure for active chronic otitis media (COMQ-12)(2018) FONSECA, Anna Carolina Oliveira; RAMOS, Pedro; BALSALOBRE, Fernando A.; FREITAS, Edson L.; PHILLIPS, John S.; YUNG, Matthew W.; BENTO, Ricardo F.Introduction: Measuring the impact on quality of life, especially after the beginning of the treatment, is becoming increasingly important in healthcare. Objective: The aim of this study was to translate the Chronic Otitis Media Questionnaire-12 (COMQ-12) into Portuguese language and validate this version in a group of patients with chronic otitis media. Methods: The Portuguese version of COMQ-12 was obtained by translation and back translation. Portuguese speaking patients with a history of active chronic otitis media were asked to complete the COMQ-12 Portuguese version. Cronbach's alpha coefficient was calculated for an estimation of the internal consistency of the questionnaire. Results: A total of 100 patients were included in the study; 49 women and 51 men, with a mean age of 39 years (range 12-77 years, median 40 years). The average COMQ-12 score was 29, out of a maximum score of 60. Cronbach's alpha result for the Portuguese version of the COMQ-12 was 0.85, indicating a high internal consistency. The participants presented with different forms of chronic otitis media, and almost all domains of the COMQ-12 questionnaire were able to differentiate between patients with healed chronic otitis media and patients with cholesteatoma or wet tympanic membrane perforation. Showing that patients with healed chronic otitis media have a better quality of life, measured by the COMQ-12, is a first step to guarantee the questionnaire's validity. The next step will consist on routinely using the questionnaire in patients undergoing surgery for chronic otitis media in order to evaluate their quality of life after treatment. Conclusion: The COMQ-12 Portuguese version showed high reliability, and may be used as an assessment of quality of life in patients with chronic otitis media. (C) 2017 Associacao Brasileira de Otorrinolaringologia e Cirurgia Cervico-Facial.
bookPart Otosclerose(2018) BENTO, Ricardo Ferreira; LOPES, Paula Tardim- Benefit of Cochlear Implantation in Children with Multiple-handicaps: Parent's Perspective(2018) NASRALLA, Heloisa Romeiro; MONTEFUSCO, Adilson Marcos; HOSHINO, Ana Cristina H.; SAMUEL, Paola Angelica; MAGALHAES, Ana Tereza de Matos; GOFFI-GOMEZ, Maria Valeria Schmidt; TSUJI, Robinson Koji; BENTO, Ricardo FerreiraIntroduction The cochlear implants centers in the world are studying the cochlear implantation in children with multiple handicaps. Objective To develop a questionnaire to analyze the subjective benefits of the cochlear implantation in multiple handicapped children according to their parent's perspective. Methods A questionnaire was applied to 14 families of multiple handicapped children, aging from 2-12 years old and having from 11 months to 11 years of implant use. Results The social-emotional abilities were improved because of many factors, such as: auditory exposure, which happened in 84% of the children; recognition of their own names, which increased in 56%; and development of eye contact, in 28% of the subjects. Other benefits appeared to be: music appreciation and more attention and adherence to other therapies and school activities. Besides, some children became interested in objects, playing with other children, and more adapted to daily routines. Thirty-five percent of the children acquired oral language, mainly the bilaterally implanted, while 14% of them were engaged in sign language. Although all of the children showed a significant improvement in communication, the emotional issues of some families and the severity of the handicaps negatively impacted the outcomes. In spite of the families' acknowledgement of some benefits, the diagnosis of autism spectrum disorder caused frustration, requiring a readjustment of the expectations. Conclusion The questionnaire turned out to be an adequate tool to reveal the social-emotional benefits of cochlear implantation. Although oral language was not the major outcome in these cases, the cochlear implant benefits involved the whole family. All of the families recommended the implant to other children in a similar situation.
- Evaluation of the Facial Recess and Cochlea on the Temporal Bone of Stillbirths regarding the Percutaneous Cochlear Implant(2018) BRAGA, Gabriela Pereira Bom; GEBRIM, Eloisa; BALACHANDRAN, Ramya; NOBLE, Jack; LABADIE, Robert; BENTO, Ricardo FerreiraIntroduction The literature shows that there are anatomical changes on the temporal bone anatomy during the first four years of life in children. Therefore, we decided to evaluate the temporal bone anatomy regarding the cochlear implant surgery in stillbirths between 32 and 40 weeks of gestational age using computed tomography to simulate the trajectory of the drill to the scala timpani avoiding vital structures. Objectives To measure the distances of the simulated trajectory to the facial recess, cochlea, ossicular chain and tympanic membrane, while performing the minimally invasive cochlear implant technique, using the Improvise imaging software (Vanderbilt University, Nashville, TN, US). Methods An experimental study with 9 stillbirth specimens, with gestational ages ranging between 32 and 40 weeks, undergoing tomographic evaluation with individualization and reconstruction of the labyrinth, facial nerve, ossicular chain, tympanic membrane and cochlea followed by drill path definition to the scala tympani. Improvise was used for the computed tomography (CT) evaluation and for the reconstruction of the structures and trajectory of the drill. Results Range of the distance of the trajectory to the facial nerve: 0.58 to 1.71mm. to the ossicular chain: 0.38 to 1.49 mm; to the tympanic membrane: 0.85 to 1.96 mm; total range of the distance of the trajectory: 5.92 to 12.65 mm. Conclusion The measurements of the relationship between the drill and the anatomical structures of the middle ear and the simulation of the trajectory showed that the middle ear cavity at 32 weeks was big enough for surgical procedures such as cochlear implants. Although cochlear implantation at birth is not an indication yet, this study shows that the technique may be an option in the future.
- Evaluating Intracochlear Trauma after Cochlear Implant Electrode Insertion through Middle Fossa Approach in Temporal Bones(2018) LESSER, Juan Carlos Cisneros; BRITO, Rubens de; MARTINS, Graziela de Souza Queiroz; GEBRIM, Eloisa Maria Mello Santiago; BENTO, Ricardo FerreiraObjective. To evaluate cochlear trauma after cochlear implant insertion through a middle fossa approach by means of histologic and imaging studies in temporal bones. Study Design. Prospective cadaveric study. Setting. University-based temporal bone laboratory. Subjects and Methods. Twenty fresh-frozen temporal bones were implanted through a middle cranial fossa basal turn cochleostomy. Ten received a straight electrode and 10 a perimodiolar electrode. Samples were fixed in epoxy resin. Computed tomography (CT) scans determined direction, depth of insertion, and the cochleostomy to round window distance. The samples were polished by a microgrinding technique and microscopically visualized to evaluate intracochlear trauma. Descriptive and analytic statistics were performed to compare both groups. Results. The CT scan showed intracochlear insertions in every bone, 10 directed to the middle/apical turn and 10 to the basal turn. In the straight electrode group, the average number of inserted electrodes was 12.3 vs 15.1 for the perimodiolar group (U = 78, P = .0001). The median insertion depth was larger for the perimodiolar group (14.4 mm vs 12.5 mm, U = 66, P = .021). Only 1 nontraumatic insertion was achieved and 14 samples (70%) had important trauma (Eshraghi grades 3 and 4). No differences were identified comparing position or trauma grades for the 2 electrode models or when comparing trauma depending on the direction of insertion. Conclusion. The surgical technique allows a proper intracochlear insertion, but it does not guarantee a correct scala tympani position and carries the risk of important trauma to cochlear microstructures.
bookPart Barotrauma(2018) BENTO, Ricardo Ferreira; LOPES, Paula Tardim