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Search Results: 1 - 10 of 18695 matches for " Miguel Angelo Hyppolito "
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Reflections on Bilateral Cochlear Implants  [PDF]
Marcia Yuri Tsumura Kimura, Miguel Angelo Hyppolito
International Journal of Clinical Medicine (IJCM) , 2013, DOI: 10.4236/ijcm.2013.43030
Abstract: The bilateral cochlear implant has increased in recent years in due to the search for auditory enhancements. There are many advantages to the users of the bilateral cochlear implant, which may include the location of the auditory sign, decreasing the head shadow effect for the contralateral ear and binaural summation of the hearing. In children it is also discussed the issue of auditory deprivation. The aim of this review was to present a reflection on issues related to the bilateral cochlear implant, allowing the reader to do a search and strengthen scientifically with this issue, giving theoretical foundation to better guide and advise their patients.
Rumos do Implante Coclear bilateral no Brasil Directions of the bilateral Cochlear Implant in Brazil
Miguel Angelo Hyppolito,Ricardo Ferreira Bento
Brazilian Journal of Otorhinolaryngology , 2012, DOI: 10.1590/s1808-86942012000100001
Abstract:
Profile of Patients Treated in Outpatient Vestibular Rehabilitation at a Hospital in São Paulo  [PDF]
Bárbara Vieira Coró, Miguel Angelo Hyppolito, Camila Giacomo Carneiro Barros, Ana Paula do Rego André
International Journal of Clinical Medicine (IJCM) , 2019, DOI: 10.4236/ijcm.2019.101002
Abstract: Introduction: Currently it is very common that the search for diagnosis and treatment for curing diseases can cause vertigo or dizziness. Objective: This study sought to characterize the profile of patients seen in the clinic for vestibular rehabilitation in a tertiary hospital in the last 10 years. Methods: Survey questionnaires of patients with dizziness. Results: The prevalence of treated subjects was female 65.3% (N = 439). The average age was 54.9 years old. Dizziness type roundabout was more prevalent 33.04% (N = 222). Tinnitus occurred in 58.33% of the population. The time of most observed dizziness was less than 5 years 70.68% (N = 475). Neurovegetative symptoms appeared in 63.98% (N = 430) of the population. The bilateral normal hearing was more standard 35.26% (N = 237). The topographic diagnosis of peripheral origin was the most usual 65.47% (N = 440). Conclusion: The peripheral otoneurologic involvement was more prevalent in this population, affecting more women at an average age of 54.9 years old. The most prevalent symptoms were vertigo, nausea, tachycardia, sweating, vomiting and tinnitus, characterizing the peripheral vestibular impairment. The time of dizziness was less than five years. Audiological standard normal curve was predominant and the symptom of tinnitus was the most reported. The most prevalent comorbidity was Hypertension.
Estudo experimental anat?mico-funcional da cocleotoxicidade da gentamicina com doses habituais para recém-nascidos
Baggio, Carla Luiza;Silveira, Aron Ferreira;Hyppolito, Miguel Angelo;
Pró-Fono Revista de Atualiza??o Científica , 2009, DOI: 10.1590/S0104-56872009000200009
Abstract: background: gentamicin is an antibiotic that acts in gram-negative bacilli infections, having as a side effect ototoxicity. ototoxicity is an iatrogenic disturb provoked by drugs that modify the internal ear, affecting the cochlear and/or vestibular system and causing alterations in two important functions: equilibrium and audition. the main pediatric groups that receive aminoglicosides antibiotics are newborns who present serious infections in neonate intensive care units. aim: to verify the occurrence of external cilliary cells (ecc) caused by gentamicin with single dose schemas of 4mg/kg/day and 2,5mg/kg/day every 12 hours, through a morphological - scanning electronic microscopy (sem) and functional - distortion product otoacoustic emissions (dpoae) experimental study. method: 26 albino guinea pigs were evaluated through dpoae pre and post gentamicin treatment. the guinea pigs were sacrificed in the programmed time after the intramuscular administration of the drugs for anatomic analysis using mev. results: the evaluation of the functional state of the ecc indicated preservation of the dpoae in all of the guinea pigs. the sem results, after being photographed were analyzed in terms of the number of the ecc in the cochlear basal turn in a specific photographic field. conclusion: lesions or alterations in the functioning of the ecc of albino guinea-pigs after the use of 4mg/kg/day and 2,5mg/kg/day every 12 hours for a period 10 and 14 days were not observed.
The Influence of Sound Deprivation on Audiologic Outcomes after Cochlear Implantation  [PDF]
Maria Stella Arantes do Amaral, Ana Cláudia Mirandola Barbosa Reis, Henrique F. Pauna, Sarah C. Bernal, Eduardo T. Massuda, Miguel Angelo Hyppolito
International Journal of Clinical Medicine (IJCM) , 2018, DOI: 10.4236/ijcm.2018.91004
Abstract: The cochlear implant is a prosthesis that is capable to replace listening capability among patients with sensorineural hearing loss. Many studies suggest a negative relationship among duration of sound deprivation and audiometric gain (by means of speech perception test) after cochlear implantation. We evaluated surgical and audiologic results among post-lingual deafened adults, in different times of sound deprivation, and correlated with social isolation, presence of vertigo or tinnitus, and the speech therapy yield, between pre- and post-operative stages. A retrospective study was conducted on patients with post-lingual hearing loss, aged over 18 years old who underwent cochlear implant surgery in a public hospital from 2004 to 2014. Audiological, socio-demographic questionnaire, and manifestations of vertigo and tinnitus, during pre- and post-operative stages, were compared and correlating to the different periods of sound deprivation. Two groups were studied. The group A was composed of 38 participants (14 male and 24 female) with sound deprivation of less than 10 years; and group B was composed of 17 participants (8 male and 9 female) with sound deprivation longer than 10 years. We found no differences regarding age, sex, duration of sound deprivation, mean pure-tone audiometric results (pre- and post-surgery), and speech perception tests (pre-operatively). After one year of the surgery, we observed a significant difference between both groups, with a better performance to group A. The results of speech perception test, after cochlear implantation in group B, were worse than the results obtained in group A, although these correlations are not determinant whether to perform cochlear implant surgery or not.
Cochlear Implant in a Patient with Arnold-Chiari Syndrome  [PDF]
Maria Stella Arantes do Amaral, Daniela Soares Fonseca, Antonio Carlos dos Santos, Henrique Furlan Pauna, Eduardo T. Massuda, Ana Cláudia Mirandola Barbosa Reis, Miguel Angelo Hyppolito
Case Reports in Clinical Medicine (CRCM) , 2018, DOI: 10.4236/crcm.2018.72014
Abstract: Objective: To verify the efficacy of cochlear implantation in a patient with Arnold-Chiari syndrome. Design: Review of a medical chart from a patient with Arnold-Chiari syndrome that underwent to cochlear implant surgery. Case report: A 6 year-old female, with meningomyelocele and congenital hydrocephalus, deaf in the past 3 years, after meningitis. At that time, she used oral language with adequate speech development. Tone audiometry revealed bilateral profound sensorineural hearing loss. The MRI was compatible with the Arnold-Chiari syndrome. Cochlear implantation was performed on the left ear with MED-EL? Implant (model SONATATi100). Currently, the child is 12 year-old, performs speech therapy three times a week, with good hearing and language development. Conclusion: Despite the presence of Arnold-Chiari syndrome (Chiari type II) with neurological disorders and with ventriculoperitoneal shunt, patient had good hearing results after cochlear implant surgery.
Cocleotoxicidade da gentamicina por doses habituais para neonatos - estudo funcional
Baggio, Carla Luiza;Silveira, Aron Ferreira da;Hyppolito, Miguel Angelo;Salata, Flávia Fiacadori;Rossato, Maria;
Brazilian Journal of Otorhinolaryngology , 2010, DOI: 10.1590/S1808-86942010000100015
Abstract: the early identification of hearing impairment allows for an intervention still in the "critical" and ideal period of hearing and language stimulation. pediatric ototoxicity is a very controversial topic. there have been variable percentages of ototoxicity cases in children with different aminoglycosides antibiotics. the main pediatric groups whom receive aminoglycosides are newborns with severe infections on the neonatal icu. aim: to check the functional aspect of the cochlear external hair cells and treatment regimens used to treat infections during the neonatal period. study design: experimental. materials and methods: we studied 26 albino guinea pigs, through distortion product otoacoustic emissions, before and after the use of gentamicin. results: in all the assessments, the external hair cells functional status, studied by means of the distortion product otoacoustic emissions, proved preserved. conclusion: in the present study, we did not notice changes in outer hair cell function in the albino guinea pigs treated with gentamicin in the doses of 4 mg/kg/day and 2.5 mg/kg/day every 12 hours for 10 and 14 days.
Ototoxicidade da cisplatina e otoprote??o pelo extrato de ginkgo biloba às células ciliadas externas: estudo anat?mico e eletrofisiológico
Hyppolito, Miguel Angelo;Oliveira, José Ant?nio A. de;Rossato, Maria;Holanda, Francisco;
Revista Brasileira de Otorrinolaringologia , 2003, DOI: 10.1590/S0034-72992003000400011
Abstract: cisplatin is an antineoplastic drug for cancer treatment in children and adults. the side effects of cisplatin ototoxycity are important with irreversible auditory and bilateral damage to high frequencies (4khz - 8 khz). reports recognize some drugs that are associated with cisplatin to obtain an otoprotector effect. the ototoxycity mechanisms of cisplatin are related to injury of conduct the hair cell oxidation mechanism, with particular injury to outer hair cells. aim: we intend to studies using otoacoustic emissions - distortion products (dpoea) and scanning microscopy to verify the action of ginkgo biloba (gbe-761) that has well known antoxidizing characteristics, that can function like otoprotector effects. study design: experimental. material and method: we use an experimental guinea pig model. we found dpoea positive before and after treatment in the gbe group (100 mg/ kg/ day - oral) and after 90 minutes cisplatin (8,0 mg/ kg/ day - intraperitoneal - 8 consecutive days). results: the normal cilium architecture of outer hair cells was supported in all cochlear spirals and in the group treated only with cisplatin (8,0 mg/ kg/ day - intraperitoneal - 8 consecutive days), the dpoea was not present and strong injury to cilium of outer hair cells showed cilium disorders upon scanning microscopy. conclusion: we conclude that gbe has a potential otoprotector effect against cisplatin ototoxycity and could be used in clinical trials.
Conhecimento da anatomia da orelha de cobaias e ratos e sua aplica??o na pesquisa otológica básica
Albuquerque, Agnes Afrodite Sumarelli;Rossato, Maria;Oliveira, José Antonio Apparecido de;Hyppolito, Miguel Angelo;
Revista Brasileira de Otorrinolaringologia , 2009, DOI: 10.1590/S0034-72992009000100007
Abstract: the use of animal samples is important in otologic research and understanding the anatomy of their ears help make proper use of them in research projects. aim: to study guinea pig's and rat's ears under light microscopy(lm) and scanning electron microscopy(sem) and understand their anatomical advantages in basic otologic research. materials and methods: the temporal bones, tympanic bullas and cochleas from three albino guinea pigs and rats were photographed and analyzed under lm and sem. results: rats aren't as simple to handle as guinea pigs, and often present with otitis media. rats have a fragile junction of the tympanic bulla, two and half turns in the cochlea, and their tympanic membranes do not seal off the entire external auditory canal. guinea pigs have full bullas, their incus and malleus are fused and they have three and half cochlear turns. under sem, guinea pigs and rats have tectori membrane, raissner's membrane and the organ of corti. only guinea pigs have hensen's cells. conclusion: guinea pigs were considered easy to handle for microdissection purposes because of the size and robustness of their temporal bones, and for surgical experiments involving the stapes, the oval window and the tympanic membrane. under sem there are similarities guinea pigs and rats, and both can be used in inner ear studies.
Miringoplastia com a utiliza??o de um novo material biossintético
Oliveira, José Antonio Apparecido de;Hyppolito, Miguel Angelo;Coutinho Netto, Joaquim;Mrué, Fátima;
Revista Brasileira de Otorrinolaringologia , 2003, DOI: 10.1590/S0034-72992003000500010
Abstract: myringosplaty is a surgery that is performed to control infections in middle ear, to reconstruct the sound conducting mechanism for the oval window and protection of the round window. some materials are used to reconstruct the tympanic membrane like autologous temporalis fascia, cartilage-perichondium graft taken from the tragus, cartilage only, dura mater human placental graft. it is important the vascular support to the graft with well-vascularized flap in wide perforations. aim: the main goal of this work is shown the use of a new biomaterial, the natural latex membrane with polylysin. study design: longitudinal cohort. material and method: this material was developed from department of biochemistry from faculdade de medicina de ribeir?o preto universidade de s?o paulo. the natural latex membrane is used stimulating neovessels and organized tecidual growing in different parts and tissues of the human body. this material promotes any allergic reaction and is innocuous to the human tissue. the 238 ears with tympanic membrane perforation resulted from chronic middle ear infection and thek was going through myringoplasty with autologous temporalis fascia and natural latex membrane. the ages were 7 to 76 years. results: the first results show 181 (90,5%) healing tympanic membrane perforation, 96 healing of wide perforation 73 medium perforation and 12 small one. neovessels could be seen in all grafts and remaining tympanic membrane. this is not a habitual funding when the natural latex membrane is not used. conclusion: according to these results we can conclude that the natural latex membrane can be used as a temporary implant in myringoplasty, improving the well vascularized of remaining tympanic membrane.
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