Diagnosis and treatment strategies of 56 cases of middle ear myoclonus / 中华耳鼻咽喉头颈外科杂志

Objective: To analyze the clinical characteristics and treatment of middle ear myoclonus. Methods: Fifty-six cases of middle ear myoclonus were enrolled in Shandong Provincial ENT Hospital, Shandong University from September 2019 to August 2021, including 23 males and 33 females. The age ranged from 6 to 75 years, with a median age of 35 years; Forty-seven cases were unilateral tinnitus, nine cases were bilateral tinnitus. The time of tinnitus ranged from 20 days to 8 years. The voice characteristics, inducing factors, nature (frequency) of tinnitus, tympanic membrane conditions during tinnitus, audiological related tests, including long-term acoustic tympanogram, stapedius acoustic reflex, pure tone auditory threshold, short increment sensitivity test, alternate binaural loudness balance test, loudness discomfort threshold, vestibular function examination, facial electromyography, and imaging examination were recorded. Oral carbamazepine and/or surgical treatment were used. The patients were followed up for 6-24 months and the tinnitus changes were observed. Results: Tinnitus was diverse, including stepping on snow liking sound, rhythmic drumming, white noise, and so on. The inducing factors included external sound, body position change, touching the skin around the face and ears, speaking, chewing and blinking, etc. Forty-four cases were induced by single factor and 9 cases were induced by two or more factors. There was no definite inducing factor in 1 case. One patient had tinnitus with epilepsy. One case of traumatic facial paralysis after facial nerve decompression could induce tinnitus on the affected side when the auricle moved. Tympanic membrane flutter with the same frequency as tinnitus was found in 12 cases by otoscopy, and the waveform with the same frequency as tinnitus was found by long-term tympanogram examination. There were 7 patients with no tympanic membrane activity by otoscopy, the 7 cases also with the same frequency of tinnitus by long-term tympanogram examination, but the change rate of the waveform was faster than that of the patients with tympanic membrane flutter. All patients with tinnitus had no change in hearing. One case of tinnitus complicated with epilepsy (a 6-year-old child) was treated with antiepileptic drug (topiramate) and tinnitus subsided. One case suffered from tinnitus after facial nerve decompression for traumatic facial paralysis was not given special treatment. Fifty-four cases were treated with oral drug (carbamazepine), of which 10 cases were completely controlled and 23 cases were relieved; 21 cases were invalid. Among the 21 patients with no effect of carbamazepine treatment, 8 patients were treated by surgery, 7 patients had no tinnitus after surgery, 1 patient received three times of operation, and the third operation was followed up for 6 months, no tinnitus occurred again. The other 13 cases refused the surgical treatment due to personal reasons. Conclusions: Middle ear myoclonus tinnitus and the inducing factors manifestate diversity. Oral carbamazepine and other sedative drugs are effective for some patients, and surgical treatment is feasible for those who are ineffective for medication.

Analysis of clinical characteristics of middle ear osteoma at different locations / 中华耳鼻咽喉头颈外科杂志

Objective: To explore the clinical characteristics, intervention and treatment of tympanic osteoma at different locations. Methods: The medical history, audiological and imaging examination, operation and follow-up results of two patients with tympanic osteoma at different sites were reviewed and summarized. Furthermore, the clinical characteristics and interventions of 36 patients reported in literatures with tympanic osteomas were also summarized and analyzed. Results: Osteoma of the two patients collected in this study located at promontory and incus respectively;both of them presented with intact tympanum and conductive deafness, without obvious etiology or predisposing factor. Both of them underwent surgeries and the hearing improved significantly. For patient one, the ossicular chain was intact and restored to activity after removed the osteoma. For patient two, an artificial ossicle was implanted after removed the osteoma and incus. In the 36 patients reported in literatures, the average age was 26.5 years, and 39.47% of them located at promontory; in addition, the main symptoms of them were progressive hearing loss, tinnitus and ear stuffy. Conclusions: Patients with tympanic osteoma are characterized by conduction deafness with intact tympanic membrane, and the most common lesion is promontory. Hearing can be restored by excision of the osteoma and maintenance or reconstruction of the ossicle chain.

Effect of malleostapedotomy procedure on 17 cases of congenital middle ear malformation / 中华耳鼻咽喉头颈外科杂志

Objective: To conclude the clinical features and the postoperative efficacy of congenital middle ear malformation treated with Malleostapedotomy (MS), and to explore the security and effectiveness of MS surgery. Methods: The clinical data of 17 patients (18 ears) with congenital middle ear malformation undergoing MS procedure were analyzed. There were 10 males (11 ears) and 7 females (7 ears), aged from 7 to 48 years. The imaging examination, pure-tone audiometry, intraoperative findings and postoperative hearing improvement of these patients were analyzed and summarized, and software SPSS23.0 was used for statistical analysis. Rusults All the 17 patients (18 ears) presented with hearing loss since childhood on the affected sides. Preoperative high resolution CT (HRCT) of the temporal bone revealed definite malformations in 9 ears (6 ears with incus long process dysplasia and 3 ears with anterior and posterior crus dysplasia). Before surgery, the mean bone conductive hearing threshold at 500, 1 000, 2 000 and 4 000 Hz was (15.6±10.2) dB HL, the mean air conductive hearing threshold was (60.6±9.7) dB HL, and the mean air-bone gap was (45.0±8.9) dB. During the surgery, all 18 ears were found to be accompanied by absence or hypoplasia of incus long process. 12 ears had stapes fixation, 6 ears had oval window atresia. All patients were treated with MS procedure by using Piston. The patients were followed up for 3 months to 1 year. The mean bone conductive hearing threshold was (14.7±8.8) dB HL. The mean air conductive hearing threshold was (37.7±11.6) dB HL, and the mean air-bone gap was (23.0±8.0) dB. There were statistically significant differences in the mean air conductive hearing threshold and mean air-bone gap before and after surgery (P<0.05). While there were no statistically significant differences in the mean bone conductive hearing threshold before and after surgery (P=0.550). Conclusions: MS procedure is safe and reliable in patients with congenital middle ear malformation of incus long process dysplasia, stapes fixation or oval window atresia. HRCT is useful in evaluating the major deformity of ossicular chain and facial nerve deformity. However, it is not enough to evaluate the joint of incus-stapes and oval window atresia. MS surgery in middle ear malformation requires advanced surgical experience and skills. The hearing improvement can be significant, even though some air-bone gap after surgery exist.

Comparison of palonosetron-dexamethasone and ondansetron-dexamethasone for prevention of postoperative nausea and vomiting in middle ear surgery: a randomized clinical trial / Comparação entre palonosetrona-dexametasona e ondansetrona-dexametasona na prevenção de náuseas e vômitos no pós-operatório de cirurgia do ouvido médio: estudo clínico randomizado

Abstract Background: Postoperative nausea and vomiting is the second most common complaint in the postoperative period after pain. The incidence of postoperative nausea and vomiting was 60-80% in middle ear surgeries in the absence of antiemetic prophylaxis. Because of this high incidence of postoperative nausea and vomiting, we aimed to assess the effect of palonosetron-dexamethasone and ondansetron-dexamethasone combination for the prevention of postoperative nausea and vomiting in patients of middle ear surgery. Methods: Sixty-four patients, scheduled for middle ear surgery, were randomized into two groups to receive the palonosetron-dexamethasone and ondansetron-dexamethasone combination intravenously before induction of anesthesia. Anesthesia technique was standardized in all patients. Postoperatively, the incidences and severity of nausea and vomiting, the requirement of rescue antiemetic, side effects and patient satisfaction score were recorded. Results: Demographics were similar in the study groups. The incidence difference of nausea was statistically significant between groups O and P at a time interval of 2-6 hours only (p = 0.026). The incidence and severity of vomiting were not statistically significant between groups O and P during the whole study period. The overall incidence of postoperative nausea and vomiting (0-24 hours postoperatively) was 37.5% in group O and 9.4% in group P (p = 0.016). Absolute risk reduction with palonosetron-dexamethasone was 28%, the relative risk reduction was 75%, and the number-needed-to-treat was 4. The patient's satisfaction score was higher in group P than group O (p = 0.016). The frequency of rescue medication was more common in group O than in group P patients (p = 0.026). Conclusion: The combination of palonosetron-dexamethasone is superior to ondansetron-dexamethasone for the prevention of postoperative nausea and vomiting after middle ear surgeries.

Resumo Justificativa: Náusea e vômito no pós-operatório é a segunda queixa pós-operatória mais frequente após a dor. Sem profilaxia antiemética, a incidência de náusea e vômito no pós-operatório foi de 60−80% após cirurgia do ouvido médio. Dada a alta incidência relatada de náusea e vômito no pós-operatório, nosso objetivo foi avaliar o efeito da combinação de palonosetrona-dexametasona e ondansetrona-dexametasona na prevenção de náusea e vômito no pós-operatório em pacientes submetidos a cirurgia do ouvido médio. Método: Sessenta e quatro pacientes programados para cirurgia de ouvido médio foram aleatoriamente divididos em dois grupos. Um recebeu a combinação de palonosetrona-dexametasona (grupo P) e o outro ondansetrona-dexametasona (grupo O) por via intravenosa antes da indução anestésica. A técnica anestésica foi padronizada em todos os pacientes. No pós-operatório, foram registradas incidência e gravidade das náuseas e vômitos, necessidade de antiemético de resgate, efeitos colaterais e índice de satisfação dos pacientes. Resultados: As características demográficas foram semelhantes nos grupos estudados. A diferença na incidência de náusea foi estatisticamente significante entre os grupos O e P apenas no intervalo de tempo entre 2 e 6 horas (p = 0,026). A incidência e gravidade de vômito não foram estatisticamente significantes entre os grupos O e P durante todo o período do estudo. A incidência geral de náusea e vômito no pós-operatório (0−24 horas de pós-operatório) foi de 37,5% no grupo O e de 9,4% no grupo P (p = 0,016). A combinação palonosetrona-dexametasona associou-se com redução do risco absoluto de 28%, redução do risco relativo de 75%, e o número necessário para tratar foi 4. O escore de satisfação do paciente foi maior no grupo P (p = 0,016). A frequência da medicação de resgate foi mais comum no grupo O (p = 0,026). Conclusão: A combinação de palonosetrona-dexametasona é superior à ondansetrona-dexametasona na prevenção da náusea e vômito no pós-operatório após cirurgia de ouvido médio.

Resolução cirúrgica de pólipo inflamatório em ouvido médio de felino através da técnica de avulsão e tração por abordagem lateral: relato de caso / Surgical resolution of feline middle ear inflammatory polyp by lateral approach traction and avulsion technique: case report

O objetivo desse trabalho foi descrever um caso de pólipo inflamatório em ouvido médio de um felino e sua resolução cirúrgica através da avulsão e tração da massa após abordagem lateral. Um felino, fêmea, de 2 anos de idade, foi atendido no Hospital Veterinário Professor Sylvio Barbosa Cardoso, apresentando prurido intenso, dor e secreção fétida em região auricular. Pelo exame físico foi possível observar um nódulo em região de ouvido médio esquerdo. Associado a isso, o animal apresentava "headtilt" (inclinação da cabeça para o lado afetado). Foram solicitados exames hematológicos, radiografia de crânio e citologia da massa. O animal foi encaminhado para cirurgia de extirpação da massa. Foi feita uma incisão na pele sob o canal auditivo vertical palpável. A cartilagem foi liberada até o nível da junção entre as cartilagens auricular e anular. Com o auxílio de um fórceps, o pólipo foi agarrado e delicadamente girado até ser completamente extirpado de sua origem. A cartilagem e o subcutâneo foram fechados com material de sutura monofilamentar 4-0 e a pele foi fechada em um padrão de sutura subdérmica usando o mesmo material. A peça foi encaminhada para exame histopatológico, pelo qual confirmou-se a suspeita de pólipo inflamatório, através da observação de epitélio colunar ciliado. Utilizando a técnica cirúrgica TALA (avulsão e tração após abordagem lateral) foi possível obter melhora do quadro clínico do animal referido, rápida recuperação pós-cirúrgica e sem nenhuma complicação decorrente da técnica. Essa técnica, portanto, se mostrou satisfatória, melhorando significativamente a qualidade de vida do animal.

The aim of this study was to describe a case of inflammatory polyp in the middle ear of a cat and its surgical resolution through avulsion and mass traction after lateral approach. A female feline, two year old, was admitted at the Hospital Veterinário Professor Sylvio Barbosa Cardoso, presenting intense itching, pain and fetid discharge in the ear region. Physical examination revealed a nodule in the left middle ear region. Associated with this, the animal presented head tilt (inclination of the head to the affected side). Hematological examinations, skull radiography and mass cytology were requested. The animal was referred for polyp removal surgery. A skin incision was made under the palpable vertical ear canal. The cartilage was released to the level of the junction between the auricular and annular cartilages. With the help of a forceps, the polyp was grasped and gently rotated until completely removed from its origin. The cartilage and subcutaneous tissue were closed with 4-0 monofilament suture material and the skin was closed in a subdermal suture pattern using the same material. The piece was referred for histopathological examination, which confirmed the suspicion of inflammatory polyp by observing ciliated columnar epithelium. Using the TALA surgical technique (avulsion and traction after lateral approach) it was possible to obtain improvement of the clinical 3 picture of the referred animal, rapid postoperative recovery and without any complications resulting from the technique. This technique therefore proves satisfying, significantly improving the quality of life of the animal.

Malformaciones del oído externo y medio en pediatría: características clínico audiológicas y tratamiento / External and middle ear malformations in pediatrics: Clinical and audiological features and treatment

Objetivo: Describir las características clínicas y audiológicas de los pacientes que presentan malformaciones del oído externo y medio. Detallar la intervención con procesadores de conducción ósea y los distintos implantes como tratamiento para niños con hipoacusia auditiva moderada conductiva o mixta debido a este tipo de anomalías congénitas. Material y métodos: Se realizó un estudio prospectivo, longitudinal y observacional de 223 pacientes consecutivos con malformación auricular bilateral o unilateral atendidos en una primera consulta o en seguimiento desde octubre de 2013 hasta noviembre de 2014. Los datos a analizar de estos pacientes incluyeron: edad, sexo, existencia de otras malformaciones o síndromes asociados, uni o bilateralidad de la malformación, clasificación de la misma en grados, características del conducto auditivo externo, del nervio facial y la existencia de colesteatoma. Se realizaron evaluaciones audiológicas adecuadas para la edad madurativa del paciente. Se describen los distintos tratamientos realizados (procesadores de conducción ósea con vincha o implante). Resultados: 33% (73/223) presentó malformación auricular bilateral, con una mediana de edad de 2 años (rango 1-14 años). El 67%, (150/223)) presentó malformación auricular unilateral: 49/150 en el lado izquierdo; 101/150 en el lado derecho, con una mediana de edad de 7 años, (rango 1-16 años). El 43% (96/223) sexo femenino y el 57% por ciento (127/223) sexo masculino. El 31% (23/73) de los niños con malformación bilateral y el 16% (24/150) de los niños con malformación unilateral presentaban síndromes congénitos. Con respecto al grado de malformación, 56% de los pacientes presentaron malformación auricular grado III/IV, 28% malformación grado II y 16% malformación grado I. En el 68% de los casos presentaban atresia de conducto auditivo externo, 20% estenosis severa y 12% estenosis leve con malformación de oído medio. El 3,5% de los pacientes (5/223) tenía parálisis facial. El 4,5% de los pacientes (8/223) presentó colesteatoma en un conducto auditivo externo con estenosis severa. Se diagnosticó hipoacusia conductiva o mixta moderada en el 98,6% de los oídos con malformación. El 1,4% presentó hipoacusia neurosensorial. Dieciocho niños con malformación bilateral menores de 18 meses de vida fueron equipados con dispositivos de conducción ósea con vincha. En cuatro de estos pacientes los dispositivos provistos fueron bilaterales. En los niños mayores de cinco años se indicó cirugía de implante en 14 casos. En casos unilaterales se indicó procesador de sonido con vincha en seis niños menores de 18 meses de vida. Cinco de ellos ya han sido proporcionados y la están utilizando. En niños mayores de cinco años se indicó cirugía con implantes osteointegrados en 6 casos (AU)

Objective: To describe the clinical and audiological features of patients presenting with external and middle ear malformations. To detail the intervention with bone conduction processors and different implants in the treatment of children with moderate conductive or mixed hearing loss, conductive or mixed due to this type of congenital anomalies. Material and methods: A longitudinal, prospective, observational study was conducted in 223 consecutive patients with bilateral or unilateral aural malformations seen at the first visit or in follow-up between October 2013 and November 2014. The following data were analyzed: age, sex, associated malformations or syndromes, uni- or bilaterality of the malformation, classification of the malformation, characteristics of the external ear canal, the facial nerve, and presence of cholesteatoma. Adequate audiological evaluations for age were performed. The different management options are described (bone conduction devices with headband or implant). Results: 33% (73/223) presented with a bilateral ear malformation at a median age of 2 years (range, 1-14 years); 67% (150/223)) had a unilateral ear malformation: 49/150 on the left side and 101/150 on the right side, at a median age of 7 years (range, 1-16 years). Overall, 43% (96/223) were female and 57% (127/223) were male. Of all the children, 31% (23/73) with a bilateral malformation and 16% (24/150) with unilateral malformation had congenital syndromes. Regarding the degree of malformation, 56% of the patients had a grade III/IV ear malformation, 28% a grade II malformation, and 16% a grade I malformation; 68% of the cases had external ear canal atresia, 20% severe stenosis, and 12% mild stenosis with a middle ear malformation; 3.5% of patients (5/223) had facial paralysis; 4.5% (8/223) had cholesteatoma in the external ear canal with severe stenosis. Moderate conductive or mixed hearing loss was diagnosed in 98.6% of the ears with malformation. Sensorineural hearing loss was observed in 1.4%. Eighteen children with bilateral malformation under 18 months of age were fitted with a bone conduction device with a headband. Four of these patients needed bilateral devices. In 14 children over five years of age, implant surgery was indicated. In six children under 18 months of age with a unilateral malformation, a sound processor with headband was indicated. Five of them have already been fitted with the device. mplantation of a bone-anchored hearing aid was indicated in six children over five years of age (AU)

Sinus tympani y recidiva en cirugía de colesteatoma / Sinus tympani and recidiva in cholesteatoma surgery

RESUMEN Introducción: El sinus tympani (ST) es una de las áreas que más presenta colesteatoma residual. Recientemente se ha clasificado en 3 tipos de acuerdo a su morfología. Objetivos: Determinar el tipo de ST en los pacientes sometidos a cirugía de colesteatoma y analizar su impacto como factor de recidiva. Material y método: Revisión de fichas clínicas de pacientes sometidos a cirugía de colesteatoma entre los años 2004 y 2015 en el Hospital Regional de Concepción. Análisis de la tomografía axial computarizada (TAC) preoperatoria y posterior evaluación clínica de los pacientes operados mediante mastoidectomía canal wall down (CWD). Resultados: En el periodo descrito se operaron 271 oídos. El 60% de los casos analizados presentó ST tipo A y 40% ST tipo B. Se identificaron 12 casos de recidiva, 3 ST tipo B y 9 ST tipo A, sin diferencia estadísticamente significativa entre ambos. Discusión: Distinto a lo reportado en la literatura el tipo de ST más frecuente en nuestro estudio fue el tipo A, lo que podría corresponder a una variable étnica. Conclusión: El estudio preoperatorio con TAC es una herramienta útil para evaluar el tipo y compromiso del ST. Las diferencias anatómicas entre ST tipo A y B parece no ser un factor determinante de recidiva en mastoidectomías CWD.

ABSTRACT Introduction: Sinus tympani (ST) is one of the areas with the most residual cholesteatoma. Recently it has been classified in 3 types according to its morphology. Aim: To determine the type of ST in patients undergoing cholesteatoma surgery and to analyze its impact as a relapse factor. Material and method: Review of clinical files of patients submitted to cholesteatoma surgery between 2004 and 2015 at the Regional Hospital of Concepción. Preoperative computed axial tomography (CT) analysis and subsequent clinical evaluation of patients operated by canal wall down mastoidectomy (CWD). Results: In the described period 271 ears were operated. 60% of the cases analyzed had ST type A and 40% ST type B. Twelve cases of relapse were identified, 3 ST type B and 9 ST type A, with no statistically significant difference between the two. Discussion: Unlike to what is reported in the literature, the most common ST type in our study was type A, which could correspond to an ethnic variable. Conclusion: The preoperative study with CT is a useful tool to evaluate the type and commitment of ST. The anatomical differences between ST type A and B seems not to be a determinant factor of relapse in CWD mastoidectomies.

Disección cadavérica endoscópica de oído medio / Endoscopic cadaver dissection of middle ear / Dissecção endoscópica de orelha média em cadáveres

El avance tecnológico en los últimos tiempos ha permitido la creación de nuevos abordajes quirúrgicos. En este sentido surge el endoscopio como elemento capaz de ofrecer una gran visualización de los diferentes accidentes anatómicos de la cavidad timpánica sin necesidad de resecar tejido óseo circundante, ofreciendo de alguna manera la posibilidad de resolver patologías otológicas mediante un abordaje mínimamente invasivo. En este trabajo se demuestran los diferentes pasos de la disección cadavérica endoscópica de oído con el fin de facilitar al cirujano en formación el inicio en la materia.

Technological advances during the last time have enabled the creation of new surgical approaches. Endoscopic surgery comes out in this sense as an element capable of offering great visualisation of the different anatomical structures within the tympanic cavity without the need of removing surrounding bone structure bringing the possibility of treating otological pathology with a minimum invasive approach. In this paper the different steps to cadaveric disection are shown in order to initiate the novel surgeon in the subject.

O avanço tecnológico nos últimos tempos tem permitido a criação de novas abordagens cirúrgicas. Neste sentido surge o endoscópio como elemento capaz de oferecer uma visualização de diferentes acidentes anatômicos da cavidade timpânica sem necessidade de ressecar tecido ósseo circundante, oferecendo de alguma maneira a possibilidade de resolver patologias otológicas usando uma abordagem minimamente invasiva. Neste trabalho se mostra as diferentes etapas da dissecção endoscópica de ouvido com o fim de facilitar o cirurgião em formação o início na matéria.

Middle ear packing materials: comparison between absorbable hemostatic gelatine sponge and sugarcane biopolymer sponge in rats / Materiais de suporte na orelha média: comparação entre a esponja de gelatina absorvível e a esponja do biopolímero da cana-de-açúcar em ratos

INTRODUCTION: Several biomaterials can be used in ear surgery to pack the middle ear or support the graft. The absorbable gelatin sponge is the most widely used, but it may produce fibrosis and impair ventilation of the middle ear. OBJECTIVE: This experimental study aimed to investigate the inflammatory effects of the sugarcane biopolymer sponge (BP) in the rat middle ear compared with absorbable gelatin sponge (AGS). MATERIALS AND METHODS: Prospective experimental study design. Thirty adult female Wistar rats were allocated to receive the BP sponge into the right ear and AGS into the left ear. Animals were randomly killed at 4 and 12 weeks post-procedure. Qualitative histological assessments were performed to evaluate the inflammatory reaction in the tympanic bullae. RESULTS: The BP sponge caused inflammation more intense and persistent than AGS. The BP was not absorbed during the experiment. Fibrosis was observed only in the ears with AGS. There were thickening of the mucosa and neoangiogenesis in the group of AGS. CONCLUSION: Despite inflammation, the BP sponge produced less fibrosis and neoangiogenesis compared to AGS. The sponge BP appeared to be a non-absorbable biomaterial in the middle ear. .

INTRODUÇÃO: Existem diversos biomateriais que podem ser utilizados na cirurgia otológica para preencher a cavidade da orelha média ou dar suporte a enxertos. A esponja de gelatina absorvível é a mais utilizada, mas pode provocar fibrose e prejudicar a ventilação da orelha média. OBJETIVO: Investigar os efeitos da reação inflamatória provocada pela esponja do biopolímero da cana-de-açúcar (BP) comparada a esponja de gelatina absorvível (EGA) na mucosa da orelha média de ratos. MATERIAIS E MÉTODOS: Estudo experimental prospectivo. A esponja do BP foi implantada na orelha direita e a EGA na orelha esquerda de 30 ratos Wistar fêmeas. Os animais foram sacrificados com 4 e 12 semanas após o procedimento. Avaliação histológica qualitativa foi realizada para verificar a reação inflamatória na bula timpânica. RESULTADOS: A esponja do BP provocou exsudato inflamatório mais intenso e persistente que a EGA. O BP não foi absorvido durante o tempo de observação. Traves de fibrose foram observadas apenas nos ouvidos com a EGA. Houve espessamento da mucosa e neoangiogênese no grupo da EGA. CONCLUSÃO: Apesar da reação inflamatória, a esponja do BP provocou menos fibrose e neoangiogênese quando comparada a EGA. A esponja do BP comportou-se como um biomaterial não absorvível na orelha média. .

Micro-endoscopic ear anatomy of guinea pig applied to experimental surgery

PURPOSE: To describe topographic and endoscopic anatomy of guinea pig ear for development of surgical approaches in experimental studies. METHODS: Experimental study. Eight adult guinea pigs (Cavia porcellus) were used in this study. Four animals were described through endoscopic view and four animals were used to describe topographic anatomy. RESULTS: The main structures of middle ear were well identified through endoscopy view: oval and round window, ossicles and vascular structures. Temporal bone position, landmarks and its relations to skull are perceived with topographic description. CONCLUSION: Topographic anatomic description allowed exposition of temporal bone relations for external surgical approaches. Alternatively, grooves and middle ear structures were identified and may be used to transcanal accesses. .

Enxertos e anastomoses do nervo facial na orelha média: caixa do tímpano e mastoide / Facial nerve grafting and end-to-end anastomosis in the middle ear: tympanic cavity and mastoid

O nervo facial, quando seccionado, pode ser reparado em seu tronco por enxerto ou anastomose. OBJETIVO: Discutir as técnicas em questão e mostrar o que podemos esperar das mesmas. MÉTODO: Foram operados sete pacientes com secção do nervo facial. As cirurgias foram quatro enxertos e três anastomoses. Cinco paralisias foram iatrogênicas e duas por projéteis de arma de fogo. A avaliação da recuperação motora foi feita pela tabela de Janssen. RESULTADOS: Obtivemos 72,5% em média de recuperação motora nos casos de enxerto e 73,3% nos casos de anastomose. CONCLUSÃO: 1. Enxertos e anastomoses são soluções adequadas para reparar o nervo facial seccionado, mas nunca permitem uma recuperação facial completa, podendo ocorrer sincinesias. 2. Em princípio, o nosso objetivo é fazer a anastomose, mas quando existe tração mínima nos cotos do facial, preferimos os enxertos. 3. Em ambas as técnicas, conseguimos acima de 70% de recuperação motora em média (72,5% nos enxertos e 73,3% nas anastomoses).

Sectioned facial nerves can be repaired with grafting or end-to-end anastomosis. OBJECTIVE: To discuss these repair procedures and what can be expected of them. METHOD: Seven patients with sectioned facial nerves were included in the study. Four underwent grafting and three were offered end-to-end anastomosis. Facial nerve palsy was iatrogenic in five patients and was caused by bullet wounds in two. Assessment of motor function recovery was based on Janssen's scale. RESULTS: Mean motor recovery was rated at 72.5% for subjects offered grafting and 73.3% for patients submitted to anastomosis. CONCLUSION: 1. Grafting and anastomosis are proper solutions to repair sectioned facial nerves; complete recovery is never attained; synkinesis may occur. 2. In principle anastomosis is the procedure of choice, but when there is minimal traction in the facial nerve stump grafting is preferred. 3. Both procedures yielded mean motor recovery rates above 70% (72.5% for grafting and 73.3% for anastomosis).

Experiencia en miringoplastía transcanal con pericondrio tragai inlay / Experience in transcanal myringoplasty with inlay tragal perichondrium

Introducción: La timpanoplastía está orientada a la reconstrucción anatomofuncional del oído medio que realizada en la membrana timpánica se denomina miringoplastía. Objetivo: Evaluar los resultados anatomofuncionales de la miringoplastía transcanal con pericondrio tragal inlay en pacientes intervenidos en el Servicio de Otorrinolaringología del Hospital San Camilo entre 2004 y 2009. Material y método: Estudio retrospectivo descriptivo de fichas de 56 pacientes entre 7 y 77 años. Universo: 60 oídos, muestra: 48 oídos con edad promedio de 34 años. Se evaluaron resultados anatómicos según sexo, edad, ubicación, causa de perforación y mejoría funcional objetivada por audiometría. Resultados: La integridad anatómica posquirúrgica es de 81,3% sin diferencias según género. Según edad existe diferencia significativa de 93,3% para el tramo 7-19 años respecto del total. Las perforaciones centrales tuvieron un éxito de 100%. La causa más frecuente de perforación fue por otitis media crónica simple (75%) con una integridad posquirúrgica del 80,5%. El 97,6% logró mejorar o mantener el nivel de audición, estableciéndose diferencialmente mejoría funcional en 52,4%, y una mantención en 45,2%. Conclusión: Los mejores resultados para esta técnica se obtienen en menores de 20 años con perforaciones centrales, siendo una técnica ideal que conserva la estructura de la membrana timpánica para futuras intervenciones.

Introduction: Tympanoplasty is orientated to the anatomofunctional reconstruction of the middle ear, which is named myringoplasty, when performed in the tympanic membrane. Aim: To evaluate the anatomofunctional results of transcanal myringoplasty with inlay tragal perichondrium in patients controlled in the Otorhinolaryngology Unit of San Camilo Hospital, between 2004 and 2009. Material and method: Retrospective descriptive study on files of 56 patients between 7 and 77 years of age. Universe: 60 ears, sample: 48 ears with average age 34 years. Anatomical results were evaluated according to sex, age, location, cause of perforation and functional improvement measured by audiometry. Results: The overall anatomical postsurgical integrity is 81,3 % without differences between sexes. According to age there is a significant difference for the section between 7-19 years of age respect of the total (93,3 %). Central perforations had a 100% success rate. The most frequent reason of perforation was simple chronic otitis media (75%) with a postsurgical integrity of 80,5 %. 97,6 % managed to improve or maintain hearing level, (52,4 % gained functional improvement, and 45,2 % maintained hearing level). Conclusion: Using this technique, best results are obtained in patients younger than 20 years of age, with central perforations. It is an ideal method that preserves the structure of the tympanic membrane for future interventions.

Prophylactic administration of haloperidol plus midazolam reduces postoperative nausea and vomiting better than using each drug alone in patients undergoing middle ear surgery

The efficacy of using midazolam or haloperidol for prevention of postoperative nausea and vomiting [PONV] has been investigated before. The main object of the present study was to evaluate the anti-emetic effects of combining administration of intravenous haloperidol with intravenous midazolam on PONV in patients underwent middle ear surgery in comparison with using each drug alone. Study design was randomized, double-blind, placebo-controlled. 80 patients, aged 18-60 years, scheduled for middle ear surgery in Kashani Hospital Medical Center under general anesthesia were enrolled in this randomized, double-blind, placebo-controlled study. Patients were divided into 4 groups of 20 each and received haloperidol 2 mg i.v. [Group H]; midazolam 2 mg i.v. [Group M]; haloperidol 2 mg plus midazolam 2 mg i.v. [Group HM]; saline i.v. [Group C]. The incidences of PONV and complete response were evaluated at 0-2 hours after arrival to the PACU and 2-24 hours after arrival to the ward in 4 groups. Patients in group HM had significantly lower incidence of PONV compared with groups H, M, and C throughout 0-24 h [P<00.5]. The HM group had the lowest incidence of PONV [0-2, 2-24, and 0-24 h] and the highest incidence of complete response. Postoperative anti-emetic requirement was significantly less in group HM compared with group M or H [P<0.05]. Combine administration of haloperidol 2 mg plus midazolam 2 mg significantly reduced PONV better than using each drug alone in patients underwent middle ear surgery under general anesthesia

Colleras obstruidas: ¿Qué hacer?: un modelo experimental ex vivo / Clearing blocked tympanostomy tubes: an ex-vivo model

Introducción: La obstrucción del lumen de las colleras es un evento infrecuente, pero que anula la efectividad del dispositivo en la ventilación del oído medio. Existen múltiples opciones de tratamiento tópico para esta situación clínica, sin embargo, los reportes en la literatura al respecto presentan resultados contradictorios. Objetivos: Analizar la efectividad de distintos tratamientos tópicos para destapar una collera ocluida con coágulo de sangre. Material y método: Modelo experimental ex vivo, 184 tubos de ventilación obstruidos con coágulo de sangre. Tratamiento tópico, 8 grupos experimentales (agua oxigenada 3 por ciento, ácido acético 5 por ciento, ciprofloxacino 0,3 por ciento, vinagre de mesa, heparina, mezcla de H2O2/acetato 1:1, suero fisiológico 0.9 por ciento) y 2 grupos control (sin tratamiento). Revisión de permeabilidad de lumen de colleras a los 3, 7 y 10 días. Resultados: El agua oxigenada (H2O2) resulta ser el tratamiento más efectivo (88 por ciento y 92 por ciento de efectividad a los 7 y 10 días). Ciprofloxacino, vinagre de mesa, suero fisiológico y heparina son inefectivos, sin diferencias significativas con grupo control. Ciprofloxacino y suero fisiológico sedimentan más, e incluso tapan colleras previamente permeables. Conclusiones: H2O2 es un tratamiento seguro, efectivo y económico para destapar colleras obstruidas con coágulos de sangre.

Introduction: Blocked tympanostomy tubes (TT) are an uncommon event, but avoids the effectiveness of this device in middle ear ventilation. Many topical treatment options are available for this clinical situation, however, reports in literature show conflicting results. Aim: Analyze the effectiveness of various topical treatments to open blood clot blocked TT. Material and Method: Ex vivo experimental model. 184 blood clot blocked TT. Topical treatment, 8 experimental groups (3 percent hydrogen peroxide, 5 percent acetic acid, 0,3 percent ciprofloxacin, vinegar, heparin, mixture 1:1 H2O2/acetate, 0.9 percent saline) and 2 control group (no treatment). Review of tube permeability at 3, 7 and 10 days of treatment. Results: H2O2 is the most effective treatment (88 percent & 92 percent effectiveness at 7 & 10 days). Ciprofloxacin, vinegar, saline and heparin are ineffective, with no statistical differences with control group. Ciprofloxacin and saline even blocked previously opened TT. Conclusions: H2O2 is a safe, effective and economic treatment to clear blood clot blocked TT.

Membrana do biopolímero da cana-de-açúcar: avaliação experimental na orelha média / Sugarcane biopolymer membrane: experimental evaluation in the middle ear

O desenvolvimento dos biomateriais é importante na cirurgia. O comportamento de uma nova membrana derivada da cana-de-açúcar será avaliado na orelha média do rato. OBJETIVOS: Analisar a interação da membrana do biopolímero da cana-de-açúcar na mucosa da orelha do rato. MATERIAL E MÉTODO: Estudo experimental, prospectivo e pareado com 24 ratos Wistar. A membrana do biopolímero da cana-de-açúcar foi inoculada na orelha média direita e a fáscia autóloga na orelha esquerda. Os ratos foram subdivididos em 3 grupos de 8 e sacrificados com 4, 8 e 12 semanas após a cirurgia. Foi realizada uma análise histológica da mucosa da orelha média e da membrana timpânica. RESULTADOS: Houve reação inflamatória no grupo experimental com exsudato subagudo em 50 por cento dos casos e 30 por cento exsudato crônico; 20 por cento estava normal. A inflamação foi intensa inicialmente, mas diminuiu no decorrer do tempo. No grupo controle houve apenas um caso de exsudato. Miringoesclerose na membrana timpânica foi observada em ambos os grupos. A biomembrana foi absorvida tardiamente em comparação com a fáscia. CONCLUSÕES: A membrana do biopolímero da cana-de-açúcar causou reação inflamatória na orelha média, com regressão no tempo tardio do experimento e fibrose leve. Futuros estudos podem direcionar seu uso na otorrinolaringologia.

New developments on biomaterials are important in surgery. The behavior of a new membrane produced from sugarcane will be evaluated in the middle ear of rats. AIM: This study analyzed the results from the interaction of the sugarcane-base biopolymer membrane in the middle ear of a rat. MATERIALS AND METHODS: We ran an experimental, prospective, paired study with 24 Wistar rats. The sugarcane-base polymer membrane was inoculated in the right ear; and an autologous fascia in the left ear. The rats were divided in 3 groups of 8, and slaughtered at 4, 8 and 12 weeks after surgery. Histological analyses were performed on the rats' middle ear mucosa and their tympanic membranes. RESULTS: There was an inflammatory reaction on the experimental group and middle ear subacute exudate in 50 percentof the cases; 30 percent chronic exudate; and 20 percent was normal. In the control group there was only one case of exudate. The inflammation was initially described as intense, but it decreased over time. Myringosclerosis was observed in both groups. The sugarcane biopolymer membrane was absorbed later when compared with fascia. CONCLUSION: The sugarcane biopolymer membrane induced an inflammatory reaction in the middle ear which decreased over time, and mild fibrosis. Future studies can indicate its use in otolaryngology.

Anatomia do osso temporal de ovelhas sob aspectos didáticos / Lambs' temporal bone anatomy under didactic aspects

É difícil encontrar ossos temporais humanos para o ensino de cirurgia otológica. Ossos temporais de ovelhas podem representar uma possível alternativa. MATERIAIS E MÉTODOS: Os ossos temporais de ovelhas foram dissecados em um programa convencional de dissecação de osso temporal no laboratório. Incluímos mastoidectomia, abordagens endaurais, mas também analisamos a aparência externa, o meato acústico externo e o hipotímpano. Algumas etapas são diferentes das preparações de ossos humanos. Os resultados morfométricos foram comparados à anatomia conhecida de humanos para verificar se o osso temporal de ovelhas seria utilizável para o ensino de cirurgia otológica. RESULTADOS: O osso temporal de ovelhas parece menor do que o humano. Encontramos uma área bolhosa se estendendo ao hipotímpano abaixo do meato acústico externo. A membrana timpânica é muito semelhante à humana. O meato acústico externo é menor e mais curto. A cadeia ossicular exibe analogias para com a humana. DISCUSSÃO: Esse estudo mostra que especificamente o ouvido médio, a membrana timpânica e o conduto auditivo externo são morfologicamente semelhantes às suas contrapartidas encontradas nos ossos temporais humanos. A ovelha parece ser um modelo viável para o ensino da anatomia do ouvido. A menor escala de algumas estruturas, especialmente dos componentes externos do osso temporal representa uma desvantagem. CONCLUSÕES: A ovelha parece representar uma alternativa viável no ensino de cirurgia otológica.

Human temporal bones in teaching ear surgery are rare. The lamb's temporal bone might be a possible alternative. MATERIAL AND METHODS: Temporal bones of the lamb were dissected with a typical temporal bone lab drilling program. We included a mastoidectomy, endaural approaches, but also analyzed the outer appearance, the external ear canal and the hypotympanon. Some steps differed from preparation done in humans. The morphometric results were compared to the known anatomy of human in order to verify the lambs' temporal bone for suitability in otosurgic training. RESULTS: The lambs' temporal bone appears smaller than the human one. We found a bullous extended hypotympanon located under the external ear canal. The tympanic membrane is very similar to the human one. The external ear canal is smaller and shorter. The ossicular chain shows analogies to human one. DISCUSSION: This study shows, that especially the middle ear, the tympanic membrane and the external ear canal are morphologically equal to the structures found in human temporal bones. The lamb seems feasible for teaching the anatomy of the ear. The smaller scales of some structures, especially the outer components of the temporal bone are a disadvantage. CONCLUSIONS: The lamb seems to be an alternative in teaching ear surgery.

Prótese ossicular em orelha média: o que procurar?: [revisão] / Prosthetic ossicular on middle ear: what look?: [review]

O objetivo deste trabalho foi demonstrar os achados tomográficos normais e patológicos encontrados no pós-operatório de pacientes submetidos a implantes de prótese ossicular, avaliados retrospectivamente por tomografia computadorizada. A estapedectomia com inserção de prótese é considerada o método ideal em indivíduos com fechamento da janela oval secundário a otosclerosefenestral ou causas inflamatórias. Vários tipos de prótese são utilizados, dependendo da extensãoda doença e preferência do cirurgião. Os autores, após revisão da literatura, descrevem os achadospós-operatórios considerados normais e as várias complicações inerentes ao procedimentocirúrgico, incluindo perfuração da membrana timpânica, processo inflamatório pós-operatório, necrosecom subluxação ou extrusão da prótese, desenvolvimento de granuloma/colesteatoma oufibrose periprotética, fístula perilinfática, lesão do nervo facial, dentre outras. Os achados tomográficos relacionados ao pós-operatório, bem como às complicações supracitadas, são de grande importância para o conhecimento dos radiologistas, sendo imprescindível para a propedêutica diagnóstica uma estreita correlação clínico-cirúrgica.

The aim of this essay was to demonstrate the normal and pathological CT findings of the post-operative imaging of patients underwent ossicular prosthesis implants. The stapedectomy replacedby prosthesis is considered the “gold standard” treatment of patients with oval window closure, related to otosclerosis or otherinflammatory conditions. Several types of prosthesis are availableand the choice depends on the extension of the disease or thesurgeon’s preferences. Based on extensive literature review, thenormal postoperative findings, as well as some surgery inherentcomplications were described, including among others: perforationof the tympanic membrane, necrosis associated with subluxation/extrusion of the prosthesis. granuloma/cholesteatoma or periprosthetic fibrosis, perilymphatic fistula, facial nerve damage. The knowledge of post-operative and related complications CT findings is extremely useful for head and neck radiologist, but it is essentialfor an assertive diagnoses a close clinical correlation.

Effect of ear surgery on bone conduction thresholds of patients with chronic middle ear disease

To determine the effects of surgical treatment on bone conduction thresholds in patients with chronic middle ear disease. This prospective quasi experimental study included 83 patients of chronic middle ear disease, which were surgically treated at the department of otolaryngology of a tertiary care teaching hospital in Rawalpindi, between May 2007 to May 2010. The preoperative and postoperative bone conduction thresholds were obtained one day before and six months after the surgical procedure and the data was analyzed in various ways to determine any statistical difference by applying paired t test. Statistical significance was accepted if p value is <0.05. Statistically significant deterioration in mean bone conduction thresholds was found only with radical mastoidectomy at 4000 Htz. There was no change in mean bone conduction thresholds in 68 [82%] of patients. A total of 7 [8.4%] patients showed improvement whereas 8 [9.6%] patients showed worsening of postoperative bone conduction thresholds. Mean improvement in bone conduction thresholds was 16.25 db [range 10 to 22.5 dB] whereas mean deterioration of 14.68 dB [range 10 to 30 dB] were noted. The surgical treatment of chronic middle ear disease does not affect bone conduction thresholds in majority of the patients

Cirurgia endoscópica de ouvido: dissecção da orelha média / Ear endoscopic surgery: dissection of the middle ear

Introdução: Endoscópios são equipamentos utilizados com sucesso em diversos procedimentos de várias especialidades médicas. Entretanto, na área da otologia, mesmo com a incorporação dos endoscópios em procedimentos conjuntos com microscópio, os procedimentos puramente assistidos por endoscopia ainda são muito limitados. Objetivo: Realizar dissecção endoscópica transcanal e transcanal modificada da orelha média, mostrando marcos anatômicos importantes além das estruturas que podem ser visualizadas através deste acesso. Tipo de Estudo: Prospectivo. Método: Em maio de 2009, 10 peças de ossos temporais foram dissecadas pelo mesmo cirurgião com auxílio de endoscópios. Utilizamos instrumentos de 0 e 45 graus e 4 mm, os mesmos empregados em cirurgias naso-sinusais. Resultados: Não houve dificuldades técnicas maiores na realização das dissecções. Fomos capazes de identificar várias estruturas-chave tais como a articulação incudo-maleolar, segmento timpânico do nervo facial, canal semi-circular lateral e additus ad antrum, isto sem provocar lesões em estruturas da orelha média. Conclusão: A dissecção endoscópica da orelha média pelas vias transcanal e transcanal modificada é possível e possibilita excelente visualização de estruturas importantes na orelha média. As técnicas de cirurgia de ouvido com endoscópio neste momento são semelhantes às microscópicas, porém algumas adaptações de instrumentos, novas técnicas e familiarização com estes aparelhos são fundamentais para o futuro.

Introduction: The endoscope is an equipment used successfully in several procedures of several medical specialties. However, in the otology area, even with incorporation of endoscopes in joint procedures with microscope, the procedures purely assisted by endoscopy are still very limited. Objective: Our work is aimed at carrying out transcanal and modified transcanal endoscopic dissection of the middle ear, by showing important anatomic marks, as well as the structures that may be viewed through this access. Type of Study: Prospective. Methods: In May 2009, 10 parts of temporal bones were dissected by the same surgeon with the help of endoscopes. We used instruments from 0 to 45 grads and 4 mm, the same that were applied in nasosinusal surgeries. Results: There was no major technical difficulty performing dissections. We could identify several key-structures such as incudo-malleolar articulation, tympanic segment of the facial nerve, lateral semi-circular canal and additus ad antrum, all without provoking lesions in the middle ear structures. Conclusion: The middle ear endoscopic dissection by transcanal and modified transcanal ways is possible and enables an excellent view of important structures in the middle ear. The ear surgery techniques with endoscope are currently similar to the microscopic ones, but some instrument adaptation, new techniques and familiarization with such appliances are critical for the future procedures.

Morphological aspects of tympanic bulla after ventral osteotomy in cats / Aspectos morfológicos da bulla tympanica de gatos após osteotomia ventral

PURPOSE: To evaluate tympanic bulla healing after experimental ventral osteotomy in cats. METHODS: Twenty adult cats were submitted to unilateral ventral bulla osteotomy and divided into two groups: cats of A1 group (n=10) were euthanized at 8 weeks and cats of A2 group (n=10), at 16 weeks postoperative. RESULTS: Signs of Horner's syndrome or damage to the inner ear were not found. Open-mouth radiographs taken in the immediate postoperative showed interruption in the contour of the larger compartment of the operated bulla. The result of Mcnemar'test was significant in A2 group (*p=0.0156). Macroscopic exams revealed that the operated bullae were similar to the normal ones, with preservation of the tympanic cavity. Connective tissue at the osteotomy site of the larger compartment was significantly found in the operated bullae in both groups (McNemar test: A1 p=0.0020*; A2 p=0.0078*). Histomorphometric analyses showed that the connective tissue length at the osteotomy site was shorter in A2 group than in the A1 group (Mann-Whitney test: p=0.0021*). CONCLUSIONS: Experimental ventral osteotomy did not alter significantly the tympanic bulla conformation and complete regeneration of tympanic bulla frequently did not occur before 16 weeks of postoperative period.

OBJETIVO: Avaliar a morfologia da bulla tympanica de gatos após osteotomia ventral unilateral. MÉTODOS: Foram utilizados 20 gatos distribuídos em dois grupos de 10 animais cada, de acordo com o período de observação: A1 (8 semanas) e A2 (16 semanas). RESULTADOS: Nenhum animal apresentou síndrome de Horner ou lesão do ouvido interno. Nas radiografias em projeção com a boca aberta realizadas no pós-operatório imediato observou-se a interrupção do compartimento maior da bulla tympanica operada, resultado significante no grupo A2 (McNemar, p=0,0156*). Os exames macroscópicos revelaram que a bulla tympanica operada apresentava conformação semelhante a da bulla tympanica normal, com preservação da cavidade timpânica. Na maioria das bullae tympanicae operadas observou-se a presença de tecido conjuntivo na área de osteotomia. O resultado do teste de McNemar foi significante em ambos os grupos (A1, p=0,0020*; A2, p=0,0078*). Os exames histomorfométricos demonstraram que a extensão de tecido conjuntivo presente no local da osteotomia do compartimento maior era menor nas bullae tympanicae operadas do grupo A2 (Mann-Whitney, p=0,0021*). CONCLUSÕES: A osteotomia ventral não alterou de maneira significativa a conformação da bulla tympanica. A regeneração total da bulla tympanica geralmente não ocorreu antes de 16 semanas de pós-operatório.