Ticks were extracted from ear canal of 318 cases in Hospital Tengku Ampuan Afzan,Kuantan,Pahang over a 5-year period(January 2002 to December 2006).A total of 329 ticks were recorded and a majority belonged to the gen...Ticks were extracted from ear canal of 318 cases in Hospital Tengku Ampuan Afzan,Kuantan,Pahang over a 5-year period(January 2002 to December 2006).A total of 329 ticks were recorded and a majority belonged to the genus Dermacentor(99.7%).The genus was represented by Dermacentor atrosignatus,Dermacentor compactus and Dermacentor steini.A single tick of the genus Haemaphysalis was found.All active stages(larvae, nymphs and adults) were present.The nymphal stages were most frequently encountered(82.4%).Usually, there was only one tick per case.However,there were 7 cases where 2 or 3 ticks were extracted from a single ear canal.Throughout the study,there were 6 repeat cases.Average body engorgement indices for detached larvae,nymph,male and female ticks were 1.04,1.24,1.32 and 1.31,respectively.Based on these indices,duration of attachment was then predicted.Attachment for most nymphal(99.6%) and all adult ticks were less than 24 hours.Only 1 nymphal tick attached for a 60 hours’duration.Ticks were commonly found in the bony part of ear auditory canal(47.3%),followed by tympanic membrane(29.1%) and cartilage part of ear auditory canal(22.0%);a small percent was attached to the pinna(1.6%).All ticks were alive before extraction.However,most attached ticks were found dead(71.7%) after extraction.Majority of the ticks were intact(90.3%) while others were either in a bad condition(3.6%) or broken(6.1%).Those alive were either unfed or at early stage of feeding.Generally,removal of ticks did not result in any complication (61.4%) to the cases.The most common complication was bleeding(27.6%),followed by haematoma of external auditory canal(5.5%),haematoma of tympanic membrane(3.1%) and perforated tympanic membrane (1.6%).Bleeding was a common complication at the site of skin abrasion due to the strong grip of ticks ’mouthparts that were deeply embedded into the skin of cases.In this study,32.5%of removal ticks had remnants of case tissues attached to the ticks’mouthparts.展开更多
Using the three-dimensional reticular nickel foam as experimental material, the sound absorption performance was investigated for several various multilayer structures in the frequency range of 2000-4000 Hz, which is ...Using the three-dimensional reticular nickel foam as experimental material, the sound absorption performance was investigated for several various multilayer structures in the frequency range of 2000-4000 Hz, which is aurally sensitive for human ears. The results showed that the 7.5 mm-thick foam sample, which was formed by piling of 5-layer foam plate（thickness： 1.5 mm; porosity： 96%; average pore-diameter： 0.65 mm） could exhibit an excellent sound absorption effect at 4000 Hz, with the absorption coefficient about 0.8. Constituting alternate air gap with the total thickness of about 18.5 mm can greatly improve the absorption performance at relatively low frequencies of 2000-3150 Hz, with the absorption coefficient up to about 0.5 or more. In addition, the research showed that alternate piling up the perforated plate inside the foam plates can also achieve a quite good effect of sound absorption at relatively low frequencies.展开更多
Aural polyps are a common clinical entity encountered by otorhinolaryngologist in daily practice. Polyps are frequently seen in paediatric patients, usually inflammatory in nature. In children rhabdomyosarcomas (RMS) ...Aural polyps are a common clinical entity encountered by otorhinolaryngologist in daily practice. Polyps are frequently seen in paediatric patients, usually inflammatory in nature. In children rhabdomyosarcomas (RMS) can mimic all the cinical features of chronic suppurative otitis media which usually present as external auditory canal mass or polyp. Here we present a case where a male child presented with recurrence of polyp in left ear which was finally diagnosed as embryonal rhabdomyosarcoma which is a rare and invariably fatal disease in children. Through this article we intend to highlight the failures and delay committed in attaining diagnosis in this patient in spite of multispecialty evaluation involving repeated imaging and histopathological correlation. Our experience with embryonal rhabdomyosarcoma throws light on the high vigilance required in handling the aural polyps in pediatric population as early diagnosis and treatment are the key elements for successful outcomes.展开更多
Managing microtia patients is always a challenge. Multidisciplinary approach, good family support, well established doctorepatient rela-tionship and well organised patient-support groups are the essential elements for...Managing microtia patients is always a challenge. Multidisciplinary approach, good family support, well established doctorepatient rela-tionship and well organised patient-support groups are the essential elements for success. With the advancement of implantable hearing devices, more options will be available for the microtia patients. Otologists play a leading role in the whole management process. They not only provide proper guidance to the patients in choosing the correct path of the treatment, but also play a key role in organising and maintaining a cost-effective multidisciplinary rehabilitation team for the microtia patients.展开更多
A hemispherical array of 196 independent loudspeakers has been constructed for laboratory research on spatial hearing, auralization, sound-field quality and spatial audio signal processing. The array of small loudspea...A hemispherical array of 196 independent loudspeakers has been constructed for laboratory research on spatial hearing, auralization, sound-field quality and spatial audio signal processing. The array of small loudspeakers is supported by a geodesic frame with a radius is 2.4 m. With this relatively high spatial density of sound sources, spatially quantized rendering of sound fields should be viable for a variety of applications, and this paper considers the potential and limits of this approach in relation to human spatial hearing capacities. The paper also considers the combined use of multiple loudspeakers for the rendering low-frequency components of sound sources in order to extend the low-frequency response of the system.展开更多
Aural atresia is a rare congenital malformation of the external and middle ear. There are several syndromic associations of this anomaly with those involving the first and second branchial arches. Occurrence of aural ...Aural atresia is a rare congenital malformation of the external and middle ear. There are several syndromic associations of this anomaly with those involving the first and second branchial arches. Occurrence of aural atresia with sclerosing skeletal dysplasia is unknown and has never been reported. The coexistence of a sclerosing dysplasia can make the surgical treatment in aural atresia difficult and risky; and the auditory improvement may not be as expected. Moreover, internal auditory canal narrowing and hence sensorineural hearing loss in sclerosing dysplasia might add to the already existing conductive hearing loss in such patients. In this case report we have described an unknown association of bilateral microtia with sclerosing skeletal dysplasia(autosomal dominant osteopetrosis) and clinical implications of these two conditions occurring together leading to a change in the management plan.展开更多
Listening comprehension,a long-neglected area in English language teaching,was not taught as a separate course in our schools until the early 1980s.“Yet ithas been estimated that of the time adults spend in communica...Listening comprehension,a long-neglected area in English language teaching,was not taught as a separate course in our schools until the early 1980s.“Yet ithas been estimated that of the time adults spend in communication activities 45per cent is devoted to listening,only 30 per cent to speaking,16 per cent to read-ing,and a mere 9 per cent to writing.”Listening can and ought to be taughtapart from speaking;it has its peculiar problems.There’s just as much activity展开更多
A case of aural vertigo in the Third Affiliated Hospital of Inner Mongolia Medical University was collected. The diagnosis and treatment of the disease were analyzed by experts, and a variety of causes of the disease ...A case of aural vertigo in the Third Affiliated Hospital of Inner Mongolia Medical University was collected. The diagnosis and treatment of the disease were analyzed by experts, and a variety of causes of the disease were discussed, in order to achieve personalized treatment and satisfactory curative effect.展开更多
Congenital aural atresia is characterized by aplasia of the external auditory canal (EAC), often associated with abnormalities of the auricula (microtia), the middle ear, and, occasionally, the inner ear structures. T...Congenital aural atresia is characterized by aplasia of the external auditory canal (EAC), often associated with abnormalities of the auricula (microtia), the middle ear, and, occasionally, the inner ear structures. The aim of this study is to evaluate the surgical challenges, complications and long term results of congenital aural atresia(CAA) surgery. Records of 103 patients who underwent surgery because of congenital aural atresia were reviewed between 1992 and 2012 in a tertiary referral center. Audiological and surgical events were observed. Surgical technique, incision type, graft material and long term results were noted. Postoperative visit records and audiograms were investigated. Many types of ossicular chain abnormalities such as absence of an ossicle, deformity of an ossicle or ossicular block were observed. Facial canal dehiscence or abnormal location of the facial nerve was seen in 33.9% of patients. Closure of the air-bone gap (ABG) to 30 dB or less at short-term follow-up occurred in 63.1% of patients. Major complications were as follows: restenosis of the external ear canal, hearing loss, facial paralysis, iatrogenic cholesteatoma and perforation of the graft. The air-bone gap cannot be totally closed in all aural atresias, and there is also the chance of sensorineural type hearing loss. Success of the surgery depends on accompanying abnormalities like unexpected route or dehiscence of facial nerve, status of the ossicular chain and middle ear cleft and surgical techniques. Long term results of congenital aural atresia surgery are encouraging and promising.展开更多
基金supported by a grant(Code:04- 002)from the Ministry of Health,Malaysia
文摘Ticks were extracted from ear canal of 318 cases in Hospital Tengku Ampuan Afzan,Kuantan,Pahang over a 5-year period(January 2002 to December 2006).A total of 329 ticks were recorded and a majority belonged to the genus Dermacentor(99.7%).The genus was represented by Dermacentor atrosignatus,Dermacentor compactus and Dermacentor steini.A single tick of the genus Haemaphysalis was found.All active stages(larvae, nymphs and adults) were present.The nymphal stages were most frequently encountered(82.4%).Usually, there was only one tick per case.However,there were 7 cases where 2 or 3 ticks were extracted from a single ear canal.Throughout the study,there were 6 repeat cases.Average body engorgement indices for detached larvae,nymph,male and female ticks were 1.04,1.24,1.32 and 1.31,respectively.Based on these indices,duration of attachment was then predicted.Attachment for most nymphal(99.6%) and all adult ticks were less than 24 hours.Only 1 nymphal tick attached for a 60 hours’duration.Ticks were commonly found in the bony part of ear auditory canal(47.3%),followed by tympanic membrane(29.1%) and cartilage part of ear auditory canal(22.0%);a small percent was attached to the pinna(1.6%).All ticks were alive before extraction.However,most attached ticks were found dead(71.7%) after extraction.Majority of the ticks were intact(90.3%) while others were either in a bad condition(3.6%) or broken(6.1%).Those alive were either unfed or at early stage of feeding.Generally,removal of ticks did not result in any complication (61.4%) to the cases.The most common complication was bleeding(27.6%),followed by haematoma of external auditory canal(5.5%),haematoma of tympanic membrane(3.1%) and perforated tympanic membrane (1.6%).Bleeding was a common complication at the site of skin abrasion due to the strong grip of ticks ’mouthparts that were deeply embedded into the skin of cases.In this study,32.5%of removal ticks had remnants of case tissues attached to the ticks’mouthparts.
基金Project(C16) supported by the Testing Foundation of Beijing Normal University,China
文摘Using the three-dimensional reticular nickel foam as experimental material, the sound absorption performance was investigated for several various multilayer structures in the frequency range of 2000-4000 Hz, which is aurally sensitive for human ears. The results showed that the 7.5 mm-thick foam sample, which was formed by piling of 5-layer foam plate（thickness： 1.5 mm; porosity： 96%; average pore-diameter： 0.65 mm） could exhibit an excellent sound absorption effect at 4000 Hz, with the absorption coefficient about 0.8. Constituting alternate air gap with the total thickness of about 18.5 mm can greatly improve the absorption performance at relatively low frequencies of 2000-3150 Hz, with the absorption coefficient up to about 0.5 or more. In addition, the research showed that alternate piling up the perforated plate inside the foam plates can also achieve a quite good effect of sound absorption at relatively low frequencies.
文摘Aural polyps are a common clinical entity encountered by otorhinolaryngologist in daily practice. Polyps are frequently seen in paediatric patients, usually inflammatory in nature. In children rhabdomyosarcomas (RMS) can mimic all the cinical features of chronic suppurative otitis media which usually present as external auditory canal mass or polyp. Here we present a case where a male child presented with recurrence of polyp in left ear which was finally diagnosed as embryonal rhabdomyosarcoma which is a rare and invariably fatal disease in children. Through this article we intend to highlight the failures and delay committed in attaining diagnosis in this patient in spite of multispecialty evaluation involving repeated imaging and histopathological correlation. Our experience with embryonal rhabdomyosarcoma throws light on the high vigilance required in handling the aural polyps in pediatric population as early diagnosis and treatment are the key elements for successful outcomes.
文摘Managing microtia patients is always a challenge. Multidisciplinary approach, good family support, well established doctorepatient rela-tionship and well organised patient-support groups are the essential elements for success. With the advancement of implantable hearing devices, more options will be available for the microtia patients. Otologists play a leading role in the whole management process. They not only provide proper guidance to the patients in choosing the correct path of the treatment, but also play a key role in organising and maintaining a cost-effective multidisciplinary rehabilitation team for the microtia patients.
文摘A hemispherical array of 196 independent loudspeakers has been constructed for laboratory research on spatial hearing, auralization, sound-field quality and spatial audio signal processing. The array of small loudspeakers is supported by a geodesic frame with a radius is 2.4 m. With this relatively high spatial density of sound sources, spatially quantized rendering of sound fields should be viable for a variety of applications, and this paper considers the potential and limits of this approach in relation to human spatial hearing capacities. The paper also considers the combined use of multiple loudspeakers for the rendering low-frequency components of sound sources in order to extend the low-frequency response of the system.
文摘Aural atresia is a rare congenital malformation of the external and middle ear. There are several syndromic associations of this anomaly with those involving the first and second branchial arches. Occurrence of aural atresia with sclerosing skeletal dysplasia is unknown and has never been reported. The coexistence of a sclerosing dysplasia can make the surgical treatment in aural atresia difficult and risky; and the auditory improvement may not be as expected. Moreover, internal auditory canal narrowing and hence sensorineural hearing loss in sclerosing dysplasia might add to the already existing conductive hearing loss in such patients. In this case report we have described an unknown association of bilateral microtia with sclerosing skeletal dysplasia(autosomal dominant osteopetrosis) and clinical implications of these two conditions occurring together leading to a change in the management plan.
文摘Listening comprehension,a long-neglected area in English language teaching,was not taught as a separate course in our schools until the early 1980s.“Yet ithas been estimated that of the time adults spend in communication activities 45per cent is devoted to listening,only 30 per cent to speaking,16 per cent to read-ing,and a mere 9 per cent to writing.”Listening can and ought to be taughtapart from speaking;it has its peculiar problems.There’s just as much activity
文摘A case of aural vertigo in the Third Affiliated Hospital of Inner Mongolia Medical University was collected. The diagnosis and treatment of the disease were analyzed by experts, and a variety of causes of the disease were discussed, in order to achieve personalized treatment and satisfactory curative effect.
文摘Congenital aural atresia is characterized by aplasia of the external auditory canal (EAC), often associated with abnormalities of the auricula (microtia), the middle ear, and, occasionally, the inner ear structures. The aim of this study is to evaluate the surgical challenges, complications and long term results of congenital aural atresia(CAA) surgery. Records of 103 patients who underwent surgery because of congenital aural atresia were reviewed between 1992 and 2012 in a tertiary referral center. Audiological and surgical events were observed. Surgical technique, incision type, graft material and long term results were noted. Postoperative visit records and audiograms were investigated. Many types of ossicular chain abnormalities such as absence of an ossicle, deformity of an ossicle or ossicular block were observed. Facial canal dehiscence or abnormal location of the facial nerve was seen in 33.9% of patients. Closure of the air-bone gap (ABG) to 30 dB or less at short-term follow-up occurred in 63.1% of patients. Major complications were as follows: restenosis of the external ear canal, hearing loss, facial paralysis, iatrogenic cholesteatoma and perforation of the graft. The air-bone gap cannot be totally closed in all aural atresias, and there is also the chance of sensorineural type hearing loss. Success of the surgery depends on accompanying abnormalities like unexpected route or dehiscence of facial nerve, status of the ossicular chain and middle ear cleft and surgical techniques. Long term results of congenital aural atresia surgery are encouraging and promising.
