TAILIEUCHUNG - Cochlear Implants: Fundamentals and Application - part 8

Một sứ giả lớn tĩnh mạch có thể gây chảy máu nhanh, và một tế bào không khí kém hơn so với ốc tai có thể bị nhầm lẫn với cửa sổ tròn. Bằng cách so sánh hình ảnh từ hai bên, nó có thể phát hiện chất lỏng trong hệ thống tế bào không khí hoặc xói mòn bệnh lý của meatus nội bộ. | Special Investigations 571 Figure . A coronal CT section of the cochlea and temporal bone demonstrating A the basal turn of the cochlea B the tympanum C the horizontal part of the facial nerve D the jugular bulb and E the mastoid air cells. A large emissary vein can cause brisk bleeding and an air cell inferior to the cochlea could be mistaken for the round window. By comparing the image from the two sides it is possible to detect fluid within the air cell system or pathological erosion of the internal meatus. In meningitis the most common cause of acquired total deafness the inflammatory changes may extend throughout the basal but also the middle and apical turns. There is frequently ossification from the round window for up to 6 mm along the scala tympani. These changes can usually be detected by CT scans. Labyrinthitis ossificans can extend to total obliteration of the cochlear duct by patchy or uniformly opaque bone. Some cases have fibrous material obliterating the cochlea with the result that the CT scans appear to indicate implantable ears whereas at surgery the scala tympani is filled with scar tissue that adheres to the bone and basilar membrane along the spiral. In cases of meningitis examine not only the clarity of the basal turn but also the upper turns as opacification would suggest the presence of fibrous tissue. Magnetic resonance imaging MRI is essential in excluding fibrous tissue in the cochlea. There are a variety of changes in ears affected by otosclerosis Damsma et al 1984 Mafee et al 1985 . The otospongiosis reduces the opacity of the otic capsule and increases the diameter of the cochlear duct. In addition there are bony accumulations at the round and oval windows. The changes seen as a result of these 572 9. Preoperative Selection processes include obliteration of the round window roughened walls of the cochlear spaces mottling of the otic capsule producing a double-barrel appearance and sometimes widening of the cochlear perilymph .

• Y học thường thức
• Auditory Prostheses
• Auditory Prosthesis
• Cochlear Implantation
• Bilateral Cochlear Implants
• Vestibular Implants
• Electric Hearing
• Cochlear
• Implant
• Cila Umat
• Rinze Anthony Tange
• Health
• Sciences
• medicine
• pharmacolocy
• báo cáo khoa học
• báo cáo hóa học
• công trình nghiên cứu về hóa học
• tài liệu về hóa học
• cách trình bày báo cáo
• báo cáo y học
• công trình nghiên cứu về y học
• tài liệu về y học
• An introduction to the physiology of hearing
• The auditory cortex
• The centrifugal pathways
• Sensorineural hearing loss
• Physiological aspects of the cochlear prosthesis
• Sound localization and spatial hearing
• Neck surgery
• Ballenger’s otorhinolaryngology head
• Vestibular systems
• Gene therapy
• Hair cell regeneration
• Cochlear biophysics
• BMC Pulmonary Medicine
• Granulomatosis with polyangitis
• Pulmonary fibrosis
• Mycobacterium abscessus
• Sporadic lung disease
• Cystic fibrosis