Diseases of external ear dr t balasubramanian drtbalus otolaryngology online 2. Management and surgery gert ter haar, dvm, decvs department of clinical sciences of companion animals faculty of veterinary medicine po box 80 154 3508 td utrecht the netherlands g. Infections of the external ear yk ong, 1mrcs, m med orl, g chee,mbbs, frcs abstract otitis externa is one of the most common conditions seen in the otolaryngology practice. Acute external otitis one of the most common diseases to affect the ear is known as external otitis, more commonly thought of or discussed by laymen as swimmers ear. The external ear is composed of the auricle pinna and the external auditory canal. Dec 01, 2018 orphanet is a european reference portal for information on rare diseases and orphan drugs.
From the external auditory meatus deep auricular branch of the maxillary artery. Perforations of the tympanic membrane the tympanic membrane eardrum, the delicate sheet of tissue that separates the external ear from the middle ear, can become damaged due to trauma or chronic infection. Aug 01, 2016 ent 3d ear 2 diseases of external ear. Diseases of ear, nose and throat the present edition is revised, updated and expanded. The ear also has a soundreceiving function and a location that is both visible and aesthetically obvious, thereby drawing considerable attention from the patient. Clinical features, diagnostic techniques and therapy are outlined for each disease. External auditory canal disordersroland and marple. Otologic surgery generally refers to surgery of the middle ear and mastoid related to chronic otitis media.
Auricle pinna auricle is composed of thin plate of elastic cartilage covered by layer of skin. Impaired hearing is, with rare exception, the result of disease or abnormality of the outer, middle, or inner ear. Treatment is with topical drugs, including antibiotics, corticosteroids and acetic acid or a combination. Head and neck surgery english 6th edition paperback shruti dhingra and p. Wisselink summary six groups offeline and canine skin diseases sharing the involvement of the external ear are discussed.
Both contain elastic cartilage derived from mesoderm and a small amount of subcutaneous tissue, covered by skin with its adnexal appendages 1, 2. Pubmed is a searchable database of medical literature and lists journal articles that discuss conductive deafness with malformed external ear. Mri introduction pathology of the external and middle ear is the third most common reason of visiting a general practitioner or a family doctor 1, 2. Dermatologic diseases of the external ear sciencedirect.
Head and neck surgery is a comprehensive book for the undergraduate medical students and those preparing for entrance examinations for admissions to postgraduate medical courses. External otitis swimmers ear external otitis is an infection of the ear canal, typically by bacteria. The external ear includes the auricle and auditory canal fig. Diseases of the external ear and pinna request pdf. Helpful hints in diagnosing common middle and external ear. Essential oils and some of their components applied into the external ear canal are effective as treatment of experimental acute otitis media caused by s. Ear diseasesmicrobiology ear diseasesphysiopathology ear diseasestherapy. A cursory look at the subject index discloses some 420 items, from abscesses to zinc stearate. The ear, nose and throat ent specialists at aurora are trained to take care of all your ear needs and get you back to feeling your best. Diseases of the external ear acute external otitis one of the most common diseases to affect the ear is known as external otitis, more commonly thought of or discussed by laymen as swimmers ear. External otitis is an inflammatory process or infection of the superficial layers of the outer ear canal. Dhingra diseases of ear, nose and throat pdf 7th edition.
The external ear in skin diseases of dogs and cats. In 1957 he wrote a classic monograph on the subject, which gradually was replaced by more thorough and extensive textbooks. Orphanet is a european reference portal for information on rare diseases and orphan drugs. The external ear is composed of the auricle and external auditory canal eac. In children and teenagers, inflammatory conditions of the middle ear are the most frequent reasons to prescribe antibiotics and perform. This information refers to the general prevalence and incidence of these diseases, not to how likely they are to be the actual cause of external ear infections. Here, we present an overview of the anomalies of the external ear. While the ear is one part of your body, its divided into three separate units. The pinna is innervated laterally, inferiorly, and posteriorly by the great auricular nerve cervical plexus. External ear disease diagnosis four conditions of the external ear including external otitis, canal and tympanic membrane trauma, and impacted cerumen are covered in this section. Some questions you should be able to answer by the end of this lecture.
The pinnae of the external ear are cartilaginous frames that aid in focusing and localizing sound. Postero superior wall is shorter than antero inferior wall. Education and information about swimmers ear otitis externa and its relation to hygiene, including healthy water, drinking water, swimming recreational water, recreational water illnesses, diseases related to water, global water, safe water for sanitation and hygiene, other uses of water, and how to make water safe to drink in emergencies for outbreaks, preparedness, and response. An ear infection sometimes called acute otitis media is an infection of the middle ear, the airfilled space behind the eardrum that contains the tiny vibrating bones of the ear.
Since space limitations preclude an exhaustive treatment of any single area, we hope that this catalogue will serve both as a reminder of the dimensions of the range of auricular malignant diseases for the clinician, and as an initiator of ideas for investigators in this. Diseases of pinna auricle with pictures and complete explaination duration. Because ear infections often clear up on their own, treatment may begin with managing pain and monitoring. External otitis the ear canal is subject to all afflictions of skin, one of the most common of which is infection. Logan turners diseases of the nose throat and ear pdf 11th. Each part may have its own concerns and require special treatment. Exostosis of the external auditory canal also known as surfers ear, is an abnormal bone growth within the ear canal. The middle ear houses three ossicles, the malleus, incus and stapes and is connected to the back of. It encompasses a wide range of conditions, from those that cause mild inflammation and discomfort to those that are lifethreatening. Diseases of external ear dr t balasubramanian drtbalus otolaryngology online.
Congenital anomalies of the external ear sciencedirect. Click on the link to view a sample search on this topic. The external portion of the ear canal is a cartilage tube lined with skin, hair and glands. Treatment is with topical drugs, including antibiotics, corticosteroids and acetic acid or. The skin is delicate, readily abraded and thus easily inflamed. Dermatologic diseases on the external ear are seen in a variety of medical disciplines. The external ear, namely, the auricle and the external auditory canal, is composed of skin, cartilage, and all associated appendages. Although audiologists will not necessarily treat these conditions, it is important for them to be aware of these disorders and refer patients to a specialist in some instances. First published over 100 years ago, logan turners diseases of the nose, throat and ear.
How common are these causes of external ear infections. Oct 01, 2018 the external ear, namely, the auricle and the external auditory canal, is composed of skin, cartilage, and all associated appendages. The pinna and external auditory canal form the outer ear, which is separated from the middle ear by the tympanic membrane. Hygienerelated diseases hygienerelated diseases hygiene. Ear infection middle ear symptoms and causes mayo clinic. External ear is composed of auricle and external auditory canal meatus. Management involves recognizing the benefits and limitations of therapy, which should be thoroughly discussed with the parents and, when appropriate, the patient. Arnolds nerve a branch of the vagus nerve innervates the inferior bony canal, the posterosuperior cartilaginous canal, and corresponding segments of the tympanic membrane and the cymba concha. Serious impairment of hearing at birth almost always results from a dysfunction of the auditory. Ear, external microbiology ear, external physiopathology humans. The skin and cartilage of the ear are subject to the same insults as similar tissues found elsewhere in the body. Dermatologists, otorhinolaryngologists, general practitioners, and general and plastic surgeons are regularly consulted regarding cutaneous lesions on the ear. Tumours of the external ear and temporal bone the lancet. Common ear diseases brochure starkey for hearing care.
Ear, externalmicrobiology ear, externalphysiopathology humans. Ear diseases microbiology ear diseases physiopathology ear diseases therapy. Now, at age 70, he and some friends recapitulate for us in a manual designed for all physicians involved in the treatment of external ear diseases. Conductive deafness with malformed external ear genetic and. Dermatologists, otorhinolaryngologists, family practitioners, and general and plastic surgeons are regularly consulted about cutaneous lesions on the ear. Logas and others published diseases of the external ear and pinna find, read and cite all the research you need on researchgate. Effective treatment of experimental acute otitis media by. In this booklet, well identify a few of the most common ones so you can proactively stay on top of your hearing health and take steps to prevent hearing loss. Their antimicrobial spectrum indicates that they may also be effective in the treatment of acute otitis media caused by other organisms.
Several new clinical photographs, diagrams, tables and fl owcharts have been added to make the subject clear. The funnel like curves of auricle collects sound wave and direct them to middle ear. Conductive hearing losshearing loss caused by diseases found in the external or middle. It is brought about by exposure to cold wind and water combined, producing a supercooling of the ear canal. The inside of this external canal is dark and moist. Of the 4 causes of external ear infections that we have listed, we have the following prevalenceincidence information. The anterior and posterior surfaces of the auricle are characterized by a typical relief fig. Pdf pathology of the external and middle ear is the most frequent reason to prescribe antibiotics and perform surgery in children and young adults. The deepest depression called concha which is partly covered by two small projection. External auditory canal disordersroland and marple disorders of known etiology atresia and malformation of the external auditory canal the pinna, external auditory canal, middle ear, and inner ear can experience disruption of their embryologic development either separately or together. Children are more likely than adults to get ear infections.
External otitis pertains to all the inflammatory processes that change the continuity of the epithelium of the external auditory canal, meatus, and. But how high is evidenced only by taking up a book like senturias, in which we find some 340 names of authors who have written articles dealing with the external ear. The gamut runs from injuries, through tumors, diseases, and malformations. Ventilation tubes may reverse the process and restore normal middle ear function. Ear disease, any of the diseases or disorders that affect the human ear and hearing. Diseases of the external ear canal, middle and inner earby g. External auditory atresia is usually unilateral, right more than left, although can be bilateral. Common ear diseases better hearing philippines inc. Untreated, this leaves the delicate middle ear vulnerable to infection and can produce hearing loss. Dermatologic diseases of the external ear are seen in a variety of medical disciplines. Seborrheic dermatitis of the external ear can be treated with medicated shampoo used for the scalp. He learned all there is to know about the external ear. In this case, the central portion of the drum is seen to be retracting medially due to the negative pressure in the middle ear space. It is not a straight tube drtbalus otolaryngology online.918 320 584 50 442 1063 867 1381 867 257 1031 1122 1611 1428 224 240 528 1025 626 1143 878 1199 288 1551 900 1037 490 1326 753 1461 353 1294 1390 361 362 1356 816 423 1399 1036 740 799 713 772 998 477