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Results for “Ear, External”

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At least 55 records · Page 3Linked to original sources
PubMed1989

External ear resonance characteristics in children.

External ear resonance characteristics were determined for 78 children ages 3-13 using an ear canal probe tube microphone system. The average peak resonant frequency was 2848 Hz (range: 1774-4039), and the average measured gain at the eardrum was 18.9 dB (range: 11.5-26.7). Correlations of average peak resonant frequency and peak resonant amplitudes with age, height, weight, head circumference, and/or canal opening area were poor. These values are very similar to the adult data reported by Shaw (1974). Slight deviations can be attributed, in part, to the different sound field calibration methods used.

Acoustics↗
PubMed1995

External ear canal cholesteatoma. Case report.

External ear canal cholesteatoma is a rare condition in otologic practice. A case in a 43-year-old woman is presented in which despite the extensive nature of the lesion, minimal symptoms and absence of signs delayed diagnosis. The cause of the lesion and its treatment are discussed.

Adult↗
PubMed1982

Effect of diving and diving hoods on the bacterial flora of the external ear canal and skin.

The bacterial flora of the external ear canals and posterior auricular skin surfaces were investigated in a group of 26 divers after 25 dry-suit dives in harbor water and 20 dry-suit dives in clear test tank test. A control group of 16 divers wore rubber hoods 19 times for a similar period (25 to 30 min) but did not dive. The protective effect of 2% acetic acid was tested by instilling it in the left ear of 14 divers and 8 nondivers. Staphylococcus epidermidis, Propionibacterium acnes, alpha-hemolytic streptococci, and enteric gram-negative rods were the predominant isolates from skin and ear samples. After the divers dove or after they wore hoods without going in the water, there was a substantial increase in the number of these organisms on the skin (46.9%) or in the external ears (43.8%) of the divers. However, an increase in the bacterial counts in the external ear canals occurred in only 13.6% of the individuals treated prophylactically with acetic acid drops. Although no gram-negative rods were recovered from the skin or external ear canals of divers in clear tank water, 23 strains were isolated after the dives in harbor water. Identical gram-negative isolates also were recovered from the harbor water. Gram-negative organisms also were recovered from three newly acquired skin lacerations, where they persisted for at least 24 h. Our data show the acquisition of gram-negative rods when dives were made in polluted water. The data also demonstrate the increase in bacterial counts that occurs when rubber diving rods are worn (in or out of water) and that this increase can be controlled by pretreatment of ears with acetic acid.

Acetates↗
PubMed2003

Closing surgical defects of the external ear.

Closing surgical defects of the external ear poses unique challenges because of the convoluted shape and thin tethered skin. Choice of repair is often dictated by the site of the wound. If the defect is central and anterior with intact cartilage, most defects will do well by second intention healing or grafting. If the defect involves the helical rim, reconstruction is often preferred to maintain the normal curvature of the external ear and a helical rim advancement flap with trimming of the central cartilage is often used. Defects of the posterior ear where the skin is more abundant and loose can often be closed side to side. Split earlobes may be repaired by Z-plasty. The full range of repair options should be considered in every case. Because each ear differs in shape and flexibility, creativity is warranted, rewarding both the patient and the surgeon.

Ear, External↗
PubMed1991

External ear reconstruction.

Plastic reconstruction of the external ear designed to achieve a near-natural shape is now a practical proposition even though only few clinical centres can afford to perform it. The present communication is based on experience in the practical application of this new otoplastic technique in 28 patients aged 7 to 25 years. The method involves the making of an auricular structure on a flat cartilaginous groundwork on which to form the helix, anthelix as well as the concha situated in the horizontal, vertical and saggital planes in the shape of two successive steps similarly as in the cartilage of a normal external ear. The proposed technique eliminates the need to excise the block of cartilage from two ribs, and for that reason is less traumatizing and better suited for going ahead with the otoplasty in children of younger age (7-8 years). Given the present rate of incidence of auricular deformity and incomplete development of facial bones and jaws, osteoplasty precedes otoplasty.

Adolescent↗
PubMed1997

Anatomy and orientation of the human external ear.

A knowledge of the external ear and tympanic membrane is essential to practicing audiologists. This article provides an introduction to the anatomy of this area including dimensions, orientation, vasculature, innervation, and relations to other structures. Traditional diagrams are often inadequate in describing these structures. For example, typical frontal and sagittal views of the external auditory meatus do not adequately describe its anteroposterior course. Axial (transverse) views provide easier visualization of these areas. A nomenclature is also provided for areas and angles of the external auditory meatus.

Carotid Artery, External↗
PubMed1993

[Innervation of the external ear in humans and the musk shrew].

The external ear appears only in mammals and possesses a great diversity of forms. In addition, multiple nerves are distributed in the external ear. The nerves which are distributed in the external ear were investigated in humans and in the musk shrew (Suncus murinus) in a macroscopic study. The following results were obtained. Cranial nerves (CN) V, VII, X and cervical nerves supply the auricle and the external meatus in both humans and the musk shrew. Branches of the third division of CN V supply an anterior part of the external meatus and the anterior part of the auricle in both humans and the musk shrew. A branch of CN X, together with a branch of CN VII, supply the posterior parts of the external meatus in humans. In the musk shrew, a branch of CN X, together with a branch of CN VII, supplies the posterior part of the external meatus and the central part and the anterior portion of the auricle. Branches of the cervical nerve supply the posterior part of the auricle. Branches of the cervical nerve supply the posterior part of the external meatus and the central and posterior parts of the auricle in the musk shrew.

Aged↗