Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Ear, External”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 181 records · Page 10Linked to original sources
PubMed1994

External ear reconstruction. Use of a pivoting helix, porous polyethylene implant.

We have used the porous polyethylene, pivoting helix framework for ear reconstruction at RLAMC since 1989 with no major complications. Postoperatively, patients have an external ear that resembles a normal ear and is sturdy enough to support eye wear. The aesthetic results have been well received by the patients and their families (Fig 8). Most children are reluctant to undergo surgery; however, those patients with ear deformities often are eager for external ear reconstruction surgery, and the majority of our pediatric patients have been pleased with the postoperative results (Fig 9). The success of this procedure depends on a number of factors, including proper patient selection, suitable selection of materials for the reconstruction, the technical skills of the surgeon, and the surgical team's attention to detail in the intraoperative period. The perioperative nurse, functioning as the patient advocate, plays an integral role in the success or failure of this procedure.

Burns↗
PubMed1988

The histological effects on the guinea pig external ear of several constituents of commonly used aural preparations.

Medicament contact dermatitis can be troublesome in external ear disease. In this work the effects on the guinea pig external ear of instillation twice daily for 3 weeks of benzalkonium chloride, Cerumol, gentamicin, the pharmaceutical base for Gentisone HC, hydrocortisone and propylene glycol were studied using light microscopy, thickness measurements of tympanic membrane and meatal epidermis, and the mitotic index of meatal epidermis. Benzalkonium chloride induced severe inflammatory changes and markedly increased the thickness measurements and meatal mitotic index. Cerumol also increased the thickness measurements and the mitotic index; there was additionally low grade chronic inflammation in the dermis. Prophylene glycol increased the mitotic index and thickness measurements though no signs of inflammation were seen. Other compounds did not produce significant changes except that hydrocortisone reduced the mitotic index. Contact dermatitis to benzalkonium chloride may be important in persistent ear disease. Cerumenolytic agents ought not to be used for prolonged periods or as prophylaxis.

Animals↗
PubMed1982

Echolocation in bats: the external ear and perception of the vertical positions of targets.

Echolocating bats (Eptesicus fuscus) can perceive changes of as little as 3 degrees of arc in the vertical angles separating pairs of horizontal rods. This acuity depends upon modification of sounds entering the external ear canal by the structures of the external ear. Deflection of the tragus degrades the acuity of vertical-angle perception from 3 degrees to about 12 degrees to 14 degrees. The pinna-tragus structure produces a strong secondary echo of sounds entering the external ear canal, and the delay of this echo after the time when the sound directly enters the ear canal apparently encodes the vertical direction of a sound source.

Animals↗
PubMed1977

Hereditary deafness associated with branchial fistulae and external ear malformations.

Two families are presented in which affected members had deafness, preauricular sinuses, branchial fistulae and malformation of the external ear. In Family I, a renal abnormality was an associated feature. In Family 2, two individuals had an abnormality of the incudostapedial joint. In both families inheritance was autosomal dominant with variable expressivity. The occurrence of external-ear malformations, branchial fistulae, and preauricular sinuses should indicate the need to search for a hearing loss not only in the patient but amongst relatives.

Abnormalities, Multiple↗