(1) Their use is indicated in large or total defects to restore the natural anatomical conical shape of the eardrum, particularly in congenital atresia.
(2) Primitively, vibrations reached the stapes mainly via the anterior hyoid cornu, but in dicynodonts, therocephalians, and cynodants vibrations passed mainly or exclusively from mandible to quadrate to stapes and the reflected lamina was a component of the eardrum.
(3) An attempt was made to answer the question whether it is justified to set an age limit for performance of eardrum reconstructions in children.
(4) A possible relationship of primary auditory and primary nonauditory blast injury was discussed, and it has been concluded that more severe rupture of the eardrum in the injured by mine explosion can suggest the presence of primary blast injuries.
(5) His back was also injured, and both his eardrums burst, he said.
(6) The nature of the acoustic coupling limits the passive energy absorption and transmission properties of the eardrum.
(7) The hierarchy illuminates some of the limitations of various simplified elements commonly used to model the middle ear and demonstrates the necessity of treating the acoustics and the eardrum as an integrated subsystem.
(8) Large variations of sound pressure along the ear canal and over the surface of the eardrum are found above about 10 kHz.
(9) The acoustical energy reflectance at the eardrum, as calculated from a model of the ear canal when terminated by the middle ear model, agrees reasonably well with experimental data up to about 12 kHz.
(10) The tubal compliance index (TCI), which is the ratio of the tubal resistance between two different air flow rates, was compared among three groups: 36 ears of children with otitis media with effusion (OME), 26 ears of adult OME patients, and 10 otherwise normal ears with traumatic perforations of the eardrum.
(11) A major part of this alteration is due to the interaction of various mechanical and acoustic resonances which are characteristic of the hearing-aid receiver and the sound transmission system linking the receiver with the eardrum.
(12) I hope I don't sound too much of fuddy-fuddy -- actually, I know I do -- but surely the point of an athletics meet is to watch athletics and see people run and throw things -- and not to have your eardrums assaulted by a booming bass beat?
(13) The present study also included gross and histopathological examinations of the eardrum and observation of fibers of the lamina propria of the transplanted tympanic membrane by means of polarizing microscopy and of vascularization by intravascular India ink injection.
(14) In cases of retraction of the eardrum, the otoemissions were present in 2 of 23 ears.
(15) However, based on calculations of anticipated leakage of H2S for a variety of eustachian tube conditions and in the absence of either medical literature or personal reports documenting H2S poisoning due to eardrum perforation, the recommendation for excluding workers with such a condition from working in or around H2S is not supported.
(16) The auditory sensitivity of the rats with cotton-stuffed ears and the pierced eardrums decreased about 10 and 20 dB, respectively.
(17) Twenty-five eardrums of 15 healthy children without past or present history of otological disease were examined using otoscopy; a photograph of each eardrum was obtained.
(18) Perforated eardrums were found in 13.9% of Aboriginal and in 0.3% of European children's ears, and this abnormality was strongly associated with low weight and height status.
(19) Revised acoustic energy reflection coefficients, at the eardrum, are obtained for 20 ears for frequencies between 3 and 13 kHz.
(20) Three children whose eardrums appeared normal upon previous examinations, one with the otomicroscope, apparently developed tympanic membrane cholesteatomas that penetrated the fibrous layer of the pars tensa.
Tympanum
Definition:
(n.) The ear drum, or middle ear. Sometimes applied incorrectly to the tympanic membrane. See Ear.
(n.) A chamber in the anterior part of the syrinx of birds.
(n.) One of the naked, inflatable air sacs on the neck of the prairie chicken and other species of grouse.
(n.) The recessed face of a pediment within the frame made by the upper and lower cornices, being usually a triangular space or table.
(n.) The space within an arch, and above a lintel or a subordinate arch, spanning the opening below the arch.
(n.) A drum-shaped wheel with spirally curved partitions by which water is raised to the axis when the wheel revolves with the lower part of the circumference submerged, -- used for raising water, as for irrigation.
Example Sentences:
(1) To test ciliary clearance, the fluid was placed in either the tympanum or the mastoid bulla.
(2) These areas are the anterior epi-tympanum, the recess between the tympanic membrane and the anterior and inferior canal walls, the facial ridge and the sump that can form behind it, the sino-dural angle and the mastoid tip.
(3) This study has demonstrated the anatomical relations of the cochlea to structures in the medial wall of the tympanum, and has shown that surgical access can be obtained to the terminal auditory nerve fibres supplying the basal, middle and apical turns of the cochlea.
(4) From this preliminary investigation, the device successfully maintained atmospheric pressures in the tympanum, compensated for Eustachian tube malfunction, prevented otorrhea and recurrence of middle ear effusions.
(5) Temperature within the brain and the esophagus and at the tympanum were obtained in a 12-yr-old male in a series of experiments that began 8 days after surgery for implantation of a drainage catheter.
(6) This is invariably indicated on a pre-operative basis, except in two circumstances: --when the glomus, tumour is small and situated close to the drum of the tympanum, its surgical excision posing no problem of haemostasis under these circumstances: --when radiotherapy is envisaged as treatment of the glomus tumour when surgery is impossible.
(7) Although the clinical importance of these differences remains to be established, the authors believe they are substantial enough to justify continued use of tympanostomy tubes in the primary surgical therapy of chronic secretory otitis media, when medical therapy and observation indicate the need for drainage to improve hearing or correct anatomic deformities of the tympanum.
(8) The thick tympanum, while disadvantageous as an aerial receptor, likely enhances low-frequency bone conduction hearing.
(9) The inflammatory process, issuing from the external auditory passage and under circumvention of the tympanum, spreads to the skull base and according to the localisation causes adequate pareses of the brain nerves.
(10) Massive discharge occurred only with low viscosity fluid placed in the tympanum, whereas small amounts of highly viscous fluid were cleared by linear discharge.
(11) Otorrhea is the most common complication of surgical drainage of the tympanum for the treatment of chronic secretory otitis media.
(12) The authors report six cases of rare ear diseases: fibrous dysplasia of the tympanum mimicking an partially obstructive osteoma of the external auditory canal.
(13) The tube with a beveled head and split shank is very convenient and effective for the treatment since it is not only easily inserted but also easily removed, preventing it from migration into the tympanum.
(14) The existing peri-ligamentous space of the disco-malleolar ligament is a latent way between temporomandibular joint rear and tympanum.
(15) It has been assumed that the common inheritance of all early tetrapods was a light, rod-like stapes associated with a temporal notch in the otic region that was thought to have supported a tympanum, or eardrum.
(16) Seromucous effusions were found in the tympanum in 91% of 208 cases of cleft palate.
(17) The experimental evidence of cochleovestibular toxicity of aminoglycosides applied locally in the presence of a perforated tympanum leaves no room for doubt.
(18) Insertion of tympanostomy tubes to provide prolonged aeration and drainage of the tympanum in cases of chronic secretory otitis media has become the most commonly performed operation in children.
(19) In all animals, nontympanic surfaces were most responsive to low frequencies, and the tympanum was most responsive to high frequencies.
(20) The method seems to have the following merits: permanent ventilation of the tympanum with preservation of an intact drum (from the functional point of view); no tympanophonia or autophonia; simple technique, short operative period (five minutes); no risk of postoperative complications; and no danger of ascending infection of the middle ear from the ear canal.