Search for dissertations about: "tympanic membrane"

Showing result 21 - 25 of 25 swedish dissertations containing the words tympanic membrane.

  2. 21. Middle Ear Pressure; A New Method for Continuous Direct Measurements

    Author : Bo Tideholm; allergi och livskvalitet Laryngoesofagologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Otorhinolaryngology; man; physiology; sleep; posture; pressure; patulous Eustachian tube; middle ear; Ear; audiology; auditive system and speech; Otorinolaryngologi; audiologi; hörsel- och talorganen;

    Abstract : Disturbances in the pressure homeostasis of the middle ear (ME) system cause a pressure gradient across the tympanic membrane lessen the effectiveness of sound transmission and may be associated to development of chronic ME disease. An equipment for continuous direct pressure measurements was developed and was found to be accurate, base-line stabile and portable. READ MORE

  4. 22. Middle ear mechanics : using temporal bone experiments to improve clinical methods

    Author : Anton Rönnblom; Krister Tano; Magnus Von Unge; Mimmi Werner; Måns Eeg-Olofsson; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Middle ear; conductive hearing loss; ossiculoplasty; human temporal bone; Laser doppler vibrometry; malleus fracture; middle ear muscles; muscle fiber composition; Oto-Rhino-Laryngology; oto-rhino-laryngologi;

    Abstract : BackgroundThe middle ear transmits and amplifies sound vibrations from the tympanic membrane via three ossicles to the inner ear. Moreover, it contains two muscles, the stapedius muscle (SM) which protects the inner ear from loud noise, and the tensor tympani (TT) whose function is still debated. READ MORE

  5. 23. Inflammatory mediators and immunocompetent cells in the middle ear with particular regards to otitis media and tympanosclerosis

    Author : Marie Forséni Flodin; Karolinska Institutet; Karolinska Institutet; []
    Keywords : immunohistochemistry; inflammation; human middle ear; myringosclerosis; otitis media; rat; tympanosclerosis;

    Abstract : Tympanosclerosis is a well known sequela after acute and chronic otitis media. The pathologically calcified plaques are most commonly found in the tympanic membrane and if located only at this site, it is termed myringosclerosis. READ MORE

  6. 24. Hair cell and organ of corti responses to normal and intense acoustic stimulation

    Author : Anders Fridberger; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Cochlea; outer hair cells; calcium; pressure changes; micromechanics; noise-induced hearing loss; fluorescent indicators; laser interferometry; temporal bone preparation; guinea pig;

    Abstract : The principal aims of the studies described in this thesis were to develop an in vitro model for studying acoustic overstimulation at the cellular level, to define the electrical and mechanical response characteristics of the perfused temporal bone preparation, and to investigate the effects of intense sound stimulation on the calcium levels of the hair cells in the intact hearing organ. In the in vitro model for acoustic overstimulation, isolated cochlear outer hair cells were subjected to a pressure jet emanating from a glass micropipette aimed at the cell body. READ MORE

  7. 25. External otitis and its treatment : is a group III steroid without antibiotics sufficent therapy? Experimental and clinical studies

    Author : Per Emgård; Sten Hellström; Dan Bagger-sjöbäck; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Medicine; external otitis; external auditory canal EAC ; animal model; treatment; betamethasone; hydrocortisone; antibiotics; human study; Pseudomonas aeruginosa; Candida albicans.; Medicin; Dermatology and venerology; clinical genetics; internal medicine; Dermatologi och venerologi; klinisk genetik; invärtesmedicin; Oto-Rhino-Laryngology; oto-rhino-laryngologi;

    Abstract : ABSTRACT External otitis and its treatment. Is a group III steroid without antibiotics sufficient therapy? – Experimental and clinical studies Per Emgård, Department of Otorhinolaryngology, University of Umeå and Ystad Hospital, Umeå and Ystad, Sweden External otitis is one of the most common ear, nose and throat (ENT) diagnoses in out-patient clinics. READ MORE