ABSTRACT
Distortion products are a subtype of otoacoustic emission. The normality of distortion products reflects correct outer hair cell function. Test results obtained from patients with neurosensorial, cochlear and retrocochlear hearing loss were analyzed, focusing on four points: correlation with audiometric results, reliability for the follow-up of dynamic cochlear disorders, frequency specificity, and topographic diagnosis.
Subject(s)
Cochlea/physiopathology , Hearing Loss, Sensorineural/physiopathology , Audiometry, Pure-Tone , Hearing Loss, Sensorineural/diagnosis , HumansABSTRACT
Evoked otoacustic emissions recording hold some promise as a fast objective and non-invasive audiological procedure to study the cochlea at the outer hair cell level. This study has been made in 100 voluntary normal hearing adults. We evaluate the auditory system by means of evoked otoacustic emissions with a non-linear click. This report resumes methods and results in these normal grown-up ears.
Subject(s)
Acoustic Stimulation , Cochlea/physiology , Hearing/physiology , Adult , Humans , Middle AgedABSTRACT
Distortion product otoacoustic emissions (DPEs) are a subtype of evoked otoacoustic emissions that represent a class of cochlear response. Because of their frequency specificity and the wide range of frequencies explored DPEs have a great potential for clinical use. DPEs studies include DP-audiograms and input/output functions. We recorded 27 DPEs, 24 of them from normal ears and 3 from pathological ears. This report resumes methods and results.
Subject(s)
Basilar Membrane/physiopathology , Cochlear Microphonic Potentials , Hearing Loss, Sensorineural/physiopathology , Acoustic Stimulation , Adult , Audiometry, Pure-Tone , Female , Humans , Male , Meniere Disease/physiopathology , Otosclerosis/physiopathology , Reference ValuesABSTRACT
Herein we explain the experiences we have had, in the ORL department of the HCU of Valencia, al along a period of seven years, by using the formaldehyde formed fascia graft, exposing the anatomical and functional results obtained after a minimum pursuit of five years on a sequence of 188 myringoplasties. With such method we got to close the tympanic membrane, and that they remain entire after five years, on the 72.87% of the cases, getting improvement of audition determined by a reduction of the air-bone gap greater than 15 dB, in the 62.77% of the cases. Such results are obtained with a very slight number of complications. This all makes us to consider this technique as the proper one in cases where perforation is greater than 50% of tympanic membrane.
Subject(s)
Bioprosthesis , Fascia/transplantation , Myringoplasty/methods , Tympanic Membrane Perforation/surgery , Adolescent , Adult , Aged , Child , Child, Preschool , Fascia/drug effects , Female , Follow-Up Studies , Formaldehyde/pharmacology , Humans , Infant , Male , Middle Aged , Retrospective Studies , Treatment OutcomeABSTRACT
Retrospective survey done with 27 patients of epidermoid carcinoma of the piriform sinus in order to ascertain the degree of regional spread--both clinic and histologic--of the neoplasm and also set up the relation between the actual adenopathies, the rate of recurrences and the actuarial survival at 5 years post-treatment term. The checked results show the bad prognosis of such tumors irrespective of the most aggressive surgery (partial hemipharyngectomy plus total laryngectomy plus neck dissection and postoperative X-ray therapy). The actuarial survival accounts for 29.6 percent after 5 years. The AA. confirm a great lymphophile tendency with an invasion percentage amounting to 55.6 percent but with a certain clinic-histologic disagreement. Relation between the frequency of adenopathies (clinical and histological), the survival and the recurrences at 5 years is indicative to a great extent that adenopathies are a pejorative circumstance of these neoplasms.
