{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2022,3,30]],"date-time":"2022-03-30T21:03:23Z","timestamp":1648674203558},"reference-count":0,"publisher":"Index Copernicus","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Otolaryngol Pol"],"published-print":{"date-parts":[[2017,10,30]]},"abstract":"<jats:p>Introduction: Surgical treatment of conductive hearing loss runs the risk of damage to the inner ear in the mechanism\nof acoustic trauma.\nAim: The aim of this study was to evaluate the function of the organ of Corti, expressed as bone conduction threshold\nat the frequency of 4000 Hz for selected operations: mastoidectomy and canal-wall-down procedure.\nMaterial and methods: The material was collected from patients with chronic otitis media in the Department of\nOtolaryngology and ENT Oncology, Collegium Medicum of Nicolaus Copernicus University in Bydgoszcz in 2004\u20132009. All patients were examined with pure tone audiometry threshold before surgery and at least three years after\nsurgery. The analyzed group of patients was divided into subgroups depending on the type of operation according to\nTo classification and procedures for resection: mastoidectomy and canal-wall-down procedure. The results were statistically\nanalyzed.\nResults: In the analyzed period of three years after surgery there was no statistically significant difference between\ngroups, although there were higher values for tympanoplasty type 1 with mastoidectomy compared with tympanoplasty\ntype 1 without mastoidectomy - respectively 25.67 dB and 18.53 dB. In the study, there was no statistically significant\nthe difference in bone conduction threshold for frequency 4000 Hz within the type 2 tympanoplasty according to\nTosa comparing canal wall-up and canal-wall-down procedure.\nConclusions: Mastoidectomy or canal-wall-down procedure do not affect the bone conduction threshold for a frequency\nof 4000 Hz after tympanoplasty in long-term observation.\n\n<\/jats:p>","DOI":"10.5604\/01.3001.0010.5312","type":"journal-article","created":{"date-parts":[[2017,10,17]],"date-time":"2017-10-17T10:32:00Z","timestamp":1508236320000},"page":"12-17","source":"Crossref","is-referenced-by-count":0,"title":["The late results of 4000 Hz frequency bone conduction after tympanoplasty"],"prefix":"10.5604","volume":"71","author":[{"given":"Joanna","family":"Janiak-Kiszka","sequence":"first","affiliation":[{"name":"Sensory Organs Department Nicolaus Copernicus University Collegium Medicum in Bydgoszcz, Poland, Head: dr hab. Wojciech Ka\u017amierczak"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wojciech","family":"Ka\u017amierczak","sequence":"additional","affiliation":[{"name":"Sensory Organs Department Nicolaus Copernicus University Collegium Medicum in Bydgoszcz, Poland, Head: dr hab. Wojciech Ka\u017amierczak"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"3689","container-title":["Otolaryngologia Polska"],"original-title":[],"deposited":{"date-parts":[[2017,10,17]],"date-time":"2017-10-17T10:32:02Z","timestamp":1508236322000},"score":1,"resource":{"primary":{"URL":"http:\/\/otolaryngologypl.com\/gicid\/01.3001.0010.5312"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,10,30]]},"references-count":0,"journal-issue":{"issue":"5","published-print":{"date-parts":[[2017,10,30]]}},"URL":"https:\/\/doi.org\/10.5604\/01.3001.0010.5312","relation":{},"ISSN":["0030-6657","2300-8423"],"issn-type":[{"value":"0030-6657","type":"print"},{"value":"2300-8423","type":"electronic"}],"subject":[],"published":{"date-parts":[[2017,10,30]]}}}