{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T12:53:46Z","timestamp":1783947226786,"version":"3.55.0"},"reference-count":15,"publisher":"Index Copernicus","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Otolaryngol Pol"],"published-print":{"date-parts":[[2020,5,18]]},"abstract":"<jats:p>&lt;b&gt;Background:&lt;\/b&gt; Patients with vestibular schwannoma (VS) most commonly present with hearing threshold reduction for high frequencies and a falling type of audiometric curve. However, it is doubtful whether all Pure Tone Averages described in the literature characterize patients with VS correctly, as the type of PTA which comprises higher frequencies may be more appropriate for hearing status assessment in those patients. &lt;br&gt;&lt;b&gt;Aim:&lt;\/b&gt; The aim of this study was to analyze 3 common methods of calculating Pure Tone Averages (PTA1 \u2013 500, 1000, 2000 and 3000 Hz; PTA2 \u2013 500, 1000, 2000 and 4000 Hz; PTA3 \u2013 500, 1000 and 2000 Hz) and to determine which of them is the most reliable for the assessment of VS patients. &lt;br&gt;&lt;b&gt;Material and Methods:&lt;\/b&gt; The study group included 86 patients operated on due to vestibular schwannoma accessed via the middle cranial fossa. &lt;br&gt;&lt;b&gt;Results:&lt;\/b&gt; Regarding the method of calculating Pure Tone Averages (PTA1, PTA2 and PTA3) identical or similar correlations were found between the preoperative values of Pure Tone Averages (PTA1, PTA2 and PTA3) and surgery-related hearing loss, as well as individual parameters of audiologic tests. &lt;br&gt;&lt;b&gt;Conclusions:&lt;\/b&gt; Pure Tone Averages calculated according to 3 different methods (PTA1, PTA2, PTA3) may be used interchangeably in the assessment of hearing in VS patients.\n\n<\/jats:p>","DOI":"10.5604\/01.3001.0014.1475","type":"journal-article","created":{"date-parts":[[2020,7,8]],"date-time":"2020-07-08T14:47:52Z","timestamp":1594219672000},"page":"11-16","source":"Crossref","is-referenced-by-count":5,"title":["Interchangeability of three different methods\nof calculating Pure Tone Average in patients\nwith vestibular schwannoma to assess the risk\nof surgery-related hearing loss"],"prefix":"10.5604","volume":"74","author":[{"given":"Aleksandra","family":"Ochal-Choi\u0144ska","sequence":"first","affiliation":[{"name":"Chair and Clinic of Otorhinolaryngology, Head and Neck Surgery, Medical University of Warsaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Magdalena","family":"Lachowska","sequence":"additional","affiliation":[{"name":"Department of Otorhinolaryngology, Head and Neck Surgery, Medical University of Warsaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Katarzyna","family":"Kurczak","sequence":"additional","affiliation":[{"name":"Department of Foreign Languages \u200b\u200bat the Medical University of Warsaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kazimierz","family":"Niemczyk","sequence":"additional","affiliation":[{"name":"Chair and Clinic of Otorhinolaryngology, Head and Neck Surgery, Medical University of Warsaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"3689","reference":[{"key":"203581r1","doi-asserted-by":"crossref","unstructured":"Committee on Hearing and Equilibrium guidelines for the evaluation of hearingpreservation in acoustic neuroma (vestibular schwannoma). American Academyof Otolaryngology-Head and Neck Surgery Foundation, INC. Otolaryngol HeadNeck Surg, 1995; 113(3): 179\u2013180.","DOI":"10.1016\/S0194-5998(95)70101-X"},{"key":"203581r2","doi-asserted-by":"crossref","unstructured":"Samii M., Matthies C.: Hearing preservation in acoustic tumour surgery. Adv TechStand Neurosurg, 1995; 22: 343\u2013373.","DOI":"10.1007\/978-3-7091-6898-1_6"},{"key":"203581r3","doi-asserted-by":"crossref","unstructured":"Samii M., Matthies C.: Management of 1000 vestibular schwannomas (acousticneuromas): the facial nerve-preservation and restitution of function. Neurosurgery,1997; 40(4): 684\u2013695.","DOI":"10.1097\/00006123-199704000-00006"},{"key":"203581r4","unstructured":"BIAP Recommendation 02\/1 bis \u2013 Audiometric classification of hearing impairments.biap.org. International Bureau Audiophonology 26 October 1996. Retrieved 18 June 2017."},{"key":"203581r5","doi-asserted-by":"crossref","unstructured":"Tutar H., Duzlu M., G\u00f6ksu N., \u00dcst\u00fcn S., Bayazit Y.: Audiological correlates of tumorparameters in acoustic neuromas. Eur Arch Otorhinolaryngol, 2013; 270(2):437\u2013441.","DOI":"10.1007\/s00405-012-1954-2"},{"key":"203581r6","doi-asserted-by":"crossref","unstructured":"Ochal-Choi\u0144ska A., Lachowska M., Kurczak K., Niemczyk K.: Audiologic prognosticfactors for hearing preservation following vestibular schwannoma surgery.Adv Clin Exp Med., 2019; 28(6): 747\u2013757.","DOI":"10.17219\/acem\/90768"},{"key":"203581r7","doi-asserted-by":"crossref","unstructured":"Hunt A.A., Cass N.D., Coughlin A., Gubbels S.P.: Time-based Assessment of HearingPreservation Rates After Microsurgical Resection of Vestibular Schwannomas:A Systematic Review. 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