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ORIGINAL RESEARCH

The Effect of Spinal Anesthesia on Cochlear Functions
Spinal Anestezinin Koklear Fonksiyonlara Etkisi
Received Date : 01 Dec 2019
Accepted Date : 07 Jan 2020
Available Online : 14 Jan 2020
Doi: 10.24179/kbbbbc.2019-72664 - Makale Dili: TR
KBB ve BBC Dergisi. 2020;28(1):30-5
Copyright © 2020 by Turkey Association of Society of Ear Nose Throat and Head Neck Surgery. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
ABSTRACT
Objective: The aim of this study was to investigate the effect of spinal anesthesia on cochlear function. Material and Methods: This study included 36 American Society of Anesthesiologists I-II patients between 18-50 years and who had undergone spinal anesthesia in the urology clinic with having no contraindications for spinal anesthesia. The patients had no ear problems before. Distortion product otoacoustic emissions (DPOAE) were performed three times (preoperative, postoperative 1st day and postoperative 7th day) for each patient with normal preoperative pure tone audiometry and tympanometry. The signal-to-noise ratio (SNR) at 1000, 1500, 2000, 3000, 4000, 6000 and 8000 Hz frequency results were compared with each other. Results: No significant difference were observed between the DPOAE signal-to-noise ratios (SNR) measured preoperative and on days 1 and 7 after spinal anesthesia for both right and left ears (p>0.05). Only one patient had sudden hearing loss at low frequencies on the first postoperative day. Intravenous steroid treatment was administered to the patient. On the 7th postoperative day, hearing loss improved. Conclusion: Hearing loss is an important complication of spinal anesthesia. Therefore both the anesthesiologist and the surgeon should inform the patient about this possible complication.
ÖZET
Amaç: Spinal anestezinin koklear fonksiyonlara etkisinin incelenmesidir. Gereç ve Yöntemler: Bu çalışmaya, üroloji kliniğinde spinal anestezi ile opere olan, spinal anestezi açısından kontrendikasyonu olmayan, Amerikan Anestezistler Derneği I-II, yaş aralığı 18-50 yıl olan, işitme kaybı oluşturacak herhangi bir kulak problemi olmayan 36 hasta dâhil edildi. Preoperatif saf ses odyometrileri (SSO) ve timpanometrileri normal olan hastalara preoperatif, postoperatif 1. gün ve postoperatif 7. gün distortion product otoakustik emisyon (DPOAE) yapıldı. 1000, 1500, 2000, 3000, 4000, 6000 ve 8000 Hz frekanslarında ölçülen sinyal gürültü oranları [signal-to-noise ratios (SNR) preoperatif, postoperatif 1. gün ve postoperatif 7. gün birbirleriyle mukayese edildi. Bulgular: Hastaların preoperatif, postoperatif 1. gün ve postoperatif 7. gün DPOAE 1000, 1500, 2000, 3000, 4000, 6000 ve 8000 Hz frekanslarında SNR sonuçları karşılaştırıldığında hem sağ hem sol kulakta istatistiksel anlamlı farklılık izlenmedi (p>0,05). Bir hastada ise postoperatif 1. günde alçak frekanslarda belirgin olan ani işitme kaybı gelişti. Hastaya intravenöz steroid tedavisi düzenlendi. Postoperatif 7. günde işitme kaybının iyileştiği görüldü. Sonuç: İşitme kaybı, spinal anestezinin önemli komplikasyonlarındandır. Gerek anestezi uzmanı, gerekse cerrahi işlemi yapacak olan hekimin bu olası komplikasyon açısından hastayı öncesinde bilgilendirmesi önemlidir.
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