Karatas Erkan, Göksu Sitki, Durucu Cengiz, Isik Yasemin, Kanlikama Muzaffer
Department of Otolaryngology Head and Neck Surgery, Faculty of Medicine, Sahinbey Medical Center, Gaziantep University, 27060 Gaziantep, Turkey.
Eur Arch Otorhinolaryngol. 2006 Aug;263(8):705-10. doi: 10.1007/s00405-006-0049-3. Epub 2006 May 6.
The aim of this study was to determine the degree and reversibility of hearing loss (HL) following spinal anesthesia with an objective audiometric test: otoacoustic emissions (OAE). Eleven patients (22 ears) who were undergoing surgery under spinal anesthesia were included in this study. Transient-evoked otoacoustic emissions (TEOAE) and distortion product otoacoustic emissions (DPOAE) were evaluated 1 day before the operation and postoperative day 1, 2, and 15. DPOAE were recorded as DPgram and input/output functions (I/O). The emission amplitudes of the TEOAE and DPOAE of right and left ears were found to be affected immediately after the surgery and progressive improvement detected with full recovery within postoperative 15 days. These changes were mainly at around 1,500-3,000 Hz. None of the patients had permanent OAE amplitude deterioration. Transient HL may occur more often than it is generally assumed, and the symptoms might not be recognized. OAE is an effective and objective way of evaluating the HL in this particular group of patients. We suggest informing patients about this transient HL for medicolegal issues.
本研究的目的是通过客观听力测试——耳声发射（OAE）来确定脊髓麻醉后听力损失（HL）的程度及可逆性。本研究纳入了11例接受脊髓麻醉手术的患者（22耳）。在手术前1天以及术后第1天、第2天和第15天评估瞬态诱发耳声发射（TEOAE）和畸变产物耳声发射（DPOAE）。DPOAE记录为DPgram和输入/输出函数（I/O）。发现手术刚结束时左右耳的TEOAE和DPOAE发射幅度均受到影响，术后15天内检测到逐渐改善并完全恢复。这些变化主要发生在1500 - 3000Hz左右。所有患者均未出现永久性OAE幅度恶化。短暂性HL的发生可能比通常认为的更频繁，且症状可能未被察觉。OAE是评估这一特定患者群体HL的一种有效且客观的方法。我们建议出于法医学问题考虑告知患者有关这种短暂性HL的情况。
