title: Comparison of the effectiveness of monitoring Cisplatin-induced ototoxicity with extended high-frequency pure-tone audiometry or distortion-product otoacoustic emission.
abstract: OBJECTIVE
  To compare the effectiveness of monitoring cisplatin-induced ototoxicity in adult patients using extended high-frequency pure-tone audiometry (EHF-PTA) or distortion-product otoacoustic emission (DP-OAE) and to evaluate the concurrence of ototoxicity and nephrotoxicity in cisplatin-treated patients.
  
  
  METHODS
  EHF-PTA was measured at frequencies of 0.25, 0.5, 1, 2, 3, 4, 6, 8, 9, 11.2, 12.5, 14, 16, 18, and 20 kHz and DP-OAE at frequencies of 0.5, 0.75, 1, 1.5, 2, 3, 4, 6, and 8 kHz in cisplatin-treated patients (n=10). Baseline evaluations were made immediately before chemotherapy and additional tests were performed before each of six cycles of cisplatin treatment. Laboratory tests to monitor nephrotoxicity were included before every cycle of chemotherapy.
  
  
  RESULTS
  Four of 10 patients showed threshold changes on EHF-PTA. Five of 10 patients showed reductions in DP-OAE, but one was a false-positive result. The results of EHF-PTA and DP-OAE were consistent in two patients. Only one patient displayed nephrotoxicity on laboratory tests after the third cycle.
  
  
  CONCLUSIONS
  In our study, the incidence rate of cisplatin-induced ototoxicity was 40% with EHF-PTA or DP-OAE. Although both EHF-PTA and DP-OAE showed the same sensitivity in detecting ototoxicity, they did not produce the same results in all patients. These two hearing tests could be used to complement one another. Clinicians should use both tests simultaneously in every cycle of chemotherapy to ensure the detection of ototoxicity.
authors.affiliation: Department of Otolaryngology, Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea.
authors.forename: Kwang Kyu
authors.initials: KK
authors.lastname: Yu
authors.affiliation: Department of Otolaryngology, Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea.
authors.forename: Chi Ho
authors.initials: CH
authors.lastname: Choi
authors.affiliation: Department of Otolaryngology, Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea.
authors.forename: Yong-Hwi
authors.initials: YH
authors.lastname: An
authors.affiliation: Department of Otolaryngology, Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea.
authors.forename: Min Young
authors.initials: MY
authors.lastname: Kwak
authors.affiliation: Department of Internal Medicine, Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea.
authors.forename: Soo Jung
authors.initials: SJ
authors.lastname: Gong
authors.affiliation: Department of Otolaryngology, Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea.
authors.forename: Sang Won
authors.initials: SW
authors.lastname: Yoon
authors.affiliation: Department of Otolaryngology, Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea.
authors.forename: Hyun Joon
authors.initials: HJ
authors.lastname: Shim
keywords: Cisplatin; Otoacoustic emission; Ototoxicity; Pure-tone audiometry