Automatisierte H�rschwellenbestimmung bei Neugeborenen mit extrapolierten DPOAE-Wachstumsfunktionen

Abstract

The method fulfils the essential criteria for screening newborn hearing. It is fast and easy to handle, and measurement and data analysis are performed automatically. Preliminary results suggest that the new method is able to differentiate between transitory middle-ear dysfunction and persisting cochlear disorders. Due to its better diagnostic capabilities in comparison to TEOAE, DPOAE, and FAEP, this method may provide a new instrument with which to make a fast evaluation of hearing function in children.

Middle ear and cochlear disorders result in different DPOAE growth behaviour: implications for the differentiation of sound conductive and cochlear hearing loss

“…However, Janssen et al (2003) evaluated the slope of DPOAE I/O-functions in their neonate study. They compared the slope obtained within the early postnatal period (mean age: 3 days) to that obtained in a follow-up measurement four weeks later and found the slope to be unchanged although there was a significant increase in the DPOAE level and a significant decrease in the estimated DPOAE threshold level.…”

“…A decrease in DPOAE level was also observed by these authors by filling the bulla with fluid. Janssen et al (2003) applied extrapolated DPOAE I/Ofunctions (following the method of Boege and Janssen (2002)) in human neonates to estimate pure-tone thresholds and compression. The estimated pure-tone thresholds were found to be increased within in the early postnatal period, predominantly at the higher frequencies, and to reach normal levels in a follow-up measurement four weeks later.…”

Technological advances in Universal Neonatal Hearing Screening (UNHS)

“…Using various setups of the DPOAE I/O stimuli, one can estimate the cochlear compression, which is related to a specific threshold value [31,35]. Janssen et al [36] used this concept to produce a relationship between DPOAE I/O amplitude values and hearing threshold. According to their data, "The hearing threshold was found to be increasing within the early postnatal period (average age: 3 days), predominantly at the higher frequencies, and to be normalized in a follow-up measurement (after four weeks).…”

Diagnostik des endolymphatischen Hydrops mit tieftonmodulierten DPOAE

“…Für alle un ter such ten Per so nen wur de vor ab ein Ton schwel lenau dio gramm im Be reich von 0,25-8 kHz auf ge nom men und für die Mess fre quenz f 2 die sub jek tiven Hör schwel le auch mit tels der Mess sonde be stimmt, da der Ent ste hungs ort der DPOAE in der Nähe von f 2 auf der BM vermu tet wird [8]. Alle Un ter su chun gen wurden mit ei nem Pri mär ton pe gel L 2 =20 dB SL durch ge führt.…”

“…En do lym phat ic hy drops · Menière's dis ease · Low-fre quen cy mod u la tion · Dis tor tion prod uct otoa cous tic emis sions · DPOAEs Di ag no sis of en do lym phat ic hy drops us ing low fre quen cy mod u lat ed dis tor tion prod uct otoa cous tic emis sions Die Mo du la ti onss pan ne M S ist im Paarver gleich für die Pa ti en ten grup pe (Me di an 6,5 μPa) klei ner als für die Ver gleichs gruppe (8,9 μPa), aber nicht sig ni fi kant un terschied lich (p<0,18). Die sup pri mier te mittle re DPOAE-Am pli tu de D M ist für die Pa tien ten grup pe (Me di an 12,5 μPa) ge gen über der Kon troll grup pe (4,4 μPa) sig ni fi kant grö ßer (p<0,02), eben so wie das Ver hält-nis D M /D 0 (Pa ti en ten ip si la te ral: Me di an 0,86, Kon troll grup pe: 0,5, p<0,012).…”