Distortion product otoacoustic emissions in term infants after hypoxia-ischaemia

Jiang, Ze D.; Zheng, Zhangqian; Wilkinson, A

doi:10.1007/s00431-004-1569-8

Cited by 13 publications

(41 citation statements)

References 19 publications

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“…As we previously reported [3,4], during the examination, the subjects lay supine in a cot. The left and right ears were tested separately.…”

Section: Recording and Analysis Of Distortion Product Acoustic Emissionsmentioning

confidence: 98%

“…The third group (normal control) comprised 35 healthy infants (68 ears with a type A tympanogram). These infants had a 5-min Apgar score >7 and no perinatal problems [3,4].…”

Section: Subjectsmentioning

confidence: 99%

“…The first study group comprised 38 infants who suffered perinatal HI (66 ears with a type A tympanogram) and who had a 5-min Apgar score ≤6 and clinical signs of HIE [3]. They had an umbilical cord blood pH<7.10 at birth and signs of HI in cranial computed tomography and/ or ultrasound (US) scan.…”

Section: Subjectsmentioning

confidence: 99%

“…The subjects were selected from those we previously studied on days 3-5 and 1 month after birth [3,4]. The status of the middle ear is known to be critical for the measurement of OAEs [9,10].…”

Section: Subjectsmentioning

confidence: 99%

“…We have previously found some abnormalities in DPOAEs in newborn infants who had perinatal HI or who had a low Apgar score alone but no clinical signs of perinatal HIE [3,4]. More recently, we followed DPOAEs in these infants at 6 months of age to detect any change in cochlear function and examine any differences in cochlear function between the two groups of infants.…”

Section: Introductionmentioning

confidence: 95%

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Distortion product otoacoustic emissions at 6 months in term infants after perinatal hypoxia-ischaemia or with a low Apgar score

2007

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Distortion product otoacoustic emissions (DPOAEs) were analyzed at 6 months of age in term infants who had perinatal hypoxia-ischaemia (HI) and those who had a low Agar score alone to detect any abnormalities in cochlear function and any difference between the two groups of infants. The f2 primary tone was presented at ten frequencies (0.5-10 kHz). Both the left and right ears were tested. Compared to normal term controls, both the infants after perinatal HI and those with a low Apgar score alone showed lower DPOAE pass rates, mainly at 1-4 kHz at which the pass rates were decreased significantly (P < 0.05-0.01). The general pattern of DPOAE pass rates at different frequencies was similar in the two groups of infants. The pass rates at 1, 5 and 6 kHz tended to be lower in the infants after perinatal HI than those with a low Apgar score alone, although not statistically significant. Conclusions At 6 months of age, infants after perinatal HI or with a low Apgar score alone had a relatively poor cochlear function, mainly at 1-4 kHz. There are no major differences between the two groups of infants.

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“…As we previously reported [3,4], during the examination, the subjects lay supine in a cot. The left and right ears were tested separately.…”

Section: Recording and Analysis Of Distortion Product Acoustic Emissionsmentioning

confidence: 98%

“…The third group (normal control) comprised 35 healthy infants (68 ears with a type A tympanogram). These infants had a 5-min Apgar score >7 and no perinatal problems [3,4].…”

Section: Subjectsmentioning

confidence: 99%

Section: Subjectsmentioning

confidence: 99%