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Braz J Otorhinolaryngol. 2008 May-Jun;74(3):401-9.

Study of distortion-product otoacoustic emissions during hypothermia in humans.

Abstract

AIM:

To evaluate the function of cochlear outer hair-cells under the influence of extra-corporeal circulation and moderate hypothermia during cardiac surgery.

STUDY DESIGN:

Prospective clinical study.

METHODS:

Distortion-product otoacoustic emissions (DPOAE) were registered before surgery, immediately after general anesthesia induction, during extra-corporeal circulation with moderate hypothermia and after the surgical procedure.

RESULTS:

Comparison of response-amplitudes before and after surgery and before and after general anesthesia initiation did not demonstrate statistical difference. Comparison of amplitudes before and after extra-corporeal circulation with moderate hypothermia demonstrated a statistically significant decrease in responses amplitudes during hypothermia.

CONCLUSIONS:

The amplitudes of DPOAE decreased during moderate hypothermia induced during extra-corporeal circulation.

PMID:
18661015
[Indexed for MEDLINE]
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