Objective Audiometry Using an Autonomic Reflex
1993 Volume 1993 Issue Supplement61 Pages 33-37
Details
1993 Volume 1993 Issue Supplement61 Pages 33-37
Blood flow in the finger tip (FBF), blood pressure (BP) and pulse rate (PR) in the finger artery was measured after sound stimulation in 7 adults with normal hearing. A Laser Doppler flowmeter (ADVANCE ALF-21) and a finger arterial blood pressure monitor (Ohmeda 2300, Finapres) were used. FBF definitely decreased after stimulation with short pure tone of at least 25 dB over the hearing level. Although increasing responses of BP and PR after sound stimulation were observed, these responses were not clear. In two cases, since the backgrounds of FBF were unstable, an averaging technique was required for useful recording. Results obtained suggested that the recording of FBF could be useful for objective audiometry.
