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Updated: Oct 28, 2025

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Bone Conduction Stimulated VEMP Using the B250 Transducer.

Karl-Johan Fredén Jansson1, Bo Håkansson1, Sabine Reinfeldt1

  • 1Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden.

Medical Devices (Auckland, N.Z.)
|July 16, 2021
PubMed
Summary

The new B250 transducer for bone conduction (BC) stimulation offers a more sensitive method for vestibular evoked myogenic potentials (VEMPs) testing compared to traditional air conduction (AC) methods. This BC stimulation requires lower hearing levels for VEMP responses.

Keywords:
B250bone conductionvestibular evoked myogenic potential

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Area of Science:

  • Neuroscience
  • Audiology
  • Vestibular System

Background:

  • Clinical testing of vestibular evoked myogenic potentials (VEMPs) traditionally relies on air conduction (AC) stimulation, which has limitations.
  • Bone conduction (BC) stimulation is an underutilized alternative for VEMP testing.

Purpose of the Study:

  • To compare the efficacy of a new B250 transducer for BC stimulation against the Minishaker and AC stimulation in VEMP testing.
  • To evaluate the hearing level requirements and response characteristics of different VEMP stimulation methods.

Main Methods:

  • Thirty healthy adults (20-37 years old, equal gender distribution) participated.
  • Ocular and cervical VEMPs were recorded under four conditions: B250 on mastoid (F M), Minishaker on forehead (F Z), B250 on forehead (F Z), and AC stimulation via insert earphone.
  • Hearing levels and response latencies (n10, n23) were analyzed.

Main Results:

  • B250 stimulation at the mastoid (F M) required significantly lower hearing levels (41 dB for ocular VEMP, 35 dB for cervical VEMP) compared to AC stimulation.
  • B250 at F M resulted in longer n10 (1.1 ms) and n23 (1.6 ms) latencies.
  • No significant difference in VEMP responses was observed between B250 at F M and Minishaker at F Z.

Conclusions:

  • VEMP testing with the B250 transducer at the mastoid (F M) yields comparable results to the Minishaker at the forehead (F Z).
  • B250 BC stimulation is more sensitive, requiring substantially lower hearing levels than AC stimulation for VEMP elicitation.
  • The B250 transducer represents a promising tool for improved VEMP testing, particularly in individuals with hearing impairments.