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6 Cards in this Set
- Front
- Back
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ACNS Guidelines Settings |
Stim rate 8-10 per second Trials 1000-4000 HF 2500-3000 Hz LF 10-30 Hz Analysis time 10-15 ms Sensitivity 10 microvolts Dwell time 10-15 microseconds |
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Wave times |
Wave 1 - 1.9ms Wave 2 - 3ms Wave 3 - 4.1 ms Wave 4 - 5.2 ms Wave 5 - 5.9 ms |
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Nerves and Generators |
Wave 1 Acoustic Nerve Wave 2 Cochlear Nucleus - Medulla Wave 3 Superior Olivary Nucleus - Pons Wave 4 Lateral Limniscus - Pons Wave 5 Inferior Colliculus - Midbrain Medial geniculate Auditory Cortex |
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Why would a BAER be done? Clinical applications |
Suspected MS Acoustic Neuromas Posterior Fossa Tumors Childhood screening for hearing disorders Evaluation of brainstem maturity in premature infants Intraoperative monitoring CLINICAL APPLICATIONS Ms Cerebellopontine Angle Tumors Coma and brain death Brain stem tumor Vascular lesions BAER in infants and young children |
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Factors affecting a BAER |
Physiological factors Age Gender Body temperature Drug effect Factors relating to consciousness Nonphysiological factors Click polarity Click frequency Stimulus intensity Stimulus rates |
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Near and far field potentials |
Wave 1 is near field Waves 2-5 are far field |
