It’s difficult to answer the question about how close you can get to threshold using eABR. eABR testing allows us to record a threshold on the equipment, and this is then used to set the T level on the CI device. There’s a few interesting points I’d raise about this:
And so, our implementation of eABR is that it’s an efficient starting point as there is a very good link between eABR levels and T levels (far more so than NRT/eCAP) and the fact that we can record lower thresholds, and from further along the nerve than NRT/eCAP, with eABR really puts it in the strongest position for use in CI programming. However, adjustments may be needed based on other tests and patient/parental reporting. Truly, a test battery approach is required to create the optimum CI map.