Using Narrow Band CE-Chirps to Elicit Cervical Vestibular Evoked Myogenic Potentials.
Quentin Mat, Naïma Deggouj, Jean-Pierre Duterme and 3 others
PMID 34611119WHAT IT FOUND
Narrow band CE-Chirps at 500 Hz produced larger cVEMP amplitudes and higher response rates in older adults compared to tone bursts.
This suggests they may reduce falsely absent results in elderly patients without needing to change the test frequency to 1000 Hz.
Key findings
01NB CE-Chirps 500 Hz produced significantly larger corrected amplitudes than tone bursts 500 Hz in healthy volunteers.
02In participants aged 56–74, NB CE-Chirps at both 500 Hz and 1000 Hz had significantly higher response rates than tone bursts at 500 Hz.
03Corrected amplitudes decreased with age regardless of the stimulus used, but latencies did not change with age.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
The study included only healthy volunteers, so it is unknown if NB CE-Chirps maintain this advantage in patients with actual vestibular disorders. The sample size was small (31 participants), and the oldest group had only 18 ears tested. The study did not compare the two stimuli for diagnostic accuracy (sensitivity/specificity) against a gold standard, only for amplitude and response presence. Presbyacusis was not an exclusion criterion, so hearing loss may have influenced results in some participants.
Declared interests
The authors declared no conflicts of interest. The work was supported by non-U.S. government funding.
The easy way to misread this
Do not assume NB CE-Chirps are diagnostically superior to tone bursts. This study showed larger amplitudes and fewer absent responses in healthy people, but it did not prove that CE-Chirps better identify patients with saccular disorders.