This video demonstration is of myself (James Curtis, PhD, SLP) facilitating a reflex cough testing chronic cough assessment in Allie Beam, MS, SLP. In this video, we complete both natural cough threshold (NCT) and suppressed cough threshold (SCT) using a continuous breathing technique with nebulized citric acid.
In this video, we present 2-3 trials of multiple different concentrations, moving progressively higher in concentration from 0.01 mol/L of citric acid up to 0.40 mol/L of citric acid, with saline (0.00 mol/L) randomly interspersed. We progress until we identify Allie's NCT, which for this procedure, was defined as the lowest concentration to elicit as a two-cough response on 2/3 trials. For Allie, their NCT was 0.40 mol/L - seen at 10 minutes 30 seconds in the video. At 11 minutes 36 seconds, we then proceed to assess SCT by beginning at one concentration below their NCT, and then moving progressively higher. For Allie, the SCT was also 0.40 mol/L.
For more information on reflex cough testing, and information related to this video, please visit [ Ссылка ]
