I've been assigned to evaluate the swallowing function of a tracheostomized pt. A colleague told me about the blue dye test. I've never performed this test. At the hospital, they do not have the blue dye for the evaluation. Do you use food coloring? What would be the process? How would you perform a swallowing trial to a tracheostomized pt? I know that you need the cuff to be deflated prior the assessment and it is important to verify changes in oxygen saturation during swallowing and cuff deflation. Thank you for your advise!