Question
How does tachypnea increase the risk of aspiration?
Answer
Another thing to keep in mind is respiratory status and dysphagia. We know that respiratory rate and swallowing function are closely linked because to swallow, we have to be able to hold our breaths. When we have a respiratory rate over 30, we have to hold our breath for 1 to 2 seconds to swallow. That means a respiratory rate of 30 requires us to breathe every 2 seconds within that minute. If we have to hold our breath and breathe that quickly, then it increases the likelihood that that person, rather than exhaling, which is the normal pattern after swallowing, is going to gasp for a breath. It is going to be more challenging for them to manage. Now, a respiratory rate of 30 is the benchmark where we start to look for potential trouble. It does not mean, "No, they cannot swallow." There is a high risk for aspiration when we get above 30, into the 40s, and beyond.
This Ask the Expert is an edited excerpt from the course, Brain Injury Effects on the Respiratory System, presented by Sarah Busser, MA, CCC-SLP, CBIS.
