Optimisation of Mechanical Insufflation:Exsufflation

For people living with conditions that make their muscles weaker, like some types of muscular dystrophy, breathing can become a challenge. This often means the muscles you use to cough aren't as strong as they should be. When you can't cough effectively, mucus can build up in your airways, leading to infections and making it harder to breathe. To help with this, doctors sometimes recommend a special device called a mechanical insufflation-exsufflation (MIE) machine.

This machine works by gently pushing air into your lungs (insufflation) and then quickly pulling it out (exsufflation), to mimic a strong cough and help clear out mucus. While we know these devices are helpful, we're still learning about the very best way to use them. For example, using too much pressure might cause problems, even though some studies hint that higher pressures could be useful. We need to find the right balance so that these machines are as effective as possible without any risks.

This study wants to figure out the best settings for these MIE machines. We'll be looking at things like how much air we can gently push in to help widen your lungs, what the smallest pressure difference is needed to help clear mucus, whether these settings might accidentally cause your throat to close up (which would not be helpful for clearing mucus), and what patients themselves think about using these machines, as their comfort and ease of use are really important.