If the cuff no longer works on your ET tube - cut if off! I know that sounds drastic but it will stop other staff members from trying to inflate it!
I find often that the stoppers on the cuff come undone, so after you have inflated it - use the cover of a needle to place over and that ensure it stays done!
PS: Whilst you're here, take a moment to see our latest job opportunities for vet nurses.
We always use needle covers to keep out tubes inflated, works much better than the stopper!