I'm a home health nurse. This is a picture of a ventilator for a toddler. The red part that is circled is what I'm concern about. It will always show numbers. Recently, for a few minutes, it showed no numbers but no alarms went off but the child was visibly okay. This happened twice. It worries me because it never happens before while working on this case. Parents brush it off and don't want to further investigate. Parents don't want to make a doctor appointment or go to ER. Any advice about what to do? Is this concerning?