Nine years on, and again we have problems with HFOV circuits. We used the first two circuits in a new batch, and found leaks developed around the hose sealing around the connection on the humidifier after a few hours of use. The second time, the hose from the vent to the humidifier flopped over and sealed itself off, effectively turning off the vent. These circuits seem to be made from very soft plastic indeed.
We have sent all info to Aquilant/Vyaire and the MHRA, and devised work-arounds to make the system safer. Anyone else having this trouble?