The VacuAide QSU (Quiet Suction Unit) is designed to perform effective airways suctioning in a comfortable, safe and hygienic way. Low noise, exceptional performance The first thing you notice about the QSU is how quiet it is especially when compared to many other competitive devices. We think its one of the quietest available for its type. Yet the exceptional low noise does not mean that the performance has been compromised. With a suctioning pressure range from 50 - 550 mmHg delivered at 27 l/min flow rate, it is designed to most