"No Leak" Design
The patented "No Leak" design of the Passy-Muir™ Valves (PMVs) means that the
valve is always in a closed position until the patient inhales. The valve opens
easily with less than normal inspiratory pressures and closes automatically at
the end of the inspiratory cycle without air leak and without patient
expiratory effort. |
Closed System
Unlike open position speaking valves, the closed position of the PMV™ allows the
patient to create a positive airway pressure and restores the patient to a more
normal "closed respiratory system". The "closed system" also creates a
protective column of air in the tracheostomy tube which resists secretions from
moving up the tube and occluding the valve. Instead, secretions may be coughed
up around the tube and expectorated or suctioned from the mouth. |