Patent ID: 6102038
Filing Date: 2000-08-15
Classification: A61M

Abstract:
An exhalation valve assembly for a mechanically ventilated patient, comprising:a) a first conduit having a first end configured for connection to a patient, and a second end;b) a second conduit having a first end configured for connection to a ventilator, and a second end in fluid communication with the second end of the first conduit;c) a third conduit having a first end in fluid communication with the first and second conduits, and a second end openable to atmosphere;d) a valve located adjacent the second end of the third conduit and biased in the closed position so as to controllably open the second end of the third conduit; ande) a fourth conduit substantially coaxial with the valve and said third conduit and configured for connection to a source of exhalation drive pressure for communicating the exhalation drive pressure to the valve;f) the valve comprising:a spring engaged by a rotatable cap and an axially movable spring seat arranged to vary the bias of the spring by rotation of the cap; anda chamber exposed to exhalation drive pressure from said fourth conduit and being arranged to lock the valve closed by the exhalation drive pressure.