Resuscitation valve assembly
AssigneeLife Support Technology Corporation
InventorRobert M. Hamilton
Life of this patent
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Abstract
A resuscitation valve assembly includes a housing with an inlet port adapted to be connected to a pressurized breathable gas source, such as oxygen, an outlet port adapted to be connected to a patient's airway and an ambient air port. The inhalation chamber is connected to the pressurized gas source when a manually operated valve, within the housing, is open and is disconnected from the inhalation chamber when the valve is closed. An inhalation/exhalation check valve is disposed between the inhalation chamber, the outlet port and the ambient air port to conduct the high pressure gas through the outlet port and into the patient's airway, vent the patient's exhaled gas through the ambient air port and allow ambient air to flow through the outlet port in response to the patient's spontaneous breathing.
Claims17
A resuscitation valve assembly apparatus comprising:
- a) a pressurized source of breathable gas;
- b) a valve housing having an inlet port connected to the pressurized breathable gas source, an outlet port adapted to be connected to an individual's airway, an inhalation chamber disposed between the inlet and outlet port and an ambient air port;
- c) a manually operated valve mounted in the housing for connecting the inhalation chamber to the inlet port to supply pressurized gas to the inhalation chamber in a first or open position, the inhalation chamber being disconnected from the inlet port when the manually operated valve is in a second or closed position regardless of the inhalation chamber pressure to prevent pressurized gas from entering the inhalation chamber;
- and
- d) an unbalanced inhalation/exhalation check valve disposed within the housing and adjacent the outlet and ambient air port for allowing fluid at above ambient air pressure within the inhalation chamber to pass through the outlet port and enter the individual's airway, for venting the individual's exhaled gas through the ambient air port, and for connecting the outlet port to atmosphere in response to a sub-atmospheric pressure within the outlet port to allow air to enter the individual's airway.
A resuscitation valve assembly apparatus comprising:
- a) a pressurized source of breathable gas;
- b) a valve housing having an inlet port connected to the pressurized breathable gas source, an outlet port adapted to be connected to an individual's airway, an ambient air port and an inhalation chamber disposed between the inlet and outlet port, the housing defining a fluid passageway between the inlet port and the inhalation chamber;
- c) a manually operated valve mounted within the passageway, the valve being arranged to connect the inhalation chamber to the inlet port to supply pressurized gas to the inhalation chamber in an open position and to disconnect the inhalation chamber from the inlet port when the manually operated valve is in a closed position whereby fluid cannot flow from the inlet port to the inhalation chamber when the manually operated valve is in a closed position regardless of the inhalation chamber pressure;
- and
- d) valve means disposed in the housing adjacent the outlet and ambient air ports for allowing fluid at above ambient air pressure within the inhalation chamber to pass through the outlet port and enter the individual's airway and for venting the individual's exhaled gas through the ambient air port, and for connecting the outlet port to atmosphere in response to a sub-atmospheric pressure within the outlet port to allow air to enter the individual's airway when spontaneous breathing commence.
Dependencies are inferred from the claim text.