Dual-pressure respiratory assistance device
OwnerAnna John, Stephen Johninventors
Life of this patent
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Abstract
A respiratory system provides bi-level pressure using a dual pressure device in fluid communication with a source of breathable gas and a patient interface. The dual pressure device includes a pipe submerged in a liquid in a container, and a float disposed along the pipe. The float cyclically moves up and down the pipe between a lower position and an upper position as the floats buoyancy changes. The floats position along the pipe causes the gas pressure level to alternate between a baseline pressure level and a peak pressure level by selectively blocking and unblocking an opening in the pipe, and selectively capturing and releasing gas from the float, with the maximum gas pressure being limited by the setting on a pressure relief valve.
Claims20
A respiratory delivery system providing a bi-level pressure, the respiratory delivery system comprising:
- a container configured to support a volume of liquid;
- a pipe disposed in said container and configured to be at least partially submerged into the volume of liquid, said pipe defining at least one vent opening at a midsection thereof, wherein said pipe is configured to receive a flow of breathable gas from a gas source;
- a variable buoyancy float disposed along said pipe and inside said container, said float configured to cyclically float up and down said pipe between a lower position and a higher position, wherein said at least one vent opening is occluded by said float in the higher position;
- and
- an adjustable pressure regulator in fluid communication with said pipe;
- wherein said float is configured to cyclically shift a pressure level of the breathable gas in said respiratory delivery system between a baseline pressure level when said float is in the lower position and gas bubbles are permitted to escape from said at least one vent opening, and a peak pressure level that is higher than the baseline pressure level when said float is in the higher position and said at least one vent opening is occluded by said float;
- and
- wherein the peak pressure level is defined by a setting of said adjustable pressure regulator.
A respiratory delivery system providing a bi-level pressure, the respiratory delivery system comprising:
- a container configured to support a volume of liquid;
- a lid configured to be secured to an upper end of said container, said lid defining an opening;
- a pipe mounted in said container and configured to be at least partially submerged into the volume of liquid, said pipe having a lower end secured to a bottom surface of said container and an upper end portion supported in said opening, said pipe defining at least one vent opening at a midsection thereof, and said pipe defining a sidewall recess above said at least one vent opening, wherein said pipe is configured to receive a flow of breathable gas from a gas source;
- a variable buoyancy float disposed along said pipe inside said container, said float configured to cyclically float up and down said pipe between a lower position and a higher position above said lower position, wherein when said float is in said higher position said at least one vent opening is occluded by said float and said sidewall recess is at least partially overlapped by said float;
- and
- an adjustable pressure regulator in fluid communication with said pipe and with the gas source;
- wherein said float is configured to cyclically shift a pressure level of said respiratory delivery system between a baseline pressure level when said float is in said lower position and gas bubbles are permitted to escape from said at least one vent opening, and a peak pressure level that is higher than said baseline pressure level when said float is in said higher position;
- and
- wherein said peak pressure level is defined by a setting of said adjustable pressure regulator.
Dependencies are inferred from the claim text.