Device and method of reducing bias flow in oscillatory ventilators
AssigneeThe Research Foundatilon of State University of New York
InventorsBradley P. Fuhrman, Mark S. Dowhy
Life of this patent
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Abstract
A device and method of ventilating a patient reduces the bias flow relative to existing oscillatory ventilators. The device has a gas flow circuit comprising an oscillating line, a patient line and an exhalation or a return line. A gas supply line is and an outlet valve are in pneumatic communication with the gas flow circuit. One or more CO2 scrubbers and one or more check valves are provided in the circuit. A method of ventilating using such a device is also disclosed.
Claims27
A device for attachment to an oscillating ventilator comprising a gas flow circuit comprising:
- an oscillating line having a first end and a second end, wherein the first end is adapted for communication with an oscillator through a connecting tube;
- a patient line connected to the second end of the oscillating line;
- a return line, wherein both ends of the return line are connected to the oscillating line;
- a check valve in the oscillating line located between the two ends of the return line;
- and
- a CO2 scrubber located in the oscillating line or return line.
A device for attachment to an oscillating ventilator comprising:
- a) a gas flow circuit comprising:
- an oscillating line having a first end and a second end, wherein the first end is adapted for pneumatic communication with an oscillator;
- a patient line connected to the second end of the oscillating line;
- a return line, wherein both ends of the return line are connected to the oscillating line;
- a check valve in the oscillating line located between the two ends of the return line;
- a CO2 scrubber located in the oscillating line or return line.
- b) a gas supply line in pneumatic communication with the gas flow circuit;
- and
- c) an outlet valve in pneumatic communication with the gas flow circuit
A device for attaching to an oscillating ventilator comprising:
- a) a gas flow circuit comprising:
- an oscillating line having a first end and a second end, the first end is adapted for connecting to the oscillating ventilator and having a check valve;
- a patient line connected to the second end of the oscillating line;
- and
- an exhalation line having one end connected to the patient line and the other end connected to the oscillating line and having a CO2 scrubber;
- b) a gas supply line in pneumatic communication with the gas flow circuit;
- and
- c) an outlet valve in pneumatic communication with the gas flow circuit.
A method of ventilating, comprising the steps of:
- providing a ventilating device having an oscillator, a gas flow circuit comprising an oscillating line including a first end and a second end, wherein the first end is in pneumatic relationship with the oscillator and the second end is connected to a patient line, an exhalation line having a CO2 scrubber and connected to the patient line at one end and to the oscillating line at the other end, and further having a gas supply line and an outlet valve connected to the gas flow circuit, and a CO2 scrubber;
- providing a patient connected to the patient line;
- supplying gas with the gas supply line to the gas flow circuit;
- and
- causing the movement of the oscillator toward and away from the oscillating line.
Dependencies are inferred from the claim text.