Breathing aid apparatus in particular for treating sleep apnoea
First Claim
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1. Breathing aid apparatus, comprising:
- means for producing a flow of breathable gas to a patient having respiratory activity;
means for controlling pressure of the flow of the breathable gas;
means for calculating an amplitude of variation indicative of the respiratory activity of a patient, further including means for calculating the amplitude of variation as a function of a variable measured from the means for producing a flow of breathable gas;
detecting means for determining the presence of a hypopnoea from an analysis of the amplitude of variation; and
adjustment means for increasing the pressure of the flow of breathable gas when said detecting means determines the presence of hypopnoea.
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Abstract
A compressor driven by a motor sends to a nasal mask a breathable gas at a low positive relative pressure whereby the motor is controlled to maintain the pressure in the delivery pipe of the compressor substantially equal to a set point, independently of the inspiration and expiration of the patient, a computer receiving on an input a motor speed signal as a parameter representative of the respiratory activity of the patient and analyzing the motor speed variations whereby the computer will increase the pressure set point if necessary or reduces the pressure set point by a predetermined amount depending upon whether there is a hypopnoea or the absence thereof.
217 Citations
24 Claims
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1. Breathing aid apparatus, comprising:
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means for producing a flow of breathable gas to a patient having respiratory activity;
means for controlling pressure of the flow of the breathable gas;
means for calculating an amplitude of variation indicative of the respiratory activity of a patient, further including means for calculating the amplitude of variation as a function of a variable measured from the means for producing a flow of breathable gas;
detecting means for determining the presence of a hypopnoea from an analysis of the amplitude of variation; and
adjustment means for increasing the pressure of the flow of breathable gas when said detecting means determines the presence of hypopnoea. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Breathing aid apparatus, comprising:
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a compressor having a drive motor and configured to produce a flow of breathable gas to a patient;
a pressure detector in fluid communication with an outlet of said compressor;
a comparator having a first input, a second input and an output, wherein the pressure detector generates a first signal connected to the first input;
a motor control operably connected to the drive motor of said compressor and which generates a second signal indicative of the rotational speed of the drive motor, wherein the motor control accepts the output of the comparator; and
a computer configured to accept the second signal from the motor control, the computer further configured to calculate an amplitude of variation based on the second signal and to detect the presence of a hypopnoea, wherein the computer generates a pressure set point connected to the second input to the comparator, such that the set point is calculated to increase the pressure of the flow of breathable gas when the amplitude of variation is indicative of a hypopnoea. - View Dependent Claims (12, 13, 14, 15, 16, 19)
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17. A method for treating sleep apnoea with a breathing aid apparatus, comprising:
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producing a flow of breathable gas to a patient having respiratory activity;
controlling pressure of the flow of the breathable gas;
calculating an amplitude of variation indicative of the respiratory activity of the patient, further including calculating the amplitude of variation as a function of a variable measured from a means for producing a flow of breathable gas; and
increasing the pressure of the flow of breathable gas when the amplitude of variation is indicative of a hypopnoea. - View Dependent Claims (18, 20, 21, 22)
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23. Breathing aid apparatus, comprising:
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means for producing a flow of breathable gas to a patient having respiratory activity;
means for controlling pressure of the flow of the breathable gas;
means for calculating an amplitude of variation indicative of the respiratory activity of a patient, further including means for calculating the amplitude of variation as a function of a variable-measured from the means for producing a flow of breathable gas;
detecting means for determining the presence of a hypopnoea from an analysis of the amplitude of variation; and
adjustment means for increasing the pressure of the flow of breathable gas when detecting means determines the presence of a hypopnoea, and for decreasing the pressure of the flow of breathable gas when said detecting means determines the presence of normal breathing.
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24. Breathing aid apparatus, comprising:
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a compressor having a drive motor and configured to produce a flow of breathable gas to a patient;
a pressure detector in fluid communication with an outlet of said compressor;
a comparator having a first input, a second input and an output, wherein the pressure detector generates a first signal connected to the first input;
a motor control operably connected to the drive motor of said compressor and which generates a second signal indicative of the rotational speed of the drive motor, wherein the motor control accepts the output of the comparator; and
a computer configured to accept the second signal from the motor control, the computer further configured to calculate an amplitude of variation based on the second signal and to detect the presence of a hypopnoea, wherein the computer generates a pressure set point connected to the second input to the comparator, such that the set point is calculated to increase the pressure of the flow of breathable gas when the amplitude of variation is indicative of a hypopnoea, and to decrease the pressure of the flow of breathable gas when the amplitude of variation is indicative of normal breathing.
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Specification