Breathing aid apparatus in particular for treating sleep apnoea
First Claim
1. An apparatus for controlling the positive pressure of breathable gas to the airway of a patient, comprising:
- means for producing breathable gas at positive pressure;
means for controlling the positive pressure of the breathable gas;
means for determining an amplitude of variation of the means for controlling the positive pressure of the breathable gas;
means for detecting the presence of a hypopnoea as a function of the amplitude of variation; and
means for increasing the positive pressure of the breathable gas when the means for detecting reveals the presence of a hypopnoea.
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Accused Products
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.
208 Citations
20 Claims
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1. An apparatus for controlling the positive pressure of breathable gas to the airway of a patient, comprising:
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means for producing breathable gas at positive pressure;
means for controlling the positive pressure of the breathable gas;
means for determining an amplitude of variation of the means for controlling the positive pressure of the breathable gas;
means for detecting the presence of a hypopnoea as a function of the amplitude of variation; and
means for increasing the positive pressure of the breathable gas when the means for detecting reveals the presence of a hypopnoea. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for the treatment of sleep apnoea, comprising:
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a compressor configured to produce breathable gas at positive pressure;
a drive motor operably connected to the compressor;
a pressure detector in fluid communication with an outlet of the compressor;
a comparator having a first input, a second input and an output, wherein the pressure detector generates a pressure signal connected to the first input;
a motor control operably connected to the drive motor, the motor control configured to generate a drive motor rotational speed signal, wherein the motor control accepts the output of the comparator; and
a computer configured to accept the drive motor rotational speed signal, the computer further configured to calculate an amplitude of variation based on the drive motor rotational speed signal and to detect the presence of a hypopnoea, wherein the computer is configured to generate a pressure set point signal connected to the second input to the comparator, such that the set point is calculated to increase the positive pressure of the breathable gas when the amplitude of variation is indicative of a hypopnoea. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for controlling the positive pressure of breathable gas to the airway of a patient, comprising:
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producing breathable gas at positive pressure;
providing a controller to adjust the positive pressure of the breathable gas;
determining an amplitude of variation as a function of a signal from the controller; and
increasing the positive pressure of the breathable gas when the amplitude of variation reveals a hypopnoea. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification