High-frequency oscillation patient ventillator system
First Claim
1. A breathing assist system comprising:
- a patient circuit adapted for connection to airways of a patient;
a high-frequency oscillation ventilator connected to said patient circuit and operable to induce oscillations in gas in said circuit at a predetermined high frequency;
a gas supply connected to the patient circuit for supplying breathing gas thereto;
a detection device which monitors operation of the high-frequency oscillation ventilator comprising a gas sensor which produces an output signal representing at least one parameter selected from the group consisting of gas pressure and gas flow, said analyzer emitting and an analyzer which receives said output signal and which calculates from said output signal at least one average periodic value for said at least one parameter, a trigger signal dependent on a deviation of said calculated at least one average periodic value from an associated predetermined value indicating a spontaneous breathing effort; and
said trigger signal being supplied from said analyzer to said gas supply and said gas supply, upon receipt of said trigger signal, supplying breathing gas to said circuit at a level to assist said spontaneous breathing effort.
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Accused Products
Abstract
A patient ventilator system has a high-frequency oscillation ventilator connectable to a patient circuit and operable to induce oscillations within gas in the circuit at a predetermined high-frequency and a gas supply connectable to the patient circuit for supplying breathing gas thereto. A detection device is also included within the ventilator system and is adapted to monitor during the operation of the high-frequency oscillator ventilator, gas pressure and/or gas flow to detect a variation therein not derived from the induced high-frequency oscillations and to output a trigger signal dependent on the detected variation indicating a spontaneous breathing effort. The gas supply is operable on receipt of the trigger signal to supply breathing gas into the circuit at a level to assist the spontaneous breathing effort.
181 Citations
6 Claims
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1. A breathing assist system comprising:
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a patient circuit adapted for connection to airways of a patient;
a high-frequency oscillation ventilator connected to said patient circuit and operable to induce oscillations in gas in said circuit at a predetermined high frequency;
a gas supply connected to the patient circuit for supplying breathing gas thereto;
a detection device which monitors operation of the high-frequency oscillation ventilator comprising a gas sensor which produces an output signal representing at least one parameter selected from the group consisting of gas pressure and gas flow, said analyzer emitting and an analyzer which receives said output signal and which calculates from said output signal at least one average periodic value for said at least one parameter, a trigger signal dependent on a deviation of said calculated at least one average periodic value from an associated predetermined value indicating a spontaneous breathing effort; and
said trigger signal being supplied from said analyzer to said gas supply and said gas supply, upon receipt of said trigger signal, supplying breathing gas to said circuit at a level to assist said spontaneous breathing effort. - View Dependent Claims (2, 3, 4)
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5. A detection device for use with a high-frequency oscillation ventilator adapted for connection to a patient via a patient circuit, said detection device comprising:
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a gas sensor for sensing a parameter selected from the group consisting of gas pressure and gas flow in said patient circuit, and which produces a sensor output representing said parameter; and
an analyzer supplied with said sensor output for analyzing said sensor output to detect a variation therein which does not arise from oscillations induced by said ventilator at a predetermined high-frequency, said analyzer receiving said output signal and calculating from said output signal at least one average periodic value for said at least one parameter, and emitting a trigger signal dependent on a deviation of said calculated at least one average periodic value from an associated predetermined value, indicating a spontaneous breathing effort. - View Dependent Claims (6)
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Specification