Device For Administering a Breathing Gas and Method For Adjusting Breathing Gas Pressures That Alternate at Least in Some Phases
First Claim
1. A device for providing a breathing gas at alternating breathing gas pressure levels that at least in some phases are above the ambient pressure, having:
- a feeding device for feeding the breathing gas,a pressure adjusting device for triggering the feeding device, such that the feeding device, with recourse to a set-point breathing gas pressure signal, provides the breathing gas at a set-point breathing gas pressure level,a pressure specification device for generating the set-point breathing gas pressure signal that is definitive with regard to the set-point breathing gas pressure level, andparameter-determination means for providing parameters representative at least of the instantaneous breathing gas pressure p, the progression of time t, and the instantaneous breathing gas flow v,wherein the pressure specification device includes a computer circuit, and the computer circuit is configured such that it adjusts the set-point breathing gas pressure level as a function of the parameters provided by the parameter-determination means, in such a manner that at least in the expiratory phase, an adjustment of the breathing gas pressure to a pressure level is effected which is calculated on the basis of a dynamic or nonlinear pressure guidance function, which as such takes parameters into account that are indicative of the breathing gas flow and the progression of time and as a result, the tendency to lowering the breathing gas pressure in conjunction with the extent of the breathing gas flow decreases with increasing progression of time.
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Accused Products
Abstract
A device for furnishing a breathing gas at alternating pressure levels has a feeder to feed the breathing gas, a pressure adjusting device for triggering the feeder set-point breathing gas pressure signal, furnishes the breathing gas at a set-point, a pressure specification device for generating a pressure signal, and parameter-determination unit for furnishing parameters representative of at least of instantaneous pressure (p), progression of time (t), and instantaneous breathing gas flow (v). The pressure specification device includes a computer circuit configured such that, at least in the expiratory phase, pressure is adjusted on the basis of a dynamic or nonlinear pressure guidance function, which takes parameters into account that are indicative of the breathing gas flow and the progression of time. As a result, the tendency to lowering the breathing gas pressure in conjunction with the extent of the breathing gas flow decreases with increasing progression of time.
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Citations
16 Claims
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1. A device for providing a breathing gas at alternating breathing gas pressure levels that at least in some phases are above the ambient pressure, having:
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a feeding device for feeding the breathing gas, a pressure adjusting device for triggering the feeding device, such that the feeding device, with recourse to a set-point breathing gas pressure signal, provides the breathing gas at a set-point breathing gas pressure level, a pressure specification device for generating the set-point breathing gas pressure signal that is definitive with regard to the set-point breathing gas pressure level, and parameter-determination means for providing parameters representative at least of the instantaneous breathing gas pressure p, the progression of time t, and the instantaneous breathing gas flow v, wherein the pressure specification device includes a computer circuit, and the computer circuit is configured such that it adjusts the set-point breathing gas pressure level as a function of the parameters provided by the parameter-determination means, in such a manner that at least in the expiratory phase, an adjustment of the breathing gas pressure to a pressure level is effected which is calculated on the basis of a dynamic or nonlinear pressure guidance function, which as such takes parameters into account that are indicative of the breathing gas flow and the progression of time and as a result, the tendency to lowering the breathing gas pressure in conjunction with the extent of the breathing gas flow decreases with increasing progression of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A device for providing a breathing gas at alternating breathing gas pressure levels that at least in some phases are above the ambient pressure, having:
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a feeding device for feeding the breathing gas, a pressure adjusting device for triggering the feeding device, such that the feeding device, with recourse to a set-point breathing gas pressure signal, provides the breathing gas at a set-point breathing gas pressure level, a pressure specification device for generating the set-point breathing gas pressure signal that is definitive with regard to the set-point breathing gas pressure level, and parameter-determination means for providing parameters representative at least of the instantaneous breathing gas pressure p, the progression of time t, and the instantaneous breathing gas flow v, wherein the pressure specification device includes a computer circuit, and the computer circuit is configured such that it adjusts the set-point breathing gas pressure level as a function of the parameters provided by the parameter-determination means, in such a manner that at least in the expiratory phase, an adjustment of the breathing gas pressure to a pressure level is effected which is calculated on the basis of a pressure guidance function, which as such takes parameters into account that are indicative of the breathing gas flow and the progression of time and as a result, the tendency to lowering the breathing gas pressure in conjunction with the extent of the breathing gas flow decreases with increasing progression of time.
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15. A device for providing a breathing gas at alternating breathing gas pressure levels that at least in some phases are above the ambient pressure, having:
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a feeding device for feeding the breathing gas, a pressure adjusting device for triggering the feeding device, such that the feeding device, with recourse to a set-point breathing gas pressure signal, provides the breathing gas at a set-point breathing gas pressure level, a pressure specification device for generating the set-point breathing gas pressure signal that is definitive with regard to the set-point breathing gas pressure level, and parameter-determination means for providing parameters representative at least of the instantaneous breathing gas pressure p, the progression of time t, and the instantaneous breathing gas flow v, wherein the pressure specification device includes a computer circuit, and the computer circuit is configured such that it adjusts the set-point breathing gas pressure level as a function of the parameters provided by the parameter-determination means, in such a manner that at least in the expiratory phase, an adjustment of the breathing gas pressure to a pressure level is effected which is calculated on the basis of a pressure guidance function, which as such takes parameters into account that are indicative of the thermal load of the device and as a result, the tendency to lowering the breathing gas pressure decreases in conjunction with the level of thermal load.
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16. A method for providing a breathing gas at alternating breathing gas pressure levels that at least in some phases are above the ambient pressure, by using:
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a feeding device for feeding the breathing gas, a pressure adjusting device for triggering the feeding device, such that the feeding device, with recourse to a set-point breathing gas pressure signal, provides the breathing gas at a set-point breathing gas pressure level, a pressure specification device for generating the set-point breathing gas pressure signal that is definitive with regard to the set-point breathing gas pressure level, and parameter-determination means for providing parameters representative at least of the instantaneous breathing gas pressure p, the progression of time t, and the instantaneous breathing gas flow v, in which the set-point breathing gas pressure level is adjusted as a function of the parameters provided by the parameter-determination means, in such a manner that at least in the expiratory phase, an adjustment of the breathing gas pressure to a pressure level is effected which is calculated on the basis of a pressure guidance function, which as such takes parameters into account that are indicative of the breathing gas flow and the progression of time and as a result, the tendency to lowering the breathing gas pressure in conjunction with the extent of the breathing gas flow decreases with increasing progression of time.
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Specification