Method and device for detecting leaks in respiratory gas supply systems
First Claim
1. Method for detecting leaks in respiratory gas supply systems, in which both the pressure of the respiratory gas and the volume flow of the respiratory gas are detected and fed into an evaluation unit, wherein the respiratory quantities pressure and flow are recorded by the evaluation unit for at least two successive respiratory cycles, that at least one control parameter with different signal amplitudes is preset for successive respiratory cycles, and that resistance, compliance, and leak resistance are determined by a computation based on differential curves of pressure and flow for these respiratory cycles.
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Abstract
The invention relates to a method and a device for detecting leaks in respiratory gas supply systems. Both the pressure and the volume flow of the respiratory gas are detected and the relevant values are supplied to an evaluation device. The evaluation device is used to calculate both the respiratory parameter resistance and compliance and the leak for at least two successive breathing cycles. At least one control parameter with different signal amplitudes is pre-determined for the successive breathing cycles. The leak resistance is determined from the resulting differential sequences of pressure and flow for the successive breathing cycles.
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29 Claims
- 1. Method for detecting leaks in respiratory gas supply systems, in which both the pressure of the respiratory gas and the volume flow of the respiratory gas are detected and fed into an evaluation unit, wherein the respiratory quantities pressure and flow are recorded by the evaluation unit for at least two successive respiratory cycles, that at least one control parameter with different signal amplitudes is preset for successive respiratory cycles, and that resistance, compliance, and leak resistance are determined by a computation based on differential curves of pressure and flow for these respiratory cycles.
- 17. Device for detecting leaks in respiratory gas supply systems, comprising a device for detecting the pressure of a respiratory gas and a device for detecting the volume flow of the respiratory gas, wherein the detection devices are connected to an evaluation unit, wherein the evaluation unit (14) is configured to determine the respiratory quantities pressure and flow, further comprising a storage device for at least one pair of value sequences of pressure and flow for a respiratory cycle, and means for generating at least one differential sequence for determining differential curves of compliance and resistance for at least two successive respiratory cycles.
Specification