Method for adaptive triggering of a breathing device, and breathing device with adaptive triggering
First Claim
1. A method for adaptively triggering respiration phases in a breathing device, comprising the steps of:
- determining a first respiration indicator signal in a breathing gas circuit based on at least one parameter selected from the group consisting of flow and pressure in said breathing gas circuit;
comparing said first respiration indicator signal with a trigger requirement;
generating a trigger signal to trigger a respiratory phase when said first respiration indicator signal satisfies said trigger requirement;
measuring an excitable cell signal related to respiration in a patient participating in said breathing gas circuit;
determining a second respiration indicator signal based on the measured excitable cell signal; and
adapting said trigger requirement dependent on said second respiration indicator signal.
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Accused Products
Abstract
In a method for adaptive triggering of respiratory phases in a breathing device, and a breathing device operating according to the method, first respiration indicator signal is determined based on at least one of the parameters flow and pressure, the respiration indicator signal is compared with a trigger requirement and a trigger signal is generated when the respiration indicator signal fulfils the trigger requirement. In order to shorten response times to respiration changes without losing stability, an excitable cell signal related to respiration is measured, and a second respiration indicator signal is determined based on the measured excitable cell signal, and the trigger requirement is adapted in relation to the second respiration indicator signal.
37 Citations
15 Claims
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1. A method for adaptively triggering respiration phases in a breathing device, comprising the steps of:
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determining a first respiration indicator signal in a breathing gas circuit based on at least one parameter selected from the group consisting of flow and pressure in said breathing gas circuit;
comparing said first respiration indicator signal with a trigger requirement;
generating a trigger signal to trigger a respiratory phase when said first respiration indicator signal satisfies said trigger requirement;
measuring an excitable cell signal related to respiration in a patient participating in said breathing gas circuit;
determining a second respiration indicator signal based on the measured excitable cell signal; and
adapting said trigger requirement dependent on said second respiration indicator signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A breathing device comprising:
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a tubing system adapted for communication with a subject;
a pneumatic unit in communication with said tubing system for regulating a flow of breathing gas in said tubing system;
a sensor system in communication with said tubing system including at least one meter selected from the group consisting of a flow meter for measuring flow of said breathing gas in said tubing system and a pressure meter for measuring a pressure of said breathing gas in said tubing system;
a control unit connected to said pneumatic unit for controlling said pneumatic unit, said control unit comprising a first determination unit connected to said sensor system for receiving a measurement signal from said measurement system representing said at least one parameter and for determining a first respiration indication signal based on said at least one parameter, a comparator connected to said first determination unit and receiving said first respiration indication signal therefrom and comparing said first respiration indication signal with a trigger requirement, said comparator generating a comparator output dependent on whether said trigger requirement is satisfied by said first respiration indication signal, and a signal generator supplied with said comparator output which generates a trigger signal for controlling triggering of respiratory phases dependent on said comparator output;
an excitable cell detector adapted for detecting excitable cell signals related to respiration by said subject;
a second determination unit supplied with said excitable cell signals which determines a second respiration indicator signal based on said excitable cell signals; and
an adaptation unit supplied with said second respiration indicator and connected to said comparator, said adaptation unit adapting said trigger requirement dependent on said second respiration indicator signal and supplying said trigger requirement to said comparator. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification