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US 8,707,951 B2Granted
Process for operating a respirator
AssigneeDräger Medical GmbH
InventorsRalf Lorenzen, Hans-Joachim Kohl, Tobias Glaw, Tilman von Blumenthal
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Abstract
A process for controlling a respirator with reduced gas excess, wherein a load situation (37) of an expiration valve is polled in a continuous sequence and a flow value (36) is reduced step by step from a preset starting flow value (41) and wherein the flow value (36) is again increased when a predetermined value (44) is exceeded.
Claims21
A process for controlling a respirator with an expiration valve, the process comprising:
- providing a respiration flow with a preset starting rate of flow;
- providing an alternating pressure amplitude to the respiration flow in the rhythm of a high frequency by control actions including controlling the expiration valve;
- reducing a rate of flow step by step from the preset starting rate of flow by a first increment;
- determining a load situation of the expiration valve;
- monitoring an exceeding of a first threshold value of the load situation of the expiration valve;
- and when the first threshold value of the load situation is exceeded one of:
- increasing the rate of flow by a second increment;
- and
- not reducing the rate of flow further, monitoring an exceeding of a second threshold value of the load situation of the expiration valve and increasing the rate of flow by a second increment when the second threshold value of the load situation of the expiration valve is exceeded.
6 more elements
A process for controlling a respirator with an expiration valve, the process comprising:
- providing a patient feed line connected to a valve arrangement of the respirator, wherein the valve arrangement includes the expiration valve;
- providing a respiration flow with a preset starting flow value;
- providing an alternating pressure amplitude to the respiration flow in the patient feed line in the rhythm of a high frequency by control actions including controlling the valve arrangement;
- reducing a flow value, of the respiration flow, step by step from the preset starting flow value;
- determining a load situation of the expiration valve during the step of reducing;
- and
- maintaining the load situation of the expiration valve in a tolerance range by controlling the flow value.
4 more elements
Dependencies are inferred from the claim text.