US 8,939,148 B2Granted

Process for the automatic control of a respirator

AssigneeDräger Medical GmbH

InventorsMarcus Eger, Hans-Ullrich Hansmann, Tobias Glaw, Frank Sattler

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Abstract

A process is provided for the automatic control of a respirator for changing over (triggering) between consecutive phases of respiration (inspiration and expiration phases), wherein a pneumatic breathing activity signal upneu(t) and a non-pneumatic breathing activity signal unon-pneu(t) of a patient are picked up. The intervals Δpneu(t) and Δnon-pneu(t) to the associated threshold variables are respectively determined starting from a preset reference point in time since the beginning of the present phase of respiration. The intervals are standardized to one another at δpneu(t) and δnon-pneu(t), such that the intervals have equal interval values at a preset reference point in time. The standardized intervals δpneu(t) and δnon-pneu(t) are averaged to a mean interval indicator and a changeover is made into the next phase of respiration when the combined interval indicator is 0.

Claims20

Dependent claims

A process for the automatic control of a respirator having a fan or a controllable respiratory gas pressure supply, a control unit controlling the fan or the respiratory gas pressure supply for a changing over between consecutive inspiration and expiration phases of respiration and sensors for detecting a pneumatic breathing activity signal upneu(t) and a non-pneumatic breathing activity signal unon-pneu(t), the sensors being connected to the control unit for transmitting measured signals, the process comprising the steps of:

picking up a pneumatic breathing activity signal upneu(t) and a non-pneumatic breathing activity signal unon-pneu(t) of a patient;
determining intervals Δpneu(t) and Δnon-pneu(t) to associated threshold variables starting from a preset reference point in time since the beginning of a present phase of respiration;
standardizing the intervals Δpneu(t) and Δnon-pneu(t) to one another at standardized intervals δpneu(t) and δnon-pneu(t), such that the standardized intervals δpneu(t) and δnon-pneu(t) have equal interval values at the preset reference point in time;
averaging the standardized intervals δpneu(t) and δnon-pneu(t) to a mean interval indicator;
and
changing over into a next phase of respiration when a combined interval indicator is 0.

3 more elements

A respirator comprising:

a fan or a controllable respiratory gas pressure supply;
a control unit controlling the fan or the respiratory gas pressure supply for performing consecutive phases of inspiration and expiration;
and
sensors for detecting a pneumatic breathing activity signal upneu(t) and a non pneumatic breathing activity signal unon-pneu(t), said sensors being connected to the control unit for transmitting measured signals, said control unit controlling the respirator for a changing over between consecutive inspiration and expiration phases of respiration, wherein said control unit is configured to:
receive the pneumatic breathing activity signal upneu(t) and the non-pneumatic breathing activity signal unon-pneu(t) of a patient;
determine intervals Δpneu(t) and Δnon-pneu(t) to associated threshold variables starting from a preset reference point in time since the beginning of a present phase of respiration;
standardize the intervals Δpneu(t) and Δnon-pneu(t) to one another at standardized intervals δpneu(t) and δnon-pneu(t), such that the standardized intervals δpneu(t) and δnon-pneu(t) have equal interval values at a preset reference point in time;
average the standardized intervals δpneu(t) and δnon-pneu(t) to a mean interval indicator;
change over into a next phase of respiration when a combined interval indicator is 0.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/194,052Filed 29 Jul 2011
Priority: DE 10 2010 055 25320 Dec 2010
Published: US 2012/0152250 A121 Jun 2012
Granted: 27 Jan 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

A61M 16/0051
Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators ; Tracheal tubes: with alarm devices
A61B 5/087
Measuring devices for evaluating the respiratory organs: measuring breath flow
A61B 5/091
Measuring devices for evaluating the respiratory organs: measuring volume of inspired or expired gases, e.g. to determine lung capacity
A61B 5/389
Modalities, i.e. specific diagnostic methods: electromyography [EMG]